[llvm] [X86][AVX10.2] Support AVX10.2-COMEF new instructions. (PR #108063)

via llvm-commits llvm-commits at lists.llvm.org
Tue Sep 10 10:47:23 PDT 2024


https://github.com/mahesh-attarde created https://github.com/llvm/llvm-project/pull/108063

Ref.: https://cdrdv2.intel.com/v1/dl/getContent/828965

>From 1b84bfa472900233ce96f66334ac5283e2910ea2 Mon Sep 17 00:00:00 2001
From: mattarde <mattarde at intel.com>
Date: Tue, 10 Sep 2024 10:40:49 -0700
Subject: [PATCH] support new instr

---
 llvm/lib/Target/X86/X86ISelLowering.cpp       |  87 +++++--
 llvm/lib/Target/X86/X86ISelLowering.h         |   4 +
 llvm/lib/Target/X86/X86InstrAVX10.td          |  42 ++++
 llvm/lib/Target/X86/X86InstrFragmentsSIMD.td  |   3 +-
 llvm/test/CodeGen/X86/comi-flags.ll           | 237 ++++++++++++------
 .../MC/Disassembler/X86/avx512-com-ef-32.txt  | 174 +++++++++++++
 .../MC/Disassembler/X86/avx512-com-ef-64.txt  | 171 +++++++++++++
 llvm/test/MC/X86/avx512-com-ef-32-att.s       | 170 +++++++++++++
 llvm/test/MC/X86/avx512-com-ef-32-intel.s     | 170 +++++++++++++
 llvm/test/MC/X86/avx512-com-ef-64-att.s       | 170 +++++++++++++
 llvm/test/MC/X86/avx512-com-ef-64-intel.s     | 170 +++++++++++++
 llvm/test/TableGen/x86-fold-tables.inc        |   6 +
 12 files changed, 1295 insertions(+), 109 deletions(-)
 create mode 100644 llvm/test/MC/Disassembler/X86/avx512-com-ef-32.txt
 create mode 100644 llvm/test/MC/Disassembler/X86/avx512-com-ef-64.txt
 create mode 100644 llvm/test/MC/X86/avx512-com-ef-32-att.s
 create mode 100644 llvm/test/MC/X86/avx512-com-ef-32-intel.s
 create mode 100644 llvm/test/MC/X86/avx512-com-ef-64-att.s
 create mode 100644 llvm/test/MC/X86/avx512-com-ef-64-intel.s

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index a1d466eee691c9..22d5e6a20c9d79 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -26060,32 +26060,67 @@ SDValue X86TargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
       if (CC == ISD::SETLT || CC == ISD::SETLE)
         std::swap(LHS, RHS);
 
-      SDValue Comi = DAG.getNode(IntrData->Opc0, dl, MVT::i32, LHS, RHS);
+      // For AVX10.2, Support EQ and NE
+      bool HasAVX10_2_COMX =
+          Subtarget.hasAVX10_2() && (CC == ISD::SETEQ || CC == ISD::SETNE);
+
+      // AVX10.2 COMPARE supports only v2f64, v4f32 or v8f16
+      auto SVT = LHS.getSimpleValueType();
+      bool HasAVX10_2_COMX_Ty =
+          (SVT == MVT::v2f64) || (SVT == MVT::v4f32) || (SVT == MVT::v8f16);
+
+      auto ComiOpCode = IntrData->Opc0;
+      auto isUnordered = (ComiOpCode == X86ISD::UCOMI);
+
+      if (HasAVX10_2_COMX && HasAVX10_2_COMX_Ty)
+        ComiOpCode = isUnordered ? X86ISD::UCOMX : X86ISD::COMX;
+
+      SDValue Comi = DAG.getNode(ComiOpCode, dl, MVT::i32, LHS, RHS);
+
       SDValue SetCC;
-      switch (CC) {
-      case ISD::SETEQ: { // (ZF = 0 and PF = 0)
-        SetCC = getSETCC(X86::COND_E, Comi, dl, DAG);
-        SDValue SetNP = getSETCC(X86::COND_NP, Comi, dl, DAG);
-        SetCC = DAG.getNode(ISD::AND, dl, MVT::i8, SetCC, SetNP);
-        break;
-      }
-      case ISD::SETNE: { // (ZF = 1 or PF = 1)
-        SetCC = getSETCC(X86::COND_NE, Comi, dl, DAG);
-        SDValue SetP = getSETCC(X86::COND_P, Comi, dl, DAG);
-        SetCC = DAG.getNode(ISD::OR, dl, MVT::i8, SetCC, SetP);
-        break;
-      }
-      case ISD::SETGT: // (CF = 0 and ZF = 0)
-      case ISD::SETLT: { // Condition opposite to GT. Operands swapped above.
-        SetCC = getSETCC(X86::COND_A, Comi, dl, DAG);
-        break;
-      }
-      case ISD::SETGE: // CF = 0
-      case ISD::SETLE: // Condition opposite to GE. Operands swapped above.
-        SetCC = getSETCC(X86::COND_AE, Comi, dl, DAG);
-        break;
-      default:
-        llvm_unreachable("Unexpected illegal condition!");
+      if (HasAVX10_2_COMX & HasAVX10_2_COMX_Ty) {
+        switch (CC) {
+        case ISD::SETEQ: { // (ZF)
+          SetCC = getSETCC(X86::COND_E, Comi, dl, DAG);
+          break;
+        }
+        case ISD::SETNE: { // (!ZF)
+          SetCC = getSETCC(X86::COND_NE, Comi, dl, DAG);
+          break;
+        }
+        case ISD::SETGT:
+        case ISD::SETLT:
+        case ISD::SETGE:
+        case ISD::SETLE:
+        default:
+          llvm_unreachable("Un-implemented condition!");
+        }
+      } else {
+        switch (CC) {
+        case ISD::SETEQ: { // (ZF = 0 and PF = 0)
+          SetCC = getSETCC(X86::COND_E, Comi, dl, DAG);
+          SDValue SetNP = getSETCC(X86::COND_NP, Comi, dl, DAG);
+          SetCC = DAG.getNode(ISD::AND, dl, MVT::i8, SetCC, SetNP);
+          break;
+        }
+        case ISD::SETNE: { // (ZF = 1 or PF = 1)
+          SetCC = getSETCC(X86::COND_NE, Comi, dl, DAG);
+          SDValue SetP = getSETCC(X86::COND_P, Comi, dl, DAG);
+          SetCC = DAG.getNode(ISD::OR, dl, MVT::i8, SetCC, SetP);
+          break;
+        }
+        case ISD::SETGT:   // (CF = 0 and ZF = 0)
+        case ISD::SETLT: { // Condition opposite to GT. Operands swapped above.
+          SetCC = getSETCC(X86::COND_A, Comi, dl, DAG);
+          break;
+        }
+        case ISD::SETGE: // CF = 0
+        case ISD::SETLE: // Condition opposite to GE. Operands swapped above.
+          SetCC = getSETCC(X86::COND_AE, Comi, dl, DAG);
+          break;
+        default:
+          llvm_unreachable("Unexpected illegal condition!");
+        }
       }
       return DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, SetCC);
     }
@@ -33845,6 +33880,8 @@ const char *X86TargetLowering::getTargetNodeName(unsigned Opcode) const {
   NODE_NAME_CASE(STRICT_FCMPS)
   NODE_NAME_CASE(COMI)
   NODE_NAME_CASE(UCOMI)
+  NODE_NAME_CASE(COMX)
+  NODE_NAME_CASE(UCOMX)
   NODE_NAME_CASE(CMPM)
   NODE_NAME_CASE(CMPMM)
   NODE_NAME_CASE(STRICT_CMPM)
diff --git a/llvm/lib/Target/X86/X86ISelLowering.h b/llvm/lib/Target/X86/X86ISelLowering.h
index 93d2b3e65742b2..cf9125dd9c3ccf 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.h
+++ b/llvm/lib/Target/X86/X86ISelLowering.h
@@ -87,6 +87,10 @@ namespace llvm {
     COMI,
     UCOMI,
 
+    // X86 compare with Intrinsics similar to COMI
+    COMX,
+    UCOMX,
+
     /// X86 bit-test instructions.
