[llvm] [LLVM][AArch64][Assembly]: Add FAMINMAX assembly/disasse… (PR #70115)
via llvm-commits
llvm-commits at lists.llvm.org
Tue Oct 24 13:19:47 PDT 2023
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-aarch64
Author: None (hassnaaHamdi)
<details>
<summary>Changes</summary>
…mbly.
This patch adds the feature flag FAMINMAX and the assembly/disassembly for the following instructions of NEON, SVE2 and SME2:
* NEON:
- FAMIN
- FAMAX
* SVE2:
- FAMIN_ZPmZ
- FAMAX_ZPmZ
* SME2:
- FAMAX_2Z2Z
- FAMIN_2Z2Z
- FAMAX_4Z4Z
- FAMIN_4Z4Z
That is according to this documentation:
https://developer.arm.com/documentation/ddi0602/2023-09
---
Patch is 42.37 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/70115.diff
17 Files Affected:
- (modified) llvm/include/llvm/TargetParser/AArch64TargetParser.h (+2)
- (modified) llvm/lib/Target/AArch64/AArch64.td (+3)
- (modified) llvm/lib/Target/AArch64/AArch64InstrInfo.td (+11)
- (modified) llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td (+8)
- (modified) llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td (+6)
- (modified) llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp (+1)
- (added) llvm/test/MC/AArch64/FP8/directive-arch-negative.s (+8)
- (added) llvm/test/MC/AArch64/FP8/directive-arch.s (+8)
- (added) llvm/test/MC/AArch64/FP8/faminmax-diagnostics.s (+64)
- (added) llvm/test/MC/AArch64/FP8/faminmax.s (+197)
- (added) llvm/test/MC/AArch64/FP8_SME2/faminmax-diagnoctics.s (+62)
- (added) llvm/test/MC/AArch64/FP8_SME2/faminmax.s (+159)
- (added) llvm/test/MC/AArch64/FP8_SVE2/famax-diagnostics.s (+49)
- (added) llvm/test/MC/AArch64/FP8_SVE2/famax.s (+88)
- (added) llvm/test/MC/AArch64/FP8_SVE2/famin-diagnostics.s (+49)
- (added) llvm/test/MC/AArch64/FP8_SVE2/famin.s (+88)
- (modified) llvm/unittests/TargetParser/TargetParserTest.cpp (+3)
``````````diff
diff --git a/llvm/include/llvm/TargetParser/AArch64TargetParser.h b/llvm/include/llvm/TargetParser/AArch64TargetParser.h
index bf14473f133fab7..710bea3540f0938 100644
--- a/llvm/include/llvm/TargetParser/AArch64TargetParser.h
+++ b/llvm/include/llvm/TargetParser/AArch64TargetParser.h
@@ -160,6 +160,7 @@ enum ArchExtKind : unsigned {
AEK_ITE = 56, // FEAT_ITE
AEK_GCS = 57, // FEAT_GCS
AEK_FPMR = 58, // FEAT_FPMR
+ AEK_FAMINMAX = 59, // FEAT_FAMINMAX
AEK_NUM_EXTENSIONS
};
using ExtensionBitset = Bitset<AEK_NUM_EXTENSIONS>;
@@ -269,6 +270,7 @@ inline constexpr ExtensionInfo Extensions[] = {
{"wfxt", AArch64::AEK_NONE, {}, {}, FEAT_WFXT, "+wfxt", 550},
{"gcs", AArch64::AEK_GCS, "+gcs", "-gcs", FEAT_INIT, "", 0},
{"fpmr", AArch64::AEK_FPMR, "+fpmr", "-fpmr", FEAT_INIT, "", 0},
+ {"faminmax", AArch64::AEK_FAMINMAX, "+faminmax", "-faminmax", FEAT_INIT, "", 0},
// Special cases
{"none", AArch64::AEK_NONE, {}, {}, FEAT_INIT, "", ExtensionInfo::MaxFMVPriority},
};
diff --git a/llvm/lib/Target/AArch64/AArch64.td b/llvm/lib/Target/AArch64/AArch64.td
index ced1d4389203653..45cc11b8505774e 100644
--- a/llvm/lib/Target/AArch64/AArch64.td
+++ b/llvm/lib/Target/AArch64/AArch64.td
@@ -511,6 +511,9 @@ def FeatureSME2 : SubtargetFeature<"sme2", "HasSME2", "true",
def FeatureSME2p1 : SubtargetFeature<"sme2p1", "HasSME2p1", "true",
"Enable Scalable Matrix Extension 2.1 (FEAT_SME2p1) instructions", [FeatureSME2]>;
+def FeatureFAMINMAX: SubtargetFeature<"faminmax", "HasFAMINMAX", "true",
+ "Enable FAMIN and FAMAX instructions (FEAT_FAMINMAX)">;
+
def FeatureAppleA7SysReg : SubtargetFeature<"apple-a7-sysreg", "HasAppleA7SysReg", "true",
"Apple A7 (the CPU formerly known as Cyclone)">;
diff --git a/llvm/lib/Target/AArch64/AArch64InstrInfo.td b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
index 382d3956f105f8c..528a4d984dd06ca 100644
