1 // Licensed to the .NET Foundation under one or more agreements.
2 // The .NET Foundation licenses this file to you under the MIT license.
3 // See the LICENSE file in the project root for more information.
5 #if defined(_TARGET_ARM64_)
7 // The ARM64 instructions are all 32 bits in size.
8 // we use an unsigned int to hold the encoded instructions.
9 // This typedef defines the type that we use to hold encoded instructions.
11 typedef unsigned int code_t;
13 static bool strictArmAsm;
15 /************************************************************************/
16 /* Routines that compute the size of / encode instructions */
17 /************************************************************************/
27 /************************************************************************/
28 /* Debug-only routines to display instructions */
29 /************************************************************************/
31 const char* emitFPregName(unsigned reg, bool varName = true);
32 const char* emitVectorRegName(regNumber reg);
34 void emitDispInst(instruction ins);
35 void emitDispReloc(int value, bool addComma);
36 void emitDispImm(ssize_t imm, bool addComma, bool alwaysHex = false);
37 void emitDispFloatZero();
38 void emitDispFloatImm(ssize_t imm8);
39 void emitDispImmOptsLSL12(ssize_t imm, insOpts opt);
40 void emitDispCond(insCond cond);
41 void emitDispFlags(insCflags flags);
42 void emitDispBarrier(insBarrier barrier);
43 void emitDispShiftOpts(insOpts opt);
44 void emitDispExtendOpts(insOpts opt);
45 void emitDispLSExtendOpts(insOpts opt);
46 void emitDispReg(regNumber reg, emitAttr attr, bool addComma);
47 void emitDispVectorReg(regNumber reg, insOpts opt, bool addComma);
48 void emitDispVectorRegIndex(regNumber reg, emitAttr elemsize, ssize_t index, bool addComma);
49 void emitDispArrangement(insOpts opt);
50 void emitDispShiftedReg(regNumber reg, insOpts opt, ssize_t imm, emitAttr attr);
51 void emitDispExtendReg(regNumber reg, insOpts opt, ssize_t imm);
52 void emitDispAddrRI(regNumber reg, insOpts opt, ssize_t imm);
53 void emitDispAddrRRExt(regNumber reg1, regNumber reg2, insOpts opt, bool isScaled, emitAttr size);
55 void emitDispIns(instrDesc* id,
65 /************************************************************************/
66 /* Private members that deal with target-dependent instr. descriptors */
67 /************************************************************************/
70 instrDesc* emitNewInstrAmd(emitAttr attr, int dsp);
71 instrDesc* emitNewInstrAmdCns(emitAttr attr, int dsp, int cns);
73 instrDesc* emitNewInstrCallDir(int argCnt,
74 VARSET_VALARG_TP GCvars,
78 emitAttr secondRetSize);
80 instrDesc* emitNewInstrCallInd(int argCnt,
82 VARSET_VALARG_TP GCvars,
86 emitAttr secondRetSize);
88 void emitGetInsCns(instrDesc* id, CnsVal* cv);
89 ssize_t emitGetInsAmdCns(instrDesc* id, CnsVal* cv);
90 void emitGetInsDcmCns(instrDesc* id, CnsVal* cv);
91 ssize_t emitGetInsAmdAny(instrDesc* id);
93 /************************************************************************/
94 /* Private helpers for instruction output */
95 /************************************************************************/
98 bool emitInsIsCompare(instruction ins);
99 bool emitInsIsLoad(instruction ins);
100 bool emitInsIsStore(instruction ins);
101 bool emitInsIsLoadOrStore(instruction ins);
102 emitAttr emitInsAdjustLoadStoreAttr(instruction ins, emitAttr attr);
103 emitAttr emitInsTargetRegSize(instrDesc* id);
104 emitAttr emitInsLoadStoreSize(instrDesc* id);
106 emitter::insFormat emitInsFormat(instruction ins);
107 emitter::code_t emitInsCode(instruction ins, insFormat fmt);
109 // Generate code for a load or store operation and handle the case of contained GT_LEA op1 with [base + index<<scale +
111 void emitInsLoadStoreOp(instruction ins, emitAttr attr, regNumber dataReg, GenTreeIndir* indir);
113 // Emit the 32-bit Arm64 instruction 'code' into the 'dst' buffer
114 static unsigned emitOutput_Instr(BYTE* dst, code_t code);
116 // A helper method to return the natural scale for an EA 'size'
117 static unsigned NaturalScale_helper(emitAttr size);
119 // A helper method to perform a Rotate-Right shift operation
120 static UINT64 ROR_helper(UINT64 value, unsigned sh, unsigned width);
122 // A helper method to perform a 'NOT' bitwise complement operation
123 static UINT64 NOT_helper(UINT64 value, unsigned width);
125 // A helper method to perform a bit Replicate operation
126 static UINT64 Replicate_helper(UINT64 value, unsigned width, emitAttr size);
128 /************************************************************************
130 * This union is used to to encode/decode the special ARM64 immediate values