     BT,
 
diff --git a/llvm/lib/Target/X86/X86InstrAVX10.td b/llvm/lib/Target/X86/X86InstrAVX10.td
index b0eb210b687b19..b2c93455c95de2 100644
--- a/llvm/lib/Target/X86/X86InstrAVX10.td
+++ b/llvm/lib/Target/X86/X86InstrAVX10.td
@@ -1225,3 +1225,45 @@ defm VFNMADD132NEPBF16 : avx10_fma3p_132_bf16<0x9C, "vfnmadd132nepbf16", X86any_
 defm VFNMSUB132NEPBF16 : avx10_fma3p_132_bf16<0x9E, "vfnmsub132nepbf16", X86any_Fnmsub,
                                               X86Fnmsub, SchedWriteFMA>;
 }
+
+//-------------------------------------------------
+// AVX10  COMEF instructions
+//-------------------------------------------------
+multiclass avx10_com_ef_int<bits<8> Opc, X86VectorVTInfo _, SDNode OpNode,
+                             string OpcodeStr,
+                             Domain d,
+                             X86FoldableSchedWrite sched = WriteFComX> {
+  let ExeDomain = d in {
+    def rr_Int : AVX512<Opc, MRMSrcReg, (outs), (ins _.RC:$src1, _.RC:$src2),
+                        !strconcat(OpcodeStr, "\t{$src2, $src1|$src1, $src2}"),
+                        [(set EFLAGS, (OpNode (_.VT _.RC:$src1), _.RC:$src2))]>,
+                        EVEX, EVEX_V128, Sched<[sched]>, SIMD_EXC;
+    let mayLoad = 1 in {
+        def rm_Int : AVX512<Opc, MRMSrcMem, (outs), (ins _.RC:$src1, _.ScalarMemOp:$src2),
+                            !strconcat(OpcodeStr, "\t{$src2, $src1|$src1, $src2}"),
+                            [(set EFLAGS, (OpNode (_.VT _.RC:$src1), (_.LdFrag addr:$src2)))]>,
+                            EVEX, EVEX_V128, Sched<[sched]>, SIMD_EXC;
+    }
+  }
+}
+
+let Defs = [EFLAGS], Predicates = [HasAVX10_2] in {
+  defm VCOMXSDZ   :  avx10_com_ef_int<0x2f, v2f64x_info, X86comi512,
+                                      "vcomxsd", SSEPackedDouble>,
+                                      TB, XS, VEX_LIG, REX_W, EVEX_CD8<64, CD8VT1>;
+  defm VCOMXSHZ   :  avx10_com_ef_int<0x2f, v8f16x_info, X86comi512,
+                                      "vcomxsh", SSEPackedSingle>,
+                                      T_MAP5, XD, EVEX_CD8<16, CD8VT1>;
+  defm VCOMXSSZ   :  avx10_com_ef_int<0x2f, v4f32x_info, X86comi512,
+                                      "vcomxss", SSEPackedSingle>,
+                                      TB, XD, VEX_LIG, EVEX_CD8<32, CD8VT1>;
+  defm VUCOMXSDZ  :  avx10_com_ef_int<0x2e, v2f64x_info, X86ucomi512,
+                                      "vucomxsd", SSEPackedDouble>,
+                                      TB, XS, VEX_LIG, REX_W, EVEX_CD8<64, CD8VT1>;
+  defm VUCOMXSHZ  :  avx10_com_ef_int<0x2e, v8f16x_info, X86ucomi512,
+                                      "vucomxsh", SSEPackedSingle>,
+                                      T_MAP5, XD, EVEX_CD8<16, CD8VT1>;
+  defm VUCOMXSSZ  :  avx10_com_ef_int<0x2e, v4f32x_info, X86ucomi512,
+                                      "vucomxss", SSEPackedSingle>,
+                                      TB, XD, VEX_LIG, EVEX_CD8<32, CD8VT1>;
+}
\ No newline at end of file
diff --git a/llvm/lib/Target/X86/X86InstrFragmentsSIMD.td b/llvm/lib/Target/X86/X86InstrFragmentsSIMD.td
index 59bfd2bcbabc26..fb6920042734a1 100644
--- a/llvm/lib/Target/X86/X86InstrFragmentsSIMD.td
+++ b/llvm/lib/Target/X86/X86InstrFragmentsSIMD.td
@@ -61,7 +61,8 @@ def X86hadd    : SDNode<"X86ISD::HADD",      SDTIntBinOp>;
 def X86hsub    : SDNode<"X86ISD::HSUB",      SDTIntBinOp>;
 def X86comi    : SDNode<"X86ISD::COMI",      SDTX86FCmp>;
 def X86ucomi   : SDNode<"X86ISD::UCOMI",     SDTX86FCmp>;
-
+def X86comi512       : SDNode<"X86ISD::COMX",      SDTX86FCmp>;
+def X86ucomi512      : SDNode<"X86ISD::UCOMX",     SDTX86FCmp>;
 def SDTX86Cmps : SDTypeProfile<1, 3, [SDTCisFP<0>, SDTCisSameAs<0, 1>,
                                       SDTCisSameAs<1, 2>, SDTCisVT<3, i8>]>;
 def X86cmps    : SDNode<"X86ISD::FSETCC",    SDTX86Cmps>;
diff --git a/llvm/test/CodeGen/X86/comi-flags.ll b/llvm/test/CodeGen/X86/comi-flags.ll
index 8b7a089f0ce872..6f520aa57dcd09 100644
--- a/llvm/test/CodeGen/X86/comi-flags.ll
+++ b/llvm/test/CodeGen/X86/comi-flags.ll
@@ -1,6 +1,7 @@
 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
 ; RUN: llc < %s -mtriple=x86_64-- -mattr=+sse2 | FileCheck %s --check-prefix=SSE
-; RUN: llc < %s -mtriple=x86_64-- -mattr=+avx  | FileCheck %s --check-prefix=AVX
+; RUN: llc < %s -mtriple=x86_64-- -mattr=+avx  | FileCheck %s --check-prefixes=AVX,NO-AVX10_2
+; RUN: llc < %s -mtriple=x86_64-- -mattr=+avx10.2-256 | FileCheck %s --check-prefixes=AVX,AVX10_2
 
 ;
 ; SSE
@@ -17,15 +18,22 @@ define i32 @test_x86_sse_comieq_ss(<4 x float> %a0, <4 x float> %a1, i32 %a2, i3
 ; SSE-NEXT:    cmovnel %esi, %eax
 ; SSE-NEXT:    retq
 ;
-; AVX-LABEL: test_x86_sse_comieq_ss:
-; AVX:       # %bb.0:
-; AVX-NEXT:    movl %edi, %eax
-; AVX-NEXT:    vcomiss %xmm1, %xmm0
-; AVX-NEXT:    setnp %cl
-; AVX-NEXT:    sete %dl
-; AVX-NEXT:    testb %cl, %dl
-; AVX-NEXT:    cmovnel %esi, %eax
-; AVX-NEXT:    retq
+; NO-AVX10_2-LABEL: test_x86_sse_comieq_ss:
+; NO-AVX10_2:       # %bb.0:
+; NO-AVX10_2-NEXT:    movl %edi, %eax
+; NO-AVX10_2-NEXT:    vcomiss %xmm1, %xmm0
+; NO-AVX10_2-NEXT:    setnp %cl
+; NO-AVX10_2-NEXT:    sete %dl
+; NO-AVX10_2-NEXT:    testb %cl, %dl
+; NO-AVX10_2-NEXT:    cmovnel %esi, %eax
+; NO-AVX10_2-NEXT:    retq
+;
+; AVX10_2-LABEL: test_x86_sse_comieq_ss:
+; AVX10_2:       # %bb.0:
+; AVX10_2-NEXT:    movl %edi, %eax
+; AVX10_2-NEXT:    vcomxss %xmm1, %xmm0
+; AVX10_2-NEXT:    cmovel %esi, %eax
+; AVX10_2-NEXT:    retq
   %call = call i32 @llvm.x86.sse.comieq.ss(<4 x float> %a0, <4 x float> %a1)
   %cmp = icmp eq i32 %call, 0
   %res = select i1 %cmp, i32 %a2, i32 %a3
@@ -126,13 +134,20 @@ define i32 @test_x86_sse_comineq_ss(<4 x float> %a0, <4 x float> %a1, i32 %a2, i
 ; SSE-NEXT:    cmovpl %edi, %eax
 ; SSE-NEXT:    retq
 ;
-; AVX-LABEL: test_x86_sse_comineq_ss:
-; AVX:       # %bb.0:
-; AVX-NEXT:    movl %esi, %eax
-; AVX-NEXT:    vcomiss %xmm1, %xmm0
-; AVX-NEXT:    cmovnel %edi, %eax
-; AVX-NEXT:    cmovpl %edi, %eax
-; AVX-NEXT:    retq
+; NO-AVX10_2-LABEL: test_x86_sse_comineq_ss:
+; NO-AVX10_2:       # %bb.0:
+; NO-AVX10_2-NEXT:    movl %esi, %eax
+; NO-AVX10_2-NEXT:    vcomiss %xmm1, %xmm0
+; NO-AVX10_2-NEXT:    cmovnel %edi, %eax
+; NO-AVX10_2-NEXT:    cmovpl %edi, %eax
+; NO-AVX10_2-NEXT:    retq
+;
+; AVX10_2-LABEL: test_x86_sse_comineq_ss:
+; AVX10_2:       # %bb.0:
+; AVX10_2-NEXT:    movl %edi, %eax
+; AVX10_2-NEXT:    vcomxss %xmm1, %xmm0
+; AVX10_2-NEXT:    cmovel %esi, %eax
+; AVX10_2-NEXT:    retq
   %call = call i32 @llvm.x86.sse.comineq.ss(<4 x float> %a0, <4 x float> %a1)
   %cmp = icmp ne i32 %call, 0
   %res = select i1 %cmp, i32 %a2, i32 %a3
@@ -151,15 +166,22 @@ define i32 @test_x86_sse_ucomieq_ss(<4 x float> %a0, <4 x float> %a1, i32 %a2, i
 ; SSE-NEXT:    cmovnel %esi, %eax
 ; SSE-NEXT:    retq
 ;
-; AVX-LABEL: test_x86_sse_ucomieq_ss:
-; AVX:       # %bb.0:
-; AVX-NEXT:    movl %edi, %eax
-; AVX-NEXT:    vucomiss %xmm1, %xmm0
-; AVX-NEXT:    setnp %cl
-; AVX-NEXT:    sete %dl
-; AVX-NEXT:    testb %cl, %dl
-; AVX-NEXT:    cmovnel %esi, %eax
-; AVX-NEXT:    retq
+; NO-AVX10_2-LABEL: test_x86_sse_ucomieq_ss:
+; NO-AVX10_2:       # %bb.0:
+; NO-AVX10_2-NEXT:    movl %edi, %eax
+; NO-AVX10_2-NEXT:    vucomiss %xmm1, %xmm0
+; NO-AVX10_2-NEXT:    setnp %cl
+; NO-AVX10_2-NEXT:    sete %dl
+; NO-AVX10_2-NEXT:    testb %cl, %dl
+; NO-AVX10_2-NEXT:    cmovnel %esi, %eax
+; NO-AVX10_2-NEXT:    retq
+;
+; AVX10_2-LABEL: test_x86_sse_ucomieq_ss:
+; AVX10_2:       # %bb.0:
+; AVX10_2-NEXT:    movl %edi, %eax
+; AVX10_2-NEXT:    vucomxss %xmm1, %xmm0
+; AVX10_2-NEXT:    cmovel %esi, %eax
+; AVX10_2-NEXT:    retq
   %call = call i32 @llvm.x86.sse.ucomieq.ss(<4 x float> %a0, <4 x float> %a1)
   %cmp = icmp eq i32 %call, 0
   %res = select i1 %cmp, i32 %a2, i32 %a3
@@ -260,13 +282,20 @@ define i32 @test_x86_sse_ucomineq_ss(<4 x float> %a0, <4 x float> %a1, i32 %a2,
 ; SSE-NEXT:    cmovpl %edi, %eax
 ; SSE-NEXT:    retq
 ;
-; AVX-LABEL: test_x86_sse_ucomineq_ss:
-; AVX:       # %bb.0:
-; AVX-NEXT:    movl %esi, %eax
-; AVX-NEXT:    vucomiss %xmm1, %xmm0
-; AVX-NEXT:    cmovnel %edi, %eax
-; AVX-NEXT:    cmovpl %edi, %eax