--- a/llvm/lib/Target/AArch64/AArch64InstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64InstrInfo.td
@@ -162,6 +162,8 @@ def HasSME2p1 : Predicate<"Subtarget->hasSME2p1()">,
AssemblerPredicateWithAll<(all_of FeatureSME2p1), "sme2p1">;
def HasFPMR : Predicate<"Subtarget->hasFPMR()">,
AssemblerPredicateWithAll<(all_of FeatureFPMR), "fpmr">;
+def HasFAMINMAX : Predicate<"Subtarget->hasFAMINMAX()">,
+ AssemblerPredicateWithAll<(all_of FeatureFAMINMAX), "faminmax">;
// A subset of SVE(2) instructions are legal in Streaming SVE execution mode,
// they should be enabled if either has been specified.
@@ -173,6 +175,10 @@ def HasSVE2orSME
: Predicate<"Subtarget->hasSVE2() || Subtarget->hasSME()">,
AssemblerPredicateWithAll<(any_of FeatureSVE2, FeatureSME),
"sve2 or sme">;
+def HasSVE2orSME2
+ : Predicate<"Subtarget->hasSVE2() || Subtarget->hasSME2()">,
+ AssemblerPredicateWithAll<(any_of FeatureSVE2, FeatureSME2),
+ "sve2 or sme2">;
def HasSVE2p1_or_HasSME
: Predicate<"Subtarget->hasSVE2p1() || Subtarget->hasSME()">,
AssemblerPredicateWithAll<(any_of FeatureSME, FeatureSVE2p1), "sme or sve2p1">;
@@ -9249,6 +9255,11 @@ let Predicates = [HasD128] in {
}
}
+let Predicates = [HasFAMINMAX] in {
+ defm FAMAX : SIMDThreeSameVectorFP<0b0, 0b1, 0b011, "famax", null_frag>;
+ defm FAMIN : SIMDThreeSameVectorFP<0b1, 0b1, 0b011, "famin", null_frag>;
+} // End let Predicates = [HasFAMAXMIN]
+
include "AArch64InstrAtomics.td"
include "AArch64SVEInstrInfo.td"
diff --git a/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td b/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
index 2685f2e3c8108e5..9e6b773dd283882 100644
--- a/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
@@ -855,3 +855,11 @@ defm BFCLAMP_VG4_4ZZZ: sme2p1_bfclamp_vector_vg4_multi<"bfclamp">;
defm BFMOPA_MPPZZ_H : sme2p1_fmop_tile_fp16<"bfmopa", 0b1, 0b0, 0b11, ZPR16>;
defm BFMOPS_MPPZZ_H : sme2p1_fmop_tile_fp16<"bfmops", 0b1, 0b1, 0b11, ZPR16>;
}
+
+let Predicates = [HasSME2, HasFAMINMAX] in {
+defm FAMAX_2Z2Z : sme2_fp_sve_destructive_vector_vg2_multi<"famax", 0b0010100>;
+defm FAMIN_2Z2Z : sme2_fp_sve_destructive_vector_vg2_multi<"famin", 0b0010101>;
+
+defm FAMAX_4Z4Z : sme2_fp_sve_destructive_vector_vg4_multi<"famax", 0b0010100>;
+defm FAMIN_4Z4Z : sme2_fp_sve_destructive_vector_vg4_multi<"famin", 0b0010101>;
+} //[HasSME2, HasFAMINMAX]
\ No newline at end of file
diff --git a/llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td b/llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
index d599ac4689e5cb3..eba7cfd6bb65e0c 100644
--- a/llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
+++ b/llvm/lib/Target/AArch64/AArch64SVEInstrInfo.td
@@ -4002,3 +4002,9 @@ defm UZPQ1_ZZZ : sve2p1_permute_vec_elems_q<0b010, "uzpq1">;
defm UZPQ2_ZZZ : sve2p1_permute_vec_elems_q<0b011, "uzpq2">;
defm TBLQ_ZZZ : sve2p1_tblq<"tblq">;
} // End HasSVE2p1_or_HasSME2p1
+
+let Predicates = [HasSVE2orSME2, HasFAMINMAX] in {
+// FP8 Arithmetic - Predicated Group
+defm FAMIN_ZPmZ : sve_fp_2op_p_zds<0b1111, "famin", "", null_frag, DestructiveOther>;
+defm FAMAX_ZPmZ : sve_fp_2op_p_zds<0b1110, "famax", "", null_frag, DestructiveOther>;
+} // End HasSVE2orSME2, HasFAMINMAX
\ No newline at end of file
diff --git a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
index 6e70deec3f89092..b0a56c861d7500d 100644
--- a/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
+++ b/llvm/lib/Target/AArch64/AsmParser/AArch64AsmParser.cpp
@@ -3639,6 +3639,7 @@ static const struct Extension {
{"ssbs", {AArch64::FeatureSSBS}},
{"tme", {AArch64::FeatureTME}},
{"fpmr", {AArch64::FeatureFPMR}},
+ {"faminmax", {AArch64::FeatureFAMINMAX}},
};
static void setRequiredFeatureString(FeatureBitset FBS, std::string &Str) {
