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author | dotnet-bot <dotnet-bot@microsoft.com> | 2015-01-30 14:14:42 -0800 |
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committer | dotnet-bot <dotnet-bot@microsoft.com> | 2015-01-30 14:14:42 -0800 |
commit | ef1e2ab328087c61a6878c1e84f4fc5d710aebce (patch) | |
tree | dee1bbb89e9d722e16b0d1485e3cdd1b6c8e2cfa /src/jit/emitarm64.h | |
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Initial commit to populate CoreCLR repo
[tfs-changeset: 1407945]
Diffstat (limited to 'src/jit/emitarm64.h')
-rw-r--r-- | src/jit/emitarm64.h | 943 |
1 files changed, 943 insertions, 0 deletions
diff --git a/src/jit/emitarm64.h b/src/jit/emitarm64.h new file mode 100644 index 0000000000..defe9b87a3 --- /dev/null +++ b/src/jit/emitarm64.h @@ -0,0 +1,943 @@ +// +// Copyright (c) Microsoft. All rights reserved. +// Licensed under the MIT license. See LICENSE file in the project root for full license information. +// + + +#if defined(_TARGET_ARM64_) + +// The ARM64 instructions are all 32 bits in size. +// we use an unsigned int to hold the encoded instructions. +// This typedef defines the type that we use to hold encoded instructions. +// +typedef unsigned int code_t; + + + static bool strictArmAsm; + + /************************************************************************/ + /* Routines that compute the size of / encode instructions */ + /************************************************************************/ + + struct CnsVal + { + ssize_t cnsVal; +#ifdef RELOC_SUPPORT + bool cnsReloc; +#endif + }; + +#ifdef DEBUG + + /************************************************************************/ + /* Debug-only routines to display instructions */ + /************************************************************************/ + + const char * emitFPregName (unsigned reg, + bool varName = true); + const char * emitVectorRegName(regNumber reg); + + void emitDispInst (instruction ins); + void emitDispReloc (int value, bool addComma); + void emitDispImm (ssize_t imm, bool addComma, bool alwaysHex = false); + void emitDispFloatZero(); + void emitDispFloatImm(ssize_t imm8); + void emitDispImmOptsLSL12(ssize_t imm, insOpts opt); + void emitDispCond (insCond cond); + void emitDispFlags (insCflags flags); + void emitDispBarrier (insBarrier barrier); + void emitDispShiftOpts(insOpts opt); + void emitDispExtendOpts(insOpts opt); + void emitDispLSExtendOpts(insOpts opt); + void emitDispReg (regNumber reg, emitAttr attr, bool addComma); + void emitDispVectorReg (regNumber reg, insOpts opt, bool addComma); + void emitDispVectorRegIndex(regNumber reg, emitAttr elemsize, ssize_t index, bool addComma); + void emitDispArrangement(insOpts opt); + void emitDispShiftedReg(regNumber reg, insOpts opt, ssize_t imm, emitAttr attr); + void emitDispExtendReg(regNumber reg, insOpts opt, ssize_t imm); + void emitDispAddrRI (regNumber reg, insOpts opt, ssize_t imm); + void emitDispAddrRRExt(regNumber reg1, regNumber reg2, insOpts opt, bool isScaled, emitAttr size); + + void emitDispIns (instrDesc *id, bool isNew, bool doffs, bool asmfm, + unsigned offs = 0, BYTE * pCode = 0, size_t sz = 0, + insGroup *ig = NULL); +#endif // DEBUG + + /************************************************************************/ + /* Private members that deal with target-dependent instr. descriptors */ + /************************************************************************/ + +private: + + instrDesc *emitNewInstrAmd (emitAttr attr, int dsp); + instrDesc *emitNewInstrAmdCns (emitAttr attr, int dsp, int cns); + + instrDesc *emitNewInstrCallDir (int argCnt, + VARSET_VALARG_TP GCvars, + regMaskTP gcrefRegs, + regMaskTP byrefRegs, + emitAttr retSize); + + instrDesc *emitNewInstrCallInd( int argCnt, + ssize_t disp, + VARSET_VALARG_TP GCvars, + regMaskTP gcrefRegs, + regMaskTP byrefRegs, + emitAttr retSize); + + void emitGetInsCns (instrDesc *id, CnsVal *cv); + ssize_t emitGetInsAmdCns(instrDesc *id, CnsVal *cv); + void emitGetInsDcmCns(instrDesc *id, CnsVal *cv); + ssize_t emitGetInsAmdAny(instrDesc *id); + + /************************************************************************/ + /* Private helpers for instruction output */ + /************************************************************************/ + +private: + + bool emitInsIsCompare(instruction ins); + bool emitInsIsLoad (instruction ins); + bool emitInsIsStore (instruction ins); + bool emitInsIsLoadOrStore(instruction ins); + emitAttr emitInsTargetRegSize(instrDesc *id); + emitAttr emitInsLoadStoreSize(instrDesc *id); + + emitter::insFormat emitInsFormat(instruction ins); + + emitter::code_t emitInsCode(instruction ins, insFormat fmt); + + static unsigned emitOutput_Instr(BYTE *dst, code_t code); + + + // A helper method to return the natural scale for an EA 'size' + static unsigned NaturalScale_helper(emitAttr size); + + // A helper method to perform a Rotate-Right shift operation + static UINT64 ROR_helper(UINT64 value, unsigned sh, unsigned width); + + // A helper method to perform a 'NOT' bitwise complement operation + static UINT64 NOT_helper(UINT64 value, unsigned width); + + // A helper method to perform a bit Replicate operation + static UINT64 Replicate_helper(UINT64 value, unsigned width, emitAttr size); + + + /************************************************************************ + * + * This union is used to to encode/decode the special ARM64 immediate values + * that is listed as imm(N,r,s) and referred to as 'bitmask immediate' + */ + + union bitMaskImm + { + struct { + unsigned immS:6; // bits 0..5 + unsigned immR:6; // bits 6..11 + unsigned immN:1; // bits 12 + }; + unsigned immNRS; // concat N:R:S forming a 13-bit unsigned immediate + }; + + /************************************************************************ + * + * Convert between a 64-bit immediate and its 'bitmask immediate' + * representation imm(i16,hw) + */ + + static emitter::bitMaskImm emitEncodeBitMaskImm(INT64 imm, emitAttr size); + + static INT64 emitDecodeBitMaskImm(const emitter::bitMaskImm bmImm, + emitAttr size); + + + /************************************************************************ + * + * This union is used to to encode/decode the special ARM64 immediate values + * that is listed as imm(i16,hw) and referred to as 'halfword immediate' + */ + + union halfwordImm + { + struct { + unsigned immVal:16; // bits 0..15 + unsigned immHW:2; // bits 16..17 + }; + unsigned immHWVal; // concat HW:Val forming a 18-bit unsigned immediate + }; + + /************************************************************************ + * + * Convert between a 64-bit immediate and its 'halfword immediate' + * representation imm(i16,hw) + */ + + static emitter::halfwordImm emitEncodeHalfwordImm(INT64 imm, emitAttr size); + + static INT64 emitDecodeHalfwordImm(const emitter::halfwordImm hwImm, + emitAttr size); + + /************************************************************************ + * + * This union is used to encode/decode the special ARM64 immediate values + * that is listed as imm(i16,by) and referred to as 'byteShifted immediate' + */ + + union byteShiftedImm + { + struct { + unsigned immVal:8; // bits 0..7 + unsigned immBY:2; // bits 8..9 + unsigned immOnes:1; // bit 10 + }; + unsigned immBSVal; // concat Ones:BY:Val forming a 10-bit unsigned immediate + }; + + /************************************************************************ + * + * Convert between a 16/32-bit immediate and its 'byteShifted immediate' + * representation imm(i8,by) + */ + + static emitter::byteShiftedImm emitEncodeByteShiftedImm(INT64 imm, emitAttr size, bool allow_MSL); + + static INT32 emitDecodeByteShiftedImm(const emitter::byteShiftedImm bsImm, + emitAttr size); + + /************************************************************************ + * + * This union is used to to encode/decode the special ARM64 immediate values + * that are use for FMOV immediate and referred to as 'float 8-bit immediate' + */ + + union floatImm8 + { + struct { + unsigned immMant:4; // bits 0..3 + unsigned immExp:3; // bits 4..6 + unsigned immSign:1; // bits 7 + }; + unsigned immFPIVal; // concat Sign:Exp:Mant forming an 8-bit unsigned immediate + }; + + /************************************************************************ + * + * Convert between a double and its 'float 8-bit immediate' representation + */ + + static emitter::floatImm8 emitEncodeFloatImm8(double immDbl); + + static double emitDecodeFloatImm8(const emitter::floatImm8 fpImm); + + /************************************************************************ + * + * This union is used to to encode/decode the cond, nzcv and imm5 values for + * instructions that use them in the small constant immediate field + */ + + union condFlagsImm + { + struct { + insCond cond :4; // bits 0..3 + insCflags flags:4; // bits 4..7 + unsigned imm5 :5; // bits 8..12 + }; + unsigned immCFVal; // concat imm5:flags:cond forming an 13-bit unsigned immediate + }; + + // Returns an encoding for the specified register used in the 'Rd' position + static code_t insEncodeReg_Rd(regNumber reg); + + // Returns an encoding for the specified register used in the 'Rt' position + static code_t insEncodeReg_Rt(regNumber reg); + + // Returns an encoding for the specified register used in the 'Rn' position + static code_t insEncodeReg_Rn(regNumber reg); + + // Returns an encoding for the specified register used in the 'Rm' position + static code_t insEncodeReg_Rm(regNumber reg); + + // Returns an encoding for the specified register used in the 'Ra' position + static code_t insEncodeReg_Ra(regNumber reg); + + // Returns an encoding for the specified register used in the 'Vd' position + static code_t insEncodeReg_Vd(regNumber reg); + + // Returns an encoding for the specified register used in the 'Vt' position + static code_t insEncodeReg_Vt(regNumber reg); + + // Returns an encoding for the specified register used in the 'Vn' position + static code_t insEncodeReg_Vn(regNumber reg); + + // Returns an encoding for the specified register used in the 'Vm' position + static code_t insEncodeReg_Vm(regNumber reg); + + // Returns an encoding for the specified register used in the 'Va' position + static code_t insEncodeReg_Va(regNumber reg); + + // Returns an encoding for the imm which represents the condition code. + static code_t insEncodeCond(insCond cond); + + // Returns an encoding for the imm whioch represents the 'condition code' + // with the lowest bit inverted (marked by invert(<cond>) in the architecture manual. + static code_t insEncodeInvertedCond(insCond cond); + + // Returns an encoding for the imm which represents the flags. + static code_t insEncodeFlags(insCflags flags); + + // Returns the encoding for the Shift Count bits to be used for Arm64 encodings + static code_t insEncodeShiftCount(ssize_t imm, emitAttr size); + + // Returns the encoding to select the datasize for most Arm64 instructions + static code_t insEncodeDatasize(emitAttr size); + + // Returns the encoding to select the datasize for the general load/store Arm64 instructions + static code_t insEncodeDatasizeLS(code_t code, emitAttr size); + + // Returns the encoding to select the datasize for the vector load/store Arm64 instructions + static code_t insEncodeDatasizeVLS(code_t code, emitAttr size); + + // Returns the encoding to select the datasize for the vector load/store pair Arm64 instructions + static code_t insEncodeDatasizeVPLS(code_t code, emitAttr size); + + // Returns the encoding to select the datasize for bitfield Arm64 instructions + static code_t insEncodeDatasizeBF(code_t code, emitAttr size); + + // Returns the encoding to select the vectorsize for SIMD Arm64 instructions + static code_t insEncodeVectorsize(emitAttr size); + + // Returns the encoding to select 'index' for an Arm64 vector elem instruction + static code_t insEncodeVectorIndex(emitAttr elemsize, ssize_t index); + + // Returns the encoding to select 'index2' for an Arm64 'ins' elem instruction + static code_t insEncodeVectorIndex2(emitAttr elemsize, ssize_t index2); + + // Returns the encoding to select 'index' for an Arm64 'mul' elem instruction + static code_t insEncodeVectorIndexLMH(emitAttr elemsize, ssize_t index); + + // Returns the encoding to shift by 'shift' bits for an Arm64 vector or scalar