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A64: Implement CLS

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This is not the cleanest implementation.
This commit is contained in:
MerryMage
2018-01-23 18:22:42 +00:00
parent b8e26bfdc3
commit d4b05b28cf
2 changed files with 11 additions and 1 deletions
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10
src/frontend/A64/translate/impl/data_processing_register.cpp
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@@ -19,6 +19,16 @@ bool TranslatorVisitor::CLZ_int(bool sf, Reg Rn, Reg Rd) {
return true;
}
bool TranslatorVisitor::CLS_int(bool sf, Reg Rn, Reg Rd) {
const size_t datasize = sf ? 64 : 32;
const IR::U32U64 operand = X(datasize, Rn);
const IR::U32U64 result = ir.Sub(ir.CountLeadingZeros(ir.Eor(operand, ir.ArithmeticShiftRight(operand, ir.Imm8(u8(datasize))))), I(datasize, 1));
X(datasize, Rd, result);
return true;
}
bool TranslatorVisitor::REV(bool sf, bool opc_0, Reg Rn, Reg Rd) {
const size_t datasize = sf ? 64 : 32;