suyu/dynarmic
26
1
Fork 1
Code Issues Pull requests Projects Releases Packages Wiki Activity

A64: Implement SHA1C

Browse source
This commit is contained in:
Lioncash 2018-04-15 00:05:40 -04:00 committed by MerryMage
parent 3c013bd9f8
commit da6627124b
2 changed files with 33 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
src/frontend/A64/decoder/a64.inc
View file

@ -322,7 +322,7 @@ INST(AESMC, "AESMC", "01001
INST(AESIMC, "AESIMC", "0100111000101000011110nnnnnddddd")
// Data Processing - FP and SIMD - SHA
//INST(SHA1C, "SHA1C", "01011110000mmmmm000000nnnnnddddd")
INST(SHA1C, "SHA1C", "01011110000mmmmm000000nnnnnddddd")
//INST(SHA1P, "SHA1P", "01011110000mmmmm000100nnnnnddddd")
//INST(SHA1M, "SHA1M", "01011110000mmmmm001000nnnnnddddd")
INST(SHA1SU0, "SHA1SU0", "01011110000mmmmm001100nnnnnddddd")

32
src/frontend/A64/translate/impl/simd_sha.cpp
View file

@ -7,6 +7,38 @@
#include "frontend/A64/translate/impl/impl.h"
namespace Dynarmic::A64 {
namespace {
IR::U32 SHAchoose(IREmitter& ir, IR::U32 x, IR::U32 y, IR::U32 z) {
return ir.Eor(ir.And(ir.Eor(y, z), x), z);
}
}
bool TranslatorVisitor::SHA1C(Vec Vm, Vec Vn, Vec Vd) {
IR::U128 x = ir.GetQ(Vd);
IR::U32 y = ir.VectorGetElement(32, ir.GetQ(Vn), 0);
const IR::U128 w = ir.GetQ(Vm);
for (size_t i = 0; i < 4; i++) {
const IR::U32 low_x = ir.VectorGetElement(32, x, 0);
const IR::U32 after_low_x = ir.VectorGetElement(32, x, 1);
const IR::U32 before_high_x = ir.VectorGetElement(32, x, 2);
const IR::U32 high_x = ir.VectorGetElement(32, x, 3);
const IR::U32 t = SHAchoose(ir, after_low_x, before_high_x, high_x);
const IR::U32 w_segment = ir.VectorGetElement(32, w, i);
y = ir.Add(ir.Add(ir.Add(y, ir.RotateRight(low_x, ir.Imm8(27))), t), w_segment);
x = ir.VectorSetElement(32, x, 1, ir.RotateRight(after_low_x, ir.Imm8(2)));
// Move each 32-bit element to the left once
// e.g. [3, 2, 1, 0], becomes [2, 1, 0, 3]
const IR::U128 shuffled_x = ir.VectorShuffleWords(x, 0b10010011);
x = ir.VectorSetElement(32, shuffled_x, 0, y);
y = high_x;
}
ir.SetQ(Vd, x);
return true;
}
bool TranslatorVisitor::SHA1SU0(Vec Vm, Vec Vn, Vec Vd) {
const IR::U128 d = ir.GetQ(Vd);