131 * that is listed as imm(N,r,s) and referred to as 'bitmask immediate'
137 unsigned immS : 6; // bits 0..5
138 unsigned immR : 6; // bits 6..11
139 unsigned immN : 1; // bits 12
141 unsigned immNRS; // concat N:R:S forming a 13-bit unsigned immediate
144 /************************************************************************
146 * Convert between a 64-bit immediate and its 'bitmask immediate'
147 * representation imm(i16,hw)
150 static emitter::bitMaskImm emitEncodeBitMaskImm(INT64 imm, emitAttr size);
152 static INT64 emitDecodeBitMaskImm(const emitter::bitMaskImm bmImm, emitAttr size);
154 /************************************************************************
156 * This union is used to to encode/decode the special ARM64 immediate values
157 * that is listed as imm(i16,hw) and referred to as 'halfword immediate'
163 unsigned immVal : 16; // bits 0..15
164 unsigned immHW : 2; // bits 16..17
166 unsigned immHWVal; // concat HW:Val forming a 18-bit unsigned immediate
169 /************************************************************************
171 * Convert between a 64-bit immediate and its 'halfword immediate'
172 * representation imm(i16,hw)
175 static emitter::halfwordImm emitEncodeHalfwordImm(INT64 imm, emitAttr size);
177 static INT64 emitDecodeHalfwordImm(const emitter::halfwordImm hwImm, emitAttr size);
179 /************************************************************************
181 * This union is used to encode/decode the special ARM64 immediate values
182 * that is listed as imm(i16,by) and referred to as 'byteShifted immediate'
185 union byteShiftedImm {
188 unsigned immVal : 8; // bits 0..7
189 unsigned immBY : 2; // bits 8..9
190 unsigned immOnes : 1; // bit 10
192 unsigned immBSVal; // concat Ones:BY:Val forming a 10-bit unsigned immediate
195 /************************************************************************
197 * Convert between a 16/32-bit immediate and its 'byteShifted immediate'
198 * representation imm(i8,by)
201 static emitter::byteShiftedImm emitEncodeByteShiftedImm(INT64 imm, emitAttr size, bool allow_MSL);
203 static INT32 emitDecodeByteShiftedImm(const emitter::byteShiftedImm bsImm, emitAttr size);
205 /************************************************************************
207 * This union is used to to encode/decode the special ARM64 immediate values
208 * that are use for FMOV immediate and referred to as 'float 8-bit immediate'
214 unsigned immMant : 4; // bits 0..3
215 unsigned immExp : 3; // bits 4..6
216 unsigned immSign : 1; // bits 7
218 unsigned immFPIVal; // concat Sign:Exp:Mant forming an 8-bit unsigned immediate
221 /************************************************************************
223 * Convert between a double and its 'float 8-bit immediate' representation
226 static emitter::floatImm8 emitEncodeFloatImm8(double immDbl);
228 static double emitDecodeFloatImm8(const emitter::floatImm8 fpImm);
230 /************************************************************************
232 * This union is used to to encode/decode the cond, nzcv and imm5 values for
233 * instructions that use them in the small constant immediate field
239 insCond cond : 4; // bits 0..3
240 insCflags flags : 4; // bits 4..7
241 unsigned imm5 : 5; // bits 8..12
243 unsigned immCFVal; // concat imm5:flags:cond forming an 13-bit unsigned immediate
246 // Returns an encoding for the specified register used in the 'Rd' position
247 static code_t insEncodeReg_Rd(regNumber reg);
249 // Returns an encoding for the specified register used in the 'Rt' position
250 static code_t insEncodeReg_Rt(regNumber reg);
252 // Returns an encoding for the specified register used in the 'Rn' position
253 static code_t insEncodeReg_Rn(regNumber reg);
255 // Returns an encoding for the specified register used in the 'Rm' position
256 static code_t insEncodeReg_Rm(regNumber reg);
258 // Returns an encoding for the specified register used in the 'Ra' position
259 static code_t insEncodeReg_Ra(regNumber reg);
261 // Returns an encoding for the specified register used in the 'Vd' position
262 static code_t insEncodeReg_Vd(regNumber reg);
264 // Returns an encoding for the specified register used in the 'Vt' position
265 static code_t insEncodeReg_Vt(regNumber reg);
267 // Returns an encoding for the specified register used in the 'Vn' position
268 static code_t insEncodeReg_Vn(regNumber reg);
270 // Returns an encoding for the specified register used in the 'Vm' position
271 static code_t insEncodeReg_Vm(regNumber reg);
273 // Returns an encoding for the specified register used in the 'Va' position
274 static code_t insEncodeReg_Va(regNumber reg);
276 // Returns an encoding for the imm which represents the condition code.