diff --git a/llvm/test/MC/AArch64/FP8/directive-arch-negative.s b/llvm/test/MC/AArch64/FP8/directive-arch-negative.s
new file mode 100644
index 000000000000000..86aeb7546f7d458
--- /dev/null
+++ b/llvm/test/MC/AArch64/FP8/directive-arch-negative.s
@@ -0,0 +1,8 @@
+// RUN: not llvm-mc -triple aarch64 -filetype asm -o - %s 2>&1 | FileCheck %s
+
+.arch armv9-a+faminmax
+.arch armv9-a+nofaminmax
+famax v31.4h, v31.4h, v31.4h
+// CHECK: error: instruction requires: faminmax
+// CHECK: famax v31.4h, v31.4h, v31.4h
+
diff --git a/llvm/test/MC/AArch64/FP8/directive-arch.s b/llvm/test/MC/AArch64/FP8/directive-arch.s
new file mode 100644
index 000000000000000..1f3c918946297bb
--- /dev/null
+++ b/llvm/test/MC/AArch64/FP8/directive-arch.s
@@ -0,0 +1,8 @@
+// RUN: llvm-mc -triple aarch64 -o - %s 2>&1 | FileCheck %s
+
+.arch armv9-a+faminmax
+famax v31.4h, v31.4h, v31.4h
+// CHECK: famax v31.4h, v31.4h, v31.4h
+
+.arch armv9-a+nofaminmax
+
diff --git a/llvm/test/MC/AArch64/FP8/faminmax-diagnostics.s b/llvm/test/MC/AArch64/FP8/faminmax-diagnostics.s
new file mode 100644
index 000000000000000..724b7eadfb4162a
--- /dev/null
+++ b/llvm/test/MC/AArch64/FP8/faminmax-diagnostics.s
@@ -0,0 +1,64 @@
+// RUN: not llvm-mc -triple=aarch64 -show-encoding -mattr=+faminmax 2>&1 < %s| FileCheck %s
+
+// --------------------------------------------------------------------------//
+// Element size extension incorrect
+
+famax v0.16s, v0.4s, v0.4s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid vector kind qualifier
+// CHECK-NEXT: famax v0.16s, v0.4s, v0.4s
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famax v0.4h, v0.4s, v0.4s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// CHECK-NEXT: famax v0.4h, v0.4s, v0.4s
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famax v0.8h, v0.8s, v0.8s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid vector kind qualifier
+// CHECK-NEXT: famax v0.8h, v0.8s, v0.8s
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famax v0.2s, v0.2h, v0.2h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// CHECK-NEXT: famax v0.2s, v0.2h, v0.2h
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famax v0.4s, v31.4h, v0.4h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// CHECK-NEXT: famax v0.4s, v31.4h, v0.4h
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famax v0.2d, v31.2h, v0.2h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// CHECK-NEXT: famax v0.2d, v31.2h, v0.2h
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famin v0.16s, v0.4s, v0.4s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid vector kind qualifier
+// CHECK-NEXT: famin v0.16s, v0.4s, v0.4s
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famin v0.4h, v0.4s, v0.4s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// CHECK-NEXT: famin v0.4h, v0.4s, v0.4s
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famin v0.8h, v0.8s, v0.8s
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid vector kind qualifier
+// CHECK-NEXT: famin v0.8h, v0.8s, v0.8s
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famin v0.2s, v0.2h, v0.2h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// CHECK-NEXT: famin v0.2s, v0.2h, v0.2h
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famin v0.4s, v31.4h, v0.4h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// CHECK-NEXT: famin v0.4s, v31.4h, v0.4h
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famin v0.2d, v31.2h, v0.2h
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// CHECK-NEXT: famin v0.2d, v31.2h, v0.2h
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
diff --git a/llvm/test/MC/AArch64/FP8/faminmax.s b/llvm/test/MC/AArch64/FP8/faminmax.s
new file mode 100644