-; AVX-NEXT:    retq
+; NO-AVX10_2-LABEL: test_x86_sse_ucomineq_ss:
+; NO-AVX10_2:       # %bb.0:
+; NO-AVX10_2-NEXT:    movl %esi, %eax
+; NO-AVX10_2-NEXT:    vucomiss %xmm1, %xmm0
+; NO-AVX10_2-NEXT:    cmovnel %edi, %eax
+; NO-AVX10_2-NEXT:    cmovpl %edi, %eax
+; NO-AVX10_2-NEXT:    retq
+;
+; AVX10_2-LABEL: test_x86_sse_ucomineq_ss:
+; AVX10_2:       # %bb.0:
+; AVX10_2-NEXT:    movl %edi, %eax
+; AVX10_2-NEXT:    vucomxss %xmm1, %xmm0
+; AVX10_2-NEXT:    cmovel %esi, %eax
+; AVX10_2-NEXT:    retq
   %call = call i32 @llvm.x86.sse.ucomineq.ss(<4 x float> %a0, <4 x float> %a1)
   %cmp = icmp ne i32 %call, 0
   %res = select i1 %cmp, i32 %a2, i32 %a3
@@ -289,15 +318,22 @@ define i32 @test_x86_sse2_comieq_sd(<2 x double> %a0, <2 x double> %a1, i32 %a2,
 ; SSE-NEXT:    cmovnel %esi, %eax
 ; SSE-NEXT:    retq
 ;
-; AVX-LABEL: test_x86_sse2_comieq_sd:
-; AVX:       # %bb.0:
-; AVX-NEXT:    movl %edi, %eax
-; AVX-NEXT:    vcomisd %xmm1, %xmm0
-; AVX-NEXT:    setnp %cl
-; AVX-NEXT:    sete %dl
-; AVX-NEXT:    testb %cl, %dl
-; AVX-NEXT:    cmovnel %esi, %eax
-; AVX-NEXT:    retq
+; NO-AVX10_2-LABEL: test_x86_sse2_comieq_sd:
+; NO-AVX10_2:       # %bb.0:
+; NO-AVX10_2-NEXT:    movl %edi, %eax
+; NO-AVX10_2-NEXT:    vcomisd %xmm1, %xmm0
+; NO-AVX10_2-NEXT:    setnp %cl
+; NO-AVX10_2-NEXT:    sete %dl
+; NO-AVX10_2-NEXT:    testb %cl, %dl
+; NO-AVX10_2-NEXT:    cmovnel %esi, %eax
+; NO-AVX10_2-NEXT:    retq
+;
+; AVX10_2-LABEL: test_x86_sse2_comieq_sd:
+; AVX10_2:       # %bb.0:
+; AVX10_2-NEXT:    movl %edi, %eax
+; AVX10_2-NEXT:    vcomxsd %xmm1, %xmm0
+; AVX10_2-NEXT:    cmovel %esi, %eax
+; AVX10_2-NEXT:    retq
   %call = call i32 @llvm.x86.sse2.comieq.sd(<2 x double> %a0, <2 x double> %a1) ; <i32> [#uses=1]
   %cmp = icmp eq i32 %call, 0
   %res = select i1 %cmp, i32 %a2, i32 %a3
@@ -398,13 +434,20 @@ define i32 @test_x86_sse2_comineq_sd(<2 x double> %a0, <2 x double> %a1, i32 %a2
 ; SSE-NEXT:    cmovpl %edi, %eax
 ; SSE-NEXT:    retq
 ;
-; AVX-LABEL: test_x86_sse2_comineq_sd:
-; AVX:       # %bb.0:
-; AVX-NEXT:    movl %esi, %eax
-; AVX-NEXT:    vcomisd %xmm1, %xmm0
-; AVX-NEXT:    cmovnel %edi, %eax
-; AVX-NEXT:    cmovpl %edi, %eax
-; AVX-NEXT:    retq
+; NO-AVX10_2-LABEL: test_x86_sse2_comineq_sd:
+; NO-AVX10_2:       # %bb.0:
+; NO-AVX10_2-NEXT:    movl %esi, %eax
+; NO-AVX10_2-NEXT:    vcomisd %xmm1, %xmm0
+; NO-AVX10_2-NEXT:    cmovnel %edi, %eax
+; NO-AVX10_2-NEXT:    cmovpl %edi, %eax
+; NO-AVX10_2-NEXT:    retq
+;
+; AVX10_2-LABEL: test_x86_sse2_comineq_sd:
+; AVX10_2:       # %bb.0:
+; AVX10_2-NEXT:    movl %edi, %eax
+; AVX10_2-NEXT:    vcomxsd %xmm1, %xmm0
+; AVX10_2-NEXT:    cmovel %esi, %eax
+; AVX10_2-NEXT:    retq
   %call = call i32 @llvm.x86.sse2.comineq.sd(<2 x double> %a0, <2 x double> %a1) ; <i32> [#uses=1]
   %cmp = icmp ne i32 %call, 0
   %res = select i1 %cmp, i32 %a2, i32 %a3
@@ -423,15 +466,22 @@ define i32 @test_x86_sse2_ucomieq_sd(<2 x double> %a0, <2 x double> %a1, i32 %a2
 ; SSE-NEXT:    cmovnel %esi, %eax
 ; SSE-NEXT:    retq
 ;
-; AVX-LABEL: test_x86_sse2_ucomieq_sd:
-; AVX:       # %bb.0:
-; AVX-NEXT:    movl %edi, %eax
-; AVX-NEXT:    vucomisd %xmm1, %xmm0
-; AVX-NEXT:    setnp %cl
-; AVX-NEXT:    sete %dl
-; AVX-NEXT:    testb %cl, %dl
-; AVX-NEXT:    cmovnel %esi, %eax
-; AVX-NEXT:    retq
+; NO-AVX10_2-LABEL: test_x86_sse2_ucomieq_sd:
+; NO-AVX10_2:       # %bb.0:
+; NO-AVX10_2-NEXT:    movl %edi, %eax
+; NO-AVX10_2-NEXT:    vucomisd %xmm1, %xmm0
+; NO-AVX10_2-NEXT:    setnp %cl
+; NO-AVX10_2-NEXT:    sete %dl
+; NO-AVX10_2-NEXT:    testb %cl, %dl
+; NO-AVX10_2-NEXT:    cmovnel %esi, %eax
+; NO-AVX10_2-NEXT:    retq
+;
+; AVX10_2-LABEL: test_x86_sse2_ucomieq_sd:
+; AVX10_2:       # %bb.0:
+; AVX10_2-NEXT:    movl %edi, %eax
+; AVX10_2-NEXT:    vucomxsd %xmm1, %xmm0
+; AVX10_2-NEXT:    cmovel %esi, %eax
+; AVX10_2-NEXT:    retq
   %call = call i32 @llvm.x86.sse2.ucomieq.sd(<2 x double> %a0, <2 x double> %a1) ; <i32> [#uses=1]
   %cmp = icmp eq i32 %call, 0
   %res = select i1 %cmp, i32 %a2, i32 %a3
@@ -532,13 +582,20 @@ define i32 @test_x86_sse2_ucomineq_sd(<2 x double> %a0, <2 x double> %a1, i32 %a
 ; SSE-NEXT:    cmovpl %edi, %eax
 ; SSE-NEXT:    retq
 ;
-; AVX-LABEL: test_x86_sse2_ucomineq_sd:
-; AVX:       # %bb.0:
-; AVX-NEXT:    movl %esi, %eax
-; AVX-NEXT:    vucomisd %xmm1, %xmm0
-; AVX-NEXT:    cmovnel %edi, %eax
-; AVX-NEXT:    cmovpl %edi, %eax
-; AVX-NEXT:    retq
+; NO-AVX10_2-LABEL: test_x86_sse2_ucomineq_sd:
+; NO-AVX10_2:       # %bb.0:
+; NO-AVX10_2-NEXT:    movl %esi, %eax
+; NO-AVX10_2-NEXT:    vucomisd %xmm1, %xmm0
+; NO-AVX10_2-NEXT:    cmovnel %edi, %eax
+; NO-AVX10_2-NEXT:    cmovpl %edi, %eax
+; NO-AVX10_2-NEXT:    retq
+;
+; AVX10_2-LABEL: test_x86_sse2_ucomineq_sd:
+; AVX10_2:       # %bb.0:
+; AVX10_2-NEXT:    movl %edi, %eax
+; AVX10_2-NEXT:    vucomxsd %xmm1, %xmm0
+; AVX10_2-NEXT:    cmovel %esi, %eax
+; AVX10_2-NEXT:    retq
   %call = call i32 @llvm.x86.sse2.ucomineq.sd(<2 x double> %a0, <2 x double> %a1) ; <i32> [#uses=1]
   %cmp = icmp ne i32 %call, 0
   %res = select i1 %cmp, i32 %a2, i32 %a3
@@ -557,15 +614,22 @@ define void @PR38960_eq(<4 x float> %A, <4 x float> %B) {
 ; SSE-NEXT:  # %bb.1: # %if.end
 ; SSE-NEXT:    retq
 ;
-; AVX-LABEL: PR38960_eq:
-; AVX:       # %bb.0: # %entry
-; AVX-NEXT:    vcomiss %xmm1, %xmm0
-; AVX-NEXT:    setnp %al
-; AVX-NEXT:    sete %cl
-; AVX-NEXT:    testb %al, %cl
-; AVX-NEXT:    jne foo at PLT # TAILCALL
-; AVX-NEXT:  # %bb.1: # %if.end
-; AVX-NEXT:    retq
+; NO-AVX10_2-LABEL: PR38960_eq:
+; NO-AVX10_2:       # %bb.0: # %entry
+; NO-AVX10_2-NEXT:    vcomiss %xmm1, %xmm0
+; NO-AVX10_2-NEXT:    setnp %al
+; NO-AVX10_2-NEXT:    sete %cl
+; NO-AVX10_2-NEXT:    testb %al, %cl
+; NO-AVX10_2-NEXT:    jne foo at PLT # TAILCALL
+; NO-AVX10_2-NEXT:  # %bb.1: # %if.end
+; NO-AVX10_2-NEXT:    retq
+;
+; AVX10_2-LABEL: PR38960_eq:
+; AVX10_2:       # %bb.0: # %entry
+; AVX10_2-NEXT:    vcomxss %xmm1, %xmm0
+; AVX10_2-NEXT:    je foo at PLT # TAILCALL
+; AVX10_2-NEXT:  # %bb.1: # %if.end
+; AVX10_2-NEXT:    retq
 entry:
   %call = tail call i32 @llvm.x86.sse.comieq.ss(<4 x float> %A, <4 x float> %B) #3
   %cmp = icmp eq i32 %call, 0
@@ -590,15 +654,22 @@ define void @PR38960_neq(<4 x float> %A, <4 x float> %B) {
 ; SSE-NEXT:  # %bb.1: # %if.end
 ; SSE-NEXT:    retq
 ;
-; AVX-LABEL: PR38960_neq:
-; AVX:       # %bb.0: # %entry
-; AVX-NEXT:    vcomiss %xmm1, %xmm0
-; AVX-NEXT:    setp %al
-; AVX-NEXT:    setne %cl
-; AVX-NEXT:    orb %al, %cl
-; AVX-NEXT:    jne foo at PLT # TAILCALL
-; AVX-NEXT:  # %bb.1: # %if.end
-; AVX-NEXT:    retq
+; NO-AVX10_2-LABEL: PR38960_neq:
+; NO-AVX10_2:       # %bb.0: # %entry
+; NO-AVX10_2-NEXT:    vcomiss %xmm1, %xmm0
+; NO-AVX10_2-NEXT:    setp %al
+; NO-AVX10_2-NEXT:    setne %cl
+; NO-AVX10_2-NEXT:    orb %al, %cl
+; NO-AVX10_2-NEXT:    jne foo at PLT # TAILCALL
+; NO-AVX10_2-NEXT:  # %bb.1: # %if.end
+; NO-AVX10_2-NEXT:    retq
+;
+; AVX10_2-LABEL: PR38960_neq:
+; AVX10_2:       # %bb.0: # %entry
+; AVX10_2-NEXT:    vcomxss %xmm1, %xmm0
+; AVX10_2-NEXT:    jne foo at PLT # TAILCALL
+; AVX10_2-NEXT:  # %bb.1: # %if.end
+; AVX10_2-NEXT:    retq
 entry:
   %call = tail call i32 @llvm.x86.sse.comineq.ss(<4 x float> %A, <4 x float> %B) #3
   %cmp = icmp eq i32 %call, 0
diff --git a/llvm/test/MC/Disassembler/X86/avx512-com-ef-32.txt b/llvm/test/MC/Disassembler/X86/avx512-com-ef-32.txt
new file mode 100644
index 00000000000000..f762601c9f6221
--- /dev/null
+++ b/llvm/test/MC/Disassembler/X86/avx512-com-ef-32.txt
@@ -0,0 +1,174 @@
+# RUN: llvm-mc --disassemble %s -triple=i386 | FileCheck %s --check-prefixes=ATT
+# RUN: llvm-mc --disassemble %s -triple=i386 -x86-asm-syntax=intel --output-asm-variant=1 | FileCheck %s --check-prefixes=INTEL
+
+# ATT:   vcomxsd %xmm3, %xmm2
+# INTEL: vcomxsd xmm2, xmm3
+0x62,0xf1,0xfe,0x08,0x2f,0xd3
+
+# ATT:   vcomxsd  268435456(%esp,%esi,8), %xmm2
+# INTEL: vcomxsd xmm2, qword ptr [esp + 8*esi + 268435456]
+0x62,0xf1,0xfe,0x08,0x2f,0x94,0xf4,0x00,0x00,0x00,0x10
+
+# ATT:   vcomxsd  291(%edi,%eax,4), %xmm2
+# INTEL: vcomxsd xmm2, qword ptr [edi + 4*eax + 291]
+0x62,0xf1,0xfe,0x08,0x2f,0x94,0x87,0x23,0x01,0x00,0x00
+
