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A64: PSTATE access and tests

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This commit is contained in:
MerryMage 2018-01-07 14:46:35 +00:00
parent 23f3afe0b3
commit e8bcf72ee5
6 changed files with 86 additions and 2 deletions
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3
src/backend_x64/a64_emit_x64.cpp
View file

@ -128,7 +128,8 @@ void A64EmitX64::EmitA64SetNZCV(A64EmitContext& ctx, IR::Inst* inst) {
Xbyak::Reg32 to_store = ctx.reg_alloc.UseGpr(args[0]).cvt32();
code->and_(to_store, 0b11000001'00000001);
code->imul(to_store, to_store, 0b00010000'00100001);
code->and_(to_store, 0xFF000000);
code->shl(to_store, 16);
code->and_(to_store, 0xF0000000);
code->mov(dword[r15 + offsetof(A64JitState, CPSR_nzcv)], to_store);
}

16
src/backend_x64/a64_interface.cpp
View file

@ -125,6 +125,14 @@ public:
jit_state.SetFpcr(value);
}
u32 GetPstate() const {
return jit_state.GetPstate();
}
void SetPstate(u32 value) {
jit_state.SetPstate(value);
}
bool IsExecuting() const {
return is_executing;
}
@ -257,6 +265,14 @@ void Jit::SetFpcr(u32 value) {
impl->SetFpcr(value);
}
u32 Jit::GetPstate() const {
return impl->GetPstate();
}
void Jit::SetPstate(u32 value) {
impl->SetPstate(value);
}
bool Jit::IsExecuting() const {
return impl->IsExecuting();
}

6
src/backend_x64/a64_jitstate.h
View file

@ -33,6 +33,12 @@ struct A64JitState {
u32 CPSR_nzcv = 0;
u32 FPSCR_nzcv = 0;
u32 GetPstate() const {
return CPSR_nzcv;
}
void SetPstate(u32 new_pstate) {
CPSR_nzcv = new_pstate & 0xF0000000;
}
alignas(16) std::array<u64, 64> vec{}; // Extension registers.

3
src/frontend/ir/microinstruction.cpp
View file

@ -124,6 +124,7 @@ bool Inst::WritesToCPSR() const {
case Opcode::A32OrQFlag:
case Opcode::A32SetGEFlags:
case Opcode::A32SetGEFlagsCompressed:
case Opcode::A64SetNZCV:
return true;
default:
@ -387,7 +388,7 @@ void Inst::Use(const Value& value) {
break;
case Opcode::GetNZCVFromOp:
ASSERT_MSG(!value.GetInst()->nzcv_inst, "Only one of each type of pseudo-op allowed");
ASSERT_MSG(MayGetNZCVFromOp(), "This instruction doesn't support the GetNZCVFromOp pseduo-op");
ASSERT_MSG(value.GetInst()->MayGetNZCVFromOp(), "This value doesn't support the GetNZCVFromOp pseduo-op");
value.GetInst()->nzcv_inst = this;
break;
default: