[llvm] [X86][MC] Support encoding/decoding for APX CCMP/CTEST (PR #83863)

[Phoebe Wang via llvm-commits]

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@@ -1141,6 +1141,15 @@ static int getInstructionIDWithAttrMask(uint16_t *instructionID,
   return 0;
 }
 
+static bool isCCMPOrCTEST(InternalInstruction *insn) {
+  return (insn->opcodeType == MAP4) &&
+         (((insn->opcode & 0xfe) == 0x38) || ((insn->opcode & 0xfe) == 0x3a) ||
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phoebewang wrote:

Add a variable for `insn->opcode & 0xf`

https://github.com/llvm/llvm-project/pull/83863