instruction + static code_t insEncodeVectorShift(emitAttr size, ssize_t shift); + + // Returns the encoding to select the 1/2/4/8 byte elemsize for an Arm64 vector instruction + static code_t insEncodeElemsize(emitAttr size); + + // Returns the encoding to select the 4/8 byte elemsize for an Arm64 float vector instruction + static code_t insEncodeFloatElemsize(emitAttr size); + + // Returns the encoding to select the index for an Arm64 float vector by elem instruction + static code_t insEncodeFloatIndex(emitAttr elemsize, ssize_t index); + + // Returns the encoding to select the 'conversion' operation for a type 'fmt' Arm64 instruction + static code_t insEncodeConvertOpt(insFormat fmt, insOpts conversion); + + // Returns the encoding to have the Rn register of a ld/st reg be Pre/Post/Not indexed updated + static code_t insEncodeIndexedOpt(insOpts opt); + + // Returns the encoding to have the Rn register of a ld/st pair be Pre/Post/Not indexed updated + static code_t insEncodePairIndexedOpt(instruction ins, insOpts opt); + + // Returns the encoding to apply a Shift Type on the Rm register + static code_t insEncodeShiftType(insOpts opt); + + // Returns the encoding to apply a 12 bit left shift to the immediate + static code_t insEncodeShiftImm12(insOpts opt); + + // Returns the encoding to have the Rm register use an extend operation + static code_t insEncodeExtend(insOpts opt); + + // Returns the encoding to scale the Rm register by {0,1,2,3,4} in an extend operation + static code_t insEncodeExtendScale(ssize_t imm); + + // Returns the encoding to have the Rm register be auto scaled by the ld/st size + static code_t insEncodeReg3Scale(bool isScaled); + + // Returns true if 'reg' represents an integer register. + static bool isIntegerRegister (regNumber reg) + { return (reg >= REG_INT_FIRST) && (reg <= REG_INT_LAST); } + + // Returns true if 'value' is a legal unsigned immediate 8 bit encoding (such as for fMOV). + static bool isValidUimm8(ssize_t value) + { return (0 <= value) && (value <= 0xFFLL); }; + + // Returns true if 'value' is a legal unsigned immediate 12 bit encoding (such as for CMP, CMN). + static bool isValidUimm12(ssize_t value) + { return (0 <= value) && (value <= 0xFFFLL); }; + + // Returns true if 'value' is a legal unsigned immediate 16 bit encoding (such as for MOVZ, MOVN, MOVK). + static bool isValidUimm16(ssize_t value) + { return (0 <= value) && (value <= 0xFFFFLL); }; + + // Returns true if 'value' is a legal signed immediate 26 bit encoding (such as for B or BL). + static bool isValidSimm26(ssize_t value) + { return (-0x2000000LL <= value) && (value <= 0x1FFFFFFLL); }; + + // Returns true if 'value' is a legal signed immediate 19 bit encoding (such as for B.cond, CBNZ, CBZ). + static bool isValidSimm19(ssize_t value) + { return (-0x40000LL <= value) && (value <= 0x3FFFFLL); }; + + // Returns true if 'value' is a legal signed immediate 14 bit encoding (such as for TBNZ, TBZ). + static bool isValidSimm14(ssize_t value) + { return (-0x2000LL <= value) && (value <= 0x1FFFLL); }; + + // Returns true if 'value' represents a valid 'bitmask immediate' encoding. + static bool isValidImmNRS (size_t value, emitAttr size) + { return (value >= 0) && (value < 0x2000); } // any unsigned 13-bit immediate + + // Returns true if 'value' represents a valid 'halfword immediate' encoding. + static bool isValidImmHWVal (size_t value, emitAttr size) + { return (value >= 0) && (value < 0x40000); } // any unsigned 18-bit immediate + + // Returns true if 'value' represents a valid 'byteShifted immediate' encoding. + static bool isValidImmBSVal (size_t value, emitAttr size) + { return (value >= 0) && (value < 0x800); } // any unsigned 11-bit immediate + + // The return value replaces REG_ZR with REG_SP + static regNumber encodingZRtoSP(regNumber reg) + { return (reg == REG_ZR) ? REG_SP : reg; } // ZR (R31) encodes the SP register + + // The return value replaces REG_SP with REG_ZR + static regNumber encodingSPtoZR(regNumber reg) + { return (reg == REG_SP) ? REG_ZR : reg; } // SP is encoded using ZR (R31) + + // For the given 