[clang] [llvm] [LLVM][AArch64] Add new feature +sme-mop4 and +sme-tmop (PR #121935)

via llvm-commits llvm-commits at lists.llvm.org
Tue Jan 7 05:58:03 PST 2025


https://github.com/CarolineConcatto created https://github.com/llvm/llvm-project/pull/121935

The 2024-12 ISA spec release[1] add these features:
 FEAT_SME_MOP4(sme-mop4) to enable SME Quarter-tile outer product instructions
and
 FEAT_SME_TMOP(sme-tmop) to enable SME Structured sparsity outer product instructions
to allow these instructions to be available outside Armv9.6/sme2p2

[1] https://developer.arm.com/Architectures/A-Profile%20Architecture#Downloads

>From 3fa7236acde7dced9582d0ef9acee975405e0ed4 Mon Sep 17 00:00:00 2001
From: Caroline Concatto <caroline.concatto at arm.com>
Date: Wed, 18 Dec 2024 17:38:29 +0000
Subject: [PATCH] [AArch64] Add new feature +sme-mop4 and +sme-tmop

The 2024-12 ISA spec release[1] add these features:
 FEAT_SME_MOP4(sme-mop4) to enable SME Quarter-tile outer product instructions
and
 FEAT_SME_TMOP(sme-tmop) to enable SME Structured sparsity outer product instructions
to allow these instructions to be available outside Armv9.6/sme2p2

[1] https://developer.arm.com/Architectures/A-Profile%20Architecture#Downloads
---
 .../print-supported-extensions-aarch64.c      |  2 +
 llvm/lib/Target/AArch64/AArch64.td            |  3 +-
 llvm/lib/Target/AArch64/AArch64Features.td    |  6 +++
 llvm/lib/Target/AArch64/AArch64InstrInfo.td   |  8 +++
 .../lib/Target/AArch64/AArch64SMEInstrInfo.td | 53 +++++++++++--------
 .../AArch64/AsmParser/AArch64AsmParser.cpp    |  2 +
 .../MC/AArch64/SME2p2/bfmop4as-non-widening.s | 50 ++++++++---------
 .../MC/AArch64/SME2p2/bfmop4as-widening.s     | 50 ++++++++---------
 llvm/test/MC/AArch64/SME2p2/bftmopa.s         | 14 ++---
 llvm/test/MC/AArch64/SME2p2/directive-arch.s  |  8 +++
 .../AArch64/SME2p2/fmop4a-fp8-fp16-widening.s | 26 ++++-----
 .../AArch64/SME2p2/fmop4a-fp8-fp32-widening.s | 26 ++++-----
 .../SME2p2/fmop4as-fp16-fp32-widening.s       | 50 ++++++++---------
 .../SME2p2/fmop4as-fp16-non-widening.s        | 50 ++++++++---------
 .../SME2p2/fmop4as-fp32-non-widening.s        | 50 ++++++++---------
 .../SME2p2/fmop4as-fp64-non-widening.s        | 50 ++++++++---------
 llvm/test/MC/AArch64/SME2p2/ftmopa.s          | 34 ++++++------
 llvm/test/MC/AArch64/SME2p2/smop4a-16to32.s   | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/smop4a-64.s       | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/smop4a-8to32.s    | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/smop4s-16to32.s   | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/smop4s-64.s       | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/smop4s-8to32.s    | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/stmopa.s          | 14 ++---
 llvm/test/MC/AArch64/SME2p2/sumop4a-32.s      | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/sumop4a-64.s      | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/sumop4s-32.s      | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/sumop4s-64.s      | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/sutmopa.s         |  8 +--
 llvm/test/MC/AArch64/SME2p2/umop4a-16to32.s   | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/umop4a-64.s       | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/umop4a-8to32.s    | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/umop4s-64.s       | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/umop4s-8to32.s    | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/usmop4a-32.s      | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/usmop4a-64.s      | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/usmop4s-32.s      | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/usmop4s-64.s      | 26 ++++-----
 llvm/test/MC/AArch64/SME2p2/ustmopa.s         |  8 +--
 llvm/test/MC/AArch64/SME2p2/utmopa.s          | 14 ++---
 .../TargetParser/TargetParserTest.cpp         | 10 +++-
 41 files changed, 570 insertions(+), 460 deletions(-)

diff --git a/clang/test/Driver/print-supported-extensions-aarch64.c b/clang/test/Driver/print-supported-extensions-aarch64.c
index 09d499548aa565..77812189f12d0d 100644
--- a/clang/test/Driver/print-supported-extensions-aarch64.c
+++ b/clang/test/Driver/print-supported-extensions-aarch64.c
@@ -51,6 +51,8 @@
 // CHECK-NEXT:     pcdphint            FEAT_PCDPHINT                                          Enable Armv9.6-A Producer Consumer Data Placement hints
 // CHECK-NEXT:     pmuv3               FEAT_PMUv3                                             Enable Armv8.0-A PMUv3 Performance Monitors extension
 // CHECK-NEXT:     pops                FEAT_PoPS                                              Enable Armv9.6-A Point Of Physical Storage (PoPS) DC instructions
+// CHECK-NEXT:     sme-mop4            FEAT_SME_MOP4                                          Enable SME Quarter-tile outer product instructions
+// CHECK-NEXT:     sme-tmop            FEAT_SME_TMOP                                          Enable SME Structured sparsity outer product instructions
 // CHECK-NEXT:     predres             FEAT_SPECRES                                           Enable Armv8.5-A execution and data prediction invalidation instructions
 // CHECK-NEXT:     rng                 FEAT_RNG                                               Enable Random Number generation instructions
 // CHECK-NEXT:     ras                 FEAT_RAS, FEAT_RASv1p1                                 Enable Armv8.0-A Reliability, Availability and Serviceability Extensions
diff --git a/llvm/lib/Target/AArch64/AArch64.td b/llvm/lib/Target/AArch64/AArch64.td
index e3dd334e7b098b..67cc98965b5799 100644
--- a/llvm/lib/Target/AArch64/AArch64.td
+++ b/llvm/lib/Target/AArch64/AArch64.td
@@ -74,7 +74,8 @@ def SVEUnsupported : AArch64Unsupported {
 }
 
 let F = [HasSME2p2, HasSVE2p2orSME2p2, HasNonStreamingSVEorSME2p2,
-         HasNonStreamingSVE2p2orSME2p2] in
+         HasNonStreamingSVE2p2orSME2p2, HasSME2p2orSME_MOP4,
+         HasSME2p2orSME_TMOP] in
 def SME2p2Unsupported : AArch64Unsupported;
 
 def SME2p1Unsupported : AArch64Unsupported {
diff --git a/llvm/lib/Target/AArch64/AArch64Features.td b/llvm/lib/Target/AArch64/AArch64Features.td
index 41eb9a73bd013d..e9606c2db60673 100644
--- a/llvm/lib/Target/AArch64/AArch64Features.td
+++ b/llvm/lib/Target/AArch64/AArch64Features.td
@@ -565,6 +565,12 @@ def FeaturePCDPHINT: ExtensionWithMArch<"pcdphint", "PCDPHINT", "FEAT_PCDPHINT",
 def FeaturePoPS: ExtensionWithMArch<"pops", "PoPS", "FEAT_PoPS",
   "Enable Armv9.6-A Point Of Physical Storage (PoPS) DC instructions">;
 
+def FeatureSME_MOP4: ExtensionWithMArch<"sme-mop4", "SME_MOP4", "FEAT_SME_MOP4",
+  "Enable SME Quarter-tile outer product instructions", [FeatureSME2]>;
+
+def FeatureSME_TMOP: ExtensionWithMArch<"sme-tmop", "SME_TMOP", "FEAT_SME_TMOP",
+  "Enable SME Structured sparsity outer product instructions.", [FeatureSME2]>;
+
 //===----------------------------------------------------------------------===//
 //  Other Features
 //===----------------------------------------------------------------------===//
diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.td b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
index c6f5cdcd1d5fe7..3983665c69b2cb 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
@@ -286,6 +286,14 @@ def HasNonStreamingSVE2p2orSME2p2
                 "(Subtarget->isSVEorStreamingSVEAvailable() && Subtarget->hasSME2p2())">,
                 AssemblerPredicateWithAll<(any_of FeatureSVE2p2, FeatureSME2p2),
                 "sme2p2 or sve2p2">;
+def HasSME2p2orSME_MOP4
+    : Predicate<"(Subtarget->isStreaming() &&"
+                "(Subtarget->hasSME2p2() || Subtarget->hasSME_MOP4()))">,
+                AssemblerPredicateWithAll<(any_of FeatureSME2p2, FeatureSME_MOP4), "sme2p2 or sme-mop4">;
+def HasSME2p2orSME_TMOP
+    : Predicate<"(Subtarget->isStreaming() &&"
+                "(Subtarget->hasSME2p2()) || Subtarget->hasSME_TMOP()))">,
+                AssemblerPredicateWithAll<(any_of FeatureSME2p2, FeatureSME_TMOP), "sme2p2 or sme-tmop">;
 
 // A subset of NEON instructions are legal in Streaming SVE execution mode,
 // so don't need the additional check for 'isNeonAvailable'.
diff --git a/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td b/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
index aee54ed47a3ab4..33a032974c4594 100644
--- a/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
@@ -147,7 +147,7 @@ defm USMOPA_MPPZZ_D : sme_int_outer_product_i64<0b100, "usmopa", int_aarch64_sme
 defm USMOPS_MPPZZ_D : sme_int_outer_product_i64<0b101, "usmops", int_aarch64_sme_usmops_wide>;
 }
 
-let Predicates = [HasSME2p2] in {
+let Predicates = [HasSME2p2orSME_MOP4] in {
   defm SMOP4A  : sme_quarter_outer_product_i8_i32<0b0, 0b0, 0b0, "smop4a">;
   defm SMOP4S  : sme_quarter_outer_product_i8_i32<0b0, 0b0, 0b1, "smop4s">;
   defm SUMOP4A : sme_quarter_outer_product_i8_i32<0b0, 0b1, 0b0, "sumop4a">;
@@ -163,7 +163,7 @@ let Predicates = [HasSME2p2] in {
   defm UMOP4S : sme_quarter_outer_product_i16_i32<0b1, 0b1, "umop4s">;
 }
 
-let Predicates = [HasSME2p2, HasSMEI16I64] in {
+let Predicates = [HasSME2p2orSME_MOP4, HasSMEI16I64] in {
   defm SMOP4A : sme_quarter_outer_product_i64<0b0, 0b0, 0b0, "smop4a">;
   defm SMOP4S : sme_quarter_outer_product_i64<0b0, 0b0, 0b1, "smop4s">;
   defm SUMOP4A : sme_quarter_outer_product_i64<0b0, 0b1, 0b0, "sumop4a">;
@@ -174,7 +174,7 @@ let Predicates = [HasSME2p2, HasSMEI16I64] in {
   defm USMOP4S : sme_quarter_outer_product_i64<0b1, 0b0, 0b1, "usmop4s">;
 }
 
-let Predicates = [HasSME2p2] in {
+let Predicates = [HasSME2p2orSME_TMOP] in {
 def STMOPA_M2ZZZI_BtoS  : sme_int_sparse_outer_product_i32<0b00100, ZZ_b_mul_r, ZPR8,  "stmopa">;
 def STMOPA_M2ZZZI_HtoS  : sme_int_sparse_outer_product_i32<0b00101, ZZ_h_mul_r, ZPR16, "stmopa">;
 def UTMOPA_M2ZZZI_BtoS  : sme_int_sparse_outer_product_i32<0b11100, ZZ_b_mul_r, ZPR8,  "utmopa">;
@@ -1053,41 +1053,52 @@ let Predicates = [HasSME2, HasSVEBFSCALE] in {
   defm BFSCALE : sme2_bfscale_multi<"bfscale">;
 }
 
-let Predicates = [HasSME2p2] in {
+let Predicates = [HasSME2p2orSME_MOP4] in {
+  defm BFMOP4A : sme2_bfmop4as_widening<0, "bfmop4a">;
+  defm BFMOP4S : sme2_bfmop4as_widening<1, "bfmop4s">;
+
+  defm FMOP4A : sme2_fmop4as_fp16_fp32_widening<0, "fmop4a">;
+  defm FMOP4S : sme2_fmop4as_fp16_fp32_widening<1, "fmop4s">;
+
+  defm FMOP4A : sme2_fmop4as_fp32_non_widening<0, "fmop4a">;
+  defm FMOP4S : sme2_fmop4as_fp32_non_widening<1, "fmop4s">;
+}
+
+let Predicates = [HasSME2p2orSME_TMOP] in {
   def FTMOPA_M2ZZZI_HtoS  : sme_tmopa_32b<0b11000, ZZ_h_mul_r, ZPR16, "ftmopa">;
   def FTMOPA_M2ZZZI_StoS  : sme_tmopa_32b<0b00000, ZZ_s_mul_r, ZPR32, "ftmopa">;
   def BFTMOPA_M2ZZZI_HtoS : sme_tmopa_32b<0b10000, ZZ_h_mul_r, ZPR16, "bftmopa">;
+}
 
-  defm BFMOP4A : sme2_bfmop4as_widening<0, "bfmop4a">;
-  defm BFMOP4S : sme2_bfmop4as_widening<1, "bfmop4s">;
-
+let Predicates = [HasSME2p2] in {
   defm FMUL_2ZZ  : sme2_multi2_fmul_sm<"fmul">;
   defm FMUL_2Z2Z : sme2_multi2_fmul_mm< "fmul">;
   defm FMUL_4ZZ  : sme2_multi4_fmul_sm<"fmul">;
   defm FMUL_4Z4Z : sme2_multi4_fmul_mm< "fmul">;
 
-  defm FMOP4A : sme2_fmop4as_fp32_non_widening<0, "fmop4a">;
-  defm FMOP4S : sme2_fmop4as_fp32_non_widening<1, "fmop4s">;
-
-  defm FMOP4A : sme2_fmop4as_fp16_fp32_widening<0, "fmop4a">;
-  defm FMOP4S : sme2_fmop4as_fp16_fp32_widening<1, "fmop4s">;
-}
+} // [HasSME2p2]
 
-let Predicates = [HasSME2p2, HasSMEB16B16] in {
+let Predicates = [HasSME2p2orSME_TMOP, HasSMEB16B16] in {
   def BFTMOPA_M2ZZZI_HtoH : sme_tmopa_16b<0b11001, ZZ_h_mul_r, ZPR16, "bftmopa">;
 }
 
-let Predicates = [HasSME2p2, HasSMEF8F32], Uses = [FPMR, FPCR] in {
+let Predicates = [HasSME2p2orSME_TMOP, HasSMEF8F32], Uses = [FPMR, FPCR] in {
   def FTMOPA_M2ZZZI_BtoS : sme_tmopa_32b<0b01000, ZZ_b_mul_r, ZPR8, "ftmopa">;
-}
+} 
 
-let Predicates = [HasSME2p2, HasSMEF8F16], Uses = [FPMR, FPCR] in {
+let Predicates = [HasSME2p2orSME_TMOP, HasSMEF8F16], Uses = [FPMR, FPCR] in {
   def FTMOPA_M2ZZZI_BtoH : sme_tmopa_16b<0b01001, ZZ_b_mul_r, ZPR8, "ftmopa">;
+}
+
+let Predicates = [HasSME2p2orSME_MOP4, HasSMEF8F16], Uses = [FPMR, FPCR] in {
   defm FMOP4A : sme2_fmop4a_fp8_fp16_2way<"fmop4a">;
 }
 
-let Predicates = [HasSME2p2, HasSMEF16F16] in {
+let Predicates = [HasSME2p2orSME_TMOP, HasSMEF16F16] in {
   def FTMOPA_M2ZZZI_HtoH : sme_tmopa_16b<0b10001, ZZ_h_mul_r, ZPR16, "ftmopa">;
+}
+
+let Predicates = [HasSME2p2orSME_MOP4, HasSMEF16F16] in {
   defm FMOP4A : sme2_fmop4as_fp16_non_widening<0, "fmop4a">;
   defm FMOP4S : sme2_fmop4as_fp16_non_widening<1, "fmop4s">;
 }
@@ -1098,17 +1109,17 @@ let Predicates = [HasSME2, HasSVEBFSCALE] in {
 }
 
 let Uses = [FPMR, FPCR] in {
-let Predicates = [HasSME2p2, HasSMEF8F32] in {
+let Predicates = [HasSME2p2orSME_MOP4, HasSMEF8F32] in {
   defm FMOP4A : sme2_fmop4a_fp8_fp32_4way<"fmop4a">;
 }
 }
 
-let Predicates = [HasSME2p2, HasSMEB16B16] in {
+let Predicates = [HasSME2p2orSME_MOP4, HasSMEB16B16] in {
   defm BFMOP4A : sme2_bfmop4as_non_widening<0, "bfmop4a">;
   defm BFMOP4S : sme2_bfmop4as_non_widening<1, "bfmop4s">;
 }
 
-let Predicates = [HasSME2p2, HasSMEF64F64] in {
+let Predicates = [HasSME2p2orSME_MOP4, HasSMEF64F64] in {
   defm FMOP4A : sme2_fmop4as_fp64_non_widening<0, "fmop4a">;
   defm FMOP4S : sme2_fmop4as_fp64_non_widening<1, "fmop4s">;
 }
diff --git a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
index f44afd804c2bde..8b0296f7c788e9 100644
--- a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -3827,6 +3827,8 @@ static const struct Extension {
     {"lsui", {AArch64::FeatureLSUI}},
     {"occmo", {AArch64::FeatureOCCMO}},
     {"pcdphint", {AArch64::FeaturePCDPHINT}},
+    {"sme-mop4", {AArch64::FeatureSME_MOP4}},
+    {"sme-tmop", {AArch64::FeatureSME_TMOP}},
 };
 
 static void setRequiredFeatureString(FeatureBitset FBS, std::string &Str) {
diff --git a/llvm/test/MC/AArch64/SME2p2/bfmop4as-non-widening.s b/llvm/test/MC/AArch64/SME2p2/bfmop4as-non-widening.s
index b98bb99def0569..eb3382b67e9cfd 100644
--- a/llvm/test/MC/AArch64/SME2p2/bfmop4as-non-widening.s
+++ b/llvm/test/MC/AArch64/SME2p2/bfmop4as-non-widening.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-b16b16 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-b16b16 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-b16b16 < %s \
@@ -19,19 +21,19 @@
 bfmop4a za0.h, z0.h, z16.h  // 10000001-00100000-00000000-00001000
 // CHECK-INST: bfmop4a za0.h, z0.h, z16.h
 // CHECK-ENCODING: [0x08,0x00,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81200008 <unknown>
 
 bfmop4a za1.h, z12.h, z24.h  // 10000001-00101000-00000001-10001001
 // CHECK-INST: bfmop4a za1.h, z12.h, z24.h
 // CHECK-ENCODING: [0x89,0x01,0x28,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81280189 <unknown>
 
 bfmop4a za1.h, z14.h, z30.h  // 10000001-00101110-00000001-11001001
 // CHECK-INST: bfmop4a za1.h, z14.h, z30.h
 // CHECK-ENCODING: [0xc9,0x01,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 812e01c9 <unknown>
 
 // Single and multiple vectors
@@ -39,19 +41,19 @@ bfmop4a za1.h, z14.h, z30.h  // 10000001-00101110-00000001-11001001
 bfmop4a za0.h, z0.h, {z16.h-z17.h}  // 10000001-00110000-00000000-00001000
 // CHECK-INST: bfmop4a za0.h, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x00,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81300008 <unknown>
 
 bfmop4a za1.h, z12.h, {z24.h-z25.h}  // 10000001-00111000-00000001-10001001
 // CHECK-INST: bfmop4a za1.h, z12.h, { z24.h, z25.h }
 // CHECK-ENCODING: [0x89,0x01,0x38,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81380189 <unknown>
 
 bfmop4a za1.h, z14.h, {z30.h-z31.h}  // 10000001-00111110-00000001-11001001
 // CHECK-INST: bfmop4a za1.h, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xc9,0x01,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 813e01c9 <unknown>
 
 // Multiple and single vectors
@@ -59,19 +61,19 @@ bfmop4a za1.h, z14.h, {z30.h-z31.h}  // 10000001-00111110-00000001-11001001
 bfmop4a za0.h, {z0.h-z1.h}, z16.h  // 10000001-00100000-00000010-00001000
 // CHECK-INST: bfmop4a za0.h, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x08,0x02,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81200208 <unknown>
 
 bfmop4a za1.h, {z12.h-z13.h}, z24.h  // 10000001-00101000-00000011-10001001
 // CHECK-INST: bfmop4a za1.h, { z12.h, z13.h }, z24.h
 // CHECK-ENCODING: [0x89,0x03,0x28,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81280389 <unknown>
 
 bfmop4a za1.h, {z14.h-z15.h}, z30.h  // 10000001-00101110-00000011-11001001
 // CHECK-INST: bfmop4a za1.h, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xc9,0x03,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 812e03c9 <unknown>
 