277 static code_t insEncodeCond(insCond cond);
279 // Returns an encoding for the imm whioch represents the 'condition code'
280 // with the lowest bit inverted (marked by invert(<cond>) in the architecture manual.
281 static code_t insEncodeInvertedCond(insCond cond);
283 // Returns an encoding for the imm which represents the flags.
284 static code_t insEncodeFlags(insCflags flags);
286 // Returns the encoding for the Shift Count bits to be used for Arm64 encodings
287 static code_t insEncodeShiftCount(ssize_t imm, emitAttr size);
289 // Returns the encoding to select the datasize for most Arm64 instructions
290 static code_t insEncodeDatasize(emitAttr size);
292 // Returns the encoding to select the datasize for the general load/store Arm64 instructions
293 static code_t insEncodeDatasizeLS(code_t code, emitAttr size);
295 // Returns the encoding to select the datasize for the vector load/store Arm64 instructions
296 static code_t insEncodeDatasizeVLS(code_t code, emitAttr size);
298 // Returns the encoding to select the datasize for the vector load/store pair Arm64 instructions
299 static code_t insEncodeDatasizeVPLS(code_t code, emitAttr size);
301 // Returns the encoding to select the datasize for bitfield Arm64 instructions
302 static code_t insEncodeDatasizeBF(code_t code, emitAttr size);
304 // Returns the encoding to select the vectorsize for SIMD Arm64 instructions
305 static code_t insEncodeVectorsize(emitAttr size);
307 // Returns the encoding to select 'index' for an Arm64 vector elem instruction
308 static code_t insEncodeVectorIndex(emitAttr elemsize, ssize_t index);
310 // Returns the encoding to select 'index2' for an Arm64 'ins' elem instruction
311 static code_t insEncodeVectorIndex2(emitAttr elemsize, ssize_t index2);
313 // Returns the encoding to select 'index' for an Arm64 'mul' elem instruction
314 static code_t insEncodeVectorIndexLMH(emitAttr elemsize, ssize_t index);
316 // Returns the encoding to shift by 'shift' bits for an Arm64 vector or scalar instruction
317 static code_t insEncodeVectorShift(emitAttr size, ssize_t shift);
319 // Returns the encoding to select the 1/2/4/8 byte elemsize for an Arm64 vector instruction
320 static code_t insEncodeElemsize(emitAttr size);
322 // Returns the encoding to select the 4/8 byte elemsize for an Arm64 float vector instruction
323 static code_t insEncodeFloatElemsize(emitAttr size);
325 // Returns the encoding to select the index for an Arm64 float vector by elem instruction
326 static code_t insEncodeFloatIndex(emitAttr elemsize, ssize_t index);
328 // Returns the encoding to select the 'conversion' operation for a type 'fmt' Arm64 instruction
329 static code_t insEncodeConvertOpt(insFormat fmt, insOpts conversion);
331 // Returns the encoding to have the Rn register of a ld/st reg be Pre/Post/Not indexed updated
332 static code_t insEncodeIndexedOpt(insOpts opt);
334 // Returns the encoding to have the Rn register of a ld/st pair be Pre/Post/Not indexed updated
335 static code_t insEncodePairIndexedOpt(instruction ins, insOpts opt);
337 // Returns the encoding to apply a Shift Type on the Rm register
338 static code_t insEncodeShiftType(insOpts opt);
340 // Returns the encoding to apply a 12 bit left shift to the immediate
341 static code_t insEncodeShiftImm12(insOpts opt);
343 // Returns the encoding to have the Rm register use an extend operation
344 static code_t insEncodeExtend(insOpts opt);
346 // Returns the encoding to scale the Rm register by {0,1,2,3,4} in an extend operation
347 static code_t insEncodeExtendScale(ssize_t imm);
349 // Returns the encoding to have the Rm register be auto scaled by the ld/st size
350 static code_t insEncodeReg3Scale(bool isScaled);
352 // Returns true if 'reg' represents an integer register.
