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A64: Implement compare and branch

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This commit is contained in:
MerryMage
2018-01-07 16:33:02 +00:00
parent e8bcf72ee5
commit cb481a3a48
20 changed files with 249 additions and 21 deletions
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15
src/backend_x64/a64_emit_x64.cpp
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@@ -115,6 +115,12 @@ A64EmitX64::BlockDescriptor A64EmitX64::Emit(IR::Block& block) {
return block_desc;
}
void A64EmitX64::EmitA64SetCheckBit(A64EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
Xbyak::Reg8 to_store = ctx.reg_alloc.UseGpr(args[0]).cvt8();
code->mov(code->byte[r15 + offsetof(A64JitState, check_bit)], to_store);
}
void A64EmitX64::EmitA64GetCFlag(A64EmitContext& ctx, IR::Inst* inst) {
Xbyak::Reg32 result = ctx.reg_alloc.ScratchGpr().cvt32();
code->mov(result, dword[r15 + offsetof(A64JitState, CPSR_nzcv)]);
@@ -267,6 +273,15 @@ void A64EmitX64::EmitTerminalImpl(IR::Term::If terminal, IR::LocationDescriptor
EmitTerminal(terminal.then_, initial_location);
}
void A64EmitX64::EmitTerminalImpl(IR::Term::CheckBit terminal, IR::LocationDescriptor initial_location) {
Xbyak::Label fail;
code->cmp(code->byte[r15 + offsetof(A64JitState, check_bit)], u8(0));
code->jz(fail);
EmitTerminal(terminal.then_, initial_location);
code->L(fail);
EmitTerminal(terminal.else_, initial_location);
}
void A64EmitX64::EmitTerminalImpl(IR::Term::CheckHalt terminal, IR::LocationDescriptor initial_location) {
code->cmp(code->byte[r15 + offsetof(A64JitState, halt_requested)], u8(0));
code->jne(code->GetForceReturnFromRunCodeAddress());