+# ATT:   vcomxsd  (%eax), %xmm2
+# INTEL: vcomxsd xmm2, qword ptr [eax]
+0x62,0xf1,0xfe,0x08,0x2f,0x10
+
+# ATT:   vcomxsd  -256(,%ebp,2), %xmm2
+# INTEL: vcomxsd xmm2, qword ptr [2*ebp - 256]
+0x62,0xf1,0xfe,0x08,0x2f,0x14,0x6d,0x00,0xff,0xff,0xff
+
+# ATT:   vcomxsd  1016(%ecx), %xmm2
+# INTEL: vcomxsd xmm2, qword ptr [ecx + 1016]
+0x62,0xf1,0xfe,0x08,0x2f,0x51,0x7f
+
+# ATT:   vcomxsd  -1024(%edx), %xmm2
+# INTEL: vcomxsd xmm2, qword ptr [edx - 1024]
+0x62,0xf1,0xfe,0x08,0x2f,0x52,0x80
+
+# ATT:   vcomxsh %xmm3, %xmm2
+# INTEL: vcomxsh xmm2, xmm3
+0x62,0xf5,0x7f,0x08,0x2f,0xd3
+
+# ATT:   vcomxsh  268435456(%esp,%esi,8), %xmm2
+# INTEL: vcomxsh xmm2, word ptr [esp + 8*esi + 268435456]
+0x62,0xf5,0x7f,0x08,0x2f,0x94,0xf4,0x00,0x00,0x00,0x10
+
+# ATT:   vcomxsh  291(%edi,%eax,4), %xmm2
+# INTEL: vcomxsh xmm2, word ptr [edi + 4*eax + 291]
+0x62,0xf5,0x7f,0x08,0x2f,0x94,0x87,0x23,0x01,0x00,0x00
+
+# ATT:   vcomxsh  (%eax), %xmm2
+# INTEL: vcomxsh xmm2, word ptr [eax]
+0x62,0xf5,0x7f,0x08,0x2f,0x10
+
+# ATT:   vcomxsh  -64(,%ebp,2), %xmm2
+# INTEL: vcomxsh xmm2, word ptr [2*ebp - 64]
+0x62,0xf5,0x7f,0x08,0x2f,0x14,0x6d,0xc0,0xff,0xff,0xff
+
+# ATT:   vcomxsh  254(%ecx), %xmm2
+# INTEL: vcomxsh xmm2, word ptr [ecx + 254]
+0x62,0xf5,0x7f,0x08,0x2f,0x51,0x7f
+
+# ATT:   vcomxsh  -256(%edx), %xmm2
+# INTEL: vcomxsh xmm2, word ptr [edx - 256]
+0x62,0xf5,0x7f,0x08,0x2f,0x52,0x80
+
+# ATT:   vcomxss %xmm3, %xmm2
+# INTEL: vcomxss xmm2, xmm3
+0x62,0xf1,0x7f,0x08,0x2f,0xd3
+
+
+# ATT:   vcomxss  268435456(%esp,%esi,8), %xmm2
+# INTEL: vcomxss xmm2, dword ptr [esp + 8*esi + 268435456]
+0x62,0xf1,0x7f,0x08,0x2f,0x94,0xf4,0x00,0x00,0x00,0x10
+
+# ATT:   vcomxss  291(%edi,%eax,4), %xmm2
+# INTEL: vcomxss xmm2, dword ptr [edi + 4*eax + 291]
+0x62,0xf1,0x7f,0x08,0x2f,0x94,0x87,0x23,0x01,0x00,0x00
+
+# ATT:   vcomxss  (%eax), %xmm2
+# INTEL: vcomxss xmm2, dword ptr [eax]
+0x62,0xf1,0x7f,0x08,0x2f,0x10
+
+# ATT:   vcomxss  -128(,%ebp,2), %xmm2
+# INTEL: vcomxss xmm2, dword ptr [2*ebp - 128]
+0x62,0xf1,0x7f,0x08,0x2f,0x14,0x6d,0x80,0xff,0xff,0xff
+
+# ATT:   vcomxss  508(%ecx), %xmm2
+# INTEL: vcomxss xmm2, dword ptr [ecx + 508]
+0x62,0xf1,0x7f,0x08,0x2f,0x51,0x7f
+
+# ATT:   vcomxss  -512(%edx), %xmm2
+# INTEL: vcomxss xmm2, dword ptr [edx - 512]
+0x62,0xf1,0x7f,0x08,0x2f,0x52,0x80
+
+# ATT:   vucomxsd %xmm3, %xmm2
+# INTEL: vucomxsd xmm2, xmm3
+0x62,0xf1,0xfe,0x08,0x2e,0xd3
+
+
+# ATT:   vucomxsd  268435456(%esp,%esi,8), %xmm2
+# INTEL: vucomxsd xmm2, qword ptr [esp + 8*esi + 268435456]
+0x62,0xf1,0xfe,0x08,0x2e,0x94,0xf4,0x00,0x00,0x00,0x10
+
+# ATT:   vucomxsd  291(%edi,%eax,4), %xmm2
+# INTEL: vucomxsd xmm2, qword ptr [edi + 4*eax + 291]
+0x62,0xf1,0xfe,0x08,0x2e,0x94,0x87,0x23,0x01,0x00,0x00
+
+# ATT:   vucomxsd  (%eax), %xmm2
+# INTEL: vucomxsd xmm2, qword ptr [eax]
+0x62,0xf1,0xfe,0x08,0x2e,0x10
+
+# ATT:   vucomxsd  -256(,%ebp,2), %xmm2
+# INTEL: vucomxsd xmm2, qword ptr [2*ebp - 256]
+0x62,0xf1,0xfe,0x08,0x2e,0x14,0x6d,0x00,0xff,0xff,0xff
+
+# ATT:   vucomxsd  1016(%ecx), %xmm2
+# INTEL: vucomxsd xmm2, qword ptr [ecx + 1016]
+0x62,0xf1,0xfe,0x08,0x2e,0x51,0x7f
+
+# ATT:   vucomxsd  -1024(%edx), %xmm2
+# INTEL: vucomxsd xmm2, qword ptr [edx - 1024]
+0x62,0xf1,0xfe,0x08,0x2e,0x52,0x80
+
+# ATT:   vucomxsh %xmm3, %xmm2
+# INTEL: vucomxsh xmm2, xmm3
+0x62,0xf5,0x7f,0x08,0x2e,0xd3
+
+# ATT:   vucomxsh  268435456(%esp,%esi,8), %xmm2
+# INTEL: vucomxsh xmm2, word ptr [esp + 8*esi + 268435456]
+0x62,0xf5,0x7f,0x08,0x2e,0x94,0xf4,0x00,0x00,0x00,0x10
+
+# ATT:   vucomxsh  291(%edi,%eax,4), %xmm2
+# INTEL: vucomxsh xmm2, word ptr [edi + 4*eax + 291]
+0x62,0xf5,0x7f,0x08,0x2e,0x94,0x87,0x23,0x01,0x00,0x00
+
+# ATT:   vucomxsh  (%eax), %xmm2
+# INTEL: vucomxsh xmm2, word ptr [eax]
+0x62,0xf5,0x7f,0x08,0x2e,0x10
+
+# ATT:   vucomxsh  -64(,%ebp,2), %xmm2
+# INTEL: vucomxsh xmm2, word ptr [2*ebp - 64]
+0x62,0xf5,0x7f,0x08,0x2e,0x14,0x6d,0xc0,0xff,0xff,0xff
+
+# ATT:   vucomxsh  254(%ecx), %xmm2
+# INTEL: vucomxsh xmm2, word ptr [ecx + 254]
+0x62,0xf5,0x7f,0x08,0x2e,0x51,0x7f
+
+# ATT:   vucomxsh  -256(%edx), %xmm2
+# INTEL: vucomxsh xmm2, word ptr [edx - 256]
+0x62,0xf5,0x7f,0x08,0x2e,0x52,0x80
+
+# ATT:   vucomxss %xmm3, %xmm2
+# INTEL: vucomxss xmm2, xmm3
+0x62,0xf1,0x7f,0x08,0x2e,0xd3
+
+
+# ATT:   vucomxss  268435456(%esp,%esi,8), %xmm2
+# INTEL: vucomxss xmm2, dword ptr [esp + 8*esi + 268435456]
+0x62,0xf1,0x7f,0x08,0x2e,0x94,0xf4,0x00,0x00,0x00,0x10
+
+# ATT:   vucomxss  291(%edi,%eax,4), %xmm2
+# INTEL: vucomxss xmm2, dword ptr [edi + 4*eax + 291]
+0x62,0xf1,0x7f,0x08,0x2e,0x94,0x87,0x23,0x01,0x00,0x00
+
+# ATT:   vucomxss  (%eax), %xmm2
+# INTEL: vucomxss xmm2, dword ptr [eax]
+0x62,0xf1,0x7f,0x08,0x2e,0x10
+
+# ATT:   vucomxss  -128(,%ebp,2), %xmm2
+# INTEL: vucomxss xmm2, dword ptr [2*ebp - 128]
+0x62,0xf1,0x7f,0x08,0x2e,0x14,0x6d,0x80,0xff,0xff,0xff
+
+# ATT:   vucomxss  508(%ecx), %xmm2
+# INTEL: vucomxss xmm2, dword ptr [ecx + 508]
+0x62,0xf1,0x7f,0x08,0x2e,0x51,0x7f
+
+# ATT:   vucomxss  -512(%edx), %xmm2
+# INTEL: vucomxss xmm2, dword ptr [edx - 512]
+0x62,0xf1,0x7f,0x08,0x2e,0x52,0x80
+
diff --git a/llvm/test/MC/Disassembler/X86/avx512-com-ef-64.txt b/llvm/test/MC/Disassembler/X86/avx512-com-ef-64.txt
new file mode 100644
index 00000000000000..3ae5effb24a672
--- /dev/null
+++ b/llvm/test/MC/Disassembler/X86/avx512-com-ef-64.txt
@@ -0,0 +1,171 @@
+# RUN: llvm-mc --disassemble %s -triple=x86_64 | FileCheck %s --check-prefixes=ATT
+# RUN: llvm-mc --disassemble %s -triple=x86_64 -x86-asm-syntax=intel --output-asm-variant=1 | FileCheck %s --check-prefixes=INTEL
+
+# ATT:   vcomxsd %xmm23, %xmm22
+# INTEL: vcomxsd xmm22, xmm23
+0x62,0xa1,0xfe,0x08,0x2f,0xf7
+
+# ATT:   vcomxsd  268435456(%rbp,%r14,8), %xmm22
+# INTEL: vcomxsd xmm22, qword ptr [rbp + 8*r14 + 268435456]
+0x62,0xa1,0xfe,0x08,0x2f,0xb4,0xf5,0x00,0x00,0x00,0x10
+
+# ATT:   vcomxsd  291(%r8,%rax,4), %xmm22
+# INTEL: vcomxsd xmm22, qword ptr [r8 + 4*rax + 291]
+0x62,0xc1,0xfe,0x08,0x2f,0xb4,0x80,0x23,0x01,0x00,0x00
+
+# ATT:   vcomxsd  (%rip), %xmm22
+# INTEL: vcomxsd xmm22, qword ptr [rip]
+0x62,0xe1,0xfe,0x08,0x2f,0x35,0x00,0x00,0x00,0x00
+
+# ATT:   vcomxsd  -256(,%rbp,2), %xmm22
+# INTEL: vcomxsd xmm22, qword ptr [2*rbp - 256]
+0x62,0xe1,0xfe,0x08,0x2f,0x34,0x6d,0x00,0xff,0xff,0xff
+
+# ATT:   vcomxsd  1016(%rcx), %xmm22
+# INTEL: vcomxsd xmm22, qword ptr [rcx + 1016]
+0x62,0xe1,0xfe,0x08,0x2f,0x71,0x7f
+
+# ATT:   vcomxsd  -1024(%rdx), %xmm22
+# INTEL: vcomxsd xmm22, qword ptr [rdx - 1024]
+0x62,0xe1,0xfe,0x08,0x2f,0x72,0x80
+
+# ATT:   vcomxsh %xmm23, %xmm22
+# INTEL: vcomxsh xmm22, xmm23
+0x62,0xa5,0x7f,0x08,0x2f,0xf7
+
+# ATT:   vcomxsh  268435456(%rbp,%r14,8), %xmm22
+# INTEL: vcomxsh xmm22, word ptr [rbp + 8*r14 + 268435456]
+0x62,0xa5,0x7f,0x08,0x2f,0xb4,0xf5,0x00,0x00,0x00,0x10
+
+# ATT:   vcomxsh  291(%r8,%rax,4), %xmm22
+# INTEL: vcomxsh xmm22, word ptr [r8 + 4*rax + 291]
+0x62,0xc5,0x7f,0x08,0x2f,0xb4,0x80,0x23,0x01,0x00,0x00
+
+# ATT:   vcomxsh  (%rip), %xmm22
+# INTEL: vcomxsh xmm22, word ptr [rip]
+0x62,0xe5,0x7f,0x08,0x2f,0x35,0x00,0x00,0x00,0x00
+
+# ATT:   vcomxsh  -64(,%rbp,2), %xmm22
+# INTEL: vcomxsh xmm22, word ptr [2*rbp - 64]
+0x62,0xe5,0x7f,0x08,0x2f,0x34,0x6d,0xc0,0xff,0xff,0xff
+
+# ATT:   vcomxsh  254(%rcx), %xmm22
+# INTEL: vcomxsh xmm22, word ptr [rcx + 254]
+0x62,0xe5,0x7f,0x08,0x2f,0x71,0x7f
+
+# ATT:   vcomxsh  -256(%rdx), %xmm22
+# INTEL: vcomxsh xmm22, word ptr [rdx - 256]
+0x62,0xe5,0x7f,0x08,0x2f,0x72,0x80
+
+# ATT:   vcomxss %xmm23, %xmm22
+# INTEL: vcomxss xmm22, xmm23
+0x62,0xa1,0x7f,0x08,0x2f,0xf7
+
+# ATT:   vcomxss  268435456(%rbp,%r14,8), %xmm22
+# INTEL: vcomxss xmm22, dword ptr [rbp + 8*r14 + 268435456]
+0x62,0xa1,0x7f,0x08,0x2f,0xb4,0xf5,0x00,0x00,0x00,0x10
+
+# ATT:   vcomxss  291(%r8,%rax,4), %xmm22
+# INTEL: vcomxss xmm22, dword ptr [r8 + 4*rax + 291]
+0x62,0xc1,0x7f,0x08,0x2f,0xb4,0x80,0x23,0x01,0x00,0x00
+
+# ATT:   vcomxss  (%rip), %xmm22
+# INTEL: vcomxss xmm22, dword ptr [rip]
+0x62,0xe1,0x7f,0x08,0x2f,0x35,0x00,0x00,0x00,0x00
+
+# ATT:   vcomxss  -128(,%rbp,2), %xmm22
+# INTEL: vcomxss xmm22, dword ptr [2*rbp - 128]
+0x62,0xe1,0x7f,0x08,0x2f,0x34,0x6d,0x80,0xff,0xff,0xff
+