353 static bool isIntegerRegister(regNumber reg)
355 return (reg >= REG_INT_FIRST) && (reg <= REG_INT_LAST);
358 // Returns true if 'value' is a legal unsigned immediate 8 bit encoding (such as for fMOV).
359 static bool isValidUimm8(ssize_t value)
361 return (0 <= value) && (value <= 0xFFLL);
364 // Returns true if 'value' is a legal unsigned immediate 12 bit encoding (such as for CMP, CMN).
365 static bool isValidUimm12(ssize_t value)
367 return (0 <= value) && (value <= 0xFFFLL);
370 // Returns true if 'value' is a legal unsigned immediate 16 bit encoding (such as for MOVZ, MOVN, MOVK).
371 static bool isValidUimm16(ssize_t value)
373 return (0 <= value) && (value <= 0xFFFFLL);
376 // Returns true if 'value' is a legal signed immediate 26 bit encoding (such as for B or BL).
377 static bool isValidSimm26(ssize_t value)
379 return (-0x2000000LL <= value) && (value <= 0x1FFFFFFLL);
382 // Returns true if 'value' is a legal signed immediate 19 bit encoding (such as for B.cond, CBNZ, CBZ).
383 static bool isValidSimm19(ssize_t value)
385 return (-0x40000LL <= value) && (value <= 0x3FFFFLL);
388 // Returns true if 'value' is a legal signed immediate 14 bit encoding (such as for TBNZ, TBZ).
389 static bool isValidSimm14(ssize_t value)
391 return (-0x2000LL <= value) && (value <= 0x1FFFLL);
394 // Returns true if 'value' represents a valid 'bitmask immediate' encoding.
395 static bool isValidImmNRS(size_t value, emitAttr size)
397 return (value >= 0) && (value < 0x2000);
398 } // any unsigned 13-bit immediate
400 // Returns true if 'value' represents a valid 'halfword immediate' encoding.
401 static bool isValidImmHWVal(size_t value, emitAttr size)
403 return (value >= 0) && (value < 0x40000);
404 } // any unsigned 18-bit immediate
406 // Returns true if 'value' represents a valid 'byteShifted immediate' encoding.
407 static bool isValidImmBSVal(size_t value, emitAttr size)
409 return (value >= 0) && (value < 0x800);
410 } // any unsigned 11-bit immediate
412 // The return value replaces REG_ZR with REG_SP
413 static regNumber encodingZRtoSP(regNumber reg)
415 return (reg == REG_ZR) ? REG_SP : reg;
416 } // ZR (R31) encodes the SP register
418 // The return value replaces REG_SP with REG_ZR
419 static regNumber encodingSPtoZR(regNumber reg)
421 return (reg == REG_SP) ? REG_ZR : reg;
422 } // SP is encoded using ZR (R31)
424 // For the given 'ins' returns the reverse instruction, if one exists, otherwise returns INS_INVALID
425 static instruction insReverse(instruction ins);
427 // For the given 'datasize' and 'elemsize' returns the insOpts that specifies the vector register arrangement
428 static insOpts optMakeArrangement(emitAttr datasize, emitAttr elemsize);
430 // For the given 'datasize' and 'opt' returns true if it specifies a valid vector register arrangement
431 static bool isValidArrangement(emitAttr datasize, insOpts opt);
433 // For the given 'arrangement' returns the 'datasize' specified by the vector register arrangement
434 static emitAttr optGetDatasize(insOpts arrangement);
436 // For the given 'arrangement' returns the 'elemsize' specified by the vector register arrangement
437 static emitAttr optGetElemsize(insOpts arrangement);
439 // For the given 'arrangement' returns the 'widen-arrangement' specified by the vector register arrangement