 // Multiple vectors
@@ -79,19 +81,19 @@ bfmop4a za1.h, {z14.h-z15.h}, z30.h  // 10000001-00101110-00000011-11001001
 bfmop4a za0.h, {z0.h-z1.h}, {z16.h-z17.h}  // 10000001-00110000-00000010-00001000
 // CHECK-INST: bfmop4a za0.h, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x02,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81300208 <unknown>
 
 bfmop4a za1.h, {z12.h-z13.h}, {z24.h-z25.h}  // 10000001-00111000-00000011-10001001
 // CHECK-INST: bfmop4a za1.h, { z12.h, z13.h }, { z24.h, z25.h }
 // CHECK-ENCODING: [0x89,0x03,0x38,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81380389 <unknown>
 
 bfmop4a za1.h, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00111110-00000011-11001001
 // CHECK-INST: bfmop4a za1.h, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xc9,0x03,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 813e03c9 <unknown>
 
 
@@ -102,19 +104,19 @@ bfmop4a za1.h, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00111110-00000011-11001
 bfmop4s za0.h, z0.h, z16.h  // 10000001-00100000-00000000-00011000
 // CHECK-INST: bfmop4s za0.h, z0.h, z16.h
 // CHECK-ENCODING: [0x18,0x00,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81200018 <unknown>
 
 bfmop4s za1.h, z12.h, z24.h  // 10000001-00101000-00000001-10011001
 // CHECK-INST: bfmop4s za1.h, z12.h, z24.h
 // CHECK-ENCODING: [0x99,0x01,0x28,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81280199 <unknown>
 
 bfmop4s za1.h, z14.h, z30.h  // 10000001-00101110-00000001-11011001
 // CHECK-INST: bfmop4s za1.h, z14.h, z30.h
 // CHECK-ENCODING: [0xd9,0x01,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 812e01d9 <unknown>
 
 // Single and multiple vectors
@@ -122,19 +124,19 @@ bfmop4s za1.h, z14.h, z30.h  // 10000001-00101110-00000001-11011001
 bfmop4s za0.h, z0.h, {z16.h-z17.h}  // 10000001-00110000-00000000-00011000
 // CHECK-INST: bfmop4s za0.h, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x00,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81300018 <unknown>
 
 bfmop4s za1.h, z12.h, {z24.h-z25.h}  // 10000001-00111000-00000001-10011001
 // CHECK-INST: bfmop4s za1.h, z12.h, { z24.h, z25.h }
 // CHECK-ENCODING: [0x99,0x01,0x38,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81380199 <unknown>
 
 bfmop4s za1.h, z14.h, {z30.h-z31.h}  // 10000001-00111110-00000001-11011001
 // CHECK-INST: bfmop4s za1.h, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xd9,0x01,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 813e01d9 <unknown>
 
 // Multiple and single vectors
@@ -142,19 +144,19 @@ bfmop4s za1.h, z14.h, {z30.h-z31.h}  // 10000001-00111110-00000001-11011001
 bfmop4s za0.h, {z0.h-z1.h}, z16.h  // 10000001-00100000-00000010-00011000
 // CHECK-INST: bfmop4s za0.h, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x18,0x02,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81200218 <unknown>
 
 bfmop4s za1.h, {z12.h-z13.h}, z24.h  // 10000001-00101000-00000011-10011001
 // CHECK-INST: bfmop4s za1.h, { z12.h, z13.h }, z24.h
 // CHECK-ENCODING: [0x99,0x03,0x28,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81280399 <unknown>
 
 bfmop4s za1.h, {z14.h-z15.h}, z30.h  // 10000001-00101110-00000011-11011001
 // CHECK-INST: bfmop4s za1.h, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xd9,0x03,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 812e03d9 <unknown>
 
 // Multiple vectors
@@ -162,17 +164,17 @@ bfmop4s za1.h, {z14.h-z15.h}, z30.h  // 10000001-00101110-00000011-11011001
 bfmop4s za0.h, {z0.h-z1.h}, {z16.h-z17.h}  // 10000001-00110000-00000010-00011000
 // CHECK-INST: bfmop4s za0.h, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x02,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81300218 <unknown>
 
 bfmop4s za1.h, {z12.h-z13.h}, {z24.h-z25.h}  // 10000001-00111000-00000011-10011001
 // CHECK-INST: bfmop4s za1.h, { z12.h, z13.h }, { z24.h, z25.h }
 // CHECK-ENCODING: [0x99,0x03,0x38,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 81380399 <unknown>
 
 bfmop4s za1.h, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00111110-00000011-11011001
 // CHECK-INST: bfmop4s za1.h, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xd9,0x03,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-b16b16
 // CHECK-UNKNOWN: 813e03d9 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/bfmop4as-widening.s b/llvm/test/MC/AArch64/SME2p2/bfmop4as-widening.s
index 40d08e503c8bb3..b550342a71c77a 100644
--- a/llvm/test/MC/AArch64/SME2p2/bfmop4as-widening.s
+++ b/llvm/test/MC/AArch64/SME2p2/bfmop4as-widening.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -19,19 +21,19 @@
 bfmop4a za0.s, z0.h, z16.h  // 10000001-00000000-00000000-00000000
 // CHECK-INST: bfmop4a za0.s, z0.h, z16.h
 // CHECK-ENCODING: [0x00,0x00,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81000000 <unknown>
 
 bfmop4a za3.s, z14.h, z30.h  // 10000001-00001110-00000001-11000011
 // CHECK-INST: bfmop4a za3.s, z14.h, z30.h
 // CHECK-ENCODING: [0xc3,0x01,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810e01c3 <unknown>
 
 bfmop4a za1.s, z10.h, z20.h  // 10000001-00000100-00000001-01000001
 // CHECK-INST: bfmop4a za1.s, z10.h, z20.h
 // CHECK-ENCODING: [0x41,0x01,0x04,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81040141 <unknown>
 
 // Single and multiple vectors
@@ -39,19 +41,19 @@ bfmop4a za1.s, z10.h, z20.h  // 10000001-00000100-00000001-01000001
 bfmop4a za0.s, z0.h, {z16.h-z17.h}  // 10000001-00010000-00000000-00000000
 // CHECK-INST: bfmop4a za0.s, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x00,0x00,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81100000 <unknown>
 
 bfmop4a za3.s, z14.h, {z30.h-z31.h}  // 10000001-00011110-00000001-11000011
 // CHECK-INST: bfmop4a za3.s, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xc3,0x01,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811e01c3 <unknown>
 
 bfmop4a za2.s, z12.h, {z24.h-z25.h}  // 10000001-00011000-00000001-10000010
 // CHECK-INST: bfmop4a za2.s, z12.h, { z24.h, z25.h }
 // CHECK-ENCODING: [0x82,0x01,0x18,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81180182 <unknown>
 
 // Multiple and single vectors
@@ -59,19 +61,19 @@ bfmop4a za2.s, z12.h, {z24.h-z25.h}  // 10000001-00011000-00000001-10000010
 bfmop4a za0.s, {z0.h-z1.h}, z16.h  // 10000001-00000000-00000010-00000000
 // CHECK-INST: bfmop4a za0.s, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x00,0x02,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81000200 <unknown>
 
 bfmop4a za3.s, {z14.h-z15.h}, z30.h  // 10000001-00001110-00000011-11000011
 // CHECK-INST: bfmop4a za3.s, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xc3,0x03,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810e03c3 <unknown>
 
 bfmop4a za2.s, {z12.h-z13.h}, z28.h  // 10000001-00001100-00000011-10000010
 // CHECK-INST: bfmop4a za2.s, { z12.h, z13.h }, z28.h
 // CHECK-ENCODING: [0x82,0x03,0x0c,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810c0382 <unknown>
 
 // Multiple vectors
@@ -79,19 +81,19 @@ bfmop4a za2.s, {z12.h-z13.h}, z28.h  // 10000001-00001100-00000011-10000010
 bfmop4a za0.s, {z0.h-z1.h}, {z16.h-z17.h}  // 10000001-00010000-00000010-00000000
 // CHECK-INST: bfmop4a za0.s, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x00,0x02,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81100200 <unknown>
 
 bfmop4a za3.s, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00011110-00000011-11000011
 // CHECK-INST: bfmop4a za3.s, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xc3,0x03,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811e03c3 <unknown>
 
 bfmop4a za2.s, {z12.h-z13.h}, {z26.h-z27.h}  // 10000001-00011010-00000011-10000010
 // CHECK-INST: bfmop4a za2.s, { z12.h, z13.h }, { z26.h, z27.h }
 // CHECK-ENCODING: [0x82,0x03,0x1a,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811a0382 <unknown>
 
 
@@ -102,19 +104,19 @@ bfmop4a za2.s, {z12.h-z13.h}, {z26.h-z27.h}  // 10000001-00011010-00000011-10000
 bfmop4s za0.s, z0.h, z16.h  // 10000001-00000000-00000000-00010000
 // CHECK-INST: bfmop4s za0.s, z0.h, z16.h
 // CHECK-ENCODING: [0x10,0x00,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81000010 <unknown>
 
 bfmop4s za3.s, z14.h, z30.h  // 10000001-00001110-00000001-11010011
 // CHECK-INST: bfmop4s za3.s, z14.h, z30.h
 // CHECK-ENCODING: [0xd3,0x01,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810e01d3 <unknown>
 
 bfmop4s za1.s, z10.h, z20.h  // 10000001-00000100-00000001-01010001
 // CHECK-INST: bfmop4s za1.s, z10.h, z20.h
 // CHECK-ENCODING: [0x51,0x01,0x04,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81040151 <unknown>
 
 // Single and multiple vectors
@@ -122,19 +124,19 @@ bfmop4s za1.s, z10.h, z20.h  // 10000001-00000100-00000001-01010001
 bfmop4s za0.s, z0.h, {z16.h-z17.h}  // 10000001-00010000-00000000-00010000
 // CHECK-INST: bfmop4s za0.s, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x10,0x00,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81100010 <unknown>
 
 bfmop4s za3.s, z14.h, {z30.h-z31.h}  // 10000001-00011110-00000001-11010011
 // CHECK-INST: bfmop4s za3.s, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xd3,0x01,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811e01d3 <unknown>
 
 bfmop4s za2.s, z12.h, {z24.h-z25.h}  // 10000001-00011000-00000001-10010010
 // CHECK-INST: bfmop4s za2.s, z12.h, { z24.h, z25.h }
 // CHECK-ENCODING: [0x92,0x01,0x18,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81180192 <unknown>
 
 // Multiple and single vectors
@@ -142,19 +144,19 @@ bfmop4s za2.s, z12.h, {z24.h-z25.h}  // 10000001-00011000-00000001-10010010
 bfmop4s za0.s, {z0.h-z1.h}, z16.h  // 10000001-00000000-00000010-00010000
 // CHECK-INST: bfmop4s za0.s, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x10,0x02,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81000210 <unknown>
 
 bfmop4s za3.s, {z14.h-z15.h}, z30.h  // 10000001-00001110-00000011-11010011
 // CHECK-INST: bfmop4s za3.s, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xd3,0x03,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810e03d3 <unknown>
 
 bfmop4s za2.s, {z12.h-z13.h}, z28.h  // 10000001-00001100-00000011-10010010
 // CHECK-INST: bfmop4s za2.s, { z12.h, z13.h }, z28.h
 // CHECK-ENCODING: [0x92,0x03,0x0c,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810c0392 <unknown>
 
 // Multiple vectors
@@ -162,17 +164,17 @@ bfmop4s za2.s, {z12.h-z13.h}, z28.h  // 10000001-00001100-00000011-10010010
 bfmop4s za0.s, {z0.h-z1.h}, {z16.h-z17.h}  // 10000001-00010000-00000010-00010000
 // CHECK-INST: bfmop4s za0.s, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x10,0x02,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81100210 <unknown>
 
 bfmop4s za3.s, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00011110-00000011-11010011
 // CHECK-INST: bfmop4s za3.s, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xd3,0x03,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811e03d3 <unknown>
 
 bfmop4s za2.s, {z12.h-z13.h}, {z26.h-z27.h}  // 10000001-00011010-00000011-10010010
 // CHECK-INST: bfmop4s za2.s, { z12.h, z13.h }, { z26.h, z27.h }
 // CHECK-ENCODING: [0x92,0x03,0x1a,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811a0392 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/bftmopa.s b/llvm/test/MC/AArch64/SME2p2/bftmopa.s
index dc7b5456ddab33..a34779913bd949 100644
--- a/llvm/test/MC/AArch64/SME2p2/bftmopa.s
+++ b/llvm/test/MC/AArch64/SME2p2/bftmopa.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-b16b16 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-tmop,+sme-b16b16 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-b16b16 < %s \
@@ -17,19 +19,19 @@
 bftmopa za0.h, {z0.h-z1.h}, z0.h, z20[0]  // 10000001-01100000-00000000-00001000
 // CHECK-INST: bftmopa za0.h, { z0.h, z1.h }, z0.h, z20[0]
 // CHECK-ENCODING: [0x08,0x00,0x60,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-b16b16
 // CHECK-UNKNOWN: 81600008 <unknown>
 
 bftmopa za1.h, {z12.h-z13.h}, z8.h, z23[3]  // 10000001-01101000-00001101-10111001
 // CHECK-INST: bftmopa za1.h, { z12.h, z13.h }, z8.h, z23[3]
 // CHECK-ENCODING: [0xb9,0x0d,0x68,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-b16b16
 // CHECK-UNKNOWN: 81680db9 <unknown>
 
 bftmopa za1.h, {z30.h-z31.h}, z31.h, z31[3]  // 10000001-01111111-00011111-11111001
 // CHECK-INST: bftmopa za1.h, { z30.h, z31.h }, z31.h, z31[3]
 // CHECK-ENCODING: [0xf9,0x1f,0x7f,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-b16b16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-b16b16
 // CHECK-UNKNOWN: 817f1ff9 <unknown>
 
 // widening
@@ -37,17 +39,17 @@ bftmopa za1.h, {z30.h-z31.h}, z31.h, z31[3]  // 10000001-01111111-00011111-11111
 bftmopa za0.s, {z0.h-z1.h}, z0.h, z20[0]  // 10000001-01000000-00000000-00000000
 // CHECK-INST: bftmopa za0.s, { z0.h, z1.h }, z0.h, z20[0]
 // CHECK-ENCODING: [0x00,0x00,0x40,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 81400000 <unknown>
 
 bftmopa za3.s, {z12.h-z13.h}, z8.h, z23[3]  // 10000001-01001000-00001101-10110011
 // CHECK-INST: bftmopa za3.s, { z12.h, z13.h }, z8.h, z23[3]
 // CHECK-ENCODING: [0xb3,0x0d,0x48,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 81480db3 <unknown>
 
 bftmopa za3.s, {z30.h-z31.h}, z31.h, z31[3]  // 10000001-01011111-00011111-11110011
 // CHECK-INST: bftmopa za3.s, { z30.h, z31.h }, z31.h, z31[3]
 // CHECK-ENCODING: [0xf3,0x1f,0x5f,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 815f1ff3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/directive-arch.s b/llvm/test/MC/AArch64/SME2p2/directive-arch.s
index bb4e943a88478e..8f58ddcd3c4806 100644
--- a/llvm/test/MC/AArch64/SME2p2/directive-arch.s
+++ b/llvm/test/MC/AArch64/SME2p2/directive-arch.s
@@ -3,3 +3,11 @@
 .arch armv9-a+sme2p2
 ftmopa  za0.s, {z0.s-z1.s}, z0.s, z20[0]
 // CHECK: ftmopa za0.s, { z0.s, z1.s }, z0.s, z20[0]
+
+.arch armv9-a+sme-tmop
+ftmopa  za0.s, {z0.s-z1.s}, z0.s, z20[0]
+// CHECK: ftmopa za0.s, { z0.s, z1.s }, z0.s, z20[0]
+
+.arch armv9-a+sme-mop4
+bfmop4a za0.s, z0.h, z16.h
+// CHECK: bfmop4a za0.s, z0.h, z16.h
diff --git a/llvm/test/MC/AArch64/SME2p2/fmop4a-fp8-fp16-widening.s b/llvm/test/MC/AArch64/SME2p2/fmop4a-fp8-fp16-widening.s
index 96ba4188190aa5..cc54d91e8e637c 100644
--- a/llvm/test/MC/AArch64/SME2p2/fmop4a-fp8-fp16-widening.s
+++ b/llvm/test/MC/AArch64/SME2p2/fmop4a-fp8-fp16-widening.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-f8f16 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-f8f16 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-f8f16 < %s \
@@ -17,19 +19,19 @@
 fmop4a  za0.h, z0.b, z16.b  // 10000000-00100000-00000000-00001000
 // CHECK-INST: fmop4a  za0.h, z0.b, z16.b
 // CHECK-ENCODING: [0x08,0x00,0x20,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 80200008 <unknown>
 
 fmop4a  za1.h, z12.b, z24.b  // 10000000-00101000-00000001-10001001
 // CHECK-INST: fmop4a  za1.h, z12.b, z24.b
 // CHECK-ENCODING: [0x89,0x01,0x28,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 80280189 <unknown>
 
 fmop4a  za1.h, z14.b, z30.b  // 10000000-00101110-00000001-11001001
 // CHECK-INST: fmop4a  za1.h, z14.b, z30.b
 // CHECK-ENCODING: [0xc9,0x01,0x2e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 802e01c9 <unknown>
 
 // Single and multiple vectors
@@ -37,19 +39,19 @@ fmop4a  za1.h, z14.b, z30.b  // 10000000-00101110-00000001-11001001
 fmop4a  za0.h, z0.b, {z16.b-z17.b}  // 10000000-00110000-00000000-00001000
 // CHECK-INST: fmop4a  za0.h, z0.b, { z16.b, z17.b }
 // CHECK-ENCODING: [0x08,0x00,0x30,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 80300008 <unknown>
 
 fmop4a  za1.h, z10.b, {z20.b-z21.b}  // 10000000-00110100-00000001-01001001
 // CHECK-INST: fmop4a  za1.h, z10.b, { z20.b, z21.b }
 // CHECK-ENCODING: [0x49,0x01,0x34,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 80340149 <unknown>
 
 fmop4a  za1.h, z14.b, {z30.b-z31.b}  // 10000000-00111110-00000001-11001001
 // CHECK-INST: fmop4a  za1.h, z14.b, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc9,0x01,0x3e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 803e01c9 <unknown>
 
 // Multiple and single vectors
@@ -57,19 +59,19 @@ fmop4a  za1.h, z14.b, {z30.b-z31.b}  // 10000000-00111110-00000001-11001001
 fmop4a  za0.h, {z0.b-z1.b}, z16.b  // 10000000-00100000-00000010-00001000
 // CHECK-INST: fmop4a  za0.h, { z0.b, z1.b }, z16.b
 // CHECK-ENCODING: [0x08,0x02,0x20,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 80200208 <unknown>
 
 fmop4a  za1.h, {z10.b-z11.b}, z20.b  // 10000000-00100100-00000011-01001001
 // CHECK-INST: fmop4a  za1.h, { z10.b, z11.b }, z20.b
 // CHECK-ENCODING: [0x49,0x03,0x24,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 80240349 <unknown>
 
 fmop4a  za1.h, {z14.b-z15.b}, z30.b  // 10000000-00101110-00000011-11001001
 // CHECK-INST: fmop4a  za1.h, { z14.b, z15.b }, z30.b
 // CHECK-ENCODING: [0xc9,0x03,0x2e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 802e03c9 <unknown>
 
 
@@ -78,18 +80,18 @@ fmop4a  za1.h, {z14.b-z15.b}, z30.b  // 10000000-00101110-00000011-11001001
 fmop4a  za0.h, {z0.b-z1.b}, {z16.b-z17.b}  // 10000000-00110000-00000010-00001000
 // CHECK-INST: fmop4a  za0.h, { z0.b, z1.b }, { z16.b, z17.b }
 // CHECK-ENCODING: [0x08,0x02,0x30,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 80300208 <unknown>
 
 fmop4a  za1.h, {z10.b-z11.b}, {z20.b-z21.b}  // 10000000-00110100-00000011-01001001
 // CHECK-INST: fmop4a  za1.h, { z10.b, z11.b }, { z20.b, z21.b }
 // CHECK-ENCODING: [0x49,0x03,0x34,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 80340349 <unknown>
 
 fmop4a  za1.h, {z14.b-z15.b}, {z30.b-z31.b}  // 10000000-00111110-00000011-11001001
 // CHECK-INST: fmop4a  za1.h, { z14.b, z15.b }, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc9,0x03,0x3e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f16
 // CHECK-UNKNOWN: 803e03c9 <unknown>
 
diff --git a/llvm/test/MC/AArch64/SME2p2/fmop4a-fp8-fp32-widening.s b/llvm/test/MC/AArch64/SME2p2/fmop4a-fp8-fp32-widening.s
index 9e378bcf3d7533..9f1a02d15e7d42 100644
--- a/llvm/test/MC/AArch64/SME2p2/fmop4a-fp8-fp32-widening.s
+++ b/llvm/test/MC/AArch64/SME2p2/fmop4a-fp8-fp32-widening.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-f8f32 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-f8f32 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-f8f32 < %s \
@@ -17,19 +19,19 @@
 fmop4a  za0.s, z0.b, z16.b  // 10000000-00100000-00000000-00000000
 // CHECK-INST: fmop4a  za0.s, z0.b, z16.b
 // CHECK-ENCODING: [0x00,0x00,0x20,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 80200000 <unknown>
 
 fmop4a  za1.s, z10.b, z20.b  // 10000000-00100100-00000001-01000001
 // CHECK-INST: fmop4a  za1.s, z10.b, z20.b
 // CHECK-ENCODING: [0x41,0x01,0x24,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 80240141 <unknown>
 
 fmop4a  za3.s, z14.b, z30.b  // 10000000-00101110-00000001-11000011
 // CHECK-INST: fmop4a  za3.s, z14.b, z30.b
 // CHECK-ENCODING: [0xc3,0x01,0x2e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 802e01c3 <unknown>
 
