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

[Phoebe Wang via llvm-commits]

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@@ -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,
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phoebewang wrote:

Define `mayRaiseFPException=0` is not a problem, and we can leave pattern blank, see `avx512_ord_cmp_sae`

https://github.com/llvm/llvm-project/pull/108063