index 000000000000000..02c3b8f11d6ee6a
--- /dev/null
+++ b/llvm/test/MC/AArch64/FP8/faminmax.s
@@ -0,0 +1,197 @@
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+faminmax < %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=+faminmax < %s \
+// RUN: | llvm-objdump -d --mattr=+faminmax - | FileCheck %s --check-prefix=CHECK-INST
+// RUN: llvm-mc -triple=aarch64 -filetype=obj -mattr=+faminmax < %s \
+// RUN: | llvm-objdump -d --mattr=-faminmax - | FileCheck %s --check-prefix=CHECK-UNKNOWN
+// Disassemble encoding and check the re-encoding (-show-encoding) matches.
+// RUN: llvm-mc -triple=aarch64 -show-encoding -mattr=+faminmax < %s \
+// RUN: | sed '/.text/d' | sed 's/.*encoding: //g' \
+// RUN: | llvm-mc -triple=aarch64 -mattr=+faminmax -disassemble -show-encoding \
+// RUN: | FileCheck %s --check-prefixes=CHECK-ENCODING,CHECK-INST
+
+/// FAMAX instructions.
+famax v31.4h, v31.4h, v31.4h
+// CHECK-INST: famax v31.4h, v31.4h, v31.4h
+// CHECK-ENCODING: [0xff,0x1f,0xdf,0x0e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 0edf1fff <unknown>
+
+famax v31.4h, v0.4h, v31.4h
+// CHECK-INST: famax v31.4h, v0.4h, v31.4h
+// CHECK-ENCODING: [0x1f,0x1c,0xdf,0x0e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 0edf1c1f <unknown>
+
+famax v0.4h, v0.4h, v0.4h
+// CHECK-INST: famax v0.4h, v0.4h, v0.4h
+// CHECK-ENCODING: [0x00,0x1c,0xc0,0x0e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 0ec01c00 <unknown>
+
+famax v31.8h, v31.8h, v31.8h
+// CHECK-INST: famax v31.8h, v31.8h, v31.8h
+// CHECK-ENCODING: [0xff,0x1f,0xdf,0x4e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 4edf1fff <unknown>
+
+famax v31.8h, v31.8h, v0.8h
+// CHECK-INST: famax v31.8h, v31.8h, v0.8h
+// CHECK-ENCODING: [0xff,0x1f,0xc0,0x4e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 4ec01fff <unknown>
+
+famax v0.8h, v0.8h, v0.8h
+// CHECK-INST: famax v0.8h, v0.8h, v0.8h
+// CHECK-ENCODING: [0x00,0x1c,0xc0,0x4e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 4ec01c00 <unknown>
+
+famax v31.2s, v31.2s, v31.2s
+// CHECK-INST: famax v31.2s, v31.2s, v31.2s
+// CHECK-ENCODING: [0xff,0xdf,0xbf,0x0e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 0ebfdfff <unknown>
+
+famax v31.2s, v0.2s, v0.2s
+// CHECK-INST: famax v31.2s, v0.2s, v0.2s
+// CHECK-ENCODING: [0x1f,0xdc,0xa0,0x0e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 0ea0dc1f <unknown>
+
+famax v0.2s, v0.2s, v0.2s
+// CHECK-INST: famax v0.2s, v0.2s, v0.2s
+// CHECK-ENCODING: [0x00,0xdc,0xa0,0x0e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 0ea0dc00 <unknown>
+
+famax v31.4s, v31.4s, v31.4s
+// CHECK-INST: famax v31.4s, v31.4s, v31.4s
+// CHECK-ENCODING: [0xff,0xdf,0xbf,0x4e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 4ebfdfff <unknown>
+
+famax v0.4s, v31.4s, v31.4s
+// CHECK-INST: famax v0.4s, v31.4s, v31.4s
+// CHECK-ENCODING: [0xe0,0xdf,0xbf,0x4e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 4ebfdfe0 <unknown>
+
+famax v0.4s, v0.4s, v0.4s
+// CHECK-INST: famax v0.4s, v0.4s, v0.4s
+// CHECK-ENCODING: [0x00,0xdc,0xa0,0x4e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 4ea0dc00 <unknown>
+
+famax v31.2d, v31.2d, v31.2d
+// CHECK-INST: famax v31.2d, v31.2d, v31.2d
+// CHECK-ENCODING: [0xff,0xdf,0xff,0x4e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 4effdfff <unknown>
+
+famax v0.2d, v0.2d, v31.2d
+// CHECK-INST: famax v0.2d, v0.2d, v31.2d
+// CHECK-ENCODING: [0x00,0xdc,0xff,0x4e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 4effdc00 <unknown>
+
+famax v0.2d, v0.2d, v0.2d
+// CHECK-INST: famax v0.2d, v0.2d, v0.2d
+// CHECK-ENCODING: [0x00,0xdc,0xe0,0x4e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 4ee0dc00 <unknown>
+
+
+/// FAMIN instructions.