440 static insOpts optWidenElemsize(insOpts arrangement);
442 // For the given 'conversion' returns the 'dstsize' specified by the conversion option
443 static emitAttr optGetDstsize(insOpts conversion);
445 // For the given 'conversion' returns the 'srcsize' specified by the conversion option
446 static emitAttr optGetSrcsize(insOpts conversion);
448 // For the given 'datasize', 'elemsize' and 'index' returns true, if it specifies a valid 'index'
449 // for an element of size 'elemsize' in a vector register of size 'datasize'
450 static bool isValidVectorIndex(emitAttr datasize, emitAttr elemsize, ssize_t index);
452 /************************************************************************/
453 /* Public inline informational methods */
454 /************************************************************************/
457 // true if this 'imm' can be encoded as a input operand to a mov instruction
458 static bool emitIns_valid_imm_for_mov(INT64 imm, emitAttr size);
460 // true if this 'imm' can be encoded as a input operand to a vector movi instruction
461 static bool emitIns_valid_imm_for_movi(INT64 imm, emitAttr size);
463 // true if this 'immDbl' can be encoded as a input operand to a fmov instruction
464 static bool emitIns_valid_imm_for_fmov(double immDbl);
466 // true if this 'imm' can be encoded as a input operand to an add instruction
467 static bool emitIns_valid_imm_for_add(INT64 imm, emitAttr size = EA_8BYTE);
469 // true if this 'imm' can be encoded as a input operand to a cmp instruction
470 static bool emitIns_valid_imm_for_cmp(INT64 imm, emitAttr size);
472 // true if this 'imm' can be encoded as a input operand to an alu instruction
473 static bool emitIns_valid_imm_for_alu(INT64 imm, emitAttr size);
475 // true if this 'imm' can be encoded as the offset in a ldr/str instruction
476 static bool emitIns_valid_imm_for_ldst_offset(INT64 imm, emitAttr size);
478 // true if 'imm' can use the left shifted by 12 bits encoding
479 static bool canEncodeWithShiftImmBy12(INT64 imm);
481 // Normalize the 'imm' so that the upper bits, as defined by 'size' are zero
482 static INT64 normalizeImm64(INT64 imm, emitAttr size);
484 // Normalize the 'imm' so that the upper bits, as defined by 'size' are zero
485 static INT32 normalizeImm32(INT32 imm, emitAttr size);
487 // true if 'imm' can be encoded using a 'bitmask immediate', also returns the encoding if wbBMI is non-null
488 static bool canEncodeBitMaskImm(INT64 imm, emitAttr size, emitter::bitMaskImm* wbBMI = nullptr);
490 // true if 'imm' can be encoded using a 'halfword immediate', also returns the encoding if wbHWI is non-null
491 static bool canEncodeHalfwordImm(INT64 imm, emitAttr size, emitter::halfwordImm* wbHWI = nullptr);
493 // true if 'imm' can be encoded using a 'byteShifted immediate', also returns the encoding if wbBSI is non-null
494 static bool canEncodeByteShiftedImm(INT64 imm, emitAttr size, bool allow_MSL, emitter::byteShiftedImm* wbBSI = nullptr);
496 // true if 'immDbl' can be encoded using a 'float immediate', also returns the encoding if wbFPI is non-null
497 static bool canEncodeFloatImm8(double immDbl, emitter::floatImm8* wbFPI = nullptr);
499 // Returns the number of bits used by the given 'size'.