'ins' returns the reverse instruction, if one exists, otherwise returns INS_INVALID + static instruction insReverse(instruction ins); + + // For the given 'datasize' and 'elemsize' returns the insOpts that specifies the vector register arrangement + static insOpts optMakeArrangement(emitAttr datasize, emitAttr elemsize); + + // For the given 'datasize' and 'opt' returns true if it specifies a valid vector register arrangement + static bool isValidArrangement(emitAttr datasize, insOpts opt); + + // For the given 'arrangement' returns the 'datasize' specified by the vector register arrangement + static emitAttr optGetDatasize(insOpts arrangement); + + // For the given 'arrangement' returns the 'elemsize' specified by the vector register arrangement + static emitAttr optGetElemsize(insOpts arrangement); + + // For the given 'arrangement' returns the 'widen-arrangement' specified by the vector register arrangement + static insOpts optWidenElemsize(insOpts arrangement); + + // For the given 'conversion' returns the 'dstsize' specified by the conversion option + static emitAttr optGetDstsize(insOpts conversion); + + // For the given 'conversion' returns the 'srcsize' specified by the conversion option + static emitAttr optGetSrcsize(insOpts conversion); + + // For the given 'datasize', 'elemsize' and 'index' returns true, if it specifies a valid 'index' + // for an element of size 'elemsize' in a vector register of size 'datasize' + static bool isValidVectorIndex(emitAttr datasize, emitAttr elemsize, ssize_t index); + + /************************************************************************/ + /* Public inline informational methods */ + /************************************************************************/ + +public: + + // true if this 'imm' can be encoded as a input operand to a mov instruction + static bool emitIns_valid_imm_for_mov(INT64 imm, emitAttr size); + + // true if this 'imm' can be encoded as a input operand to a vector movi instruction + static bool emitIns_valid_imm_for_movi(INT64 imm, emitAttr size); + + // true if this 'immDbl' can be encoded as a input operand to a fmov instruction + static bool emitIns_valid_imm_for_fmov(double immDbl); + + // true if this 'imm' can be encoded as a input operand to an add instruction + static bool emitIns_valid_imm_for_add(INT64 imm, emitAttr size); + + // true if this 'imm' can be encoded as a input operand to a cmp instruction + static bool emitIns_valid_imm_for_cmp(INT64 imm, emitAttr size); + + // true if this 'imm' can be encoded as a input operand to an alu instruction + static bool emitIns_valid_imm_for_alu(INT64 imm, emitAttr size); + + // true if 'imm' can use the left shifted by 12 bits encoding + static bool canEncodeWithShiftImmBy12(INT64 imm); + + // Normalize the 'imm' so that the upper bits, as defined by 'size' are zero + static INT64 normalizeImm64(INT64 imm, emitAttr size); + + // Normalize the 'imm' so that the upper bits, as defined by 'size' are zero + static INT32 normalizeImm32(INT32 imm, emitAttr size); + + // true if 'imm' can be encoded using a 'bitmask immediate', also returns the encoding if wbBMI is non-null + static bool canEncodeBitMaskImm(INT64 imm, emitAttr size, + emitter::bitMaskImm* wbBMI = nullptr); + + // true if 'imm' can be encoded using a 'halfword immediate', also returns the encoding if wbHWI is non-null + static bool canEncodeHalfwordImm(INT64 imm, emitAttr size, + emitter::halfwordImm* wbHWI = nullptr); + + // true if 'imm' can be encoded using a 'byteShifted immediate', also returns the encoding if wbBSI is non-null + static bool canEncodeByteShiftedImm(INT64 imm, emitAttr size, bool allow_MSL, + emitter::byteShiftedImm* wbBSI = nullptr); + + // true if 'immDbl' can be encoded using a 'float immediate', also returns the encoding if wbFPI is non-null + static bool canEncodeFloatImm8(double immDbl, + emitter::floatImm8* wbFPI = nullptr); + + // Returns the number of bits used by the given 'size'. + inline static unsigned getBitWidth (emitAttr size) + { assert(size <= EA_8BYTE); return (unsigned)size * BITS_PER_BYTE; } + + // Returns