 // Single and multiple vectors
@@ -37,19 +39,19 @@ fmop4a  za3.s, z14.b, z30.b  // 10000000-00101110-00000001-11000011
 fmop4a  za0.s, z0.b, {z16.b-z17.b}  // 10000000-00110000-00000000-00000000
 // CHECK-INST: fmop4a  za0.s, z0.b, { z16.b, z17.b }
 // CHECK-ENCODING: [0x00,0x00,0x30,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 80300000 <unknown>
 
 fmop4a  za1.s, z10.b, {z20.b-z21.b}  // 10000000-00110100-00000001-01000001
 // CHECK-INST: fmop4a  za1.s, z10.b, { z20.b, z21.b }
 // CHECK-ENCODING: [0x41,0x01,0x34,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 80340141 <unknown>
 
 fmop4a  za3.s, z14.b, {z30.b-z31.b}  // 10000000-00111110-00000001-11000011
 // CHECK-INST: fmop4a  za3.s, z14.b, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc3,0x01,0x3e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 803e01c3 <unknown>
 
 // Multiple and single vectors
@@ -57,19 +59,19 @@ fmop4a  za3.s, z14.b, {z30.b-z31.b}  // 10000000-00111110-00000001-11000011
 fmop4a  za0.s, {z0.b-z1.b}, z16.b  // 10000000-00100000-00000010-00000000
 // CHECK-INST: fmop4a  za0.s, { z0.b, z1.b }, z16.b
 // CHECK-ENCODING: [0x00,0x02,0x20,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 80200200 <unknown>
 
 fmop4a  za1.s, {z10.b-z11.b}, z20.b  // 10000000-00100100-00000011-01000001
 // CHECK-INST: fmop4a  za1.s, { z10.b, z11.b }, z20.b
 // CHECK-ENCODING: [0x41,0x03,0x24,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 80240341 <unknown>
 
 fmop4a  za3.s, {z14.b-z15.b}, z30.b  // 10000000-00101110-00000011-11000011
 // CHECK-INST: fmop4a  za3.s, { z14.b, z15.b }, z30.b
 // CHECK-ENCODING: [0xc3,0x03,0x2e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 802e03c3 <unknown>
 
 // Multiple vectors
@@ -77,17 +79,17 @@ fmop4a  za3.s, {z14.b-z15.b}, z30.b  // 10000000-00101110-00000011-11000011
 fmop4a  za0.s, {z0.b-z1.b}, {z16.b-z17.b}  // 10000000-00110000-00000010-00000000
 // CHECK-INST: fmop4a  za0.s, { z0.b, z1.b }, { z16.b, z17.b }
 // CHECK-ENCODING: [0x00,0x02,0x30,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 80300200 <unknown>
 
 fmop4a  za1.s, {z10.b-z11.b}, {z20.b-z21.b}  // 10000000-00110100-00000011-01000001
 // CHECK-INST: fmop4a  za1.s, { z10.b, z11.b }, { z20.b, z21.b }
 // CHECK-ENCODING: [0x41,0x03,0x34,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 80340341 <unknown>
 
 fmop4a  za3.s, {z14.b-z15.b}, {z30.b-z31.b}  // 10000000-00111110-00000011-11000011
 // CHECK-INST: fmop4a  za3.s, { z14.b, z15.b }, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc3,0x03,0x3e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f8f32
 // CHECK-UNKNOWN: 803e03c3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/fmop4as-fp16-fp32-widening.s b/llvm/test/MC/AArch64/SME2p2/fmop4as-fp16-fp32-widening.s
index d615fb85b4fd7e..775bed1a86ab79 100644
--- a/llvm/test/MC/AArch64/SME2p2/fmop4as-fp16-fp32-widening.s
+++ b/llvm/test/MC/AArch64/SME2p2/fmop4as-fp16-fp32-widening.s
@@ -1,6 +1,8 @@
 
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -20,19 +22,19 @@
 fmop4a  za0.s, z0.h, z16.h  // 10000001-00100000-00000000-00000000
 // CHECK-INST: fmop4a  za0.s, z0.h, z16.h
 // CHECK-ENCODING: [0x00,0x00,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81200000 <unknown>
 
 fmop4a  za1.s, z10.h, z20.h  // 10000001-00100100-00000001-01000001
 // CHECK-INST: fmop4a  za1.s, z10.h, z20.h
 // CHECK-ENCODING: [0x41,0x01,0x24,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81240141 <unknown>
 
 fmop4a  za3.s, z14.h, z30.h  // 10000001-00101110-00000001-11000011
 // CHECK-INST: fmop4a  za3.s, z14.h, z30.h
 // CHECK-ENCODING: [0xc3,0x01,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 812e01c3 <unknown>
 
 // Single and multiple vectors
@@ -40,19 +42,19 @@ fmop4a  za3.s, z14.h, z30.h  // 10000001-00101110-00000001-11000011
 fmop4a  za0.s, z0.h, {z16.h-z17.h}  // 10000001-00110000-00000000-00000000
 // CHECK-INST: fmop4a  za0.s, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x00,0x00,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81300000 <unknown>
 
 fmop4a  za1.s, z10.h, {z20.h-z21.h}  // 10000001-00110100-00000001-01000001
 // CHECK-INST: fmop4a  za1.s, z10.h, { z20.h, z21.h }
 // CHECK-ENCODING: [0x41,0x01,0x34,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81340141 <unknown>
 
 fmop4a  za3.s, z14.h, {z30.h-z31.h}  // 10000001-00111110-00000001-11000011
 // CHECK-INST: fmop4a  za3.s, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xc3,0x01,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 813e01c3 <unknown>
 
 // Multiple and single vectors
@@ -60,19 +62,19 @@ fmop4a  za3.s, z14.h, {z30.h-z31.h}  // 10000001-00111110-00000001-11000011
 fmop4a  za0.s, {z0.h-z1.h}, z16.h  // 10000001-00100000-00000010-00000000
 // CHECK-INST: fmop4a  za0.s, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x00,0x02,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81200200 <unknown>
 
 fmop4a  za1.s, {z10.h-z11.h}, z20.h  // 10000001-00100100-00000011-01000001
 // CHECK-INST: fmop4a  za1.s, { z10.h, z11.h }, z20.h
 // CHECK-ENCODING: [0x41,0x03,0x24,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81240341 <unknown>
 
 fmop4a  za3.s, {z14.h-z15.h}, z30.h  // 10000001-00101110-00000011-11000011
 // CHECK-INST: fmop4a  za3.s, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xc3,0x03,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 812e03c3 <unknown>
 
 // Multiple vectors
@@ -80,19 +82,19 @@ fmop4a  za3.s, {z14.h-z15.h}, z30.h  // 10000001-00101110-00000011-11000011
 fmop4a  za0.s, {z0.h-z1.h}, {z16.h-z17.h}  // 10000001-00110000-00000010-00000000
 // CHECK-INST: fmop4a  za0.s, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x00,0x02,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81300200 <unknown>
 
 fmop4a  za1.s, {z10.h-z11.h}, {z20.h-z21.h}  // 10000001-00110100-00000011-01000001
 // CHECK-INST: fmop4a  za1.s, { z10.h, z11.h }, { z20.h, z21.h }
 // CHECK-ENCODING: [0x41,0x03,0x34,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81340341 <unknown>
 
 fmop4a  za3.s, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00111110-00000011-11000011
 // CHECK-INST: fmop4a  za3.s, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xc3,0x03,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 813e03c3 <unknown>
 
 // FMOP4S
@@ -101,19 +103,19 @@ fmop4a  za3.s, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00111110-00000011-11000
 fmop4s  za0.s, z0.h, z16.h  // 10000001-00100000-00000000-00010000
 // CHECK-INST: fmop4s  za0.s, z0.h, z16.h
 // CHECK-ENCODING: [0x10,0x00,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81200010 <unknown>
 
 fmop4s  za1.s, z10.h, z20.h  // 10000001-00100100-00000001-01010001
 // CHECK-INST: fmop4s  za1.s, z10.h, z20.h
 // CHECK-ENCODING: [0x51,0x01,0x24,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81240151 <unknown>
 
 fmop4s  za3.s, z14.h, z30.h  // 10000001-00101110-00000001-11010011
 // CHECK-INST: fmop4s  za3.s, z14.h, z30.h
 // CHECK-ENCODING: [0xd3,0x01,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 812e01d3 <unknown>
 
 // Single and multiple vectors
@@ -121,19 +123,19 @@ fmop4s  za3.s, z14.h, z30.h  // 10000001-00101110-00000001-11010011
 fmop4s  za0.s, z0.h, {z16.h-z17.h}  // 10000001-00110000-00000000-00010000
 // CHECK-INST: fmop4s  za0.s, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x10,0x00,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81300010 <unknown>
 
 fmop4s  za1.s, z10.h, {z20.h-z21.h}  // 10000001-00110100-00000001-01010001
 // CHECK-INST: fmop4s  za1.s, z10.h, { z20.h, z21.h }
 // CHECK-ENCODING: [0x51,0x01,0x34,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81340151 <unknown>
 
 fmop4s  za3.s, z14.h, {z30.h-z31.h}  // 10000001-00111110-00000001-11010011
 // CHECK-INST: fmop4s  za3.s, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xd3,0x01,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 813e01d3 <unknown>
 
 // Multiple and single vectors
@@ -141,19 +143,19 @@ fmop4s  za3.s, z14.h, {z30.h-z31.h}  // 10000001-00111110-00000001-11010011
 fmop4s  za0.s, {z0.h-z1.h}, z16.h  // 10000001-00100000-00000010-00010000
 // CHECK-INST: fmop4s  za0.s, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x10,0x02,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81200210 <unknown>
 
 fmop4s  za1.s, {z10.h-z11.h}, z20.h  // 10000001-00100100-00000011-01010001
 // CHECK-INST: fmop4s  za1.s, { z10.h, z11.h }, z20.h
 // CHECK-ENCODING: [0x51,0x03,0x24,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81240351 <unknown>
 
 fmop4s  za3.s, {z14.h-z15.h}, z30.h  // 10000001-00101110-00000011-11010011
 // CHECK-INST: fmop4s  za3.s, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xd3,0x03,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 812e03d3 <unknown>
 
 // Multiple vectors
@@ -161,17 +163,17 @@ fmop4s  za3.s, {z14.h-z15.h}, z30.h  // 10000001-00101110-00000011-11010011
 fmop4s  za0.s, {z0.h-z1.h}, {z16.h-z17.h}  // 10000001-00110000-00000010-00010000
 // CHECK-INST: fmop4s  za0.s, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x10,0x02,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81300210 <unknown>
 
 fmop4s  za1.s, {z10.h-z11.h}, {z20.h-z21.h}  // 10000001-00110100-00000011-01010001
 // CHECK-INST: fmop4s  za1.s, { z10.h, z11.h }, { z20.h, z21.h }
 // CHECK-ENCODING: [0x51,0x03,0x34,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81340351 <unknown>
 
 fmop4s  za3.s, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00111110-00000011-11010011
 // CHECK-INST: fmop4s  za3.s, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xd3,0x03,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 813e03d3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/fmop4as-fp16-non-widening.s b/llvm/test/MC/AArch64/SME2p2/fmop4as-fp16-non-widening.s
index 2a94acd35e95c3..4a889010868bf1 100644
--- a/llvm/test/MC/AArch64/SME2p2/fmop4as-fp16-non-widening.s
+++ b/llvm/test/MC/AArch64/SME2p2/fmop4as-fp16-non-widening.s
@@ -1,6 +1,8 @@
 
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-f16f16 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-f16f16 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-f16f16 < %s \
@@ -21,19 +23,19 @@
 fmop4a  za0.h, z0.h, z16.h  // 10000001-00000000-00000000-00001000
 // CHECK-INST: fmop4a  za0.h, z0.h, z16.h
 // CHECK-ENCODING: [0x08,0x00,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81000008 <unknown>
 
 fmop4a  za1.h, z12.h, z24.h  // 10000001-00001000-00000001-10001001
 // CHECK-INST: fmop4a  za1.h, z12.h, z24.h
 // CHECK-ENCODING: [0x89,0x01,0x08,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81080189 <unknown>
 
 fmop4a  za1.h, z14.h, z30.h  // 10000001-00001110-00000001-11001001
 // CHECK-INST: fmop4a  za1.h, z14.h, z30.h
 // CHECK-ENCODING: [0xc9,0x01,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 810e01c9 <unknown>
 
 // Single and multiple vectors
@@ -41,19 +43,19 @@ fmop4a  za1.h, z14.h, z30.h  // 10000001-00001110-00000001-11001001
 fmop4a  za0.h, z0.h, {z16.h-z17.h}  // 10000001-00010000-00000000-00001000
 // CHECK-INST: fmop4a  za0.h, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x00,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81100008 <unknown>
 
 fmop4a  za1.h, z12.h, {z24.h-z25.h}  // 10000001-00011000-00000001-10001001
 // CHECK-INST: fmop4a  za1.h, z12.h, { z24.h, z25.h }
 // CHECK-ENCODING: [0x89,0x01,0x18,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81180189 <unknown>
 
 fmop4a  za1.h, z14.h, {z30.h-z31.h}  // 10000001-00011110-00000001-11001001
 // CHECK-INST: fmop4a  za1.h, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xc9,0x01,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 811e01c9 <unknown>
 
 // Multiple and single vectors
@@ -61,19 +63,19 @@ fmop4a  za1.h, z14.h, {z30.h-z31.h}  // 10000001-00011110-00000001-11001001
 fmop4a  za0.h, {z0.h-z1.h}, z16.h  // 10000001-00000000-00000010-00001000
 // CHECK-INST: fmop4a  za0.h, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x08,0x02,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81000208 <unknown>
 
 fmop4a  za1.h, {z12.h-z13.h}, z24.h  // 10000001-00001000-00000011-10001001
 // CHECK-INST: fmop4a  za1.h, { z12.h, z13.h }, z24.h
 // CHECK-ENCODING: [0x89,0x03,0x08,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81080389 <unknown>
 
 fmop4a  za1.h, {z14.h-z15.h}, z30.h  // 10000001-00001110-00000011-11001001
 // CHECK-INST: fmop4a  za1.h, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xc9,0x03,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 810e03c9 <unknown>
 
 // Multiple vectors
@@ -81,19 +83,19 @@ fmop4a  za1.h, {z14.h-z15.h}, z30.h  // 10000001-00001110-00000011-11001001
 fmop4a  za0.h, {z0.h-z1.h}, {z16.h-z17.h}  // 10000001-00010000-00000010-00001000
 // CHECK-INST: fmop4a  za0.h, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x02,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81100208 <unknown>
 
 fmop4a  za1.h, {z12.h-z13.h}, {z24.h-z25.h}  // 10000001-00011000-00000011-10001001
 // CHECK-INST: fmop4a  za1.h, { z12.h, z13.h }, { z24.h, z25.h }
 // CHECK-ENCODING: [0x89,0x03,0x18,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81180389 <unknown>
 
 fmop4a  za1.h, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00011110-00000011-11001001
 // CHECK-INST: fmop4a  za1.h, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xc9,0x03,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 811e03c9 <unknown>
 
 // FMOP4S
@@ -103,19 +105,19 @@ fmop4a  za1.h, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00011110-00000011-11001
 fmop4s  za0.h, z0.h, z16.h  // 10000001-00000000-00000000-00011000
 // CHECK-INST: fmop4s  za0.h, z0.h, z16.h
 // CHECK-ENCODING: [0x18,0x00,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81000018 <unknown>
 
 fmop4s  za1.h, z12.h, z24.h  // 10000001-00001000-00000001-10011001
 // CHECK-INST: fmop4s  za1.h, z12.h, z24.h
 // CHECK-ENCODING: [0x99,0x01,0x08,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81080199 <unknown>
 
 fmop4s  za1.h, z14.h, z30.h  // 10000001-00001110-00000001-11011001
 // CHECK-INST: fmop4s  za1.h, z14.h, z30.h
 // CHECK-ENCODING: [0xd9,0x01,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 810e01d9 <unknown>
 
 // Single and multiple vectors
@@ -123,19 +125,19 @@ fmop4s  za1.h, z14.h, z30.h  // 10000001-00001110-00000001-11011001
 fmop4s  za0.h, z0.h, {z16.h-z17.h}  // 10000001-00010000-00000000-00011000
 // CHECK-INST: fmop4s  za0.h, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x00,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81100018 <unknown>
 
 fmop4s  za1.h, z12.h, {z24.h-z25.h}  // 10000001-00011000-00000001-10011001
 // CHECK-INST: fmop4s  za1.h, z12.h, { z24.h, z25.h }
 // CHECK-ENCODING: [0x99,0x01,0x18,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81180199 <unknown>
 
 fmop4s  za1.h, z14.h, {z30.h-z31.h}  // 10000001-00011110-00000001-11011001
 // CHECK-INST: fmop4s  za1.h, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xd9,0x01,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 811e01d9 <unknown>
 
 // Multiple and single vectors
@@ -143,19 +145,19 @@ fmop4s  za1.h, z14.h, {z30.h-z31.h}  // 10000001-00011110-00000001-11011001
 fmop4s  za0.h, {z0.h-z1.h}, z16.h  // 10000001-00000000-00000010-00011000
 // CHECK-INST: fmop4s  za0.h, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x18,0x02,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81000218 <unknown>
 
 fmop4s  za1.h, {z12.h-z13.h}, z24.h  // 10000001-00001000-00000011-10011001
 // CHECK-INST: fmop4s  za1.h, { z12.h, z13.h }, z24.h
 // CHECK-ENCODING: [0x99,0x03,0x08,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81080399 <unknown>
 
 fmop4s  za1.h, {z14.h-z15.h}, z30.h  // 10000001-00001110-00000011-11011001
 // CHECK-INST: fmop4s  za1.h, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xd9,0x03,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 810e03d9 <unknown>
 
 // Multiple vectors
@@ -163,17 +165,17 @@ fmop4s  za1.h, {z14.h-z15.h}, z30.h  // 10000001-00001110-00000011-11011001
 fmop4s  za0.h, {z0.h-z1.h}, {z16.h-z17.h}  // 10000001-00010000-00000010-00011000
 // CHECK-INST: fmop4s  za0.h, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x02,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81100218 <unknown>
 
 fmop4s  za1.h, {z12.h-z13.h}, {z24.h-z25.h}  // 10000001-00011000-00000011-10011001
 // CHECK-INST: fmop4s  za1.h, { z12.h, z13.h }, { z24.h, z25.h }
 // CHECK-ENCODING: [0x99,0x03,0x18,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 81180399 <unknown>
 
 fmop4s  za1.h, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00011110-00000011-11011001
 // CHECK-INST: fmop4s  za1.h, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xd9,0x03,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f16f16
 // CHECK-UNKNOWN: 811e03d9 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/fmop4as-fp32-non-widening.s b/llvm/test/MC/AArch64/SME2p2/fmop4as-fp32-non-widening.s
index e65def17cd1b3d..5eca45b6882c63 100644
--- a/llvm/test/MC/AArch64/SME2p2/fmop4as-fp32-non-widening.s
+++ b/llvm/test/MC/AArch64/SME2p2/fmop4as-fp32-non-widening.s
@@ -1,6 +1,8 @@
 
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -21,19 +23,19 @@
 fmop4a  za0.s, z0.s, z16.s  // 10000000-00000000-00000000-00000000
 // CHECK-INST: fmop4a  za0.s, z0.s, z16.s
 // CHECK-ENCODING: [0x00,0x00,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80000000 <unknown>
 
 fmop4a  za3.s, z12.s, z24.s  // 10000000-00001000-00000001-10000011
 // CHECK-INST: fmop4a  za3.s, z12.s, z24.s
 // CHECK-ENCODING: [0x83,0x01,0x08,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80080183 <unknown>
 
 fmop4a  za3.s, z14.s, z30.s  // 10000000-00001110-00000001-11000011
 // CHECK-INST: fmop4a  za3.s, z14.s, z30.s
 // CHECK-ENCODING: [0xc3,0x01,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e01c3 <unknown>
 
