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Code Issues Releases Activity

PreAllocator: Check if instruction supports a Vex prefix in IsVexSameOperandDestSrc1 (#3587)

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merry 2022-08-14 21:35:08 +01:00 committed by GitHub
parent e87e8b012c
commit 6dfb6ccf8c
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2 changed files with 10 additions and 1 deletions
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5
ARMeilleure/CodeGen/X86/AssemblerTable.cs
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@ -4,6 +4,11 @@ namespace ARMeilleure.CodeGen.X86
{
partial class Assembler
{
public static bool SupportsVexPrefix(X86Instruction inst)
{
return _instTable[(int)inst].Flags.HasFlag(InstructionFlags.Vex);
}
private const int BadOp = 0;
[Flags]

6
ARMeilleure/CodeGen/X86/PreAllocator.cs
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@ -1297,11 +1297,15 @@ namespace ARMeilleure.CodeGen.X86
{
if (IsIntrinsic(operation.Instruction))
{
IntrinsicInfo info = IntrinsicTable.GetInfo(operation.Intrinsic);
bool hasVex = HardwareCapabilities.SupportsVexEncoding && Assembler.SupportsVexPrefix(info.Inst);
bool isUnary = operation.SourcesCount < 2;
bool hasVecDest = operation.Destination != default && operation.Destination.Type == OperandType.V128;
return !HardwareCapabilities.SupportsVexEncoding && !isUnary && hasVecDest;
return !hasVex && !isUnary && hasVecDest;
}
return false;