diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/common/x64/emitter.h | 113 |
1 files changed, 54 insertions, 59 deletions
diff --git a/src/common/x64/emitter.h b/src/common/x64/emitter.h index 2dd0dc94e..7c6548fb5 100644 --- a/src/common/x64/emitter.h +++ b/src/common/x64/emitter.h @@ -157,45 +157,37 @@ class XEmitter; // RIP addressing does not benefit from micro op fusion on Core arch struct OpArg { - OpArg() {} // dummy op arg, used for storage - OpArg(u64 _offset, int _scale, X64Reg rmReg = RAX, X64Reg scaledReg = RAX) + friend class XEmitter; + + constexpr OpArg() = default; // dummy op arg, used for storage + 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 && - indexReg == b.indexReg && offset == b.offset; + return operandReg == b.operandReg && + 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 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 WriteFloatModRM(XEmitter *emit, FloatOp op); void WriteSingleByteOp(XEmitter *emit, u8 op, X64Reg operandReg, int bits); - // This one is public - must be written to - u64 offset; // use RIP-relative as much as possible - 64-bit immediates are not available. - u16 operandReg; - 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;} - bool IsSimpleReg(X64Reg reg) const - { - if (!IsSimpleReg()) - return false; - return GetSimpleReg() == reg; - } - bool CanDoOpWith(const OpArg &other) const + constexpr bool IsImm() const { return scale == SCALE_IMM8 || scale == SCALE_IMM16 || scale == SCALE_IMM32 || scale == SCALE_IMM64; } + constexpr bool IsSimpleReg() const { return scale == SCALE_NONE; } + constexpr bool IsSimpleReg(X64Reg reg) const { - if (IsSimpleReg()) return true; - if (!IsSimpleReg() && !other.IsSimpleReg() && !other.IsImm()) return false; - return true; + return IsSimpleReg() && GetSimpleReg() == reg; } int GetImmBits() const @@ -220,16 +212,15 @@ struct OpArg } } - X64Reg GetSimpleReg() const + constexpr X64Reg GetSimpleReg() const { - if (scale == SCALE_NONE) - return (X64Reg)offsetOrBaseReg; - else - return INVALID_REG; + return scale == SCALE_NONE + ? static_cast<X64Reg>(offsetOrBaseReg) + : INVALID_REG; } - u32 GetImmValue() const { - return (u32)offset; + constexpr u32 GetImmValue() const { + return static_cast<u32>(offset); } // For loops. @@ -238,56 +229,60 @@ struct OpArg } private: - u8 scale; - u16 offsetOrBaseReg; - u16 indexReg; + u8 scale = 0; + u16 offsetOrBaseReg = 0; + u16 indexReg = 0; + u64 offset = 0; // use RIP-relative as much as possible - 64-bit immediates are not available. + u16 operandReg = 0; }; -inline OpArg M(const void *ptr) {return OpArg((u64)ptr, (int)SCALE_RIP);} template <typename T> -inline OpArg M(const T *ptr) {return OpArg((u64)(const void *)ptr, (int)SCALE_RIP);} -inline OpArg R(X64Reg value) {return OpArg(0, SCALE_NONE, value);} -inline OpArg MatR(X64Reg value) {return OpArg(0, SCALE_ATREG, value);} +inline OpArg M(const T *ptr) { return OpArg(reinterpret_cast<u64>(ptr), static_cast<int>(SCALE_RIP)); } +constexpr OpArg R(X64Reg value) { return OpArg(0, SCALE_NONE, value); } +constexpr OpArg MatR(X64Reg value) { return OpArg(0, SCALE_ATREG, value); } -inline OpArg MDisp(X64Reg value, int offset) +constexpr OpArg MDisp(X64Reg value, int offset) { - return OpArg((u32)offset, SCALE_ATREG, value); + return OpArg(static_cast<u32>(offset), SCALE_ATREG, value); } -inline OpArg MComplex(X64Reg base, X64Reg scaled, int scale, int offset) +constexpr OpArg MComplex(X64Reg base, X64Reg scaled, int scale, int offset) { return OpArg(offset, scale, base, scaled); } -inline OpArg MScaled(X64Reg scaled, int scale, int offset) +constexpr OpArg MScaled(X64Reg scaled, int scale, int offset) { - if (scale == SCALE_1) - return OpArg(offset, SCALE_ATREG, scaled); - else - return OpArg(offset, scale | 0x20, RAX, scaled); + return scale == SCALE_1 + ? OpArg(offset, SCALE_ATREG, scaled) + : OpArg(offset, scale | 0x20, RAX, scaled); } -inline OpArg MRegSum(X64Reg base, X64Reg offset) +constexpr OpArg MRegSum(X64Reg base, X64Reg offset) { return MComplex(base, offset, 1, 0); } -inline OpArg Imm8 (u8 imm) {return OpArg(imm, SCALE_IMM8);} -inline OpArg Imm16(u16 imm) {return OpArg(imm, SCALE_IMM16);} //rarely used -inline OpArg Imm32(u32 imm) {return OpArg(imm, SCALE_IMM32);} -inline OpArg Imm64(u64 imm) {return OpArg(imm, SCALE_IMM64);} -inline OpArg UImmAuto(u32 imm) { +constexpr OpArg Imm8 (u8 imm) { return OpArg(imm, SCALE_IMM8); } +constexpr OpArg Imm16(u16 imm) { return OpArg(imm, SCALE_IMM16); } //rarely used +constexpr OpArg Imm32(u32 imm) { return OpArg(imm, SCALE_IMM32); } +constexpr OpArg Imm64(u64 imm) { return OpArg(imm, SCALE_IMM64); } +constexpr OpArg UImmAuto(u32 imm) { return OpArg(imm, imm >= 128 ? SCALE_IMM32 : SCALE_IMM8); } -inline OpArg SImmAuto(s32 imm) { +constexpr OpArg SImmAuto(s32 imm) { return OpArg(imm, (imm >= 128 || imm < -128) ? SCALE_IMM32 : SCALE_IMM8); } +template <typename T> +OpArg ImmPtr(const T* imm) +{ #ifdef _ARCH_64 -inline OpArg ImmPtr(const void* imm) {return Imm64((u64)imm);} + return Imm64(reinterpret_cast<u64>(imm)); #else -inline OpArg ImmPtr(const void* imm) {return Imm32((u32)imm);} + return Imm32(reinterpret_cast<u32>(imm)); #endif +} inline u32 PtrOffset(const void* ptr, const void* base) { |