 // Single and multiple vectors
@@ -41,19 +43,19 @@ fmop4a  za3.s, z14.s, z30.s  // 10000000-00001110-00000001-11000011
 fmop4a  za0.s, z0.s, {z16.s-z17.s}  // 10000000-00010000-00000000-00000000
 // CHECK-INST: fmop4a  za0.s, z0.s, { z16.s, z17.s }
 // CHECK-ENCODING: [0x00,0x00,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80100000 <unknown>
 
 fmop4a  za1.s, z10.s, {z20.s-z21.s}  // 10000000-00010100-00000001-01000001
 // CHECK-INST: fmop4a  za1.s, z10.s, { z20.s, z21.s }
 // CHECK-ENCODING: [0x41,0x01,0x14,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80140141 <unknown>
 
 fmop4a  za3.s, z14.s, {z30.s-z31.s}  // 10000000-00011110-00000001-11000011
 // CHECK-INST: fmop4a  za3.s, z14.s, { z30.s, z31.s }
 // CHECK-ENCODING: [0xc3,0x01,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e01c3 <unknown>
 
 // Multiple and single vectors
@@ -61,19 +63,19 @@ fmop4a  za3.s, z14.s, {z30.s-z31.s}  // 10000000-00011110-00000001-11000011
 fmop4a  za0.s, {z0.s-z1.s}, z16.s  // 10000000-00000000-00000010-00000000
 // CHECK-INST: fmop4a  za0.s, { z0.s, z1.s }, z16.s
 // CHECK-ENCODING: [0x00,0x02,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80000200 <unknown>
 
 fmop4a  za1.s, {z10.s-z11.s}, z20.s  // 10000000-00000100-00000011-01000001
 // CHECK-INST: fmop4a  za1.s, { z10.s, z11.s }, z20.s
 // CHECK-ENCODING: [0x41,0x03,0x04,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80040341 <unknown>
 
 fmop4a  za3.s, {z14.s-z15.s}, z30.s  // 10000000-00001110-00000011-11000011
 // CHECK-INST: fmop4a  za3.s, { z14.s, z15.s }, z30.s
 // CHECK-ENCODING: [0xc3,0x03,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e03c3 <unknown>
 
 // Multiple vectors
@@ -81,19 +83,19 @@ fmop4a  za3.s, {z14.s-z15.s}, z30.s  // 10000000-00001110-00000011-11000011
 fmop4a  za0.s, {z0.s-z1.s}, {z16.s-z17.s}  // 10000000-00010000-00000010-00000000
 // CHECK-INST: fmop4a  za0.s, { z0.s, z1.s }, { z16.s, z17.s }
 // CHECK-ENCODING: [0x00,0x02,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80100200 <unknown>
 
 fmop4a  za1.s, {z10.s-z11.s}, {z20.s-z21.s}  // 10000000-00010100-00000011-01000001
 // CHECK-INST: fmop4a  za1.s, { z10.s, z11.s }, { z20.s, z21.s }
 // CHECK-ENCODING: [0x41,0x03,0x14,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80140341 <unknown>
 
 fmop4a  za3.s, {z14.s-z15.s}, {z30.s-z31.s}  // 10000000-00011110-00000011-11000011
 // CHECK-INST: fmop4a  za3.s, { z14.s, z15.s }, { z30.s, z31.s }
 // CHECK-ENCODING: [0xc3,0x03,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e03c3 <unknown>
 
 // FMOP4S
@@ -103,19 +105,19 @@ fmop4a  za3.s, {z14.s-z15.s}, {z30.s-z31.s}  // 10000000-00011110-00000011-11000
 fmop4s  za0.s, z0.s, z16.s  // 10000000-00000000-00000000-00010000
 // CHECK-INST: fmop4s  za0.s, z0.s, z16.s
 // CHECK-ENCODING: [0x10,0x00,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80000010 <unknown>
 
 fmop4s  za3.s, z12.s, z24.s  // 10000000-00001000-00000001-10010011
 // CHECK-INST: fmop4s  za3.s, z12.s, z24.s
 // CHECK-ENCODING: [0x93,0x01,0x08,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80080193 <unknown>
 
 fmop4s  za3.s, z14.s, z30.s  // 10000000-00001110-00000001-11010011
 // CHECK-INST: fmop4s  za3.s, z14.s, z30.s
 // CHECK-ENCODING: [0xd3,0x01,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e01d3 <unknown>
 
 // Single and multiple vectors
@@ -123,19 +125,19 @@ fmop4s  za3.s, z14.s, z30.s  // 10000000-00001110-00000001-11010011
 fmop4s  za0.s, z0.s, {z16.s-z17.s}  // 10000000-00010000-00000000-00010000
 // CHECK-INST: fmop4s  za0.s, z0.s, { z16.s, z17.s }
 // CHECK-ENCODING: [0x10,0x00,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80100010 <unknown>
 
 fmop4s  za1.s, z10.s, {z20.s-z21.s}  // 10000000-00010100-00000001-01010001
 // CHECK-INST: fmop4s  za1.s, z10.s, { z20.s, z21.s }
 // CHECK-ENCODING: [0x51,0x01,0x14,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80140151 <unknown>
 
 fmop4s  za3.s, z14.s, {z30.s-z31.s}  // 10000000-00011110-00000001-11010011
 // CHECK-INST: fmop4s  za3.s, z14.s, { z30.s, z31.s }
 // CHECK-ENCODING: [0xd3,0x01,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e01d3 <unknown>
 
 // Multiple and single vectors
@@ -143,19 +145,19 @@ fmop4s  za3.s, z14.s, {z30.s-z31.s}  // 10000000-00011110-00000001-11010011
 fmop4s  za0.s, {z0.s-z1.s}, z16.s  // 10000000-00000000-00000010-00010000
 // CHECK-INST: fmop4s  za0.s, { z0.s, z1.s }, z16.s
 // CHECK-ENCODING: [0x10,0x02,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80000210 <unknown>
 
 fmop4s  za1.s, {z10.s-z11.s}, z20.s  // 10000000-00000100-00000011-01010001
 // CHECK-INST: fmop4s  za1.s, { z10.s, z11.s }, z20.s
 // CHECK-ENCODING: [0x51,0x03,0x04,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80040351 <unknown>
 
 fmop4s  za3.s, {z14.s-z15.s}, z30.s  // 10000000-00001110-00000011-11010011
 // CHECK-INST: fmop4s  za3.s, { z14.s, z15.s }, z30.s
 // CHECK-ENCODING: [0xd3,0x03,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e03d3 <unknown>
 
 // Multiple vectors
@@ -163,17 +165,17 @@ fmop4s  za3.s, {z14.s-z15.s}, z30.s  // 10000000-00001110-00000011-11010011
 fmop4s  za0.s, {z0.s-z1.s}, {z16.s-z17.s}  // 10000000-00010000-00000010-00010000
 // CHECK-INST: fmop4s  za0.s, { z0.s, z1.s }, { z16.s, z17.s }
 // CHECK-ENCODING: [0x10,0x02,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80100210 <unknown>
 
 fmop4s  za1.s, {z10.s-z11.s}, {z20.s-z21.s}  // 10000000-00010100-00000011-01010001
 // CHECK-INST: fmop4s  za1.s, { z10.s, z11.s }, { z20.s, z21.s }
 // CHECK-ENCODING: [0x51,0x03,0x14,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80140351 <unknown>
 
 fmop4s  za3.s, {z14.s-z15.s}, {z30.s-z31.s}  // 10000000-00011110-00000011-11010011
 // CHECK-INST: fmop4s  za3.s, { z14.s, z15.s }, { z30.s, z31.s }
 // CHECK-ENCODING: [0xd3,0x03,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e03d3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/fmop4as-fp64-non-widening.s b/llvm/test/MC/AArch64/SME2p2/fmop4as-fp64-non-widening.s
index b0ad2984ad5acd..05face3174cdb9 100644
--- a/llvm/test/MC/AArch64/SME2p2/fmop4as-fp64-non-widening.s
+++ b/llvm/test/MC/AArch64/SME2p2/fmop4as-fp64-non-widening.s
@@ -1,6 +1,8 @@
 
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-f64f64 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-f64f64 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-f64f64 < %s \
@@ -21,19 +23,19 @@
 fmop4a  za0.d, z0.d, z16.d  // 10000000-11000000-00000000-00001000
 // CHECK-INST: fmop4a  za0.d, z0.d, z16.d
 // CHECK-ENCODING: [0x08,0x00,0xc0,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80c00008 <unknown>
 
 fmop4a  za5.d, z10.d, z20.d  // 10000000-11000100-00000001-01001101
 // CHECK-INST: fmop4a  za5.d, z10.d, z20.d
 // CHECK-ENCODING: [0x4d,0x01,0xc4,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80c4014d <unknown>
 
 fmop4a  za7.d, z14.d, z30.d  // 10000000-11001110-00000001-11001111
 // CHECK-INST: fmop4a  za7.d, z14.d, z30.d
 // CHECK-ENCODING: [0xcf,0x01,0xce,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80ce01cf <unknown>
 
 // Single and multiple vectors
@@ -41,19 +43,19 @@ fmop4a  za7.d, z14.d, z30.d  // 10000000-11001110-00000001-11001111
 fmop4a  za0.d, z0.d, {z16.d-z17.d}  // 10000000-11010000-00000000-00001000
 // CHECK-INST: fmop4a  za0.d, z0.d, { z16.d, z17.d }
 // CHECK-ENCODING: [0x08,0x00,0xd0,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80d00008 <unknown>
 
 fmop4a  za5.d, z10.d, {z20.d-z21.d}  // 10000000-11010100-00000001-01001101
 // CHECK-INST: fmop4a  za5.d, z10.d, { z20.d, z21.d }
 // CHECK-ENCODING: [0x4d,0x01,0xd4,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80d4014d <unknown>
 
 fmop4a  za7.d, z14.d, {z30.d-z31.d}  // 10000000-11011110-00000001-11001111
 // CHECK-INST: fmop4a  za7.d, z14.d, { z30.d, z31.d }
 // CHECK-ENCODING: [0xcf,0x01,0xde,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80de01cf <unknown>
 
 // Multiple and single vectors
@@ -61,19 +63,19 @@ fmop4a  za7.d, z14.d, {z30.d-z31.d}  // 10000000-11011110-00000001-11001111
 fmop4a  za0.d, {z0.d-z1.d}, z16.d  // 10000000-11000000-00000010-00001000
 // CHECK-INST: fmop4a  za0.d, { z0.d, z1.d }, z16.d
 // CHECK-ENCODING: [0x08,0x02,0xc0,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80c00208 <unknown>
 
 fmop4a  za5.d, {z10.d-z11.d}, z20.d  // 10000000-11000100-00000011-01001101
 // CHECK-INST: fmop4a  za5.d, { z10.d, z11.d }, z20.d
 // CHECK-ENCODING: [0x4d,0x03,0xc4,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80c4034d <unknown>
 
 fmop4a  za7.d, {z14.d-z15.d}, z30.d  // 10000000-11001110-00000011-11001111
 // CHECK-INST: fmop4a  za7.d, { z14.d, z15.d }, z30.d
 // CHECK-ENCODING: [0xcf,0x03,0xce,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80ce03cf <unknown>
 
 // Multiple vectors
@@ -81,19 +83,19 @@ fmop4a  za7.d, {z14.d-z15.d}, z30.d  // 10000000-11001110-00000011-11001111
 fmop4a  za0.d, {z0.d-z1.d}, {z16.d-z17.d}  // 10000000-11010000-00000010-00001000
 // CHECK-INST: fmop4a  za0.d, { z0.d, z1.d }, { z16.d, z17.d }
 // CHECK-ENCODING: [0x08,0x02,0xd0,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80d00208 <unknown>
 
 fmop4a  za5.d, {z10.d-z11.d}, {z20.d-z21.d}  // 10000000-11010100-00000011-01001101
 // CHECK-INST: fmop4a  za5.d, { z10.d, z11.d }, { z20.d, z21.d }
 // CHECK-ENCODING: [0x4d,0x03,0xd4,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80d4034d <unknown>
 
 fmop4a  za7.d, {z14.d-z15.d}, {z30.d-z31.d}  // 10000000-11011110-00000011-11001111
 // CHECK-INST: fmop4a  za7.d, { z14.d, z15.d }, { z30.d, z31.d }
 // CHECK-ENCODING: [0xcf,0x03,0xde,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80de03cf <unknown>
 
 
@@ -104,19 +106,19 @@ fmop4a  za7.d, {z14.d-z15.d}, {z30.d-z31.d}  // 10000000-11011110-00000011-11001
 fmop4s  za0.d, z0.d, z16.d  // 10000000-11000000-00000000-00011000
 // CHECK-INST: fmop4s  za0.d, z0.d, z16.d
 // CHECK-ENCODING: [0x18,0x00,0xc0,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80c00018 <unknown>
 
 fmop4s  za5.d, z10.d, z20.d  // 10000000-11000100-00000001-01011101
 // CHECK-INST: fmop4s  za5.d, z10.d, z20.d
 // CHECK-ENCODING: [0x5d,0x01,0xc4,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80c4015d <unknown>
 
 fmop4s  za7.d, z14.d, z30.d  // 10000000-11001110-00000001-11011111
 // CHECK-INST: fmop4s  za7.d, z14.d, z30.d
 // CHECK-ENCODING: [0xdf,0x01,0xce,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80ce01df <unknown>
 
 // Single and multiple vectors
@@ -124,19 +126,19 @@ fmop4s  za7.d, z14.d, z30.d  // 10000000-11001110-00000001-11011111
 fmop4s  za0.d, z0.d, {z16.d-z17.d}  // 10000000-11010000-00000000-00011000
 // CHECK-INST: fmop4s  za0.d, z0.d, { z16.d, z17.d }
 // CHECK-ENCODING: [0x18,0x00,0xd0,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80d00018 <unknown>
 
 fmop4s  za5.d, z10.d, {z20.d-z21.d}  // 10000000-11010100-00000001-01011101
 // CHECK-INST: fmop4s  za5.d, z10.d, { z20.d, z21.d }
 // CHECK-ENCODING: [0x5d,0x01,0xd4,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80d4015d <unknown>
 
 fmop4s  za7.d, z14.d, {z30.d-z31.d}  // 10000000-11011110-00000001-11011111
 // CHECK-INST: fmop4s  za7.d, z14.d, { z30.d, z31.d }
 // CHECK-ENCODING: [0xdf,0x01,0xde,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80de01df <unknown>
 
 // Multiple and single vectors
@@ -144,19 +146,19 @@ fmop4s  za7.d, z14.d, {z30.d-z31.d}  // 10000000-11011110-00000001-11011111
 fmop4s  za0.d, {z0.d-z1.d}, z16.d  // 10000000-11000000-00000010-00011000
 // CHECK-INST: fmop4s  za0.d, { z0.d, z1.d }, z16.d
 // CHECK-ENCODING: [0x18,0x02,0xc0,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80c00218 <unknown>
 
 fmop4s  za5.d, {z10.d-z11.d}, z20.d  // 10000000-11000100-00000011-01011101
 // CHECK-INST: fmop4s  za5.d, { z10.d, z11.d }, z20.d
 // CHECK-ENCODING: [0x5d,0x03,0xc4,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80c4035d <unknown>
 
 fmop4s  za7.d, {z14.d-z15.d}, z30.d  // 10000000-11001110-00000011-11011111
 // CHECK-INST: fmop4s  za7.d, { z14.d, z15.d }, z30.d
 // CHECK-ENCODING: [0xdf,0x03,0xce,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80ce03df <unknown>
 
 // Multiple vectors
@@ -164,17 +166,17 @@ fmop4s  za7.d, {z14.d-z15.d}, z30.d  // 10000000-11001110-00000011-11011111
 fmop4s  za0.d, {z0.d-z1.d}, {z16.d-z17.d}  // 10000000-11010000-00000010-00011000
 // CHECK-INST: fmop4s  za0.d, { z0.d, z1.d }, { z16.d, z17.d }
 // CHECK-ENCODING: [0x18,0x02,0xd0,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80d00218 <unknown>
 
 fmop4s  za5.d, {z10.d-z11.d}, {z20.d-z21.d}  // 10000000-11010100-00000011-01011101
 // CHECK-INST: fmop4s  za5.d, { z10.d, z11.d }, { z20.d, z21.d }
 // CHECK-ENCODING: [0x5d,0x03,0xd4,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80d4035d <unknown>
 
 fmop4s  za7.d, {z14.d-z15.d}, {z30.d-z31.d}  // 10000000-11011110-00000011-11011111
 // CHECK-INST: fmop4s  za7.d, { z14.d, z15.d }, { z30.d, z31.d }
 // CHECK-ENCODING: [0xdf,0x03,0xde,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f64f64
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4 sme-f64f64
 // CHECK-UNKNOWN: 80de03df <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/ftmopa.s b/llvm/test/MC/AArch64/SME2p2/ftmopa.s
index 6944b94e6a812c..2663a6f7efe029 100644
--- a/llvm/test/MC/AArch64/SME2p2/ftmopa.s
+++ b/llvm/test/MC/AArch64/SME2p2/ftmopa.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-f8f32,+sme-f8f16,+sme-f16f16 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-tmop,+sme-f8f32,+sme-f8f16,+sme-f16f16 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-f8f32,+sme-f8f16,+sme-f16f16 < %s \
@@ -17,19 +19,19 @@
 ftmopa  za0.h, {z0.b-z1.b}, z0.b, z20[0]  // 10000000-01100000-00000000-00001000
 // CHECK-INST: ftmopa  za0.h, { z0.b, z1.b }, z0.b, z20[0]
 // CHECK-ENCODING: [0x08,0x00,0x60,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-f8f16
 // CHECK-UNKNOWN: 80600008 <unknown>
 
 ftmopa  za1.h, {z10.b-z11.b}, z21.b, z29[1]  // 10000000-01110101-00010101-01011001
 // CHECK-INST: ftmopa  za1.h, { z10.b, z11.b }, z21.b, z29[1]
 // CHECK-ENCODING: [0x59,0x15,0x75,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-f8f16
 // CHECK-UNKNOWN: 80751559 <unknown>
 
 ftmopa  za1.h, {z30.b-z31.b}, z31.b, z31[3]  // 10000000-01111111-00011111-11111001
 // CHECK-INST: ftmopa  za1.h, { z30.b, z31.b }, z31.b, z31[3]
 // CHECK-ENCODING: [0xf9,0x1f,0x7f,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-f8f16
 // CHECK-UNKNOWN: 807f1ff9 <unknown>
 
 // 2-way, (fp16-to-fp32)
@@ -37,19 +39,19 @@ ftmopa  za1.h, {z30.b-z31.b}, z31.b, z31[3]  // 10000000-01111111-00011111-11111
 ftmopa  za0.s, {z0.h-z1.h}, z0.h, z20[0]  // 10000001-01100000-00000000-00000000
 // CHECK-INST: ftmopa  za0.s, { z0.h, z1.h }, z0.h, z20[0]
 // CHECK-ENCODING: [0x00,0x00,0x60,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 81600000 <unknown>
 
 ftmopa  za3.s, {z12.h-z13.h}, z8.h, z23[3]  // 10000001-01101000-00001101-10110011
 // CHECK-INST: ftmopa  za3.s, { z12.h, z13.h }, z8.h, z23[3]
 // CHECK-ENCODING: [0xb3,0x0d,0x68,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 81680db3 <unknown>
 
 ftmopa  za3.s, {z30.h-z31.h}, z31.h, z31[3]  // 10000001-01111111-00011111-11110011
 // CHECK-INST: ftmopa  za3.s, { z30.h, z31.h }, z31.h, z31[3]
 // CHECK-ENCODING: [0xf3,0x1f,0x7f,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 817f1ff3 <unknown>
 
 // 4-way
@@ -57,19 +59,19 @@ ftmopa  za3.s, {z30.h-z31.h}, z31.h, z31[3]  // 10000001-01111111-00011111-11110
 ftmopa  za0.s, {z0.b-z1.b}, z0.b, z20[0]  // 10000000-01100000-00000000-00000000
 // CHECK-INST: ftmopa  za0.s, { z0.b, z1.b }, z0.b, z20[0]
 // CHECK-ENCODING: [0x00,0x00,0x60,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-f8f32
 // CHECK-UNKNOWN: 80600000 <unknown>
 
 ftmopa  za3.s, {z12.b-z13.b}, z8.b, z23[3]  // 10000000-01101000-00001101-10110011
 // CHECK-INST: ftmopa  za3.s, { z12.b, z13.b }, z8.b, z23[3]
 // CHECK-ENCODING: [0xb3,0x0d,0x68,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-f8f32
 // CHECK-UNKNOWN: 80680db3 <unknown>
 
 ftmopa  za3.s, {z30.b-z31.b}, z31.b, z31[3]  // 10000000-01111111-00011111-11110011
 // CHECK-INST: ftmopa  za3.s, { z30.b, z31.b }, z31.b, z31[3]
 // CHECK-ENCODING: [0xf3,0x1f,0x7f,0x80]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f8f32
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-f8f32
 // CHECK-UNKNOWN: 807f1ff3 <unknown>
 