+# ATT:   vcomxss  508(%rcx), %xmm22
+# INTEL: vcomxss xmm22, dword ptr [rcx + 508]
+0x62,0xe1,0x7f,0x08,0x2f,0x71,0x7f
+
+# ATT:   vcomxss  -512(%rdx), %xmm22
+# INTEL: vcomxss xmm22, dword ptr [rdx - 512]
+0x62,0xe1,0x7f,0x08,0x2f,0x72,0x80
+
+# ATT:   vucomxsd %xmm23, %xmm22
+# INTEL: vucomxsd xmm22, xmm23
+0x62,0xa1,0xfe,0x08,0x2e,0xf7
+
+# ATT:   vucomxsd  268435456(%rbp,%r14,8), %xmm22
+# INTEL: vucomxsd xmm22, qword ptr [rbp + 8*r14 + 268435456]
+0x62,0xa1,0xfe,0x08,0x2e,0xb4,0xf5,0x00,0x00,0x00,0x10
+
+# ATT:   vucomxsd  291(%r8,%rax,4), %xmm22
+# INTEL: vucomxsd xmm22, qword ptr [r8 + 4*rax + 291]
+0x62,0xc1,0xfe,0x08,0x2e,0xb4,0x80,0x23,0x01,0x00,0x00
+
+# ATT:   vucomxsd  (%rip), %xmm22
+# INTEL: vucomxsd xmm22, qword ptr [rip]
+0x62,0xe1,0xfe,0x08,0x2e,0x35,0x00,0x00,0x00,0x00
+
+# ATT:   vucomxsd  -256(,%rbp,2), %xmm22
+# INTEL: vucomxsd xmm22, qword ptr [2*rbp - 256]
+0x62,0xe1,0xfe,0x08,0x2e,0x34,0x6d,0x00,0xff,0xff,0xff
+
+# ATT:   vucomxsd  1016(%rcx), %xmm22
+# INTEL: vucomxsd xmm22, qword ptr [rcx + 1016]
+0x62,0xe1,0xfe,0x08,0x2e,0x71,0x7f
+
+# ATT:   vucomxsd  -1024(%rdx), %xmm22
+# INTEL: vucomxsd xmm22, qword ptr [rdx - 1024]
+0x62,0xe1,0xfe,0x08,0x2e,0x72,0x80
+
+# ATT:   vucomxsh %xmm23, %xmm22
+# INTEL: vucomxsh xmm22, xmm23
+0x62,0xa5,0x7f,0x08,0x2e,0xf7
+
+# ATT:   vucomxsh  268435456(%rbp,%r14,8), %xmm22
+# INTEL: vucomxsh xmm22, word ptr [rbp + 8*r14 + 268435456]
+0x62,0xa5,0x7f,0x08,0x2e,0xb4,0xf5,0x00,0x00,0x00,0x10
+
+# ATT:   vucomxsh  291(%r8,%rax,4), %xmm22
+# INTEL: vucomxsh xmm22, word ptr [r8 + 4*rax + 291]
+0x62,0xc5,0x7f,0x08,0x2e,0xb4,0x80,0x23,0x01,0x00,0x00
+
+# ATT:   vucomxsh  (%rip), %xmm22
+# INTEL: vucomxsh xmm22, word ptr [rip]
+0x62,0xe5,0x7f,0x08,0x2e,0x35,0x00,0x00,0x00,0x00
+
+# ATT:   vucomxsh  -64(,%rbp,2), %xmm22
+# INTEL: vucomxsh xmm22, word ptr [2*rbp - 64]
+0x62,0xe5,0x7f,0x08,0x2e,0x34,0x6d,0xc0,0xff,0xff,0xff
+
+# ATT:   vucomxsh  254(%rcx), %xmm22
+# INTEL: vucomxsh xmm22, word ptr [rcx + 254]
+0x62,0xe5,0x7f,0x08,0x2e,0x71,0x7f
+
+# ATT:   vucomxsh  -256(%rdx), %xmm22
+# INTEL: vucomxsh xmm22, word ptr [rdx - 256]
+0x62,0xe5,0x7f,0x08,0x2e,0x72,0x80
+
+# ATT:   vucomxss %xmm23, %xmm22
+# INTEL: vucomxss xmm22, xmm23
+0x62,0xa1,0x7f,0x08,0x2e,0xf7
+
+# ATT:   vucomxss  268435456(%rbp,%r14,8), %xmm22
+# INTEL: vucomxss xmm22, dword ptr [rbp + 8*r14 + 268435456]
+0x62,0xa1,0x7f,0x08,0x2e,0xb4,0xf5,0x00,0x00,0x00,0x10
+
+# ATT:   vucomxss  291(%r8,%rax,4), %xmm22
+# INTEL: vucomxss xmm22, dword ptr [r8 + 4*rax + 291]
+0x62,0xc1,0x7f,0x08,0x2e,0xb4,0x80,0x23,0x01,0x00,0x00
+
+# ATT:   vucomxss  (%rip), %xmm22
+# INTEL: vucomxss xmm22, dword ptr [rip]
+0x62,0xe1,0x7f,0x08,0x2e,0x35,0x00,0x00,0x00,0x00
+
+# ATT:   vucomxss  -128(,%rbp,2), %xmm22
+# INTEL: vucomxss xmm22, dword ptr [2*rbp - 128]
+0x62,0xe1,0x7f,0x08,0x2e,0x34,0x6d,0x80,0xff,0xff,0xff
+
+# ATT:   vucomxss  508(%rcx), %xmm22
+# INTEL: vucomxss xmm22, dword ptr [rcx + 508]
+0x62,0xe1,0x7f,0x08,0x2e,0x71,0x7f
+
+# ATT:   vucomxss  -512(%rdx), %xmm22
+# INTEL: vucomxss xmm22, dword ptr [rdx - 512]
+0x62,0xe1,0x7f,0x08,0x2e,0x72,0x80
+
diff --git a/llvm/test/MC/X86/avx512-com-ef-32-att.s b/llvm/test/MC/X86/avx512-com-ef-32-att.s
new file mode 100644
index 00000000000000..4838adc151cbae
--- /dev/null
+++ b/llvm/test/MC/X86/avx512-com-ef-32-att.s
@@ -0,0 +1,170 @@
+// RUN: llvm-mc -triple i386 --show-encoding %s | FileCheck %s
+
+// CHECK: vcomxsd %xmm3, %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0xd3]
+          vcomxsd %xmm3, %xmm2
+
+// CHECK: vcomxsd  268435456(%esp,%esi,8), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vcomxsd  268435456(%esp,%esi,8), %xmm2
+
+// CHECK: vcomxsd  291(%edi,%eax,4), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x94,0x87,0x23,0x01,0x00,0x00]
+          vcomxsd  291(%edi,%eax,4), %xmm2
+
+// CHECK: vcomxsd  (%eax), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x10]
+          vcomxsd  (%eax), %xmm2
+
+// CHECK: vcomxsd  -256(,%ebp,2), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x14,0x6d,0x00,0xff,0xff,0xff]
+          vcomxsd  -256(,%ebp,2), %xmm2
+
+// CHECK: vcomxsd  1016(%ecx), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x51,0x7f]
+          vcomxsd  1016(%ecx), %xmm2
+
+// CHECK: vcomxsd  -1024(%edx), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x52,0x80]
+          vcomxsd  -1024(%edx), %xmm2
+
+// CHECK: vcomxsh %xmm3, %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0xd3]
+          vcomxsh %xmm3, %xmm2
+
+// CHECK: vcomxsh  268435456(%esp,%esi,8), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vcomxsh  268435456(%esp,%esi,8), %xmm2
+
+// CHECK: vcomxsh  291(%edi,%eax,4), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x94,0x87,0x23,0x01,0x00,0x00]
+          vcomxsh  291(%edi,%eax,4), %xmm2
+
+// CHECK: vcomxsh  (%eax), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x10]
+          vcomxsh  (%eax), %xmm2
+
+// CHECK: vcomxsh  -64(,%ebp,2), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x14,0x6d,0xc0,0xff,0xff,0xff]
+          vcomxsh  -64(,%ebp,2), %xmm2
+
+// CHECK: vcomxsh  254(%ecx), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x51,0x7f]
+          vcomxsh  254(%ecx), %xmm2
+
+// CHECK: vcomxsh  -256(%edx), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x52,0x80]
+          vcomxsh  -256(%edx), %xmm2
+
+// CHECK: vcomxss %xmm3, %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0xd3]
+          vcomxss %xmm3, %xmm2
+
+// CHECK: vcomxss  268435456(%esp,%esi,8), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vcomxss  268435456(%esp,%esi,8), %xmm2
+
+// CHECK: vcomxss  291(%edi,%eax,4), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x94,0x87,0x23,0x01,0x00,0x00]
+          vcomxss  291(%edi,%eax,4), %xmm2
+
+// CHECK: vcomxss  (%eax), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x10]
+          vcomxss  (%eax), %xmm2
+
+// CHECK: vcomxss  -128(,%ebp,2), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x14,0x6d,0x80,0xff,0xff,0xff]
+          vcomxss  -128(,%ebp,2), %xmm2
+
+// CHECK: vcomxss  508(%ecx), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x51,0x7f]
+          vcomxss  508(%ecx), %xmm2
+
+// CHECK: vcomxss  -512(%edx), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x52,0x80]
+          vcomxss  -512(%edx), %xmm2
+
+// CHECK: vucomxsd %xmm3, %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0xd3]
+          vucomxsd %xmm3, %xmm2
+
+// CHECK: vucomxsd  268435456(%esp,%esi,8), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vucomxsd  268435456(%esp,%esi,8), %xmm2
+
+// CHECK: vucomxsd  291(%edi,%eax,4), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x94,0x87,0x23,0x01,0x00,0x00]
+          vucomxsd  291(%edi,%eax,4), %xmm2
+
+// CHECK: vucomxsd  (%eax), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x10]
+          vucomxsd  (%eax), %xmm2
+
+// CHECK: vucomxsd  -256(,%ebp,2), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x14,0x6d,0x00,0xff,0xff,0xff]
+          vucomxsd  -256(,%ebp,2), %xmm2
+
+// CHECK: vucomxsd  1016(%ecx), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x51,0x7f]
+          vucomxsd  1016(%ecx), %xmm2
+
+// CHECK: vucomxsd  -1024(%edx), %xmm2
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x52,0x80]
+          vucomxsd  -1024(%edx), %xmm2
+
+// CHECK: vucomxsh %xmm3, %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0xd3]
+          vucomxsh %xmm3, %xmm2
+
+// CHECK: vucomxsh  268435456(%esp,%esi,8), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vucomxsh  268435456(%esp,%esi,8), %xmm2
+
+// CHECK: vucomxsh  291(%edi,%eax,4), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x94,0x87,0x23,0x01,0x00,0x00]
+          vucomxsh  291(%edi,%eax,4), %xmm2
+
+// CHECK: vucomxsh  (%eax), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x10]
+          vucomxsh  (%eax), %xmm2
+
+// CHECK: vucomxsh  -64(,%ebp,2), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x14,0x6d,0xc0,0xff,0xff,0xff]
+          vucomxsh  -64(,%ebp,2), %xmm2
+
+// CHECK: vucomxsh  254(%ecx), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x51,0x7f]
+          vucomxsh  254(%ecx), %xmm2
