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A64: Implement CRC32

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Lioncash 2018-01-28 01:41:58 -05:00 • committed by MerryMage
parent 01b4395bf8
commit af1384d700
6 changed files with 161 additions and 7 deletions
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33
src/frontend/A64/translate/impl/data_processing_crc32.cpp
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@ -8,6 +8,39 @@
namespace Dynarmic::A64 {
bool TranslatorVisitor::CRC32(bool sf, Reg Rm, Imm<2> sz, Reg Rn, Reg Rd) {
const u32 integral_size = sz.ZeroExtend();
if (sf && integral_size != 0b11) {
return UnallocatedEncoding();
}
if (!sf && integral_size == 0b11) {
return UnallocatedEncoding();
}
const IR::U32 result = [&] {
const size_t datasize = sf ? 64 : 32;
const IR::U32 accumulator = ir.GetW(Rn);
const IR::U32U64 data = X(datasize, Rm);
switch (integral_size) {
case 0b00:
return ir.CRC32ISO8(accumulator, data);
case 0b01:
return ir.CRC32ISO16(accumulator, data);
case 0b10:
return ir.CRC32ISO32(accumulator, data);
case 0b11:
default:
return ir.CRC32ISO64(accumulator, data);
}
}();
X(32, Rd, result);
return true;
}
bool TranslatorVisitor::CRC32C(bool sf, Reg Rm, Imm<2> sz, Reg Rn, Reg Rd) {
const u32 integral_size = sz.ZeroExtend();