 // non-widening (half-precision)
@@ -77,19 +79,19 @@ ftmopa  za3.s, {z30.b-z31.b}, z31.b, z31[3]  // 10000000-01111111-00011111-11110
 ftmopa  za0.h, {z0.h-z1.h}, z0.h, z20[0]  // 10000001-01000000-00000000-00001000
 // CHECK-INST: ftmopa  za0.h, { z0.h, z1.h }, z0.h, z20[0]
 // CHECK-ENCODING: [0x08,0x00,0x40,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-f16f16
 // CHECK-UNKNOWN: 81400008 <unknown>
 
 ftmopa  za1.h, {z12.h-z13.h}, z8.h, z23[3]  // 10000001-01001000-00001101-10111001
 // CHECK-INST: ftmopa  za1.h, { z12.h, z13.h }, z8.h, z23[3]
 // CHECK-ENCODING: [0xb9,0x0d,0x48,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-f16f16
 // CHECK-UNKNOWN: 81480db9 <unknown>
 
 ftmopa  za1.h, {z30.h-z31.h}, z31.h, z31[3]  // 10000001-01011111-00011111-11111011
 // CHECK-INST: ftmopa  za1.h, { z30.h, z31.h }, z31.h, z31[3]
 // CHECK-ENCODING: [0xf9,0x1f,0x5f,0x81]
-// CHECK-ERROR: instruction requires: sme2p2 sme-f16f16
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop sme-f16f16
 // CHECK-UNKNOWN: 815f1ff9 <unknown>
 
 // non-widening (single-precision)
@@ -97,17 +99,17 @@ ftmopa  za1.h, {z30.h-z31.h}, z31.h, z31[3]  // 10000001-01011111-00011111-11111
 ftmopa  za0.s, {z0.s-z1.s}, z0.s, z20[0]  // 10000000-01000000-00000000-00000000
 // CHECK-INST: ftmopa  za0.s, { z0.s, z1.s }, z0.s, z20[0]
 // CHECK-ENCODING: [0x00,0x00,0x40,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 80400000 <unknown>
 
 ftmopa  za3.s, {z12.s-z13.s}, z8.s, z23[3]  // 10000000-01001000-00001101-10110011
 // CHECK-INST: ftmopa  za3.s, { z12.s, z13.s }, z8.s, z23[3]
 // CHECK-ENCODING: [0xb3,0x0d,0x48,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 80480db3 <unknown>
 
 ftmopa  za3.s, {z30.s-z31.s}, z31.s, z31[3]  // 10000000-01011111-00011111-11110011
 // CHECK-INST: ftmopa  za3.s, { z30.s, z31.s }, z31.s, z31[3]
 // CHECK-ENCODING: [0xf3,0x1f,0x5f,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
-// CHECK-UNKNOWN: 805f1ff3 <unknown>
\ No newline at end of file
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
+// CHECK-UNKNOWN: 805f1ff3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/smop4a-16to32.s b/llvm/test/MC/AArch64/SME2p2/smop4a-16to32.s
index fe4de7307ec50b..19a72e4c12ee81 100644
--- a/llvm/test/MC/AArch64/SME2p2/smop4a-16to32.s
+++ b/llvm/test/MC/AArch64/SME2p2/smop4a-16to32.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,71 +17,71 @@
 smop4a  za0.s, z0.h, z16.h  // 10000000-00000000-10000000-00001000
 // CHECK-INST: smop4a  za0.s, z0.h, z16.h
 // CHECK-ENCODING: [0x08,0x80,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80008008 <unknown>
 
 smop4a  za3.s, z12.h, z24.h  // 10000000-00001000-10000001-10001011
 // CHECK-INST: smop4a  za3.s, z12.h, z24.h
 // CHECK-ENCODING: [0x8b,0x81,0x08,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8008818b <unknown>
 
 smop4a  za3.s, z14.h, z30.h  // 10000000-00001110-10000001-11001011
 // CHECK-INST: smop4a  za3.s, z14.h, z30.h
 // CHECK-ENCODING: [0xcb,0x81,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e81cb <unknown>
 
 smop4a  za0.s, z0.h, {z16.h-z17.h}  // 10000000-00010000-10000000-00001000
 // CHECK-INST: smop4a  za0.s, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x80,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80108008 <unknown>
 
 smop4a  za3.s, z12.h, {z24.h-z25.h}  // 10000000-00011000-10000001-10001011
 // CHECK-INST: smop4a  za3.s, z12.h, { z24.h, z25.h }
 // CHECK-ENCODING: [0x8b,0x81,0x18,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8018818b <unknown>
 
 smop4a  za3.s, z14.h, {z30.h-z31.h}  // 10000000-00011110-10000001-11001011
 // CHECK-INST: smop4a  za3.s, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcb,0x81,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e81cb <unknown>
 
 smop4a  za0.s, {z0.h-z1.h}, z16.h  // 10000000-00000000-10000010-00001000
 // CHECK-INST: smop4a  za0.s, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x08,0x82,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80008208 <unknown>
 
 smop4a  za3.s, {z12.h-z13.h}, z24.h  // 10000000-00001000-10000011-10001011
 // CHECK-INST: smop4a  za3.s, { z12.h, z13.h }, z24.h
 // CHECK-ENCODING: [0x8b,0x83,0x08,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8008838b <unknown>
 
 smop4a  za3.s, {z14.h-z15.h}, z30.h  // 10000000-00001110-10000011-11001011
 // CHECK-INST: smop4a  za3.s, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xcb,0x83,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e83cb <unknown>
 
 smop4a  za0.s, {z0.h-z1.h}, {z16.h-z17.h}  // 10000000-00010000-10000010-00001000
 // CHECK-INST: smop4a  za0.s, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x82,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80108208 <unknown>
 
 smop4a  za3.s, {z12.h-z13.h}, {z24.h-z25.h}  // 10000000-00011000-10000011-10001011
 // CHECK-INST: smop4a  za3.s, { z12.h, z13.h }, { z24.h, z25.h }
 // CHECK-ENCODING: [0x8b,0x83,0x18,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8018838b <unknown>
 
 smop4a  za3.s, {z14.h-z15.h}, {z30.h-z31.h}  // 10000000-00011110-10000011-11001011
 // CHECK-INST: smop4a  za3.s, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcb,0x83,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e83cb <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/smop4a-64.s b/llvm/test/MC/AArch64/SME2p2/smop4a-64.s
index be9b6aaa47eccd..156952c4f60dc9 100644
--- a/llvm/test/MC/AArch64/SME2p2/smop4a-64.s
+++ b/llvm/test/MC/AArch64/SME2p2/smop4a-64.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-i16i64 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-i16i64 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-i16i64 < %s \
@@ -15,71 +17,71 @@
 smop4a  za0.d, z0.h, z16.h  // 10100000-11000000-00000000-00001000
 // CHECK-INST: smop4a  za0.d, z0.h, z16.h
 // CHECK-ENCODING: [0x08,0x00,0xc0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0c00008 <unknown>
 
 smop4a  za5.d, z10.h, z20.h  // 10100000-11000100-00000001-01001101
 // CHECK-INST: smop4a  za5.d, z10.h, z20.h
 // CHECK-ENCODING: [0x4d,0x01,0xc4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0c4014d <unknown>
 
 smop4a  za7.d, z14.h, z30.h  // 10100000-11001110-00000001-11001111
 // CHECK-INST: smop4a  za7.d, z14.h, z30.h
 // CHECK-ENCODING: [0xcf,0x01,0xce,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0ce01cf <unknown>
 
 smop4a  za0.d, z0.h, {z16.h-z17.h}  // 10100000-11010000-00000000-00001000
 // CHECK-INST: smop4a  za0.d, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x00,0xd0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0d00008 <unknown>
 
 smop4a  za5.d, z10.h, {z20.h-z21.h}  // 10100000-11010100-00000001-01001101
 // CHECK-INST: smop4a  za5.d, z10.h, { z20.h, z21.h }
 // CHECK-ENCODING: [0x4d,0x01,0xd4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0d4014d <unknown>
 
 smop4a  za7.d, z14.h, {z30.h-z31.h}  // 10100000-11011110-00000001-11001111
 // CHECK-INST: smop4a  za7.d, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcf,0x01,0xde,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0de01cf <unknown>
 
 smop4a  za0.d, {z0.h-z1.h}, z16.h  // 10100000-11000000-00000010-00001000
 // CHECK-INST: smop4a  za0.d, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x08,0x02,0xc0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0c00208 <unknown>
 
 smop4a  za5.d, {z10.h-z11.h}, z20.h  // 10100000-11000100-00000011-01001101
 // CHECK-INST: smop4a  za5.d, { z10.h, z11.h }, z20.h
 // CHECK-ENCODING: [0x4d,0x03,0xc4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0c4034d <unknown>
 
 smop4a  za7.d, {z14.h-z15.h}, z30.h  // 10100000-11001110-00000011-11001111
 // CHECK-INST: smop4a  za7.d, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xcf,0x03,0xce,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0ce03cf <unknown>
 
 smop4a  za0.d, {z0.h-z1.h}, {z16.h-z17.h}  // 10100000-11010000-00000010-00001000
 // CHECK-INST: smop4a  za0.d, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x02,0xd0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0d00208 <unknown>
 
 smop4a  za5.d, {z10.h-z11.h}, {z20.h-z21.h}  // 10100000-11010100-00000011-01001101
 // CHECK-INST: smop4a  za5.d, { z10.h, z11.h }, { z20.h, z21.h }
 // CHECK-ENCODING: [0x4d,0x03,0xd4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0d4034d <unknown>
 
 smop4a  za7.d, {z14.h-z15.h}, {z30.h-z31.h}  // 10100000-11011110-00000011-11001111
 // CHECK-INST: smop4a  za7.d, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcf,0x03,0xde,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0de03cf <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/smop4a-8to32.s b/llvm/test/MC/AArch64/SME2p2/smop4a-8to32.s
index 0615c8fc690d8d..ee5cdc214c8ee2 100644
--- a/llvm/test/MC/AArch64/SME2p2/smop4a-8to32.s
+++ b/llvm/test/MC/AArch64/SME2p2/smop4a-8to32.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,71 +17,71 @@
 smop4a  za0.s, z0.b, z16.b  // 10000000-00000000-10000000-00000000
 // CHECK-INST: smop4a  za0.s, z0.b, z16.b
 // CHECK-ENCODING: [0x00,0x80,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80008000 <unknown>
 
 smop4a  za1.s, z10.b, z20.b  // 10000000-00000100-10000001-01000001
 // CHECK-INST: smop4a  za1.s, z10.b, z20.b
 // CHECK-ENCODING: [0x41,0x81,0x04,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80048141 <unknown>
 
 smop4a  za3.s, z14.b, z30.b  // 10000000-00001110-10000001-11000011
 // CHECK-INST: smop4a  za3.s, z14.b, z30.b
 // CHECK-ENCODING: [0xc3,0x81,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e81c3 <unknown>
 
 smop4a  za0.s, z0.b, {z16.b-z17.b}  // 10000000-00010000-10000000-00000000
 // CHECK-INST: smop4a  za0.s, z0.b, { z16.b, z17.b }
 // CHECK-ENCODING: [0x00,0x80,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80108000 <unknown>
 
 smop4a  za3.s, z12.b, {z24.b-z25.b}  // 10000000-00011000-10000001-10000011
 // CHECK-INST: smop4a  za3.s, z12.b, { z24.b, z25.b }
 // CHECK-ENCODING: [0x83,0x81,0x18,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80188183 <unknown>
 
 smop4a  za3.s, z14.b, {z30.b-z31.b}  // 10000000-00011110-10000001-11000011
 // CHECK-INST: smop4a  za3.s, z14.b, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc3,0x81,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e81c3 <unknown>
 
 smop4a  za0.s, {z0.b-z1.b}, z16.b  // 10000000-00000000-10000010-00000000
 // CHECK-INST: smop4a  za0.s, { z0.b, z1.b }, z16.b
 // CHECK-ENCODING: [0x00,0x82,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80008200 <unknown>
 
 smop4a  za1.s, {z10.b-z11.b}, z20.b  // 10000000-00000100-10000011-01000001
 // CHECK-INST: smop4a  za1.s, { z10.b, z11.b }, z20.b
 // CHECK-ENCODING: [0x41,0x83,0x04,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80048341 <unknown>
 
 smop4a  za3.s, {z14.b-z15.b}, z30.b  // 10000000-00001110-10000011-11000011
 // CHECK-INST: smop4a  za3.s, { z14.b, z15.b }, z30.b
 // CHECK-ENCODING: [0xc3,0x83,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e83c3 <unknown>
 
 smop4a  za0.s, {z0.b-z1.b}, {z16.b-z17.b}  // 10000000-00010000-10000010-00000000
 // CHECK-INST: smop4a  za0.s, { z0.b, z1.b }, { z16.b, z17.b }
 // CHECK-ENCODING: [0x00,0x82,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80108200 <unknown>
 
 smop4a  za1.s, {z10.b-z11.b}, {z20.b-z21.b}  // 10000000-00010100-10000011-01000001
 // CHECK-INST: smop4a  za1.s, { z10.b, z11.b }, { z20.b, z21.b }
 // CHECK-ENCODING: [0x41,0x83,0x14,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80148341 <unknown>
 
 smop4a  za3.s, {z14.b-z15.b}, {z30.b-z31.b}  // 10000000-00011110-10000011-11000011
 // CHECK-INST: smop4a  za3.s, { z14.b, z15.b }, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc3,0x83,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e83c3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/smop4s-16to32.s b/llvm/test/MC/AArch64/SME2p2/smop4s-16to32.s
index 41828c97321a81..ee3a012c749add 100644
--- a/llvm/test/MC/AArch64/SME2p2/smop4s-16to32.s
+++ b/llvm/test/MC/AArch64/SME2p2/smop4s-16to32.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,71 +17,71 @@
 smop4s  za0.s, z0.h, z16.h  // 10000000-00000000-10000000-00011000
 // CHECK-INST: smop4s  za0.s, z0.h, z16.h
 // CHECK-ENCODING: [0x18,0x80,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80008018 <unknown>
 
 smop4s  za3.s, z12.h, z24.h  // 10000000-00001000-10000001-10011011
 // CHECK-INST: smop4s  za3.s, z12.h, z24.h
 // CHECK-ENCODING: [0x9b,0x81,0x08,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8008819b <unknown>
 
 smop4s  za3.s, z14.h, z30.h  // 10000000-00001110-10000001-11011011
 // CHECK-INST: smop4s  za3.s, z14.h, z30.h
 // CHECK-ENCODING: [0xdb,0x81,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e81db <unknown>
 
 smop4s  za0.s, z0.h, {z16.h-z17.h}  // 10000000-00010000-10000000-00011000
 // CHECK-INST: smop4s  za0.s, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x80,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80108018 <unknown>
 
 smop4s  za3.s, z12.h, {z24.h-z25.h}  // 10000000-00011000-10000001-10011011
 // CHECK-INST: smop4s  za3.s, z12.h, { z24.h, z25.h }
 // CHECK-ENCODING: [0x9b,0x81,0x18,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8018819b <unknown>
 
 smop4s  za3.s, z14.h, {z30.h-z31.h}  // 10000000-00011110-10000001-11011011
 // CHECK-INST: smop4s  za3.s, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xdb,0x81,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e81db <unknown>
 
 smop4s  za0.s, {z0.h-z1.h}, z16.h  // 10000000-00000000-10000010-00011000
 // CHECK-INST: smop4s  za0.s, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x18,0x82,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80008218 <unknown>
 
 smop4s  za3.s, {z12.h-z13.h}, z24.h  // 10000000-00001000-10000011-10011011
 // CHECK-INST: smop4s  za3.s, { z12.h, z13.h }, z24.h
 // CHECK-ENCODING: [0x9b,0x83,0x08,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8008839b <unknown>
 
 smop4s  za3.s, {z14.h-z15.h}, z30.h  // 10000000-00001110-10000011-11011011
 // CHECK-INST: smop4s  za3.s, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xdb,0x83,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e83db <unknown>
 
 smop4s  za0.s, {z0.h-z1.h}, {z16.h-z17.h}  // 10000000-00010000-10000010-00011000
 // CHECK-INST: smop4s  za0.s, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x82,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80108218 <unknown>
 
 smop4s  za3.s, {z12.h-z13.h}, {z24.h-z25.h}  // 10000000-00011000-10000011-10011011
 // CHECK-INST: smop4s  za3.s, { z12.h, z13.h }, { z24.h, z25.h }
 // CHECK-ENCODING: [0x9b,0x83,0x18,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8018839b <unknown>
 
 smop4s  za3.s, {z14.h-z15.h}, {z30.h-z31.h}  // 10000000-00011110-10000011-11011011
 // CHECK-INST: smop4s  za3.s, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xdb,0x83,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e83db <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/smop4s-64.s b/llvm/test/MC/AArch64/SME2p2/smop4s-64.s
index 1b2e2637f01190..c6b33aaf0fb6d1 100644
--- a/llvm/test/MC/AArch64/SME2p2/smop4s-64.s
+++ b/llvm/test/MC/AArch64/SME2p2/smop4s-64.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-i16i64 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-i16i64 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-i16i64 < %s \
@@ -15,71 +17,71 @@
 smop4s  za0.d, z0.h, z16.h  // 10100000-11000000-00000000-00011000
 // CHECK-INST: smop4s  za0.d, z0.h, z16.h
 // CHECK-ENCODING: [0x18,0x00,0xc0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0c00018 <unknown>
 
 smop4s  za5.d, z10.h, z20.h  // 10100000-11000100-00000001-01011101
 // CHECK-INST: smop4s  za5.d, z10.h, z20.h
 // CHECK-ENCODING: [0x5d,0x01,0xc4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0c4015d <unknown>
 
 smop4s  za7.d, z14.h, z30.h  // 10100000-11001110-00000001-11011111
 // CHECK-INST: smop4s  za7.d, z14.h, z30.h
 // CHECK-ENCODING: [0xdf,0x01,0xce,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0ce01df <unknown>
 
 smop4s  za0.d, z0.h, {z16.h-z17.h}  // 10100000-11010000-00000000-00011000
 // CHECK-INST: smop4s  za0.d, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x00,0xd0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0d00018 <unknown>
 
 smop4s  za5.d, z10.h, {z20.h-z21.h}  // 10100000-11010100-00000001-01011101
 // CHECK-INST: smop4s  za5.d, z10.h, { z20.h, z21.h }
 // CHECK-ENCODING: [0x5d,0x01,0xd4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0d4015d <unknown>
 
 smop4s  za7.d, z14.h, {z30.h-z31.h}  // 10100000-11011110-00000001-11011111
 // CHECK-INST: smop4s  za7.d, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xdf,0x01,0xde,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0de01df <unknown>
 
 smop4s  za0.d, {z0.h-z1.h}, z16.h  // 10100000-11000000-00000010-00011000
 // CHECK-INST: smop4s  za0.d, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x18,0x02,0xc0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0c00218 <unknown>
 
 smop4s  za5.d, {z10.h-z11.h}, z20.h  // 10100000-11000100-00000011-01011101
 // CHECK-INST: smop4s  za5.d, { z10.h, z11.h }, z20.h
 // CHECK-ENCODING: [0x5d,0x03,0xc4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0c4035d <unknown>
 
 smop4s  za7.d, {z14.h-z15.h}, z30.h  // 10100000-11001110-00000011-11011111
 // CHECK-INST: smop4s  za7.d, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xdf,0x03,0xce,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0ce03df <unknown>
 
 smop4s  za0.d, {z0.h-z1.h}, {z16.h-z17.h}  // 10100000-11010000-00000010-00011000
 // CHECK-INST: smop4s  za0.d, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x02,0xd0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0d00218 <unknown>
 
 smop4s  za5.d, {z10.h-z11.h}, {z20.h-z21.h}  // 10100000-11010100-00000011-01011101
 // CHECK-INST: smop4s  za5.d, { z10.h, z11.h }, { z20.h, z21.h }
 // CHECK-ENCODING: [0x5d,0x03,0xd4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0d4035d <unknown>
 