+
+// CHECK: vucomxsh  -256(%edx), %xmm2
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x52,0x80]
+          vucomxsh  -256(%edx), %xmm2
+
+// CHECK: vucomxss %xmm3, %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0xd3]
+          vucomxss %xmm3, %xmm2
+
+// CHECK: vucomxss  268435456(%esp,%esi,8), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vucomxss  268435456(%esp,%esi,8), %xmm2
+
+// CHECK: vucomxss  291(%edi,%eax,4), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x94,0x87,0x23,0x01,0x00,0x00]
+          vucomxss  291(%edi,%eax,4), %xmm2
+
+// CHECK: vucomxss  (%eax), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x10]
+          vucomxss  (%eax), %xmm2
+
+// CHECK: vucomxss  -128(,%ebp,2), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x14,0x6d,0x80,0xff,0xff,0xff]
+          vucomxss  -128(,%ebp,2), %xmm2
+
+// CHECK: vucomxss  508(%ecx), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x51,0x7f]
+          vucomxss  508(%ecx), %xmm2
+
+// CHECK: vucomxss  -512(%edx), %xmm2
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x52,0x80]
+          vucomxss  -512(%edx), %xmm2
+
diff --git a/llvm/test/MC/X86/avx512-com-ef-32-intel.s b/llvm/test/MC/X86/avx512-com-ef-32-intel.s
new file mode 100644
index 00000000000000..5be9aeaf4c265e
--- /dev/null
+++ b/llvm/test/MC/X86/avx512-com-ef-32-intel.s
@@ -0,0 +1,170 @@
+// RUN: llvm-mc -triple i386 -x86-asm-syntax=intel -output-asm-variant=1 --show-encoding %s | FileCheck %s
+
+// CHECK: vcomxsd xmm2, xmm3
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0xd3]
+          vcomxsd xmm2, xmm3
+
+// CHECK: vcomxsd xmm2, qword ptr [esp + 8*esi + 268435456]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vcomxsd xmm2, qword ptr [esp + 8*esi + 268435456]
+
+// CHECK: vcomxsd xmm2, qword ptr [edi + 4*eax + 291]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x94,0x87,0x23,0x01,0x00,0x00]
+          vcomxsd xmm2, qword ptr [edi + 4*eax + 291]
+
+// CHECK: vcomxsd xmm2, qword ptr [eax]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x10]
+          vcomxsd xmm2, qword ptr [eax]
+
+// CHECK: vcomxsd xmm2, qword ptr [2*ebp - 256]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x14,0x6d,0x00,0xff,0xff,0xff]
+          vcomxsd xmm2, qword ptr [2*ebp - 256]
+
+// CHECK: vcomxsd xmm2, qword ptr [ecx + 1016]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x51,0x7f]
+          vcomxsd xmm2, qword ptr [ecx + 1016]
+
+// CHECK: vcomxsd xmm2, qword ptr [edx - 1024]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2f,0x52,0x80]
+          vcomxsd xmm2, qword ptr [edx - 1024]
+
+// CHECK: vcomxsh xmm2, xmm3
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0xd3]
+          vcomxsh xmm2, xmm3
+
+// CHECK: vcomxsh xmm2, word ptr [esp + 8*esi + 268435456]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vcomxsh xmm2, word ptr [esp + 8*esi + 268435456]
+
+// CHECK: vcomxsh xmm2, word ptr [edi + 4*eax + 291]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x94,0x87,0x23,0x01,0x00,0x00]
+          vcomxsh xmm2, word ptr [edi + 4*eax + 291]
+
+// CHECK: vcomxsh xmm2, word ptr [eax]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x10]
+          vcomxsh xmm2, word ptr [eax]
+
+// CHECK: vcomxsh xmm2, word ptr [2*ebp - 64]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x14,0x6d,0xc0,0xff,0xff,0xff]
+          vcomxsh xmm2, word ptr [2*ebp - 64]
+
+// CHECK: vcomxsh xmm2, word ptr [ecx + 254]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x51,0x7f]
+          vcomxsh xmm2, word ptr [ecx + 254]
+
+// CHECK: vcomxsh xmm2, word ptr [edx - 256]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2f,0x52,0x80]
+          vcomxsh xmm2, word ptr [edx - 256]
+
+// CHECK: vcomxss xmm2, xmm3
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0xd3]
+          vcomxss xmm2, xmm3
+
+// CHECK: vcomxss xmm2, dword ptr [esp + 8*esi + 268435456]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vcomxss xmm2, dword ptr [esp + 8*esi + 268435456]
+
+// CHECK: vcomxss xmm2, dword ptr [edi + 4*eax + 291]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x94,0x87,0x23,0x01,0x00,0x00]
+          vcomxss xmm2, dword ptr [edi + 4*eax + 291]
+
+// CHECK: vcomxss xmm2, dword ptr [eax]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x10]
+          vcomxss xmm2, dword ptr [eax]
+
+// CHECK: vcomxss xmm2, dword ptr [2*ebp - 128]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x14,0x6d,0x80,0xff,0xff,0xff]
+          vcomxss xmm2, dword ptr [2*ebp - 128]
+
+// CHECK: vcomxss xmm2, dword ptr [ecx + 508]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x51,0x7f]
+          vcomxss xmm2, dword ptr [ecx + 508]
+
+// CHECK: vcomxss xmm2, dword ptr [edx - 512]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2f,0x52,0x80]
+          vcomxss xmm2, dword ptr [edx - 512]
+
+// CHECK: vucomxsd xmm2, xmm3
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0xd3]
+          vucomxsd xmm2, xmm3
+
+// CHECK: vucomxsd xmm2, qword ptr [esp + 8*esi + 268435456]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vucomxsd xmm2, qword ptr [esp + 8*esi + 268435456]
+
+// CHECK: vucomxsd xmm2, qword ptr [edi + 4*eax + 291]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x94,0x87,0x23,0x01,0x00,0x00]
+          vucomxsd xmm2, qword ptr [edi + 4*eax + 291]
+
+// CHECK: vucomxsd xmm2, qword ptr [eax]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x10]
+          vucomxsd xmm2, qword ptr [eax]
+
+// CHECK: vucomxsd xmm2, qword ptr [2*ebp - 256]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x14,0x6d,0x00,0xff,0xff,0xff]
+          vucomxsd xmm2, qword ptr [2*ebp - 256]
+
+// CHECK: vucomxsd xmm2, qword ptr [ecx + 1016]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x51,0x7f]
+          vucomxsd xmm2, qword ptr [ecx + 1016]
+
+// CHECK: vucomxsd xmm2, qword ptr [edx - 1024]
+// CHECK: encoding: [0x62,0xf1,0xfe,0x08,0x2e,0x52,0x80]
+          vucomxsd xmm2, qword ptr [edx - 1024]
+
+// CHECK: vucomxsh xmm2, xmm3
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0xd3]
+          vucomxsh xmm2, xmm3
+
+// CHECK: vucomxsh xmm2, word ptr [esp + 8*esi + 268435456]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vucomxsh xmm2, word ptr [esp + 8*esi + 268435456]
+
+// CHECK: vucomxsh xmm2, word ptr [edi + 4*eax + 291]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x94,0x87,0x23,0x01,0x00,0x00]
+          vucomxsh xmm2, word ptr [edi + 4*eax + 291]
+
+// CHECK: vucomxsh xmm2, word ptr [eax]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x10]
+          vucomxsh xmm2, word ptr [eax]
+
+// CHECK: vucomxsh xmm2, word ptr [2*ebp - 64]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x14,0x6d,0xc0,0xff,0xff,0xff]
+          vucomxsh xmm2, word ptr [2*ebp - 64]
+
+// CHECK: vucomxsh xmm2, word ptr [ecx + 254]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x51,0x7f]
+          vucomxsh xmm2, word ptr [ecx + 254]
+
+// CHECK: vucomxsh xmm2, word ptr [edx - 256]
+// CHECK: encoding: [0x62,0xf5,0x7f,0x08,0x2e,0x52,0x80]
+          vucomxsh xmm2, word ptr [edx - 256]
+
+// CHECK: vucomxss xmm2, xmm3
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0xd3]
+          vucomxss xmm2, xmm3
+
+// CHECK: vucomxss xmm2, dword ptr [esp + 8*esi + 268435456]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x94,0xf4,0x00,0x00,0x00,0x10]
+          vucomxss xmm2, dword ptr [esp + 8*esi + 268435456]
+
+// CHECK: vucomxss xmm2, dword ptr [edi + 4*eax + 291]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x94,0x87,0x23,0x01,0x00,0x00]
+          vucomxss xmm2, dword ptr [edi + 4*eax + 291]
+
+// CHECK: vucomxss xmm2, dword ptr [eax]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x10]
+          vucomxss xmm2, dword ptr [eax]
+
+// CHECK: vucomxss xmm2, dword ptr [2*ebp - 128]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x14,0x6d,0x80,0xff,0xff,0xff]
+          vucomxss xmm2, dword ptr [2*ebp - 128]
+
+// CHECK: vucomxss xmm2, dword ptr [ecx + 508]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x51,0x7f]
+          vucomxss xmm2, dword ptr [ecx + 508]
+
