mirrors/dynarmic
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

emit_x64_aes: AESNI implementations of all opcodes

Browse source
This commit is contained in:
MerryMage 2020-06-19 12:11:35 +01:00
parent 551e207661
commit 55c021fe82
1 changed files with 40 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

48
src/backend/x64/emit_x64_aes.cpp
View file

@ -17,8 +17,7 @@ namespace AES = Common::Crypto::AES;
using AESFn = void(AES::State&, const AES::State&);
static void EmitAESFunction(RegAlloc::ArgumentInfo args, EmitContext& ctx, BlockOfCode& code,
IR::Inst* inst, AESFn fn) {
static void EmitAESFunction(RegAlloc::ArgumentInfo args, EmitContext& ctx, BlockOfCode& code, IR::Inst* inst, AESFn fn) {
constexpr u32 stack_space = static_cast<u32>(sizeof(AES::State)) * 2;
const Xbyak::Xmm input = ctx.reg_alloc.UseXmm(args[0]);
const Xbyak::Xmm result = ctx.reg_alloc.ScratchXmm();
@ -26,16 +25,13 @@ static void EmitAESFunction(RegAlloc::ArgumentInfo args, EmitContext& ctx, Block
ctx.reg_alloc.HostCall(nullptr);
code.sub(rsp, stack_space + ABI_SHADOW_SPACE);
code.lea(code.ABI_PARAM1, ptr[rsp + ABI_SHADOW_SPACE]);
code.lea(code.ABI_PARAM2, ptr[rsp + ABI_SHADOW_SPACE + sizeof(AES::State)]);
code.movaps(xword[code.ABI_PARAM2], input);
code.CallFunction(fn);
code.movaps(result, xword[rsp + ABI_SHADOW_SPACE]);
// Free memory
code.add(rsp, stack_space + ABI_SHADOW_SPACE);
ctx.reg_alloc.DefineValue(inst, result);
@ -44,12 +40,34 @@ static void EmitAESFunction(RegAlloc::ArgumentInfo args, EmitContext& ctx, Block
void EmitX64::EmitAESDecryptSingleRound(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
if (code.HasAESNI()) {
const Xbyak::Xmm data = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm zero = ctx.reg_alloc.ScratchXmm();
code.pxor(zero, zero);
code.aesdeclast(data, zero);
ctx.reg_alloc.DefineValue(inst, data);
return;
}
EmitAESFunction(args, ctx, code, inst, AES::DecryptSingleRound);
}
void EmitX64::EmitAESEncryptSingleRound(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
if (code.HasAESNI()) {
const Xbyak::Xmm data = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm zero = ctx.reg_alloc.ScratchXmm();
code.pxor(zero, zero);
code.aesenclast(data, zero);
ctx.reg_alloc.DefineValue(inst, data);
return;
}
EmitAESFunction(args, ctx, code, inst, AES::EncryptSingleRound);
}
@ -62,13 +80,27 @@ void EmitX64::EmitAESInverseMixColumns(EmitContext& ctx, IR::Inst* inst) {
code.aesimc(data, data);
ctx.reg_alloc.DefineValue(inst, data);
} else {
EmitAESFunction(args, ctx, code, inst, AES::InverseMixColumns);
return;
}
EmitAESFunction(args, ctx, code, inst, AES::InverseMixColumns);
}
void EmitX64::EmitAESMixColumns(EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
if (code.HasAESNI()) {
const Xbyak::Xmm data = ctx.reg_alloc.UseScratchXmm(args[0]);
const Xbyak::Xmm zero = ctx.reg_alloc.ScratchXmm();
code.pxor(zero, zero);
code.aesdeclast(data, zero);
code.aesenc(data, zero);
ctx.reg_alloc.DefineValue(inst, data);
return;
}
EmitAESFunction(args, ctx, code, inst, AES::MixColumns);
}