 smop4s  za7.d, {z14.h-z15.h}, {z30.h-z31.h}  // 10100000-11011110-00000011-11011111
 // CHECK-INST: smop4s  za7.d, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xdf,0x03,0xde,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0de03df <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/smop4s-8to32.s b/llvm/test/MC/AArch64/SME2p2/smop4s-8to32.s
index 43fbda91728668..bd388eed452f91 100644
--- a/llvm/test/MC/AArch64/SME2p2/smop4s-8to32.s
+++ b/llvm/test/MC/AArch64/SME2p2/smop4s-8to32.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,71 +17,71 @@
 smop4s  za0.s, z0.b, z16.b  // 10000000-00000000-10000000-00010000
 // CHECK-INST: smop4s  za0.s, z0.b, z16.b
 // CHECK-ENCODING: [0x10,0x80,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80008010 <unknown>
 
 smop4s  za1.s, z10.b, z20.b  // 10000000-00000100-10000001-01010001
 // CHECK-INST: smop4s  za1.s, z10.b, z20.b
 // CHECK-ENCODING: [0x51,0x81,0x04,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80048151 <unknown>
 
 smop4s  za3.s, z14.b, z30.b  // 10000000-00001110-10000001-11010011
 // CHECK-INST: smop4s  za3.s, z14.b, z30.b
 // CHECK-ENCODING: [0xd3,0x81,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e81d3 <unknown>
 
 smop4s  za0.s, z0.b, {z16.b-z17.b}  // 10000000-00010000-10000000-00010000
 // CHECK-INST: smop4s  za0.s, z0.b, { z16.b, z17.b }
 // CHECK-ENCODING: [0x10,0x80,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80108010 <unknown>
 
 smop4s  za1.s, z10.b, {z20.b-z21.b}  // 10000000-00010100-10000001-01010001
 // CHECK-INST: smop4s  za1.s, z10.b, { z20.b, z21.b }
 // CHECK-ENCODING: [0x51,0x81,0x14,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80148151 <unknown>
 
 smop4s  za3.s, z14.b, {z30.b-z31.b}  // 10000000-00011110-10000001-11010011
 // CHECK-INST: smop4s  za3.s, z14.b, { z30.b, z31.b }
 // CHECK-ENCODING: [0xd3,0x81,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e81d3 <unknown>
 
 smop4s  za0.s, {z0.b-z1.b}, z16.b  // 10000000-00000000-10000010-00010000
 // CHECK-INST: smop4s  za0.s, { z0.b, z1.b }, z16.b
 // CHECK-ENCODING: [0x10,0x82,0x00,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80008210 <unknown>
 
 smop4s  za1.s, {z10.b-z11.b}, z20.b  // 10000000-00000100-10000011-01010001
 // CHECK-INST: smop4s  za1.s, { z10.b, z11.b }, z20.b
 // CHECK-ENCODING: [0x51,0x83,0x04,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80048351 <unknown>
 
 smop4s  za3.s, {z14.b-z15.b}, z30.b  // 10000000-00001110-10000011-11010011
 // CHECK-INST: smop4s  za3.s, { z14.b, z15.b }, z30.b
 // CHECK-ENCODING: [0xd3,0x83,0x0e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 800e83d3 <unknown>
 
 smop4s  za0.s, {z0.b-z1.b}, {z16.b-z17.b}  // 10000000-00010000-10000010-00010000
 // CHECK-INST: smop4s  za0.s, { z0.b, z1.b }, { z16.b, z17.b }
 // CHECK-ENCODING: [0x10,0x82,0x10,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80108210 <unknown>
 
 smop4s  za1.s, {z10.b-z11.b}, {z20.b-z21.b}  // 10000000-00010100-10000011-01010001
 // CHECK-INST: smop4s  za1.s, { z10.b, z11.b }, { z20.b, z21.b }
 // CHECK-ENCODING: [0x51,0x83,0x14,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80148351 <unknown>
 
 smop4s  za3.s, {z14.b-z15.b}, {z30.b-z31.b}  // 10000000-00011110-10000011-11010011
 // CHECK-INST: smop4s  za3.s, { z14.b, z15.b }, { z30.b, z31.b }
 // CHECK-ENCODING: [0xd3,0x83,0x1e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 801e83d3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/stmopa.s b/llvm/test/MC/AArch64/SME2p2/stmopa.s
index c641eb46108a73..c8a5218039f488 100644
--- a/llvm/test/MC/AArch64/SME2p2/stmopa.s
+++ b/llvm/test/MC/AArch64/SME2p2/stmopa.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-tmop < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,35 +17,35 @@
 stmopa  za0.s, {z0.b-z1.b}, z0.b, z20[0]  // 10000000-01000000-10000000-00000000
 // CHECK-INST: stmopa  za0.s, { z0.b, z1.b }, z0.b, z20[0]
 // CHECK-ENCODING: [0x00,0x80,0x40,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 80408000 <unknown>
 
 stmopa  za3.s, {z12.b-z13.b}, z8.b, z23[3]  // 10000000-01001000-10001101-10110011
 // CHECK-INST: stmopa  za3.s, { z12.b, z13.b }, z8.b, z23[3]
 // CHECK-ENCODING: [0xb3,0x8d,0x48,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 80488db3 <unknown>
 
 stmopa  za3.s, {z30.b-z31.b}, z31.b, z31[3]  // 10000000-01011111-10011111-11110011
 // CHECK-INST: stmopa  za3.s, { z30.b, z31.b }, z31.b, z31[3]
 // CHECK-ENCODING: [0xf3,0x9f,0x5f,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 805f9ff3 <unknown>
 
 stmopa  za0.s, {z0.h-z1.h}, z0.h, z20[0]  // 10000000-01000000-10000000-00001000
 // CHECK-INST: stmopa  za0.s, { z0.h, z1.h }, z0.h, z20[0]
 // CHECK-ENCODING: [0x08,0x80,0x40,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 80408008 <unknown>
 
 stmopa  za3.s, {z12.h-z13.h}, z8.h, z23[3]  // 10000000-01001000-10001101-10111011
 // CHECK-INST: stmopa  za3.s, { z12.h, z13.h }, z8.h, z23[3]
 // CHECK-ENCODING: [0xbb,0x8d,0x48,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 80488dbb <unknown>
 
 stmopa  za3.s, {z30.h-z31.h}, z31.h, z31[3]  // 10000000-01011111-10011111-11111011
 // CHECK-INST: stmopa  za3.s, { z30.h, z31.h }, z31.h, z31[3]
 // CHECK-ENCODING: [0xfb,0x9f,0x5f,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 805f9ffb <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/sumop4a-32.s b/llvm/test/MC/AArch64/SME2p2/sumop4a-32.s
index 8633eae24f4982..333f49769330dd 100644
--- a/llvm/test/MC/AArch64/SME2p2/sumop4a-32.s
+++ b/llvm/test/MC/AArch64/SME2p2/sumop4a-32.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,71 +17,71 @@
 sumop4a za0.s, z0.b, z16.b  // 10000000-00100000-10000000-00000000
 // CHECK-INST: sumop4a za0.s, z0.b, z16.b
 // CHECK-ENCODING: [0x00,0x80,0x20,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80208000 <unknown>
 
 sumop4a za1.s, z10.b, z20.b  // 10000000-00100100-10000001-01000001
 // CHECK-INST: sumop4a za1.s, z10.b, z20.b
 // CHECK-ENCODING: [0x41,0x81,0x24,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80248141 <unknown>
 
 sumop4a za3.s, z14.b, z30.b  // 10000000-00101110-10000001-11000011
 // CHECK-INST: sumop4a za3.s, z14.b, z30.b
 // CHECK-ENCODING: [0xc3,0x81,0x2e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 802e81c3 <unknown>
 
 sumop4a za0.s, z0.b, {z16.b-z17.b}  // 10000000-00110000-10000000-00000000
 // CHECK-INST: sumop4a za0.s, z0.b, { z16.b, z17.b }
 // CHECK-ENCODING: [0x00,0x80,0x30,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80308000 <unknown>
 
 sumop4a za1.s, z10.b, {z20.b-z21.b}  // 10000000-00110100-10000001-01000001
 // CHECK-INST: sumop4a za1.s, z10.b, { z20.b, z21.b }
 // CHECK-ENCODING: [0x41,0x81,0x34,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80348141 <unknown>
 
 sumop4a za3.s, z14.b, {z30.b-z31.b}  // 10000000-00111110-10000001-11000011
 // CHECK-INST: sumop4a za3.s, z14.b, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc3,0x81,0x3e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 803e81c3 <unknown>
 
 sumop4a za0.s, {z0.b-z1.b}, z16.b  // 10000000-00100000-10000010-00000000
 // CHECK-INST: sumop4a za0.s, { z0.b, z1.b }, z16.b
 // CHECK-ENCODING: [0x00,0x82,0x20,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80208200 <unknown>
 
 sumop4a za1.s, {z10.b-z11.b}, z20.b  // 10000000-00100100-10000011-01000001
 // CHECK-INST: sumop4a za1.s, { z10.b, z11.b }, z20.b
 // CHECK-ENCODING: [0x41,0x83,0x24,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80248341 <unknown>
 
 sumop4a za3.s, {z14.b-z15.b}, z30.b  // 10000000-00101110-10000011-11000011
 // CHECK-INST: sumop4a za3.s, { z14.b, z15.b }, z30.b
 // CHECK-ENCODING: [0xc3,0x83,0x2e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 802e83c3 <unknown>
 
 sumop4a za0.s, {z0.b-z1.b}, {z16.b-z17.b}  // 10000000-00110000-10000010-00000000
 // CHECK-INST: sumop4a za0.s, { z0.b, z1.b }, { z16.b, z17.b }
 // CHECK-ENCODING: [0x00,0x82,0x30,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80308200 <unknown>
 
 sumop4a za1.s, {z10.b-z11.b}, {z20.b-z21.b}  // 10000000-00110100-10000011-01000001
 // CHECK-INST: sumop4a za1.s, { z10.b, z11.b }, { z20.b, z21.b }
 // CHECK-ENCODING: [0x41,0x83,0x34,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80348341 <unknown>
 
 sumop4a za3.s, {z14.b-z15.b}, {z30.b-z31.b}  // 10000000-00111110-10000011-11000011
 // CHECK-INST: sumop4a za3.s, { z14.b, z15.b }, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc3,0x83,0x3e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 803e83c3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/sumop4a-64.s b/llvm/test/MC/AArch64/SME2p2/sumop4a-64.s
index 53fa6f0892c5c1..093d66492e4d69 100644
--- a/llvm/test/MC/AArch64/SME2p2/sumop4a-64.s
+++ b/llvm/test/MC/AArch64/SME2p2/sumop4a-64.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-i16i64 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-i16i64 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-i16i64 < %s \
@@ -15,71 +17,71 @@
 sumop4a za0.d, z0.h, z16.h  // 10100000-11100000-00000000-00001000
 // CHECK-INST: sumop4a za0.d, z0.h, z16.h
 // CHECK-ENCODING: [0x08,0x00,0xe0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0e00008 <unknown>
 
 sumop4a za5.d, z10.h, z20.h  // 10100000-11100100-00000001-01001101
 // CHECK-INST: sumop4a za5.d, z10.h, z20.h
 // CHECK-ENCODING: [0x4d,0x01,0xe4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0e4014d <unknown>
 
 sumop4a za7.d, z14.h, z30.h  // 10100000-11101110-00000001-11001111
 // CHECK-INST: sumop4a za7.d, z14.h, z30.h
 // CHECK-ENCODING: [0xcf,0x01,0xee,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0ee01cf <unknown>
 
 sumop4a za0.d, z0.h, {z16.h-z17.h}  // 10100000-11110000-00000000-00001000
 // CHECK-INST: sumop4a za0.d, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x00,0xf0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0f00008 <unknown>
 
 sumop4a za5.d, z10.h, {z20.h-z21.h}  // 10100000-11110100-00000001-01001101
 // CHECK-INST: sumop4a za5.d, z10.h, { z20.h, z21.h }
 // CHECK-ENCODING: [0x4d,0x01,0xf4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0f4014d <unknown>
 
 sumop4a za7.d, z14.h, {z30.h-z31.h}  // 10100000-11111110-00000001-11001111
 // CHECK-INST: sumop4a za7.d, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcf,0x01,0xfe,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0fe01cf <unknown>
 
 sumop4a za0.d, {z0.h-z1.h}, z16.h  // 10100000-11100000-00000010-00001000
 // CHECK-INST: sumop4a za0.d, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x08,0x02,0xe0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0e00208 <unknown>
 
 sumop4a za5.d, {z10.h-z11.h}, z20.h  // 10100000-11100100-00000011-01001101
 // CHECK-INST: sumop4a za5.d, { z10.h, z11.h }, z20.h
 // CHECK-ENCODING: [0x4d,0x03,0xe4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0e4034d <unknown>
 
 sumop4a za7.d, {z14.h-z15.h}, z30.h  // 10100000-11101110-00000011-11001111
 // CHECK-INST: sumop4a za7.d, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xcf,0x03,0xee,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0ee03cf <unknown>
 
 sumop4a za0.d, {z0.h-z1.h}, {z16.h-z17.h}  // 10100000-11110000-00000010-00001000
 // CHECK-INST: sumop4a za0.d, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x02,0xf0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0f00208 <unknown>
 
 sumop4a za5.d, {z10.h-z11.h}, {z20.h-z21.h}  // 10100000-11110100-00000011-01001101
 // CHECK-INST: sumop4a za5.d, { z10.h, z11.h }, { z20.h, z21.h }
 // CHECK-ENCODING: [0x4d,0x03,0xf4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0f4034d <unknown>
 
 sumop4a za7.d, {z14.h-z15.h}, {z30.h-z31.h}  // 10100000-11111110-00000011-11001111
 // CHECK-INST: sumop4a za7.d, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcf,0x03,0xfe,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0fe03cf <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/sumop4s-32.s b/llvm/test/MC/AArch64/SME2p2/sumop4s-32.s
index be9a25d85a0153..243e6b9e8d8883 100644
--- a/llvm/test/MC/AArch64/SME2p2/sumop4s-32.s
+++ b/llvm/test/MC/AArch64/SME2p2/sumop4s-32.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,71 +17,71 @@
 sumop4s za0.s, z0.b, z16.b  // 10000000-00100000-10000000-00010000
 // CHECK-INST: sumop4s za0.s, z0.b, z16.b
 // CHECK-ENCODING: [0x10,0x80,0x20,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80208010 <unknown>
 
 sumop4s za1.s, z10.b, z20.b  // 10000000-00100100-10000001-01010001
 // CHECK-INST: sumop4s za1.s, z10.b, z20.b
 // CHECK-ENCODING: [0x51,0x81,0x24,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80248151 <unknown>
 
 sumop4s za3.s, z14.b, z30.b  // 10000000-00101110-10000001-11010011
 // CHECK-INST: sumop4s za3.s, z14.b, z30.b
 // CHECK-ENCODING: [0xd3,0x81,0x2e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 802e81d3 <unknown>
 
 sumop4s za0.s, z0.b, {z16.b-z17.b}  // 10000000-00110000-10000000-00010000
 // CHECK-INST: sumop4s za0.s, z0.b, { z16.b, z17.b }
 // CHECK-ENCODING: [0x10,0x80,0x30,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80308010 <unknown>
 
 sumop4s za1.s, z10.b, {z20.b-z21.b}  // 10000000-00110100-10000001-01010001
 // CHECK-INST: sumop4s za1.s, z10.b, { z20.b, z21.b }
 // CHECK-ENCODING: [0x51,0x81,0x34,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80348151 <unknown>
 
 sumop4s za3.s, z14.b, {z30.b-z31.b}  // 10000000-00111110-10000001-11010011
 // CHECK-INST: sumop4s za3.s, z14.b, { z30.b, z31.b }
 // CHECK-ENCODING: [0xd3,0x81,0x3e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 803e81d3 <unknown>
 
 sumop4s za0.s, {z0.b-z1.b}, z16.b  // 10000000-00100000-10000010-00010000
 // CHECK-INST: sumop4s za0.s, { z0.b, z1.b }, z16.b
 // CHECK-ENCODING: [0x10,0x82,0x20,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80208210 <unknown>
 
 sumop4s za1.s, {z10.b-z11.b}, z20.b  // 10000000-00100100-10000011-01010001
 // CHECK-INST: sumop4s za1.s, { z10.b, z11.b }, z20.b
 // CHECK-ENCODING: [0x51,0x83,0x24,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80248351 <unknown>
 
 sumop4s za3.s, {z14.b-z15.b}, z30.b  // 10000000-00101110-10000011-11010011
 // CHECK-INST: sumop4s za3.s, { z14.b, z15.b }, z30.b
 // CHECK-ENCODING: [0xd3,0x83,0x2e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 802e83d3 <unknown>
 
 sumop4s za0.s, {z0.b-z1.b}, {z16.b-z17.b}  // 10000000-00110000-10000010-00010000
 // CHECK-INST: sumop4s za0.s, { z0.b, z1.b }, { z16.b, z17.b }
 // CHECK-ENCODING: [0x10,0x82,0x30,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80308210 <unknown>
 
 sumop4s za1.s, {z10.b-z11.b}, {z20.b-z21.b}  // 10000000-00110100-10000011-01010001
 // CHECK-INST: sumop4s za1.s, { z10.b, z11.b }, { z20.b, z21.b }
 // CHECK-ENCODING: [0x51,0x83,0x34,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 80348351 <unknown>
 
 sumop4s za3.s, {z14.b-z15.b}, {z30.b-z31.b}  // 10000000-00111110-10000011-11010011
 // CHECK-INST: sumop4s za3.s, { z14.b, z15.b }, { z30.b, z31.b }
 // CHECK-ENCODING: [0xd3,0x83,0x3e,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 803e83d3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/sumop4s-64.s b/llvm/test/MC/AArch64/SME2p2/sumop4s-64.s
index dbb2b8ed53ea24..32e3949004aa05 100644
--- a/llvm/test/MC/AArch64/SME2p2/sumop4s-64.s
+++ b/llvm/test/MC/AArch64/SME2p2/sumop4s-64.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-i16i64 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-i16i64 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-i16i64 < %s \
@@ -15,71 +17,71 @@
 sumop4s za0.d, z0.h, z16.h  // 10100000-11100000-00000000-00011000
 // CHECK-INST: sumop4s za0.d, z0.h, z16.h
 // CHECK-ENCODING: [0x18,0x00,0xe0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0e00018 <unknown>
 
 sumop4s za5.d, z10.h, z20.h  // 10100000-11100100-00000001-01011101
 // CHECK-INST: sumop4s za5.d, z10.h, z20.h
 // CHECK-ENCODING: [0x5d,0x01,0xe4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0e4015d <unknown>
 
 sumop4s za7.d, z14.h, z30.h  // 10100000-11101110-00000001-11011111
 // CHECK-INST: sumop4s za7.d, z14.h, z30.h
 // CHECK-ENCODING: [0xdf,0x01,0xee,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0ee01df <unknown>
 
 sumop4s za0.d, z0.h, {z16.h-z17.h}  // 10100000-11110000-00000000-00011000
 // CHECK-INST: sumop4s za0.d, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x00,0xf0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0f00018 <unknown>
 
 sumop4s za5.d, z10.h, {z20.h-z21.h}  // 10100000-11110100-00000001-01011101
 // CHECK-INST: sumop4s za5.d, z10.h, { z20.h, z21.h }
 // CHECK-ENCODING: [0x5d,0x01,0xf4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0f4015d <unknown>
 
 sumop4s za7.d, z14.h, {z30.h-z31.h}  // 10100000-11111110-00000001-11011111
 // CHECK-INST: sumop4s za7.d, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xdf,0x01,0xfe,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0fe01df <unknown>
 
 sumop4s za0.d, {z0.h-z1.h}, z16.h  // 10100000-11100000-00000010-00011000
 // CHECK-INST: sumop4s za0.d, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x18,0x02,0xe0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0e00218 <unknown>
 
 sumop4s za5.d, {z10.h-z11.h}, z20.h  // 10100000-11100100-00000011-01011101
 // CHECK-INST: sumop4s za5.d, { z10.h, z11.h }, z20.h
 // CHECK-ENCODING: [0x5d,0x03,0xe4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0e4035d <unknown>
 
 sumop4s za7.d, {z14.h-z15.h}, z30.h  // 10100000-11101110-00000011-11011111
 // CHECK-INST: sumop4s za7.d, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xdf,0x03,0xee,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0ee03df <unknown>
 
 sumop4s za0.d, {z0.h-z1.h}, {z16.h-z17.h}  // 10100000-11110000-00000010-00011000
 // CHECK-INST: sumop4s za0.d, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x02,0xf0,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0f00218 <unknown>
 
 sumop4s za5.d, {z10.h-z11.h}, {z20.h-z21.h}  // 10100000-11110100-00000011-01011101
 // CHECK-INST: sumop4s za5.d, { z10.h, z11.h }, { z20.h, z21.h }
 // CHECK-ENCODING: [0x5d,0x03,0xf4,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0f4035d <unknown>
 
 sumop4s za7.d, {z14.h-z15.h}, {z30.h-z31.h}  // 10100000-11111110-00000011-11011111
 // CHECK-INST: sumop4s za7.d, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xdf,0x03,0xfe,0xa0]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a0fe03df <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/sutmopa.s b/llvm/test/MC/AArch64/SME2p2/sutmopa.s
index 94a86a8a3f166c..2726ffc29336b2 100644
--- a/llvm/test/MC/AArch64/SME2p2/sutmopa.s
+++ b/llvm/test/MC/AArch64/SME2p2/sutmopa.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-tmop < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,17 +17,17 @@
 sutmopa za0.s, {z0.b-z1.b}, z0.b, z20[0]  // 10000000-01100000-10000000-00000000
 // CHECK-INST: sutmopa za0.s, { z0.b, z1.b }, z0.b, z20[0]
 // CHECK-ENCODING: [0x00,0x80,0x60,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 80608000 <unknown>
 
 sutmopa za1.s, {z10.b-z11.b}, z21.b, z29[1]  // 10000000-01110101-10010101-01010001
 // CHECK-INST: sutmopa za1.s, { z10.b, z11.b }, z21.b, z29[1]
 // CHECK-ENCODING: [0x51,0x95,0x75,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 80759551 <unknown>
 
 sutmopa za3.s, {z30.b-z31.b}, z31.b, z31[3]  // 10000000-01111111-10011111-11110011
 // CHECK-INST: sutmopa za3.s, { z30.b, z31.b }, z31.b, z31[3]
 // CHECK-ENCODING: [0xf3,0x9f,0x7f,0x80]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 807f9ff3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/umop4a-16to32.s b/llvm/test/MC/AArch64/SME2p2/umop4a-16to32.s
index 15490565f8ecfe..4a89b4bcdfe67a 100644
--- a/llvm/test/MC/AArch64/SME2p2/umop4a-16to32.s
+++ b/llvm/test/MC/AArch64/SME2p2/umop4a-16to32.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -16,71 +18,71 @@
 umop4a  za0.s, z0.h, z16.h  // 10000001-00000000-10000000-00001000
 // CHECK-INST: umop4a  za0.s, z0.h, z16.h
 // CHECK-ENCODING: [0x08,0x80,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81008008 <unknown>
 
 umop4a  za3.s, z12.h, z24.h  // 10000001-00001000-10000001-10001011
 // CHECK-INST: umop4a  za3.s, z12.h, z24.h
 // CHECK-ENCODING: [0x8b,0x81,0x08,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8108818b <unknown>
 
 umop4a  za3.s, z14.h, z30.h  // 10000001-00001110-10000001-11001011
 // CHECK-INST: umop4a  za3.s, z14.h, z30.h
 // CHECK-ENCODING: [0xcb,0x81,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810e81cb <unknown>
 
 umop4a  za0.s, z0.h, {z16.h-z17.h}  // 10000001-00010000-10000000-00001000
 // CHECK-INST: umop4a  za0.s, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x80,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81108008 <unknown>
 
 umop4a  za3.s, z12.h, {z24.h-z25.h}  // 10000001-00011000-10000001-10001011
 // CHECK-INST: umop4a  za3.s, z12.h, { z24.h, z25.h }
 // CHECK-ENCODING: [0x8b,0x81,0x18,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8118818b <unknown>
 
 umop4a  za3.s, z14.h, {z30.h-z31.h}  // 10000001-00011110-10000001-11001011
 // CHECK-INST: umop4a  za3.s, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcb,0x81,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811e81cb <unknown>
 
 umop4a  za0.s, {z0.h-z1.h}, z16.h  // 10000001-00000000-10000010-00001000
 // CHECK-INST: umop4a  za0.s, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x08,0x82,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81008208 <unknown>
 
 umop4a  za3.s, {z12.h-z13.h}, z24.h  // 10000001-00001000-10000011-10001011
 // CHECK-INST: umop4a  za3.s, { z12.h, z13.h }, z24.h
 // CHECK-ENCODING: [0x8b,0x83,0x08,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8108838b <unknown>
 
 umop4a  za3.s, {z14.h-z15.h}, z30.h  // 10000001-00001110-10000011-11001011
 // CHECK-INST: umop4a  za3.s, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xcb,0x83,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810e83cb <unknown>
 
 umop4a  za0.s, {z0.h-z1.h}, {z16.h-z17.h}  // 10000001-00010000-10000010-00001000
 // CHECK-INST: umop4a  za0.s, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x82,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81108208 <unknown>
 
 umop4a  za3.s, {z12.h-z13.h}, {z24.h-z25.h}  // 10000001-00011000-10000011-10001011
 // CHECK-INST: umop4a  za3.s, { z12.h, z13.h }, { z24.h, z25.h }
 // CHECK-ENCODING: [0x8b,0x83,0x18,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 8118838b <unknown>
 
 umop4a  za3.s, {z14.h-z15.h}, {z30.h-z31.h}  // 10000001-00011110-10000011-11001011
 // CHECK-INST: umop4a  za3.s, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcb,0x83,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811e83cb <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/umop4a-64.s b/llvm/test/MC/AArch64/SME2p2/umop4a-64.s
index c0f85af6abdbd5..b010fabc036a56 100644
--- a/llvm/test/MC/AArch64/SME2p2/umop4a-64.s
+++ b/llvm/test/MC/AArch64/SME2p2/umop4a-64.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-i16i64 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-i16i64 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-i16i64 < %s \
@@ -15,71 +17,71 @@
 umop4a  za0.d, z0.h, z16.h  // 10100001-11100000-00000000-00001000
 // CHECK-INST: umop4a  za0.d, z0.h, z16.h
 // CHECK-ENCODING: [0x08,0x00,0xe0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1e00008 <unknown>
 
 umop4a  za5.d, z10.h, z20.h  // 10100001-11100100-00000001-01001101
 // CHECK-INST: umop4a  za5.d, z10.h, z20.h
 // CHECK-ENCODING: [0x4d,0x01,0xe4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1e4014d <unknown>
 
 umop4a  za7.d, z14.h, z30.h  // 10100001-11101110-00000001-11001111
 // CHECK-INST: umop4a  za7.d, z14.h, z30.h
 // CHECK-ENCODING: [0xcf,0x01,0xee,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1ee01cf <unknown>
 
 umop4a  za0.d, z0.h, {z16.h-z17.h}  // 10100001-11110000-00000000-00001000
 // CHECK-INST: umop4a  za0.d, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x00,0xf0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1f00008 <unknown>
 
 umop4a  za5.d, z10.h, {z20.h-z21.h}  // 10100001-11110100-00000001-01001101
 // CHECK-INST: umop4a  za5.d, z10.h, { z20.h, z21.h }
 // CHECK-ENCODING: [0x4d,0x01,0xf4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1f4014d <unknown>
 
 umop4a  za7.d, z14.h, {z30.h-z31.h}  // 10100001-11111110-00000001-11001111
 // CHECK-INST: umop4a  za7.d, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcf,0x01,0xfe,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1fe01cf <unknown>
 
 umop4a  za0.d, {z0.h-z1.h}, z16.h  // 10100001-11100000-00000010-00001000
 // CHECK-INST: umop4a  za0.d, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x08,0x02,0xe0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1e00208 <unknown>
 
 umop4a  za5.d, {z10.h-z11.h}, z20.h  // 10100001-11100100-00000011-01001101
 // CHECK-INST: umop4a  za5.d, { z10.h, z11.h }, z20.h
 // CHECK-ENCODING: [0x4d,0x03,0xe4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1e4034d <unknown>
 
 umop4a  za7.d, {z14.h-z15.h}, z30.h  // 10100001-11101110-00000011-11001111
 // CHECK-INST: umop4a  za7.d, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xcf,0x03,0xee,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1ee03cf <unknown>
 
 umop4a  za0.d, {z0.h-z1.h}, {z16.h-z17.h}  // 10100001-11110000-00000010-00001000
 // CHECK-INST: umop4a  za0.d, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x02,0xf0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1f00208 <unknown>
 
 umop4a  za5.d, {z10.h-z11.h}, {z20.h-z21.h}  // 10100001-11110100-00000011-01001101
 // CHECK-INST: umop4a  za5.d, { z10.h, z11.h }, { z20.h, z21.h }
 // CHECK-ENCODING: [0x4d,0x03,0xf4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1f4034d <unknown>
 
 umop4a  za7.d, {z14.h-z15.h}, {z30.h-z31.h}  // 10100001-11111110-00000011-11001111
 // CHECK-INST: umop4a  za7.d, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcf,0x03,0xfe,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1fe03cf <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/umop4a-8to32.s b/llvm/test/MC/AArch64/SME2p2/umop4a-8to32.s
index d22d2249709be8..cd9fbed7d0cf70 100644
--- a/llvm/test/MC/AArch64/SME2p2/umop4a-8to32.s
+++ b/llvm/test/MC/AArch64/SME2p2/umop4a-8to32.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,71 +17,71 @@
 umop4a  za0.s, z0.b, z16.b  // 10000001-00100000-10000000-00000000
 // CHECK-INST: umop4a  za0.s, z0.b, z16.b
 // CHECK-ENCODING: [0x00,0x80,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81208000 <unknown>
 
 umop4a  za1.s, z10.b, z20.b  // 10000001-00100100-10000001-01000001
 // CHECK-INST: umop4a  za1.s, z10.b, z20.b
 // CHECK-ENCODING: [0x41,0x81,0x24,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81248141 <unknown>
 
 umop4a  za3.s, z14.b, z30.b  // 10000001-00101110-10000001-11000011
 // CHECK-INST: umop4a  za3.s, z14.b, z30.b
 // CHECK-ENCODING: [0xc3,0x81,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 812e81c3 <unknown>
 
 umop4a  za0.s, z0.b, {z16.b-z17.b}  // 10000001-00110000-10000000-00000000
 // CHECK-INST: umop4a  za0.s, z0.b, { z16.b, z17.b }
 // CHECK-ENCODING: [0x00,0x80,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81308000 <unknown>
 
 umop4a  za1.s, z10.b, {z20.b-z21.b}  // 10000001-00110100-10000001-01000001
 // CHECK-INST: umop4a  za1.s, z10.b, { z20.b, z21.b }
 // CHECK-ENCODING: [0x41,0x81,0x34,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81348141 <unknown>
 
 umop4a  za3.s, z14.b, {z30.b-z31.b}  // 10000001-00111110-10000001-11000011
 // CHECK-INST: umop4a  za3.s, z14.b, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc3,0x81,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 813e81c3 <unknown>
 
 umop4a  za0.s, {z0.b-z1.b}, z16.b  // 10000001-00100000-10000010-00000000
 // CHECK-INST: umop4a  za0.s, { z0.b, z1.b }, z16.b
 // CHECK-ENCODING: [0x00,0x82,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81208200 <unknown>
 
 umop4a  za1.s, {z10.b-z11.b}, z20.b  // 10000001-00100100-10000011-01000001
 // CHECK-INST: umop4a  za1.s, { z10.b, z11.b }, z20.b
 // CHECK-ENCODING: [0x41,0x83,0x24,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81248341 <unknown>
 
 umop4a  za3.s, {z14.b-z15.b}, z30.b  // 10000001-00101110-10000011-11000011
 // CHECK-INST: umop4a  za3.s, { z14.b, z15.b }, z30.b
 // CHECK-ENCODING: [0xc3,0x83,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 812e83c3 <unknown>
 
 umop4a  za0.s, {z0.b-z1.b}, {z16.b-z17.b}  // 10000001-00110000-10000010-00000000
 // CHECK-INST: umop4a  za0.s, { z0.b, z1.b }, { z16.b, z17.b }
 // CHECK-ENCODING: [0x00,0x82,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81308200 <unknown>
 
 umop4a  za1.s, {z10.b-z11.b}, {z20.b-z21.b}  // 10000001-00110100-10000011-01000001
 // CHECK-INST: umop4a  za1.s, { z10.b, z11.b }, { z20.b, z21.b }
 // CHECK-ENCODING: [0x41,0x83,0x34,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81348341 <unknown>
 
 umop4a  za3.s, {z14.b-z15.b}, {z30.b-z31.b}  // 10000001-00111110-10000011-11000011
 // CHECK-INST: umop4a  za3.s, { z14.b, z15.b }, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc3,0x83,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 813e83c3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/umop4s-64.s b/llvm/test/MC/AArch64/SME2p2/umop4s-64.s
index 5f39ca7cf373c1..9b6dfd71a2b8f6 100644
--- a/llvm/test/MC/AArch64/SME2p2/umop4s-64.s
+++ b/llvm/test/MC/AArch64/SME2p2/umop4s-64.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-i16i64 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-i16i64 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-i16i64 < %s \
@@ -15,71 +17,71 @@
 umop4s  za0.d, z0.h, z16.h  // 10100001-11100000-00000000-00011000
 // CHECK-INST: umop4s  za0.d, z0.h, z16.h
 // CHECK-ENCODING: [0x18,0x00,0xe0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1e00018 <unknown>
 
 umop4s  za5.d, z10.h, z20.h  // 10100001-11100100-00000001-01011101
 // CHECK-INST: umop4s  za5.d, z10.h, z20.h
 // CHECK-ENCODING: [0x5d,0x01,0xe4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1e4015d <unknown>
 
 umop4s  za7.d, z14.h, z30.h  // 10100001-11101110-00000001-11011111
 // CHECK-INST: umop4s  za7.d, z14.h, z30.h
 // CHECK-ENCODING: [0xdf,0x01,0xee,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1ee01df <unknown>
 
 umop4s  za0.d, z0.h, {z16.h-z17.h}  // 10100001-11110000-00000000-00011000
 // CHECK-INST: umop4s  za0.d, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x00,0xf0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1f00018 <unknown>
 
 umop4s  za5.d, z10.h, {z20.h-z21.h}  // 10100001-11110100-00000001-01011101
 // CHECK-INST: umop4s  za5.d, z10.h, { z20.h, z21.h }
 // CHECK-ENCODING: [0x5d,0x01,0xf4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1f4015d <unknown>
 
 umop4s  za7.d, z14.h, {z30.h-z31.h}  // 10100001-11111110-00000001-11011111
 // CHECK-INST: umop4s  za7.d, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xdf,0x01,0xfe,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1fe01df <unknown>
 
 umop4s  za0.d, {z0.h-z1.h}, z16.h  // 10100001-11100000-00000010-00011000
 // CHECK-INST: umop4s  za0.d, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x18,0x02,0xe0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1e00218 <unknown>
 
 umop4s  za5.d, {z10.h-z11.h}, z20.h  // 10100001-11100100-00000011-01011101
 // CHECK-INST: umop4s  za5.d, { z10.h, z11.h }, z20.h
 // CHECK-ENCODING: [0x5d,0x03,0xe4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1e4035d <unknown>
 
 umop4s  za7.d, {z14.h-z15.h}, z30.h  // 10100001-11101110-00000011-11011111
 // CHECK-INST: umop4s  za7.d, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xdf,0x03,0xee,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1ee03df <unknown>
 
 umop4s  za0.d, {z0.h-z1.h}, {z16.h-z17.h}  // 10100001-11110000-00000010-00011000
 // CHECK-INST: umop4s  za0.d, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x02,0xf0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1f00218 <unknown>
 
 umop4s  za5.d, {z10.h-z11.h}, {z20.h-z21.h}  // 10100001-11110100-00000011-01011101
 // CHECK-INST: umop4s  za5.d, { z10.h, z11.h }, { z20.h, z21.h }
 // CHECK-ENCODING: [0x5d,0x03,0xf4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1f4035d <unknown>
 
 umop4s  za7.d, {z14.h-z15.h}, {z30.h-z31.h}  // 10100001-11111110-00000011-11011111
 // CHECK-INST: umop4s  za7.d, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xdf,0x03,0xfe,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1fe03df <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/umop4s-8to32.s b/llvm/test/MC/AArch64/SME2p2/umop4s-8to32.s
index 74cbffc5ef01dc..12467e0d8f0da9 100644
--- a/llvm/test/MC/AArch64/SME2p2/umop4s-8to32.s
+++ b/llvm/test/MC/AArch64/SME2p2/umop4s-8to32.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,71 +17,71 @@
 umop4s  za0.s, z0.b, z16.b  // 10000001-00100000-10000000-00010000
 // CHECK-INST: umop4s  za0.s, z0.b, z16.b
 // CHECK-ENCODING: [0x10,0x80,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81208010 <unknown>
 
 umop4s  za1.s, z10.b, z20.b  // 10000001-00100100-10000001-01010001
 // CHECK-INST: umop4s  za1.s, z10.b, z20.b
 // CHECK-ENCODING: [0x51,0x81,0x24,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81248151 <unknown>
 
 umop4s  za3.s, z14.b, z30.b  // 10000001-00101110-10000001-11010011
 // CHECK-INST: umop4s  za3.s, z14.b, z30.b
 // CHECK-ENCODING: [0xd3,0x81,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 812e81d3 <unknown>
 
 umop4s  za0.s, z0.b, {z16.b-z17.b}  // 10000001-00110000-10000000-00010000
 // CHECK-INST: umop4s  za0.s, z0.b, { z16.b, z17.b }
 // CHECK-ENCODING: [0x10,0x80,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81308010 <unknown>
 
 umop4s  za1.s, z10.b, {z20.b-z21.b}  // 10000001-00110100-10000001-01010001
 // CHECK-INST: umop4s  za1.s, z10.b, { z20.b, z21.b }
 // CHECK-ENCODING: [0x51,0x81,0x34,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81348151 <unknown>
 
 umop4s  za3.s, z14.b, {z30.b-z31.b}  // 10000001-00111110-10000001-11010011
 // CHECK-INST: umop4s  za3.s, z14.b, { z30.b, z31.b }
 // CHECK-ENCODING: [0xd3,0x81,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 813e81d3 <unknown>
 
 umop4s  za0.s, {z0.b-z1.b}, z16.b  // 10000001-00100000-10000010-00010000
 // CHECK-INST: umop4s  za0.s, { z0.b, z1.b }, z16.b
 // CHECK-ENCODING: [0x10,0x82,0x20,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81208210 <unknown>
 
 umop4s  za1.s, {z10.b-z11.b}, z20.b  // 10000001-00100100-10000011-01010001
 // CHECK-INST: umop4s  za1.s, { z10.b, z11.b }, z20.b
 // CHECK-ENCODING: [0x51,0x83,0x24,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81248351 <unknown>
 
 umop4s  za3.s, {z14.b-z15.b}, z30.b  // 10000001-00101110-10000011-11010011
 // CHECK-INST: umop4s  za3.s, { z14.b, z15.b }, z30.b
 // CHECK-ENCODING: [0xd3,0x83,0x2e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 812e83d3 <unknown>
 
 umop4s  za0.s, {z0.b-z1.b}, {z16.b-z17.b}  // 10000001-00110000-10000010-00010000
 // CHECK-INST: umop4s  za0.s, { z0.b, z1.b }, { z16.b, z17.b }
 // CHECK-ENCODING: [0x10,0x82,0x30,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81308210 <unknown>
 
 umop4s  za1.s, {z10.b-z11.b}, {z20.b-z21.b}  // 10000001-00110100-10000011-01010001
 // CHECK-INST: umop4s  za1.s, { z10.b, z11.b }, { z20.b, z21.b }
 // CHECK-ENCODING: [0x51,0x83,0x34,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81348351 <unknown>
 
 umop4s  za3.s, {z14.b-z15.b}, {z30.b-z31.b}  // 10000001-00111110-10000011-11010011
 // CHECK-INST: umop4s  za3.s, { z14.b, z15.b }, { z30.b, z31.b }
 // CHECK-ENCODING: [0xd3,0x83,0x3e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 813e83d3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/usmop4a-32.s b/llvm/test/MC/AArch64/SME2p2/usmop4a-32.s
index 2bbddfd1e64e09..5090612d997e3b 100644
--- a/llvm/test/MC/AArch64/SME2p2/usmop4a-32.s
+++ b/llvm/test/MC/AArch64/SME2p2/usmop4a-32.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,71 +17,71 @@
 usmop4a za0.s, z0.b, z16.b  // 10000001-00000000-10000000-00000000
 // CHECK-INST: usmop4a za0.s, z0.b, z16.b
 // CHECK-ENCODING: [0x00,0x80,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81008000 <unknown>
 
 usmop4a za1.s, z10.b, z20.b  // 10000001-00000100-10000001-01000001
 // CHECK-INST: usmop4a za1.s, z10.b, z20.b
 // CHECK-ENCODING: [0x41,0x81,0x04,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81048141 <unknown>
 
 usmop4a za3.s, z14.b, z30.b  // 10000001-00001110-10000001-11000011
 // CHECK-INST: usmop4a za3.s, z14.b, z30.b
 // CHECK-ENCODING: [0xc3,0x81,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810e81c3 <unknown>
 