+// CHECK: vucomxss xmm2, dword ptr [edx - 512]
+// CHECK: encoding: [0x62,0xf1,0x7f,0x08,0x2e,0x52,0x80]
+          vucomxss xmm2, dword ptr [edx - 512]
+
diff --git a/llvm/test/MC/X86/avx512-com-ef-64-att.s b/llvm/test/MC/X86/avx512-com-ef-64-att.s
new file mode 100644
index 00000000000000..cfa6d97a5a825d
--- /dev/null
+++ b/llvm/test/MC/X86/avx512-com-ef-64-att.s
@@ -0,0 +1,170 @@
+// RUN: llvm-mc -triple x86_64 --show-encoding %s | FileCheck %s
+
+// CHECK: vcomxsd %xmm23, %xmm22
+// CHECK: encoding: [0x62,0xa1,0xfe,0x08,0x2f,0xf7]
+          vcomxsd %xmm23, %xmm22
+
+// CHECK: vcomxsd  268435456(%rbp,%r14,8), %xmm22
+// CHECK: encoding: [0x62,0xa1,0xfe,0x08,0x2f,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vcomxsd  268435456(%rbp,%r14,8), %xmm22
+
+// CHECK: vcomxsd  291(%r8,%rax,4), %xmm22
+// CHECK: encoding: [0x62,0xc1,0xfe,0x08,0x2f,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vcomxsd  291(%r8,%rax,4), %xmm22
+
+// CHECK: vcomxsd  (%rip), %xmm22
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2f,0x35,0x00,0x00,0x00,0x00]
+          vcomxsd  (%rip), %xmm22
+
+// CHECK: vcomxsd  -256(,%rbp,2), %xmm22
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2f,0x34,0x6d,0x00,0xff,0xff,0xff]
+          vcomxsd  -256(,%rbp,2), %xmm22
+
+// CHECK: vcomxsd  1016(%rcx), %xmm22
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2f,0x71,0x7f]
+          vcomxsd  1016(%rcx), %xmm22
+
+// CHECK: vcomxsd  -1024(%rdx), %xmm22
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2f,0x72,0x80]
+          vcomxsd  -1024(%rdx), %xmm22
+
+// CHECK: vcomxsh %xmm23, %xmm22
+// CHECK: encoding: [0x62,0xa5,0x7f,0x08,0x2f,0xf7]
+          vcomxsh %xmm23, %xmm22
+
+// CHECK: vcomxsh  268435456(%rbp,%r14,8), %xmm22
+// CHECK: encoding: [0x62,0xa5,0x7f,0x08,0x2f,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vcomxsh  268435456(%rbp,%r14,8), %xmm22
+
+// CHECK: vcomxsh  291(%r8,%rax,4), %xmm22
+// CHECK: encoding: [0x62,0xc5,0x7f,0x08,0x2f,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vcomxsh  291(%r8,%rax,4), %xmm22
+
+// CHECK: vcomxsh  (%rip), %xmm22
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2f,0x35,0x00,0x00,0x00,0x00]
+          vcomxsh  (%rip), %xmm22
+
+// CHECK: vcomxsh  -64(,%rbp,2), %xmm22
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2f,0x34,0x6d,0xc0,0xff,0xff,0xff]
+          vcomxsh  -64(,%rbp,2), %xmm22
+
+// CHECK: vcomxsh  254(%rcx), %xmm22
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2f,0x71,0x7f]
+          vcomxsh  254(%rcx), %xmm22
+
+// CHECK: vcomxsh  -256(%rdx), %xmm22
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2f,0x72,0x80]
+          vcomxsh  -256(%rdx), %xmm22
+
+// CHECK: vcomxss %xmm23, %xmm22
+// CHECK: encoding: [0x62,0xa1,0x7f,0x08,0x2f,0xf7]
+          vcomxss %xmm23, %xmm22
+
+// CHECK: vcomxss  268435456(%rbp,%r14,8), %xmm22
+// CHECK: encoding: [0x62,0xa1,0x7f,0x08,0x2f,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vcomxss  268435456(%rbp,%r14,8), %xmm22
+
+// CHECK: vcomxss  291(%r8,%rax,4), %xmm22
+// CHECK: encoding: [0x62,0xc1,0x7f,0x08,0x2f,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vcomxss  291(%r8,%rax,4), %xmm22
+
+// CHECK: vcomxss  (%rip), %xmm22
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2f,0x35,0x00,0x00,0x00,0x00]
+          vcomxss  (%rip), %xmm22
+
+// CHECK: vcomxss  -128(,%rbp,2), %xmm22
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2f,0x34,0x6d,0x80,0xff,0xff,0xff]
+          vcomxss  -128(,%rbp,2), %xmm22
+
+// CHECK: vcomxss  508(%rcx), %xmm22
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2f,0x71,0x7f]
+          vcomxss  508(%rcx), %xmm22
+
+// CHECK: vcomxss  -512(%rdx), %xmm22
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2f,0x72,0x80]
+          vcomxss  -512(%rdx), %xmm22
+
+// CHECK: vucomxsd %xmm23, %xmm22
+// CHECK: encoding: [0x62,0xa1,0xfe,0x08,0x2e,0xf7]
+          vucomxsd %xmm23, %xmm22
+
+// CHECK: vucomxsd  268435456(%rbp,%r14,8), %xmm22
+// CHECK: encoding: [0x62,0xa1,0xfe,0x08,0x2e,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vucomxsd  268435456(%rbp,%r14,8), %xmm22
+
+// CHECK: vucomxsd  291(%r8,%rax,4), %xmm22
+// CHECK: encoding: [0x62,0xc1,0xfe,0x08,0x2e,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vucomxsd  291(%r8,%rax,4), %xmm22
+
+// CHECK: vucomxsd  (%rip), %xmm22
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2e,0x35,0x00,0x00,0x00,0x00]
+          vucomxsd  (%rip), %xmm22
+
+// CHECK: vucomxsd  -256(,%rbp,2), %xmm22
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2e,0x34,0x6d,0x00,0xff,0xff,0xff]
+          vucomxsd  -256(,%rbp,2), %xmm22
+
+// CHECK: vucomxsd  1016(%rcx), %xmm22
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2e,0x71,0x7f]
+          vucomxsd  1016(%rcx), %xmm22
+
+// CHECK: vucomxsd  -1024(%rdx), %xmm22
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2e,0x72,0x80]
+          vucomxsd  -1024(%rdx), %xmm22
+
+// CHECK: vucomxsh %xmm23, %xmm22
+// CHECK: encoding: [0x62,0xa5,0x7f,0x08,0x2e,0xf7]
+          vucomxsh %xmm23, %xmm22
+
+// CHECK: vucomxsh  268435456(%rbp,%r14,8), %xmm22
+// CHECK: encoding: [0x62,0xa5,0x7f,0x08,0x2e,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vucomxsh  268435456(%rbp,%r14,8), %xmm22
+
+// CHECK: vucomxsh  291(%r8,%rax,4), %xmm22
+// CHECK: encoding: [0x62,0xc5,0x7f,0x08,0x2e,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vucomxsh  291(%r8,%rax,4), %xmm22
+
+// CHECK: vucomxsh  (%rip), %xmm22
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2e,0x35,0x00,0x00,0x00,0x00]
+          vucomxsh  (%rip), %xmm22
+
+// CHECK: vucomxsh  -64(,%rbp,2), %xmm22
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2e,0x34,0x6d,0xc0,0xff,0xff,0xff]
+          vucomxsh  -64(,%rbp,2), %xmm22
+
+// CHECK: vucomxsh  254(%rcx), %xmm22
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2e,0x71,0x7f]
+          vucomxsh  254(%rcx), %xmm22
+
+// CHECK: vucomxsh  -256(%rdx), %xmm22
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2e,0x72,0x80]
+          vucomxsh  -256(%rdx), %xmm22
+
+// CHECK: vucomxss %xmm23, %xmm22
+// CHECK: encoding: [0x62,0xa1,0x7f,0x08,0x2e,0xf7]
+          vucomxss %xmm23, %xmm22
+
+// CHECK: vucomxss  268435456(%rbp,%r14,8), %xmm22
+// CHECK: encoding: [0x62,0xa1,0x7f,0x08,0x2e,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vucomxss  268435456(%rbp,%r14,8), %xmm22
+
+// CHECK: vucomxss  291(%r8,%rax,4), %xmm22
+// CHECK: encoding: [0x62,0xc1,0x7f,0x08,0x2e,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vucomxss  291(%r8,%rax,4), %xmm22
+
+// CHECK: vucomxss  (%rip), %xmm22
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2e,0x35,0x00,0x00,0x00,0x00]
+          vucomxss  (%rip), %xmm22
+
+// CHECK: vucomxss  -128(,%rbp,2), %xmm22
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2e,0x34,0x6d,0x80,0xff,0xff,0xff]
+          vucomxss  -128(,%rbp,2), %xmm22
+
+// CHECK: vucomxss  508(%rcx), %xmm22
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2e,0x71,0x7f]
+          vucomxss  508(%rcx), %xmm22
+
+// CHECK: vucomxss  -512(%rdx), %xmm22
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2e,0x72,0x80]
+          vucomxss  -512(%rdx), %xmm22
+
diff --git a/llvm/test/MC/X86/avx512-com-ef-64-intel.s b/llvm/test/MC/X86/avx512-com-ef-64-intel.s
new file mode 100644
index 00000000000000..718e6bc476c3bd
--- /dev/null
+++ b/llvm/test/MC/X86/avx512-com-ef-64-intel.s
@@ -0,0 +1,170 @@
+// RUN: llvm-mc -triple x86_64 -x86-asm-syntax=intel -output-asm-variant=1 --show-encoding %s | FileCheck %s
+
+// CHECK: vcomxsd xmm22, xmm23
+// CHECK: encoding: [0x62,0xa1,0xfe,0x08,0x2f,0xf7]
+          vcomxsd xmm22, xmm23
+
+// CHECK: vcomxsd xmm22, qword ptr [rbp + 8*r14 + 268435456]
+// CHECK: encoding: [0x62,0xa1,0xfe,0x08,0x2f,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vcomxsd xmm22, qword ptr [rbp + 8*r14 + 268435456]
+
+// CHECK: vcomxsd xmm22, qword ptr [r8 + 4*rax + 291]
+// CHECK: encoding: [0x62,0xc1,0xfe,0x08,0x2f,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vcomxsd xmm22, qword ptr [r8 + 4*rax + 291]
+
+// CHECK: vcomxsd xmm22, qword ptr [rip]
