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Add Fast Paths for Crypto instructions (A32/A64) (#1026)

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* Add Fast Paths for Crypto instructions (A32/A64)

* Replace additional XOR with passing in const zero.
This commit is contained in:
riperiperi
2020-03-25 06:20:29 +00:00
committed by GitHub
parent a40d8d4a17
commit f695a215ad
7 changed files with 122 additions and 8 deletions
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54
ARMeilleure/Instructions/InstEmitSimdCrypto.cs
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@ -15,7 +15,17 @@ namespace ARMeilleure.Instructions
Operand d = GetVec(op.Rd);
Operand n = GetVec(op.Rn);
context.Copy(d, context.Call(new _V128_V128_V128(SoftFallback.Decrypt), d, n));
Operand res;
if (Optimizations.UseAesni)
{
res = context.AddIntrinsic(Intrinsic.X86Aesdeclast, context.AddIntrinsic(Intrinsic.X86Xorpd, d, n), context.VectorZero());
}
else
{
res = context.Call(new _V128_V128_V128(SoftFallback.Decrypt), d, n);
}
context.Copy(d, res);
}
public static void Aese_V(ArmEmitterContext context)
@ -25,7 +35,17 @@ namespace ARMeilleure.Instructions
Operand d = GetVec(op.Rd);
Operand n = GetVec(op.Rn);
context.Copy(d, context.Call(new _V128_V128_V128(SoftFallback.Encrypt), d, n));
Operand res;
if (Optimizations.UseAesni)
{
res = context.AddIntrinsic(Intrinsic.X86Aesenclast, context.AddIntrinsic(Intrinsic.X86Xorpd, d, n), context.VectorZero());
}
else
{
res = context.Call(new _V128_V128_V128(SoftFallback.Encrypt), d, n);
}
context.Copy(d, res);
}
public static void Aesimc_V(ArmEmitterContext context)
@ -34,7 +54,17 @@ namespace ARMeilleure.Instructions
Operand n = GetVec(op.Rn);
context.Copy(GetVec(op.Rd), context.Call(new _V128_V128(SoftFallback.InverseMixColumns), n));
Operand res;
if (Optimizations.UseAesni)
{
res = context.AddIntrinsic(Intrinsic.X86Aesimc, n);
}
else
{
res = context.Call(new _V128_V128(SoftFallback.InverseMixColumns), n);
}
context.Copy(GetVec(op.Rd), res);
}
public static void Aesmc_V(ArmEmitterContext context)
@ -43,7 +73,23 @@ namespace ARMeilleure.Instructions
Operand n = GetVec(op.Rn);
context.Copy(GetVec(op.Rd), context.Call(new _V128_V128(SoftFallback.MixColumns), n));
Operand res;
if (Optimizations.UseAesni)
{
Operand roundKey = context.VectorZero();
// Inverse Shift Rows, Inverse Sub Bytes, xor 0 so nothing happens
res = context.AddIntrinsic(Intrinsic.X86Aesdeclast, n, roundKey);
// Shift Rows, Sub Bytes, Mix Columns (!), xor 0 so nothing happens
res = context.AddIntrinsic(Intrinsic.X86Aesenc, res, roundKey);
}
else
{
res = context.Call(new _V128_V128(SoftFallback.MixColumns), n);
}
context.Copy(GetVec(op.Rd), res);
}
}
}