SwitchEmu/dynarmic
1
0
Fork 0
mirror of https://git.suyu.dev/suyu/dynarmic.git synced 2026-03-11 14:46:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

Implement thumb1_SUB_reg

Browse Source
This commit is contained in:
MerryMage
2016-07-08 18:49:30 +08:00
parent df0c324923
commit 92142d5a22
8 changed files with 59 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
src/backend_x64/emit_x64.cpp
View File

@@ -436,6 +436,37 @@ void EmitX64::EmitAddWithCarry(IR::Value* value_) {
}
}
void EmitX64::EmitSubWithCarry(IR::Value* value_) {
auto value = reinterpret_cast<IR::Inst*>(value_);
auto carry_inst = FindUseWithOpcode(value, IR::Opcode::GetCarryFromOp);
auto overflow_inst = FindUseWithOpcode(value, IR::Opcode::GetOverflowFromOp);
X64Reg addend = reg_alloc.UseRegister(value->GetArg(1).get());
X64Reg result = reg_alloc.UseDefRegister(value->GetArg(0).get(), value);
X64Reg carry = carry_inst
? reg_alloc.UseDefRegister(value->GetArg(2).get(), carry_inst)
: reg_alloc.UseRegister(value->GetArg(2).get());
X64Reg overflow = overflow_inst
? reg_alloc.DefRegister(overflow_inst)
: X64Reg::INVALID_REG;
// TODO: Consider using LEA.
// Note that x64 CF is inverse of what the ARM carry flag is here.
code->BT(32, R(carry), Imm8(0));
code->CMC();
code->SBB(32, R(result), R(addend));
if (carry_inst) {
inhibit_emission.insert(carry_inst);
code->SETcc(Gen::CC_NC, R(carry));
}
if (overflow_inst) {
inhibit_emission.insert(overflow_inst);
code->SETcc(Gen::CC_O, R(overflow));
}
}
void EmitX64::EmitAnd(IR::Value* value_) {
auto value = reinterpret_cast<IR::Inst*>(value_);