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A64: Implement SM4E

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Lioncash 2018-05-07 08:48:59 -04:00 committed by MerryMage
parent b312d28295
commit 3bde3347a5
2 changed files with 38 additions and 1 deletions
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2
src/frontend/A64/decoder/a64.inc
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@ -874,7 +874,7 @@ INST(SM3SS1, "SM3SS1", "11001
// Data Processing - FP and SIMD - SHA512 two register
INST(SHA512SU0, "SHA512SU0", "1100111011000000100000nnnnnddddd")
//INST(SM4E, "SM4E", "1100111011000000100001nnnnnddddd")
INST(SM4E, "SM4E", "1100111011000000100001nnnnnddddd")
// Data Processing - FP and SIMD - Conversion between floating point and fixed point
//INST(SCVTF_float_fix, "SCVTF (scalar, fixed-point)", "z0011110yy000010ppppppnnnnnddddd")

37
src/frontend/A64/translate/impl/simd_sha512.cpp
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@ -239,4 +239,41 @@ bool TranslatorVisitor::SM3PARTW2(Vec Vm, Vec Vn, Vec Vd) {
return true;
}
bool TranslatorVisitor::SM4E(Vec Vn, Vec Vd) {
const IR::U128 n = ir.GetQ(Vn);
IR::U128 roundresult = ir.GetQ(Vd);
for (size_t i = 0; i < 4; i++) {
const IR::U32 round_key = ir.VectorGetElement(32, n, i);
const IR::U32 upper_round = ir.VectorGetElement(32, roundresult, 3);
const IR::U32 before_upper_round = ir.VectorGetElement(32, roundresult, 2);
const IR::U32 after_lower_round = ir.VectorGetElement(32, roundresult, 1);
IR::U128 intval_vec = ir.ZeroExtendToQuad(ir.Eor(upper_round, ir.Eor(before_upper_round, ir.Eor(after_lower_round, round_key))));
for (size_t i = 0; i < 4; i++) {
const IR::U8 byte_element = ir.VectorGetElement(8, intval_vec, i);
intval_vec = ir.VectorSetElement(8, intval_vec, i, ir.SM4AccessSubstitutionBox(byte_element));
}
const IR::U32 intval = [&] {
const IR::U32 low_word = ir.VectorGetElement(32, intval_vec, 0);
const IR::U32 tmp1 = ir.RotateRight(low_word, ir.Imm8(30));
const IR::U32 tmp2 = ir.RotateRight(low_word, ir.Imm8(22));
const IR::U32 tmp3 = ir.RotateRight(low_word, ir.Imm8(14));
const IR::U32 tmp4 = ir.RotateRight(low_word, ir.Imm8(8));
const IR::U32 tmp5 = ir.Eor(low_word, ir.Eor(tmp1, ir.Eor(tmp2, ir.Eor(tmp3, tmp4))));
return ir.Eor(tmp5, ir.VectorGetElement(32, roundresult, 0));
}();
roundresult = ir.VectorShuffleWords(roundresult, 0b00111001);
roundresult = ir.VectorSetElement(32, roundresult, 3, intval);
}
ir.SetQ(Vd, roundresult);
return true;
}
} // namespace Dynarmic::A64