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emitter: constexpr-ify OpArg

This commit is contained in:
Lioncash 2016-03-09 02:30:13 -05:00
parent 77bcdafc94
commit 6085b419e5
1 changed files with 30 additions and 30 deletions
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60
src/common/x64/emitter.h
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@ -159,34 +159,35 @@ struct OpArg
{ {
friend class XEmitter; friend class XEmitter;
OpArg() {} // dummy op arg, used for storage constexpr OpArg() = default; // dummy op arg, used for storage
OpArg(u64 _offset, int _scale, X64Reg rmReg = RAX, X64Reg scaledReg = RAX) constexpr OpArg(u64 offset_, int scale_, X64Reg rmReg = RAX, X64Reg scaledReg = RAX)
: scale(static_cast<u8>(scale_))
, offsetOrBaseReg(static_cast<u16>(rmReg))
, indexReg(static_cast<u16>(scaledReg))
, offset(offset_)
{ {
operandReg = 0;
scale = (u8)_scale;
offsetOrBaseReg = (u16)rmReg;
indexReg = (u16)scaledReg;
//if scale == 0 never mind offsetting
offset = _offset;
} }
bool operator==(const OpArg &b) const
constexpr bool operator==(const OpArg &b) const
{ {
return operandReg == b.operandReg && scale == b.scale && offsetOrBaseReg == b.offsetOrBaseReg && return operandReg == b.operandReg &&
indexReg == b.indexReg && offset == b.offset; scale == b.scale &&
offsetOrBaseReg == b.offsetOrBaseReg &&
indexReg == b.indexReg &&
offset == b.offset;
} }
void WriteRex(XEmitter *emit, int opBits, int bits, int customOp = -1) const; void WriteRex(XEmitter *emit, int opBits, int bits, int customOp = -1) const;
void WriteVex(XEmitter* emit, X64Reg regOp1, X64Reg regOp2, int L, int pp, int mmmmm, int W = 0) const; void WriteVex(XEmitter* emit, X64Reg regOp1, X64Reg regOp2, int L, int pp, int mmmmm, int W = 0) const;
void WriteRest(XEmitter *emit, int extraBytes=0, X64Reg operandReg=INVALID_REG, bool warn_64bit_offset = true) const; void WriteRest(XEmitter *emit, int extraBytes=0, X64Reg operandReg=INVALID_REG, bool warn_64bit_offset = true) const;
void WriteSingleByteOp(XEmitter *emit, u8 op, X64Reg operandReg, int bits); void WriteSingleByteOp(XEmitter *emit, u8 op, X64Reg operandReg, int bits);
void WriteNormalOp(XEmitter *emit, bool toRM, NormalOp op, const OpArg &operand, int bits) const; void WriteNormalOp(XEmitter *emit, bool toRM, NormalOp op, const OpArg &operand, int bits) const;
bool IsImm() const {return scale == SCALE_IMM8 || scale == SCALE_IMM16 || scale == SCALE_IMM32 || scale == SCALE_IMM64;}
bool IsSimpleReg() const {return scale == SCALE_NONE;} constexpr bool IsImm() const { return scale == SCALE_IMM8 || scale == SCALE_IMM16 || scale == SCALE_IMM32 || scale == SCALE_IMM64; }
bool IsSimpleReg(X64Reg reg) const constexpr bool IsSimpleReg() const { return scale == SCALE_NONE; }
constexpr bool IsSimpleReg(X64Reg reg) const
{ {
if (!IsSimpleReg()) return IsSimpleReg() && GetSimpleReg() == reg;
return false;
return GetSimpleReg() == reg;
} }
bool CanDoOpWith(const OpArg &other) const bool CanDoOpWith(const OpArg &other) const
@ -218,16 +219,15 @@ struct OpArg
} }
} }
X64Reg GetSimpleReg() const constexpr X64Reg GetSimpleReg() const
{ {
if (scale == SCALE_NONE) return scale == SCALE_NONE
return (X64Reg)offsetOrBaseReg; ? static_cast<X64Reg>(offsetOrBaseReg)
else : INVALID_REG;
return INVALID_REG;
} }
u32 GetImmValue() const { constexpr u32 GetImmValue() const {
return (u32)offset; return static_cast<u32>(offset);
} }
// For loops. // For loops.
@ -236,11 +236,11 @@ struct OpArg
} }
private: private:
u8 scale; u8 scale = 0;
u16 offsetOrBaseReg; u16 offsetOrBaseReg = 0;
u16 indexReg; u16 indexReg = 0;
u64 offset; // use RIP-relative as much as possible - 64-bit immediates are not available. u64 offset = 0; // use RIP-relative as much as possible - 64-bit immediates are not available.
u16 operandReg; u16 operandReg = 0;
}; };
inline OpArg M(const void *ptr) {return OpArg((u64)ptr, (int)SCALE_RIP);} inline OpArg M(const void *ptr) {return OpArg((u64)ptr, (int)SCALE_RIP);}