true if the imm represents a valid bit shift or bit position for the given 'size' [0..31] or [0..63] + inline static unsigned isValidImmShift (ssize_t imm, emitAttr size) + { return (imm >= 0) && (imm < getBitWidth(size)); } + + inline static bool isValidGeneralDatasize (emitAttr size) + { return (size == EA_8BYTE) || (size == EA_4BYTE); } + + inline static bool isValidScalarDatasize (emitAttr size) + { return (size == EA_8BYTE) || (size == EA_4BYTE); } + + inline static bool isValidVectorDatasize (emitAttr size) + { return (size == EA_16BYTE) || (size == EA_8BYTE); } + + inline static bool isValidGeneralLSDatasize (emitAttr size) + { return (size == EA_8BYTE) || (size == EA_4BYTE) || + (size == EA_2BYTE) || (size == EA_1BYTE); } + + inline static bool isValidVectorLSDatasize (emitAttr size) + { return (size == EA_16BYTE) || + (size == EA_8BYTE) || (size == EA_4BYTE) || + (size == EA_2BYTE) || (size == EA_1BYTE); } + + inline static bool isValidVectorLSPDatasize (emitAttr size) + { return (size == EA_16BYTE) || + (size == EA_8BYTE) || (size == EA_4BYTE); } + + inline static bool isValidVectorElemsize (emitAttr size) + { return (size == EA_8BYTE) || (size == EA_4BYTE) || + (size == EA_2BYTE) || (size == EA_1BYTE); } + + inline static bool isValidVectorFcvtsize(emitAttr size) + { return (size == EA_8BYTE) || (size == EA_4BYTE) || + (size == EA_2BYTE); } + + inline static bool isValidVectorElemsizeFloat (emitAttr size) + { return (size == EA_8BYTE) || (size == EA_4BYTE); } + + inline static bool isGeneralRegister (regNumber reg) + { return (reg >= REG_INT_FIRST) && (reg <= REG_LR); } // Excludes REG_ZR + + inline static bool isGeneralRegisterOrZR (regNumber reg) + { return (reg >= REG_INT_FIRST) && (reg <= REG_ZR); } // Includes REG_ZR + + inline static bool isGeneralRegisterOrSP (regNumber reg) + { return isGeneralRegister(reg) || (reg == REG_SP); } // Includes REG_SP, Excludes REG_ZR + + inline static bool isVectorRegister (regNumber reg) + { return (reg >= REG_FP_FIRST && reg <= REG_FP_LAST); } + + inline static bool isFloatReg (regNumber reg) + { return isVectorRegister(reg); } + + inline static bool insOptsNone (insOpts opt) + { return (opt == INS_OPTS_NONE); } + + inline static bool insOptsIndexed (insOpts opt) + { return (opt == INS_OPTS_PRE_INDEX) || + (opt == INS_OPTS_POST_INDEX); } + + inline static bool insOptsPreIndex (insOpts opt) + { return (opt == INS_OPTS_PRE_INDEX); } + + inline static bool insOptsPostIndex (insOpts opt) + { return (opt == INS_OPTS_POST_INDEX); } + + inline static bool insOptsLSL12 (insOpts opt) // special 12-bit shift only used for imm12 + { return (opt == INS_OPTS_LSL12); } + + inline static bool insOptsAnyShift (insOpts opt) + { return ((opt >= INS_OPTS_LSL) && + (opt <= INS_OPTS_ROR) ); } + + inline static bool insOptsAluShift (insOpts opt) // excludes ROR + { return ((opt >= INS_OPTS_LSL) && + (opt <= INS_OPTS_ASR) ); } + + inline static bool insOptsVectorImmShift (insOpts opt) + { return ((opt == INS_OPTS_LSL) || + (opt == INS_OPTS_MSL) ); } + + inline static bool insOptsLSL (insOpts opt) + { return (opt == INS_OPTS_LSL); } + + inline static bool insOptsLSR (insOpts opt) + { return (opt == INS_OPTS_LSR); } + + inline static bool insOptsASR (insOpts opt) + { return (opt == INS_OPTS_ASR); } + + inline static bool insOptsROR (insOpts opt) + { return (opt == INS_OPTS_ROR); } + + inline static bool insOptsAnyExtend (insOpts opt) + { return ((opt >= INS_OPTS_UXTB) && + (opt <= INS_OPTS_SXTX) ); } + + inline static bool insOptsLSExtend (insOpts opt) + { return ((opt == INS_OPTS_NONE) || (opt == INS_OPTS_LSL) || + (opt == INS_OPTS_UXTW) || (opt == INS_OPTS_SXTW) || + (opt == INS_OPTS_UXTX) || (opt == INS_OPTS_SXTX) ); } + + inline static bool insOpts32BitExtend (insOpts opt) + { return ((opt == INS_OPTS_UXTW) || (opt == INS_OPTS_SXTW)); } + + inline static bool insOpts64BitExtend (insOpts opt) + { return ((opt == INS_OPTS_UXTX) || (opt == INS_OPTS_SXTX)); } + + inline static bool insOptsAnyArrangement(insOpts opt) + { return ((opt >= INS_OPTS_8B) && (opt <= INS_OPTS_2D)); } + + inline