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jit_state: Hide cpsr implementation

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This commit is contained in:
MerryMage
2017-12-02 13:55:04 +00:00
parent a4e85ad565
commit 6adc554b53
8 changed files with 87 additions and 37 deletions
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29
src/backend_x64/emit_x64.cpp
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@@ -62,7 +62,7 @@ static Xbyak::Address MJitStateExtReg(Arm::ExtReg reg) {
static Xbyak::Address MJitStateCpsr() {
using namespace Xbyak::util;
return dword[r15 + offsetof(JitState, Cpsr)];
return dword[r15 + offsetof(JitState, CPSR)];
}
static void EraseInstruction(IR::Block& block, IR::Inst* inst) {
@@ -196,16 +196,25 @@ void EmitX64::EmitSetExtendedRegister64(RegAlloc& reg_alloc, IR::Block&, IR::Ins
code->movsd(MJitStateExtReg(reg), source);
}
static u32 GetCpsrImpl(JitState* jit_state) {
return jit_state->Cpsr();
}
void EmitX64::EmitGetCpsr(RegAlloc& reg_alloc, IR::Block&, IR::Inst* inst) {
Xbyak::Reg32 result = reg_alloc.ScratchGpr().cvt32();
code->mov(result, MJitStateCpsr());
reg_alloc.DefineValue(inst, result);
reg_alloc.HostCall(inst);
code->mov(code->ABI_PARAM1, code->r15);
code->CallFunction(&GetCpsrImpl);
}
static void SetCpsrImpl(u32 value, JitState* jit_state) {
jit_state->SetCpsr(value);
}
void EmitX64::EmitSetCpsr(RegAlloc& reg_alloc, IR::Block&, IR::Inst* inst) {
auto args = reg_alloc.GetArgumentInfo(inst);
Xbyak::Reg32 arg = reg_alloc.UseGpr(args[0]).cvt32();
code->mov(MJitStateCpsr(), arg);
reg_alloc.HostCall(nullptr, args[0]);
code->mov(code->ABI_PARAM2, code->r15);
code->CallFunction(&SetCpsrImpl);
}
void EmitX64::EmitGetNFlag(RegAlloc& reg_alloc, IR::Block&, IR::Inst* inst) {
@@ -404,9 +413,9 @@ void EmitX64::EmitBXWritePC(RegAlloc& reg_alloc, IR::Block&, IR::Inst* inst) {
} else {
using Xbyak::util::ptr;
Xbyak::Reg64 new_pc = reg_alloc.UseScratchGpr(arg);
Xbyak::Reg64 tmp1 = reg_alloc.ScratchGpr();
Xbyak::Reg64 tmp2 = reg_alloc.ScratchGpr();
Xbyak::Reg32 new_pc = reg_alloc.UseScratchGpr(arg).cvt32();
Xbyak::Reg32 tmp1 = reg_alloc.ScratchGpr().cvt32();
Xbyak::Reg32 tmp2 = reg_alloc.ScratchGpr().cvt32();
code->mov(tmp1, MJitStateCpsr());
code->mov(tmp2, tmp1);
@@ -415,7 +424,7 @@ void EmitX64::EmitBXWritePC(RegAlloc& reg_alloc, IR::Block&, IR::Inst* inst) {
code->test(new_pc, u32(1));
code->cmove(tmp1, tmp2); // CPSR.T = pc & 1
code->mov(MJitStateCpsr(), tmp1);
code->lea(tmp2, ptr[new_pc + new_pc * 1]);
code->lea(tmp2, ptr[new_pc.cvt64() + new_pc.cvt64() * 1]);
code->or_(tmp2, u32(0xFFFFFFFC)); // tmp2 = pc & 1 ? 0xFFFFFFFE : 0xFFFFFFFC
code->and_(new_pc, tmp2);
code->mov(MJitStateReg(Arm::Reg::PC), new_pc);