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PreAllocator: Check if instruction supports a Vex prefix in IsVexSameOperandDestSrc1 (#3587)
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2 changed files with 10 additions and 1 deletions
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@ -4,6 +4,11 @@ namespace ARMeilleure.CodeGen.X86
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{
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{
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partial class Assembler
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partial class Assembler
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{
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{
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public static bool SupportsVexPrefix(X86Instruction inst)
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{
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return _instTable[(int)inst].Flags.HasFlag(InstructionFlags.Vex);
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}
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private const int BadOp = 0;
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private const int BadOp = 0;
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[Flags]
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[Flags]
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@ -1297,11 +1297,15 @@ namespace ARMeilleure.CodeGen.X86
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{
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{
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if (IsIntrinsic(operation.Instruction))
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if (IsIntrinsic(operation.Instruction))
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{
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{
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IntrinsicInfo info = IntrinsicTable.GetInfo(operation.Intrinsic);
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bool hasVex = HardwareCapabilities.SupportsVexEncoding && Assembler.SupportsVexPrefix(info.Inst);
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bool isUnary = operation.SourcesCount < 2;
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bool isUnary = operation.SourcesCount < 2;
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bool hasVecDest = operation.Destination != default && operation.Destination.Type == OperandType.V128;
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bool hasVecDest = operation.Destination != default && operation.Destination.Type == OperandType.V128;
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return !HardwareCapabilities.SupportsVexEncoding && !isUnary && hasVecDest;
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return !hasVex && !isUnary && hasVecDest;
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}
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}
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return false;
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return false;
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