static bool insOptsConvertFloatToFloat (insOpts opt) + { return ((opt >= INS_OPTS_S_TO_D) && (opt <= INS_OPTS_D_TO_H)); } + + inline static bool insOptsConvertFloatToInt (insOpts opt) + { return ((opt >= INS_OPTS_S_TO_4BYTE) && (opt <= INS_OPTS_D_TO_8BYTE)); } + + inline static bool insOptsConvertIntToFloat (insOpts opt) + { return ((opt >= INS_OPTS_4BYTE_TO_S) && (opt <= INS_OPTS_8BYTE_TO_D)); } + + static bool isValidImmCond (ssize_t imm); + static bool isValidImmCondFlags (ssize_t imm); + static bool isValidImmCondFlagsImm5 (ssize_t imm); + + /************************************************************************/ + /* The public entry points to output instructions */ + /************************************************************************/ + +public: + + void emitIns (instruction ins); + + void emitIns_I (instruction ins, + emitAttr attr, + ssize_t imm); + + void emitIns_R (instruction ins, + emitAttr attr, + regNumber reg); + + void emitIns_R_I (instruction ins, + emitAttr attr, + regNumber reg, + ssize_t imm, + insOpts opt = INS_OPTS_NONE); + + void emitIns_R_F (instruction ins, + emitAttr attr, + regNumber reg, + double immDbl, + insOpts opt = INS_OPTS_NONE); + + void emitIns_R_R (instruction ins, + emitAttr attr, + regNumber reg1, + regNumber reg2, + insOpts opt = INS_OPTS_NONE); + + void emitIns_R_R (instruction ins, + emitAttr attr, + regNumber reg1, + regNumber reg2, + insFlags flags) + { + emitIns_R_R(ins,attr,reg1,reg2); + } + + void emitIns_R_I_I (instruction ins, + emitAttr attr, + regNumber reg1, + ssize_t imm1, + ssize_t imm2, + insOpts opt = INS_OPTS_NONE); + + void emitIns_R_R_I (instruction ins, + emitAttr attr, + regNumber reg1, + regNumber reg2, + ssize_t imm, + insOpts opt = INS_OPTS_NONE); + + void emitIns_R_R_R (instruction ins, + emitAttr attr, + regNumber reg1, + regNumber reg2, + regNumber reg3, + insOpts opt = INS_OPTS_NONE); + + void emitIns_R_R_R_I(instruction ins, + emitAttr attr, + regNumber reg1, + regNumber reg2, + regNumber reg3, + ssize_t imm, + insOpts opt = INS_OPTS_NONE); + + void emitIns_R_R_R_Ext(instruction ins, + emitAttr attr, + regNumber reg1, + regNumber reg2, + regNumber reg3, + insOpts opt = INS_OPTS_NONE, + int shiftAmount = -1); + + void emitIns_R_R_I_I(instruction ins, + emitAttr attr, + regNumber reg1, + regNumber reg2, + int imm1, + int imm2); + + void emitIns_R_R_R_R(instruction ins, + emitAttr attr, + regNumber reg1, + regNumber reg2, + regNumber reg3, + regNumber reg4); + + void emitIns_R_COND (instruction ins, + emitAttr attr, + regNumber reg, + insCond cond); + + void emitIns_R_R_COND (instruction ins, + emitAttr attr, + regNumber reg1, + regNumber reg2, + insCond cond); + + void emitIns_R_R_R_COND (instruction ins, + emitAttr attr, + regNumber reg1, + regNumber reg2, + regNumber reg3, + insCond cond); + + void emitIns_R_R_FLAGS_COND (instruction ins, + emitAttr attr, + regNumber reg1, + regNumber reg2, + insCflags flags, + insCond cond); + + void emitIns_R_I_FLAGS_COND (instruction ins, + emitAttr attr, + regNumber reg1, + int imm, + insCflags flags, + insCond cond); + + void emitIns_BARR (instruction ins, + insBarrier barrier); + + void emitIns_C (instruction ins, + emitAttr attr, + CORINFO_FIELD_HANDLE fdlHnd, + int offs); + + void emitIns_S (instruction ins, + emitAttr attr, + int varx, + int offs); + + void emitIns_S_R (instruction ins, + emitAttr attr, + regNumber ireg, + int varx, + int offs); + + void emitIns_R_S (instruction ins, + emitAttr attr, + regNumber ireg, + int varx, + int offs); + + void emitIns_S_I (instruction ins, + emitAttr attr, + int varx, + int offs, + int val); + + void emitIns_R_C (instruction ins, + emitAttr attr, + regNumber reg, + CORINFO_FIELD_HANDLE fldHnd, + int offs); + + void emitIns_C_R (instruction ins, + emitAttr attr, + CORINFO_FIELD_HANDLE fldHnd, + regNumber reg, + int offs); + + void emitIns_C_I (instruction ins, + emitAttr attr, + CORINFO_FIELD_HANDLE fdlHnd, + ssize_t offs, + ssize_t val); + + void emitIns_R_L (instruction ins, + emitAttr attr, + BasicBlock * dst, + regNumber reg); + + void emitIns_R_D (instruction