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2f,0x35,0x00,0x00,0x00,0x00]
+          vcomxsd xmm22, qword ptr [rip]
+
+// CHECK: vcomxsd xmm22, qword ptr [2*rbp - 256]
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2f,0x34,0x6d,0x00,0xff,0xff,0xff]
+          vcomxsd xmm22, qword ptr [2*rbp - 256]
+
+// CHECK: vcomxsd xmm22, qword ptr [rcx + 1016]
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2f,0x71,0x7f]
+          vcomxsd xmm22, qword ptr [rcx + 1016]
+
+// CHECK: vcomxsd xmm22, qword ptr [rdx - 1024]
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2f,0x72,0x80]
+          vcomxsd xmm22, qword ptr [rdx - 1024]
+
+// CHECK: vcomxsh xmm22, xmm23
+// CHECK: encoding: [0x62,0xa5,0x7f,0x08,0x2f,0xf7]
+          vcomxsh xmm22, xmm23
+
+// CHECK: vcomxsh xmm22, word ptr [rbp + 8*r14 + 268435456]
+// CHECK: encoding: [0x62,0xa5,0x7f,0x08,0x2f,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vcomxsh xmm22, word ptr [rbp + 8*r14 + 268435456]
+
+// CHECK: vcomxsh xmm22, word ptr [r8 + 4*rax + 291]
+// CHECK: encoding: [0x62,0xc5,0x7f,0x08,0x2f,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vcomxsh xmm22, word ptr [r8 + 4*rax + 291]
+
+// CHECK: vcomxsh xmm22, word ptr [rip]
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2f,0x35,0x00,0x00,0x00,0x00]
+          vcomxsh xmm22, word ptr [rip]
+
+// CHECK: vcomxsh xmm22, word ptr [2*rbp - 64]
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2f,0x34,0x6d,0xc0,0xff,0xff,0xff]
+          vcomxsh xmm22, word ptr [2*rbp - 64]
+
+// CHECK: vcomxsh xmm22, word ptr [rcx + 254]
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2f,0x71,0x7f]
+          vcomxsh xmm22, word ptr [rcx + 254]
+
+// CHECK: vcomxsh xmm22, word ptr [rdx - 256]
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2f,0x72,0x80]
+          vcomxsh xmm22, word ptr [rdx - 256]
+
+// CHECK: vcomxss xmm22, xmm23
+// CHECK: encoding: [0x62,0xa1,0x7f,0x08,0x2f,0xf7]
+          vcomxss xmm22, xmm23
+
+// CHECK: vcomxss xmm22, dword ptr [rbp + 8*r14 + 268435456]
+// CHECK: encoding: [0x62,0xa1,0x7f,0x08,0x2f,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vcomxss xmm22, dword ptr [rbp + 8*r14 + 268435456]
+
+// CHECK: vcomxss xmm22, dword ptr [r8 + 4*rax + 291]
+// CHECK: encoding: [0x62,0xc1,0x7f,0x08,0x2f,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vcomxss xmm22, dword ptr [r8 + 4*rax + 291]
+
+// CHECK: vcomxss xmm22, dword ptr [rip]
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2f,0x35,0x00,0x00,0x00,0x00]
+          vcomxss xmm22, dword ptr [rip]
+
+// CHECK: vcomxss xmm22, dword ptr [2*rbp - 128]
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2f,0x34,0x6d,0x80,0xff,0xff,0xff]
+          vcomxss xmm22, dword ptr [2*rbp - 128]
+
+// CHECK: vcomxss xmm22, dword ptr [rcx + 508]
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2f,0x71,0x7f]
+          vcomxss xmm22, dword ptr [rcx + 508]
+
+// CHECK: vcomxss xmm22, dword ptr [rdx - 512]
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2f,0x72,0x80]
+          vcomxss xmm22, dword ptr [rdx - 512]
+
+// CHECK: vucomxsd xmm22, xmm23
+// CHECK: encoding: [0x62,0xa1,0xfe,0x08,0x2e,0xf7]
+          vucomxsd xmm22, xmm23
+
+// CHECK: vucomxsd xmm22, qword ptr [rbp + 8*r14 + 268435456]
+// CHECK: encoding: [0x62,0xa1,0xfe,0x08,0x2e,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vucomxsd xmm22, qword ptr [rbp + 8*r14 + 268435456]
+
+// CHECK: vucomxsd xmm22, qword ptr [r8 + 4*rax + 291]
+// CHECK: encoding: [0x62,0xc1,0xfe,0x08,0x2e,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vucomxsd xmm22, qword ptr [r8 + 4*rax + 291]
+
+// CHECK: vucomxsd xmm22, qword ptr [rip]
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2e,0x35,0x00,0x00,0x00,0x00]
+          vucomxsd xmm22, qword ptr [rip]
+
+// CHECK: vucomxsd xmm22, qword ptr [2*rbp - 256]
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2e,0x34,0x6d,0x00,0xff,0xff,0xff]
+          vucomxsd xmm22, qword ptr [2*rbp - 256]
+
+// CHECK: vucomxsd xmm22, qword ptr [rcx + 1016]
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2e,0x71,0x7f]
+          vucomxsd xmm22, qword ptr [rcx + 1016]
+
+// CHECK: vucomxsd xmm22, qword ptr [rdx - 1024]
+// CHECK: encoding: [0x62,0xe1,0xfe,0x08,0x2e,0x72,0x80]
+          vucomxsd xmm22, qword ptr [rdx - 1024]
+
+// CHECK: vucomxsh xmm22, xmm23
+// CHECK: encoding: [0x62,0xa5,0x7f,0x08,0x2e,0xf7]
+          vucomxsh xmm22, xmm23
+
+// CHECK: vucomxsh xmm22, word ptr [rbp + 8*r14 + 268435456]
+// CHECK: encoding: [0x62,0xa5,0x7f,0x08,0x2e,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vucomxsh xmm22, word ptr [rbp + 8*r14 + 268435456]
+
+// CHECK: vucomxsh xmm22, word ptr [r8 + 4*rax + 291]
+// CHECK: encoding: [0x62,0xc5,0x7f,0x08,0x2e,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vucomxsh xmm22, word ptr [r8 + 4*rax + 291]
+
+// CHECK: vucomxsh xmm22, word ptr [rip]
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2e,0x35,0x00,0x00,0x00,0x00]
+          vucomxsh xmm22, word ptr [rip]
+
+// CHECK: vucomxsh xmm22, word ptr [2*rbp - 64]
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2e,0x34,0x6d,0xc0,0xff,0xff,0xff]
+          vucomxsh xmm22, word ptr [2*rbp - 64]
+
+// CHECK: vucomxsh xmm22, word ptr [rcx + 254]
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2e,0x71,0x7f]
+          vucomxsh xmm22, word ptr [rcx + 254]
+
+// CHECK: vucomxsh xmm22, word ptr [rdx - 256]
+// CHECK: encoding: [0x62,0xe5,0x7f,0x08,0x2e,0x72,0x80]
+          vucomxsh xmm22, word ptr [rdx - 256]
+
+// CHECK: vucomxss xmm22, xmm23
+// CHECK: encoding: [0x62,0xa1,0x7f,0x08,0x2e,0xf7]
+          vucomxss xmm22, xmm23
+
+// CHECK: vucomxss xmm22, dword ptr [rbp + 8*r14 + 268435456]
+// CHECK: encoding: [0x62,0xa1,0x7f,0x08,0x2e,0xb4,0xf5,0x00,0x00,0x00,0x10]
+          vucomxss xmm22, dword ptr [rbp + 8*r14 + 268435456]
+
+// CHECK: vucomxss xmm22, dword ptr [r8 + 4*rax + 291]
+// CHECK: encoding: [0x62,0xc1,0x7f,0x08,0x2e,0xb4,0x80,0x23,0x01,0x00,0x00]
+          vucomxss xmm22, dword ptr [r8 + 4*rax + 291]
+
+// CHECK: vucomxss xmm22, dword ptr [rip]
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2e,0x35,0x00,0x00,0x00,0x00]
+          vucomxss xmm22, dword ptr [rip]
+
+// CHECK: vucomxss xmm22, dword ptr [2*rbp - 128]
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2e,0x34,0x6d,0x80,0xff,0xff,0xff]
+          vucomxss xmm22, dword ptr [2*rbp - 128]
+
+// CHECK: vucomxss xmm22, dword ptr [rcx + 508]
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2e,0x71,0x7f]
+          vucomxss xmm22, dword ptr [rcx + 508]
+
+// CHECK: vucomxss xmm22, dword ptr [rdx - 512]
+// CHECK: encoding: [0x62,0xe1,0x7f,0x08,0x2e,0x72,0x80]
+          vucomxss xmm22, dword ptr [rdx - 512]
+
diff --git a/llvm/test/TableGen/x86-fold-tables.inc b/llvm/test/TableGen/x86-fold-tables.inc
index 286fb4904870c2..068bacd1901573 100644
--- a/llvm/test/TableGen/x86-fold-tables.inc
+++ b/llvm/test/TableGen/x86-fold-tables.inc
@@ -1178,6 +1178,9 @@ static const X86FoldTableEntry Table1[] = {
   {X86::VCOMISSrr_Int, X86::VCOMISSrm_Int, TB_NO_REVERSE},
   {X86::VCOMSBF16Zrr, X86::VCOMSBF16Zrm, 0},
   {X86::VCOMSBF16Zrr_Int, X86::VCOMSBF16Zrm_Int, TB_NO_REVERSE},
+  {X86::VCOMXSDZrr_Int, X86::VCOMXSDZrm_Int, TB_NO_REVERSE},
+  {X86::VCOMXSHZrr_Int, X86::VCOMXSHZrm_Int, TB_NO_REVERSE},
+  {X86::VCOMXSSZrr_Int, X86::VCOMXSSZrm_Int, TB_NO_REVERSE},
   {X86::VCVTDQ2PDYrr, X86::VCVTDQ2PDYrm, 0},
   {X86::VCVTDQ2PDZ128rr, X86::VCVTDQ2PDZ128rm, TB_NO_REVERSE},
   {X86::VCVTDQ2PDZ256rr, X86::VCVTDQ2PDZ256rm, 0},
@@ -1914,6 +1917,9 @@ static const X86FoldTableEntry Table1[] = {
   {X86::VUCOMISSZrr_Int, X86::VUCOMISSZrm_Int, TB_NO_REVERSE},
   {X86::VUCOMISSrr, X86::VUCOMISSrm, 0},
   {X86::VUCOMISSrr_Int, X86::VUCOMISSrm_Int, TB_NO_REVERSE},
+  {X86::VUCOMXSDZrr_Int, X86::VUCOMXSDZrm_Int, TB_NO_REVERSE},
+  {X86::VUCOMXSHZrr_Int, X86::VUCOMXSHZrm_Int, TB_NO_REVERSE},
+  {X86::VUCOMXSSZrr_Int, X86::VUCOMXSSZrm_Int, TB_NO_REVERSE},
   {X86::XOR16ri8_ND, X86::XOR16mi8_ND, 0},
   {X86::XOR16ri8_NF_ND, X86::XOR16mi8_NF_ND, 0},
   {X86::XOR16ri_ND, X86::XOR16mi_ND, 0},



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