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emit_x64: bug: OP m/r64, imm32 form instructions sign-extend their immediate on x64

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This commit is contained in:
MerryMage 2018-01-13 17:59:50 +00:00
parent 989d036e65
commit e4615a4562
4 changed files with 29 additions and 8 deletions
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4
src/backend_x64/a64_emit_x64.cpp
View file

@ -180,8 +180,8 @@ void A64EmitX64::EmitA64SetX(A64EmitContext& ctx, IR::Inst* inst) {
auto args = ctx.reg_alloc.GetArgumentInfo(inst);
A64::Reg reg = inst->GetArg(0).GetA64RegRef();
auto addr = qword[r15 + offsetof(A64JitState, reg) + sizeof(u64) * static_cast<size_t>(reg)];
if (args[1].FitsInImmediateU32()) {
code->mov(addr, args[1].GetImmediateU32());
if (args[1].FitsInImmediateS32()) {
code->mov(addr, args[1].GetImmediateS32());
} else if (args[1].IsInXmm()) {
Xbyak::Xmm to_store = ctx.reg_alloc.UseXmm(args[1]);
code->movq(addr, to_store);

12
src/backend_x64/emit_x64.cpp
View file

@ -993,8 +993,8 @@ void EmitX64<JST>::EmitAnd64(EmitContext& ctx, IR::Inst* inst) {
Xbyak::Reg64 result = ctx.reg_alloc.UseScratchGpr(args[0]);
if (args[1].FitsInImmediateU32()) {
u32 op_arg = args[1].GetImmediateU32();
if (args[1].FitsInImmediateS32()) {
u32 op_arg = u32(args[1].GetImmediateS32());
code->and_(result, op_arg);
} else {
@ -1033,8 +1033,8 @@ void EmitX64<JST>::EmitEor64(EmitContext& ctx, IR::Inst* inst) {
Xbyak::Reg64 result = ctx.reg_alloc.UseScratchGpr(args[0]);
if (args[1].FitsInImmediateU32()) {
u32 op_arg = args[1].GetImmediateU32();
if (args[1].FitsInImmediateS32()) {
u32 op_arg = u32(args[1].GetImmediateS32());
code->xor_(result, op_arg);
} else {
@ -1073,8 +1073,8 @@ void EmitX64<JST>::EmitOr64(EmitContext& ctx, IR::Inst* inst) {
Xbyak::Reg64 result = ctx.reg_alloc.UseScratchGpr(args[0]);
if (args[1].FitsInImmediateU32()) {
u32 op_arg = args[1].GetImmediateU32();
if (args[1].FitsInImmediateS32()) {
u32 op_arg = u32(args[1].GetImmediateS32());
code->or_(result, op_arg);
} else {

19
src/backend_x64/reg_alloc.cpp
View file

@ -107,6 +107,13 @@ bool Argument::FitsInImmediateU32() const {
return imm < 0x100000000;
}
bool Argument::FitsInImmediateS32() const {
if (!IsImmediate())
return false;
s64 imm = static_cast<s64>(ImmediateToU64(value));
return -s64(0x80000000) <= imm && imm <= s64(0x7FFFFFFF);
}
bool Argument::GetImmediateU1() const {
return value.GetU1();
}
@ -129,19 +136,31 @@ u32 Argument::GetImmediateU32() const {
return u32(imm);
}
u64 Argument::GetImmediateS32() const {
ASSERT(FitsInImmediateS32());
u64 imm = ImmediateToU64(value);
return imm;
}
u64 Argument::GetImmediateU64() const {
return ImmediateToU64(value);
}
bool Argument::IsInGpr() const {
if (IsImmediate())
return false;
return HostLocIsGPR(*reg_alloc.ValueLocation(value.GetInst()));
}
bool Argument::IsInXmm() const {
if (IsImmediate())
return false;
return HostLocIsXMM(*reg_alloc.ValueLocation(value.GetInst()));
}
bool Argument::IsInMemory() const {
if (IsImmediate())
return false;
return HostLocIsSpill(*reg_alloc.ValueLocation(value.GetInst()));
}

2
src/backend_x64/reg_alloc.h
View file

@ -57,11 +57,13 @@ public:
bool IsImmediate() const;
bool FitsInImmediateU32() const;
bool FitsInImmediateS32() const;
bool GetImmediateU1() const;
u8 GetImmediateU8() const;
u16 GetImmediateU16() const;
u32 GetImmediateU32() const;
u64 GetImmediateS32() const;
u64 GetImmediateU64() const;
/// Is this value currently in a GPR?