+famin v31.4h, v31.4h, v31.4h
+// CHECK-INST: famin v31.4h, v31.4h, v31.4h
+// CHECK-ENCODING: [0xff,0x1f,0xdf,0x2e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 2edf1fff <unknown>
+
+famin v31.4h, v0.4h, v31.4h
+// CHECK-INST: famin v31.4h, v0.4h, v31.4h
+// CHECK-ENCODING: [0x1f,0x1c,0xdf,0x2e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 2edf1c1f <unknown>
+
+famin v0.4h, v0.4h, v0.4h
+// CHECK-INST: famin v0.4h, v0.4h, v0.4h
+// CHECK-ENCODING: [0x00,0x1c,0xc0,0x2e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 2ec01c00 <unknown>
+
+famin v31.8h, v31.8h, v31.8h
+// CHECK-INST: famin v31.8h, v31.8h, v31.8h
+// CHECK-ENCODING: [0xff,0x1f,0xdf,0x6e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 6edf1fff <unknown>
+
+famin v31.8h, v31.8h, v0.8h
+// CHECK-INST: famin v31.8h, v31.8h, v0.8h
+// CHECK-ENCODING: [0xff,0x1f,0xc0,0x6e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 6ec01fff <unknown>
+
+famin v0.8h, v0.8h, v0.8h
+// CHECK-INST: famin v0.8h, v0.8h, v0.8h
+// CHECK-ENCODING: [0x00,0x1c,0xc0,0x6e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 6ec01c00 <unknown>
+
+famin v31.2s, v31.2s, v31.2s
+// CHECK-INST: famin v31.2s, v31.2s, v31.2s
+// CHECK-ENCODING: [0xff,0xdf,0xbf,0x2e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 2ebfdfff <unknown>
+
+famin v31.2s, v0.2s, v0.2s
+// CHECK-INST: famin v31.2s, v0.2s, v0.2s
+// CHECK-ENCODING: [0x1f,0xdc,0xa0,0x2e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 2ea0dc1f <unknown>
+
+famin v0.2s, v0.2s, v0.2s
+// CHECK-INST: famin v0.2s, v0.2s, v0.2s
+// CHECK-ENCODING: [0x00,0xdc,0xa0,0x2e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 2ea0dc00 <unknown>
+
+famin v31.4s, v31.4s, v31.4s
+// CHECK-INST: famin v31.4s, v31.4s, v31.4s
+// CHECK-ENCODING: [0xff,0xdf,0xbf,0x6e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 6ebfdfff <unknown>
+
+famin v0.4s, v31.4s, v31.4s
+// CHECK-INST: famin v0.4s, v31.4s, v31.4s
+// CHECK-ENCODING: [0xe0,0xdf,0xbf,0x6e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 6ebfdfe0 <unknown>
+
+famin v0.4s, v0.4s, v0.4s
+// CHECK-INST: famin v0.4s, v0.4s, v0.4s
+// CHECK-ENCODING: [0x00,0xdc,0xa0,0x6e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 6ea0dc00 <unknown>
+
+famin v31.2d, v31.2d, v31.2d
+// CHECK-INST: famin v31.2d, v31.2d, v31.2d
+// CHECK-ENCODING: [0xff,0xdf,0xff,0x6e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 6effdfff <unknown>
+
+famin v0.2d, v0.2d, v31.2d
+// CHECK-INST: famin v0.2d, v0.2d, v31.2d
+// CHECK-ENCODING: [0x00,0xdc,0xff,0x6e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 6effdc00 <unknown>
+
+famin v0.2d, v0.2d, v0.2d
+// CHECK-INST: famin v0.2d, v0.2d, v0.2d
+// CHECK-ENCODING: [0x00,0xdc,0xe0,0x6e]
+// CHECK-ERROR: instruction requires: faminmax
+// CHECK-UNKNOWN: 6ee0dc00 <unknown>
+
diff --git a/llvm/test/MC/AArch64/FP8_SME2/faminmax-diagnoctics.s b/llvm/test/MC/AArch64/FP8_SME2/faminmax-diagnoctics.s
new file mode 100644
index 000000000000000..d6de69ec0ba08cf
--- /dev/null
+++ b/llvm/test/MC/AArch64/FP8_SME2/faminmax-diagnoctics.s
@@ -0,0 +1,62 @@
+// RUN: not llvm-mc -triple=aarch64 -show-encoding -mattr=+sme2,+faminmax 2>&1 < %s| FileCheck %s