ins, + emitAttr attr, + unsigned offs, + regNumber reg); + + void emitIns_J_R (instruction ins, + emitAttr attr, + BasicBlock *dst, + regNumber reg); + + void emitIns_I_AR (instruction ins, + emitAttr attr, + int val, + regNumber reg, + int offs, + int memCookie = 0, + void * clsCookie = NULL); + + void emitIns_R_AR (instruction ins, + emitAttr attr, + regNumber ireg, + regNumber reg, + int offs, + int memCookie = 0, + void * clsCookie = NULL); + + void emitIns_R_AI (instruction ins, + emitAttr attr, + regNumber ireg, + ssize_t disp); + + void emitIns_AR_R (instruction ins, + emitAttr attr, + regNumber ireg, + regNumber reg, + int offs, + int memCookie = 0, + void * clsCookie = NULL); + + void emitIns_R_ARR (instruction ins, + emitAttr attr, + regNumber ireg, + regNumber reg, + regNumber rg2, + int disp); + + void emitIns_ARR_R (instruction ins, + emitAttr attr, + regNumber ireg, + regNumber reg, + regNumber rg2, + int disp); + + void emitIns_R_ARX (instruction ins, + emitAttr attr, + regNumber ireg, + regNumber reg, + regNumber rg2, + unsigned mul, + int disp); + + enum EmitCallType + { + + // I have included here, but commented out, all the values used by the x86 emitter. + // However, ARM has a much reduced instruction set, and so the ARM emitter only + // supports a subset of the x86 variants. By leaving them commented out, it becomes + // a compile time error if code tries to use them (and hopefully see this comment + // and know why they are unavailible on ARM), while making it easier to stay + // in-sync with x86 and possibly add them back in if needed. + + EC_FUNC_TOKEN, // Direct call to a helper/static/nonvirtual/global method + // EC_FUNC_TOKEN_INDIR, // Indirect call to a helper/static/nonvirtual/global method + EC_FUNC_ADDR, // Direct call to an absolute address + + // EC_FUNC_VIRTUAL, // Call to a virtual method (using the vtable) + EC_INDIR_R, // Indirect call via register + // EC_INDIR_SR, // Indirect call via stack-reference (local var) + // EC_INDIR_C, // Indirect call via static class var + // EC_INDIR_ARD, // Indirect call via an addressing mode + + EC_COUNT + }; + + void emitIns_Call (EmitCallType callType, + CORINFO_METHOD_HANDLE methHnd, + INDEBUG_LDISASM_COMMA(CORINFO_SIG_INFO* sigInfo) // used to report call sites to the EE + void* addr, + ssize_t argSize, + emitAttr retSize, + VARSET_VALARG_TP ptrVars, + regMaskTP gcrefRegs, + regMaskTP byrefRegs, + IL_OFFSETX ilOffset = BAD_IL_OFFSET, + regNumber ireg = REG_NA, + regNumber xreg = REG_NA, + unsigned xmul = 0, + ssize_t disp = 0, + bool isJump = false, + bool isNoGC = false, + bool isProfLeaveCB = false); + + BYTE* emitOutputLJ (insGroup *ig, BYTE *dst, instrDesc *i); + unsigned emitOutputCall(insGroup *ig, BYTE *dst, instrDesc *i, code_t code); + +/***************************************************************************** + * + * Given an instrDesc, return true if it's a conditional jump. + */ + +inline bool emitIsCondJump(instrDesc *jmp) +{ + return (jmp->idInsFmt() == IF_BI_0B); +} + + +/***************************************************************************** + * + * Given an instrDesc, return true if it's a compare and jump. + */ + +inline bool emitIsCmpJump(instrDesc *jmp) +{ + return ((jmp->idInsFmt() == IF_BI_1A) || + (jmp->idInsFmt() == IF_BI_1B)); +} + +/***************************************************************************** + * + * Given a instrDesc, return true if it's an unconditional jump. + */ + +inline bool emitIsUncondJump(instrDesc *jmp) +{ + return (jmp->idInsFmt() == IF_BI_0A); +} + +/***************************************************************************** + * + * Given a instrDesc, return true if it's a direct call. + */ + +inline bool emitIsDirectCall(instrDesc *call) +{ + return (call->idInsFmt() == IF_BI_0C); +} + +/***************************************************************************** + * + * Given a instrDesc, return true if it's a load label instruction. + */ + +inline bool emitIsLoadLabel(instrDesc *jmp) +{ + return (jmp->idInsFmt() == IF_DI_1E); // adr or adrp +} + +#endif // _TARGET_ARM64_ |