 usmop4a za0.s, z0.b, {z16.b-z17.b}  // 10000001-00010000-10000000-00000000
 // CHECK-INST: usmop4a za0.s, z0.b, { z16.b, z17.b }
 // CHECK-ENCODING: [0x00,0x80,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81108000 <unknown>
 
 usmop4a za1.s, z10.b, {z20.b-z21.b}  // 10000001-00010100-10000001-01000001
 // CHECK-INST: usmop4a za1.s, z10.b, { z20.b, z21.b }
 // CHECK-ENCODING: [0x41,0x81,0x14,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81148141 <unknown>
 
 usmop4a za3.s, z14.b, {z30.b-z31.b}  // 10000001-00011110-10000001-11000011
 // CHECK-INST: usmop4a za3.s, z14.b, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc3,0x81,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811e81c3 <unknown>
 
 usmop4a za0.s, {z0.b-z1.b}, z16.b  // 10000001-00000000-10000010-00000000
 // CHECK-INST: usmop4a za0.s, { z0.b, z1.b }, z16.b
 // CHECK-ENCODING: [0x00,0x82,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81008200 <unknown>
 
 usmop4a za1.s, {z10.b-z11.b}, z20.b  // 10000001-00000100-10000011-01000001
 // CHECK-INST: usmop4a za1.s, { z10.b, z11.b }, z20.b
 // CHECK-ENCODING: [0x41,0x83,0x04,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81048341 <unknown>
 
 usmop4a za3.s, {z14.b-z15.b}, z30.b  // 10000001-00001110-10000011-11000011
 // CHECK-INST: usmop4a za3.s, { z14.b, z15.b }, z30.b
 // CHECK-ENCODING: [0xc3,0x83,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810e83c3 <unknown>
 
 usmop4a za0.s, {z0.b-z1.b}, {z16.b-z17.b}  // 10000001-00010000-10000010-00000000
 // CHECK-INST: usmop4a za0.s, { z0.b, z1.b }, { z16.b, z17.b }
 // CHECK-ENCODING: [0x00,0x82,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81108200 <unknown>
 
 usmop4a za1.s, {z10.b-z11.b}, {z20.b-z21.b}  // 10000001-00010100-10000011-01000001
 // CHECK-INST: usmop4a za1.s, { z10.b, z11.b }, { z20.b, z21.b }
 // CHECK-ENCODING: [0x41,0x83,0x14,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81148341 <unknown>
 
 usmop4a za3.s, {z14.b-z15.b}, {z30.b-z31.b}  // 10000001-00011110-10000011-11000011
 // CHECK-INST: usmop4a za3.s, { z14.b, z15.b }, { z30.b, z31.b }
 // CHECK-ENCODING: [0xc3,0x83,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811e83c3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/usmop4a-64.s b/llvm/test/MC/AArch64/SME2p2/usmop4a-64.s
index 1da7b31d1b94f1..b82ca565235bfd 100644
--- a/llvm/test/MC/AArch64/SME2p2/usmop4a-64.s
+++ b/llvm/test/MC/AArch64/SME2p2/usmop4a-64.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-i16i64 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-i16i64 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-i16i64 < %s \
@@ -15,71 +17,71 @@
 usmop4a za0.d, z0.h, z16.h  // 10100001-11000000-00000000-00001000
 // CHECK-INST: usmop4a za0.d, z0.h, z16.h
 // CHECK-ENCODING: [0x08,0x00,0xc0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1c00008 <unknown>
 
 usmop4a za5.d, z10.h, z20.h  // 10100001-11000100-00000001-01001101
 // CHECK-INST: usmop4a za5.d, z10.h, z20.h
 // CHECK-ENCODING: [0x4d,0x01,0xc4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1c4014d <unknown>
 
 usmop4a za7.d, z14.h, z30.h  // 10100001-11001110-00000001-11001111
 // CHECK-INST: usmop4a za7.d, z14.h, z30.h
 // CHECK-ENCODING: [0xcf,0x01,0xce,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1ce01cf <unknown>
 
 usmop4a za0.d, z0.h, {z16.h-z17.h}  // 10100001-11010000-00000000-00001000
 // CHECK-INST: usmop4a za0.d, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x00,0xd0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1d00008 <unknown>
 
 usmop4a za5.d, z10.h, {z20.h-z21.h}  // 10100001-11010100-00000001-01001101
 // CHECK-INST: usmop4a za5.d, z10.h, { z20.h, z21.h }
 // CHECK-ENCODING: [0x4d,0x01,0xd4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1d4014d <unknown>
 
 usmop4a za7.d, z14.h, {z30.h-z31.h}  // 10100001-11011110-00000001-11001111
 // CHECK-INST: usmop4a za7.d, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcf,0x01,0xde,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1de01cf <unknown>
 
 usmop4a za0.d, {z0.h-z1.h}, z16.h  // 10100001-11000000-00000010-00001000
 // CHECK-INST: usmop4a za0.d, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x08,0x02,0xc0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1c00208 <unknown>
 
 usmop4a za5.d, {z10.h-z11.h}, z20.h  // 10100001-11000100-00000011-01001101
 // CHECK-INST: usmop4a za5.d, { z10.h, z11.h }, z20.h
 // CHECK-ENCODING: [0x4d,0x03,0xc4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1c4034d <unknown>
 
 usmop4a za7.d, {z14.h-z15.h}, z30.h  // 10100001-11001110-00000011-11001111
 // CHECK-INST: usmop4a za7.d, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xcf,0x03,0xce,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1ce03cf <unknown>
 
 usmop4a za0.d, {z0.h-z1.h}, {z16.h-z17.h}  // 10100001-11010000-00000010-00001000
 // CHECK-INST: usmop4a za0.d, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x08,0x02,0xd0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1d00208 <unknown>
 
 usmop4a za5.d, {z10.h-z11.h}, {z20.h-z21.h}  // 10100001-11010100-00000011-01001101
 // CHECK-INST: usmop4a za5.d, { z10.h, z11.h }, { z20.h, z21.h }
 // CHECK-ENCODING: [0x4d,0x03,0xd4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1d4034d <unknown>
 
 usmop4a za7.d, {z14.h-z15.h}, {z30.h-z31.h}  // 10100001-11011110-00000011-11001111
 // CHECK-INST: usmop4a za7.d, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xcf,0x03,0xde,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1de03cf <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/usmop4s-32.s b/llvm/test/MC/AArch64/SME2p2/usmop4s-32.s
index e8cc918e55d029..dda22d8deb9ccc 100644
--- a/llvm/test/MC/AArch64/SME2p2/usmop4s-32.s
+++ b/llvm/test/MC/AArch64/SME2p2/usmop4s-32.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,71 +17,71 @@
 usmop4s za0.s, z0.b, z16.b  // 10000001-00000000-10000000-00010000
 // CHECK-INST: usmop4s za0.s, z0.b, z16.b
 // CHECK-ENCODING: [0x10,0x80,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81008010 <unknown>
 
 usmop4s za1.s, z10.b, z20.b  // 10000001-00000100-10000001-01010001
 // CHECK-INST: usmop4s za1.s, z10.b, z20.b
 // CHECK-ENCODING: [0x51,0x81,0x04,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81048151 <unknown>
 
 usmop4s za3.s, z14.b, z30.b  // 10000001-00001110-10000001-11010011
 // CHECK-INST: usmop4s za3.s, z14.b, z30.b
 // CHECK-ENCODING: [0xd3,0x81,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810e81d3 <unknown>
 
 usmop4s za0.s, z0.b, {z16.b-z17.b}  // 10000001-00010000-10000000-00010000
 // CHECK-INST: usmop4s za0.s, z0.b, { z16.b, z17.b }
 // CHECK-ENCODING: [0x10,0x80,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81108010 <unknown>
 
 usmop4s za1.s, z10.b, {z20.b-z21.b}  // 10000001-00010100-10000001-01010001
 // CHECK-INST: usmop4s za1.s, z10.b, { z20.b, z21.b }
 // CHECK-ENCODING: [0x51,0x81,0x14,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81148151 <unknown>
 
 usmop4s za3.s, z14.b, {z30.b-z31.b}  // 10000001-00011110-10000001-11010011
 // CHECK-INST: usmop4s za3.s, z14.b, { z30.b, z31.b }
 // CHECK-ENCODING: [0xd3,0x81,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811e81d3 <unknown>
 
 usmop4s za0.s, {z0.b-z1.b}, z16.b  // 10000001-00000000-10000010-00010000
 // CHECK-INST: usmop4s za0.s, { z0.b, z1.b }, z16.b
 // CHECK-ENCODING: [0x10,0x82,0x00,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81008210 <unknown>
 
 usmop4s za1.s, {z10.b-z11.b}, z20.b  // 10000001-00000100-10000011-01010001
 // CHECK-INST: usmop4s za1.s, { z10.b, z11.b }, z20.b
 // CHECK-ENCODING: [0x51,0x83,0x04,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81048351 <unknown>
 
 usmop4s za3.s, {z14.b-z15.b}, z30.b  // 10000001-00001110-10000011-11010011
 // CHECK-INST: usmop4s za3.s, { z14.b, z15.b }, z30.b
 // CHECK-ENCODING: [0xd3,0x83,0x0e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 810e83d3 <unknown>
 
 usmop4s za0.s, {z0.b-z1.b}, {z16.b-z17.b}  // 10000001-00010000-10000010-00010000
 // CHECK-INST: usmop4s za0.s, { z0.b, z1.b }, { z16.b, z17.b }
 // CHECK-ENCODING: [0x10,0x82,0x10,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81108210 <unknown>
 
 usmop4s za1.s, {z10.b-z11.b}, {z20.b-z21.b}  // 10000001-00010100-10000011-01010001
 // CHECK-INST: usmop4s za1.s, { z10.b, z11.b }, { z20.b, z21.b }
 // CHECK-ENCODING: [0x51,0x83,0x14,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 81148351 <unknown>
 
 usmop4s za3.s, {z14.b-z15.b}, {z30.b-z31.b}  // 10000001-00011110-10000011-11010011
 // CHECK-INST: usmop4s za3.s, { z14.b, z15.b }, { z30.b, z31.b }
 // CHECK-ENCODING: [0xd3,0x83,0x1e,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: 811e83d3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/usmop4s-64.s b/llvm/test/MC/AArch64/SME2p2/usmop4s-64.s
index 22df9e07158d2b..b839e265142f2e 100644
--- a/llvm/test/MC/AArch64/SME2p2/usmop4s-64.s
+++ b/llvm/test/MC/AArch64/SME2p2/usmop4s-64.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2,+sme-i16i64 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-mop4,+sme-i16i64 < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2,+sme-i16i64 < %s \
@@ -15,71 +17,71 @@
 usmop4s za0.d, z0.h, z16.h  // 10100001-11000000-00000000-00011000
 // CHECK-INST: usmop4s za0.d, z0.h, z16.h
 // CHECK-ENCODING: [0x18,0x00,0xc0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1c00018 <unknown>
 
 usmop4s za5.d, z10.h, z20.h  // 10100001-11000100-00000001-01011101
 // CHECK-INST: usmop4s za5.d, z10.h, z20.h
 // CHECK-ENCODING: [0x5d,0x01,0xc4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1c4015d <unknown>
 
 usmop4s za7.d, z14.h, z30.h  // 10100001-11001110-00000001-11011111
 // CHECK-INST: usmop4s za7.d, z14.h, z30.h
 // CHECK-ENCODING: [0xdf,0x01,0xce,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1ce01df <unknown>
 
 usmop4s za0.d, z0.h, {z16.h-z17.h}  // 10100001-11010000-00000000-00011000
 // CHECK-INST: usmop4s za0.d, z0.h, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x00,0xd0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1d00018 <unknown>
 
 usmop4s za5.d, z10.h, {z20.h-z21.h}  // 10100001-11010100-00000001-01011101
 // CHECK-INST: usmop4s za5.d, z10.h, { z20.h, z21.h }
 // CHECK-ENCODING: [0x5d,0x01,0xd4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1d4015d <unknown>
 
 usmop4s za7.d, z14.h, {z30.h-z31.h}  // 10100001-11011110-00000001-11011111
 // CHECK-INST: usmop4s za7.d, z14.h, { z30.h, z31.h }
 // CHECK-ENCODING: [0xdf,0x01,0xde,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1de01df <unknown>
 
 usmop4s za0.d, {z0.h-z1.h}, z16.h  // 10100001-11000000-00000010-00011000
 // CHECK-INST: usmop4s za0.d, { z0.h, z1.h }, z16.h
 // CHECK-ENCODING: [0x18,0x02,0xc0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1c00218 <unknown>
 
 usmop4s za5.d, {z10.h-z11.h}, z20.h  // 10100001-11000100-00000011-01011101
 // CHECK-INST: usmop4s za5.d, { z10.h, z11.h }, z20.h
 // CHECK-ENCODING: [0x5d,0x03,0xc4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1c4035d <unknown>
 
 usmop4s za7.d, {z14.h-z15.h}, z30.h  // 10100001-11001110-00000011-11011111
 // CHECK-INST: usmop4s za7.d, { z14.h, z15.h }, z30.h
 // CHECK-ENCODING: [0xdf,0x03,0xce,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1ce03df <unknown>
 
 usmop4s za0.d, {z0.h-z1.h}, {z16.h-z17.h}  // 10100001-11010000-00000010-00011000
 // CHECK-INST: usmop4s za0.d, { z0.h, z1.h }, { z16.h, z17.h }
 // CHECK-ENCODING: [0x18,0x02,0xd0,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1d00218 <unknown>
 
 usmop4s za5.d, {z10.h-z11.h}, {z20.h-z21.h}  // 10100001-11010100-00000011-01011101
 // CHECK-INST: usmop4s za5.d, { z10.h, z11.h }, { z20.h, z21.h }
 // CHECK-ENCODING: [0x5d,0x03,0xd4,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1d4035d <unknown>
 
 usmop4s za7.d, {z14.h-z15.h}, {z30.h-z31.h}  // 10100001-11011110-00000011-11011111
 // CHECK-INST: usmop4s za7.d, { z14.h, z15.h }, { z30.h, z31.h }
 // CHECK-ENCODING: [0xdf,0x03,0xde,0xa1]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-mop4
 // CHECK-UNKNOWN: a1de03df <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/ustmopa.s b/llvm/test/MC/AArch64/SME2p2/ustmopa.s
index 626b5b436dcb76..579c508970137a 100644
--- a/llvm/test/MC/AArch64/SME2p2/ustmopa.s
+++ b/llvm/test/MC/AArch64/SME2p2/ustmopa.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-tmop < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,17 +17,17 @@
 ustmopa za0.s, {z0.b-z1.b}, z0.b, z20[0]  // 10000001-01000000-10000000-00000000
 // CHECK-INST: ustmopa za0.s, { z0.b, z1.b }, z0.b, z20[0]
 // CHECK-ENCODING: [0x00,0x80,0x40,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 81408000 <unknown>
 
 ustmopa za3.s, {z12.b-z13.b}, z8.b, z23[3]  // 10000001-01001000-10001101-10110011
 // CHECK-INST: ustmopa za3.s, { z12.b, z13.b }, z8.b, z23[3]
 // CHECK-ENCODING: [0xb3,0x8d,0x48,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 81488db3 <unknown>
 
 ustmopa za3.s, {z30.b-z31.b}, z31.b, z31[3]  // 10000001-01011111-10011111-11110011
 // CHECK-INST: ustmopa za3.s, { z30.b, z31.b }, z31.b, z31[3]
 // CHECK-ENCODING: [0xf3,0x9f,0x5f,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 815f9ff3 <unknown>
diff --git a/llvm/test/MC/AArch64/SME2p2/utmopa.s b/llvm/test/MC/AArch64/SME2p2/utmopa.s
index bd127e59ece083..38216c3e9fb4d3 100644
--- a/llvm/test/MC/AArch64/SME2p2/utmopa.s
+++ b/llvm/test/MC/AArch64/SME2p2/utmopa.s
@@ -1,5 +1,7 @@
 // RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2p2 < %s \
 // RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+sme-tmop < %s \
+// RUN:        | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
 // RUN: not llvm-mc -triple=aarch64 -show-encoding < %s 2>&1 \
 // RUN:        | FileCheck %s --check-prefix=CHECK-ERROR
 // RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+sme2p2 < %s \
@@ -15,35 +17,35 @@
 utmopa  za0.s, {z0.h-z1.h}, z0.h, z20[0]  // 10000001-01000000-10000000-00001000
 // CHECK-INST: utmopa  za0.s, { z0.h, z1.h }, z0.h, z20[0]
 // CHECK-ENCODING: [0x08,0x80,0x40,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 81408008 <unknown>
 
 utmopa  za3.s, {z12.h-z13.h}, z8.h, z23[3]  // 10000001-01001000-10001101-10111011
 // CHECK-INST: utmopa  za3.s, { z12.h, z13.h }, z8.h, z23[3]
 // CHECK-ENCODING: [0xbb,0x8d,0x48,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 81488dbb <unknown>
 
 utmopa  za3.s, {z30.h-z31.h}, z31.h, z31[3]  // 10000001-01011111-10011111-11111011
 // CHECK-INST: utmopa  za3.s, { z30.h, z31.h }, z31.h, z31[3]
 // CHECK-ENCODING: [0xfb,0x9f,0x5f,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 815f9ffb <unknown>
 
 utmopa  za0.s, {z0.b-z1.b}, z0.b, z20[0]  // 10000001-01100000-10000000-00000000
 // CHECK-INST: utmopa  za0.s, { z0.b, z1.b }, z0.b, z20[0]
 // CHECK-ENCODING: [0x00,0x80,0x60,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 81608000 <unknown>
 
 utmopa  za3.s, {z12.b-z13.b}, z8.b, z23[3]  // 10000001-01101000-10001101-10110011
 // CHECK-INST: utmopa  za3.s, { z12.b, z13.b }, z8.b, z23[3]
 // CHECK-ENCODING: [0xb3,0x8d,0x68,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 81688db3 <unknown>
 
 utmopa  za3.s, {z30.b-z31.b}, z31.b, z31[3]  // 10000001-01111111-10011111-11110011
 // CHECK-INST: utmopa  za3.s, { z30.b, z31.b }, z31.b, z31[3]
 // CHECK-ENCODING: [0xf3,0x9f,0x7f,0x81]
-// CHECK-ERROR: instruction requires: sme2p2
+// CHECK-ERROR: instruction requires: sme2p2 or sme-tmop
 // CHECK-UNKNOWN: 817f9ff3 <unknown>
diff --git a/llvm/unittests/TargetParser/TargetParserTest.cpp b/llvm/unittests/TargetParser/TargetParserTest.cpp
index 1f69190e4bec53..89714545f35822 100644
--- a/llvm/unittests/TargetParser/TargetParserTest.cpp
+++ b/llvm/unittests/TargetParser/TargetParserTest.cpp
@@ -1343,7 +1343,9 @@ TEST(TargetParserTest, AArch64ExtensionFeatures) {
       AArch64::AEK_FPRCVT,       AArch64::AEK_CMPBR,
       AArch64::AEK_LSUI,         AArch64::AEK_OCCMO,
       AArch64::AEK_PCDPHINT,     AArch64::AEK_POPS,
-      AArch64::AEK_SVEAES};
+      AArch64::AEK_SVEAES,       AArch64::AEK_SME_MOP4,
+      AArch64::AEK_SME_TMOP,
+  };
 
   std::vector<StringRef> Features;
 
@@ -1448,6 +1450,8 @@ TEST(TargetParserTest, AArch64ExtensionFeatures) {
   EXPECT_TRUE(llvm::is_contained(Features, "+occmo"));
   EXPECT_TRUE(llvm::is_contained(Features, "+pcdphint"));
   EXPECT_TRUE(llvm::is_contained(Features, "+pops"));
+  EXPECT_TRUE(llvm::is_contained(Features, "+sme-mop4"));
+  EXPECT_TRUE(llvm::is_contained(Features, "+sme-tmop"));
 
   // Assuming we listed every extension above, this should produce the same
   // result.
@@ -1605,6 +1609,8 @@ TEST(TargetParserTest, AArch64ArchExtFeature) {
       {"occmo", "nooccmo", "+occmo", "-occmo"},
       {"pcdphint", "nopcdphint", "+pcdphint", "-pcdphint"},
       {"pops", "nopops", "+pops", "-pops"},
+      {"sme-mop4", "nosme-mop4", "+sme-mop4", "-sme-mop4"},
+      {"sme-tmop", "nosme-tmop", "+sme-tmop", "-sme-tmop"},
   };
 
   for (unsigned i = 0; i < std::size(ArchExt); i++) {
@@ -2033,4 +2039,4 @@ INSTANTIATE_TEST_SUITE_P(
     AArch64ExtensionDependenciesBaseCPUTestFixture,
     ::testing::ValuesIn(AArch64ExtensionDependenciesCPUData));
 
-} // namespace
\ No newline at end of file
+} // namespace



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