+
+// --------------------------------------------------------------------------//
+// Incorrect operand
+
+famax {z0.h-z1.h}, {z0.d-z1.d}, {z0.s-z1.s}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// CHECK-NEXT: famax {z0.h-z1.h}, {z0.d-z1.d}, {z0.s-z1.s}
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famax {z28.s-z31.s}, {z28.h-z31.h}, {z28.d-z31.d}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// CHECK-NEXT: famax {z28.s-z31.s}, {z28.h-z31.h}, {z28.d-z31.d
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famin {z0.h-z1.h}, {z0.s-z1.s}, {z0.s-z1.s}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid operand for instruction
+// CHECK-NEXT: famin {z0.h-z1.h}, {z0.s-z1.s}, {z0.s-z1.s}
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+// --------------------------------------------------------------------------//
+// Incorrect range of vectors
+
+famax {z1.d-z0.d}, {z0.d-z1.d}, {z0.d-z1.d}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: invalid number of vectors
+// CHECK-NEXT: famax {z1.d-z0.d}, {z0.d-z1.d}, {z0.d-z1.d}
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famax {z0.h-z3.h}, {z1.h-z4.h}, {z0.h-z3.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 4 consecutive SVE vectors, where the first vector is a multiple of 4 and with matching element types
+// CHECK-NEXT: famax {z0.h-z3.h}, {z1.h-z4.h}, {z0.h-z3.h}
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famax {z0.h-z3.h}, {z0.h-z3.h}, {z2.h-z5.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 4 consecutive SVE vectors, where the first vector is a multiple of 4 and with matching element types
+// CHECK-NEXT: famax {z0.h-z3.h}, {z0.h-z3.h}, {z2.h-z5.h}
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famax {z3.h-z6.h}, {z0.h-z3.h}, {z0.h-z3.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 4 consecutive SVE vectors, where the first vector is a multiple of 4 and with matching element types
+// CHECK-NEXT: famax {z3.h-z6.h}, {z0.h-z3.h}, {z0.h-z3.h}
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famin {z30.h-z31.h}, {z31.h-z0.h}, {z0.h-z1.h}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 2 consecutive SVE vectors, where the first vector is a multiple of 2 and with matching element types
+// CHECK-NEXT: famin {z30.h-z31.h}, {z31.h-z0.h}, {z0.h-z1.h}
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famin {z29.d-z0.d}, {z0.d-z3.d}, {z0.d-z3.d}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 4 consecutive SVE vectors, where the first vector is a multiple of 4 and with matching element types
+// CHECK-NEXT: famin {z29.d-z0.d}, {z0.d-z3.d}, {z0.d-z3.d}
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+}}:
+
+famin {z0.d-z3.d}, {z30.d-z1.d}, {z0.d-z3.d}
+// CHECK: [[@LINE-1]]:{{[0-9]+}}: error: Invalid vector list, expected list with 4 consecutive SVE vectors, where the first vector is a multiple of 4 and with matching element types
+// CHECK-NEXT: famin {z0.d-z3.d}, {z30.d-z1.d}, {z0.d-z3.d}
+// CHECK-NOT: [[@LINE-1]]:{{[0-9]+...
[truncated]
``````````
</details>
https://github.com/llvm/llvm-project/pull/70115
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