500 inline static unsigned getBitWidth(emitAttr size)
502 assert(size <= EA_8BYTE);
503 return (unsigned)size * BITS_PER_BYTE;
506 // Returns true if the imm represents a valid bit shift or bit position for the given 'size' [0..31] or [0..63]
507 inline static unsigned isValidImmShift(ssize_t imm, emitAttr size)
509 return (imm >= 0) && (imm < getBitWidth(size));
512 inline static bool isValidGeneralDatasize(emitAttr size)
514 return (size == EA_8BYTE) || (size == EA_4BYTE);
517 inline static bool isValidScalarDatasize(emitAttr size)
519 return (size == EA_8BYTE) || (size == EA_4BYTE);
522 inline static bool isValidVectorDatasize(emitAttr size)
524 return (size == EA_16BYTE) || (size == EA_8BYTE);
527 inline static bool isValidGeneralLSDatasize(emitAttr size)
529 return (size == EA_8BYTE) || (size == EA_4BYTE) || (size == EA_2BYTE) || (size == EA_1BYTE);
532 inline static bool isValidVectorLSDatasize(emitAttr size)
534 return (size == EA_16BYTE) || (size == EA_8BYTE) || (size == EA_4BYTE) || (size == EA_2BYTE) || (size == EA_1BYTE);
537 inline static bool isValidVectorLSPDatasize(emitAttr size)
539 return (size == EA_16BYTE) || (size == EA_8BYTE) || (size == EA_4BYTE);
542 inline static bool isValidVectorElemsize(emitAttr size)
544 return (size == EA_8BYTE) || (size == EA_4BYTE) || (size == EA_2BYTE) || (size == EA_1BYTE);
547 inline static bool isValidVectorFcvtsize(emitAttr size)
549 return (size == EA_8BYTE) || (size == EA_4BYTE) || (size == EA_2BYTE);
552 inline static bool isValidVectorElemsizeFloat(emitAttr size)
554 return (size == EA_8BYTE) || (size == EA_4BYTE);
557 inline static bool isGeneralRegister(regNumber reg)
559 return (reg >= REG_INT_FIRST) && (reg <= REG_LR);
562 inline static bool isGeneralRegisterOrZR(regNumber reg)
564 return (reg >= REG_INT_FIRST) && (reg <= REG_ZR);
567 inline static bool isGeneralRegisterOrSP(regNumber reg)
569 return isGeneralRegister(reg) || (reg == REG_SP);
570 } // Includes REG_SP, Excludes REG_ZR
572 inline static bool isVectorRegister(regNumber reg)
574 return (reg >= REG_FP_FIRST && reg <= REG_FP_LAST);
577 inline static bool isFloatReg(regNumber reg)
579 return isVectorRegister(reg);
582 inline static bool insOptsNone(insOpts opt)
584 return (opt == INS_OPTS_NONE);
587 inline static bool insOptsIndexed(insOpts opt)
589 return (opt == INS_OPTS_PRE_INDEX) || (opt == INS_OPTS_POST_INDEX);
592 inline static bool insOptsPreIndex(insOpts opt)
594 return (opt == INS_OPTS_PRE_INDEX);
597 inline static bool insOptsPostIndex(insOpts opt)
599 return (opt == INS_OPTS_POST_INDEX);
602 inline static bool insOptsLSL12(insOpts opt) // special 12-bit shift only used for imm12
604 return (opt == INS_OPTS_LSL12);
607 inline static bool insOptsAnyShift(insOpts opt)
609 return ((opt >= INS_OPTS_LSL) && (opt <= INS_OPTS_ROR));
612 inline static bool insOptsAluShift(insOpts opt) // excludes ROR
614 return ((opt >= INS_OPTS_LSL) && (opt <= INS_OPTS_ASR));
617 inline static bool insOptsVectorImmShift(insOpts opt)
619 return ((opt == INS_OPTS_LSL) || (opt == INS_OPTS_MSL));
622 inline static bool insOptsLSL(insOpts opt)
624 return (opt == INS_OPTS_LSL);
627 inline static bool insOptsLSR(insOpts opt)
629 return (opt == INS_OPTS_LSR);
632 inline static bool insOptsASR(insOpts opt)
634 return (opt == INS_OPTS_ASR);
637 inline static bool insOptsROR(insOpts opt)
639 return (opt == INS_OPTS_ROR);
642 inline static bool insOptsAnyExtend(insOpts opt)
644 return ((opt >= INS_OPTS_UXTB) && (opt <= INS_OPTS_SXTX));
647 inline static bool insOptsLSExtend(insOpts opt)
649 return ((opt == INS_OPTS_NONE) || (opt == INS_OPTS_LSL) || (opt == INS_OPTS_UXTW) || (opt == INS_OPTS_SXTW) ||
650 (opt == INS_OPTS_UXTX) || (opt == INS_OPTS_SXTX));
653 inline static bool insOpts32BitExtend(insOpts opt)
655 return ((opt == INS_OPTS_UXTW) || (opt == INS_OPTS_SXTW));
658 inline static bool insOpts64BitExtend(insOpts opt)
660 return ((opt == INS_OPTS_UXTX) || (opt == INS_OPTS_SXTX));
663 inline static bool insOptsAnyArrangement(insOpts opt)
665 return ((opt >= INS_OPTS_8B) && (opt <= INS_OPTS_2D));
668 inline static bool insOptsConvertFloatToFloat(insOpts opt)
670 return ((opt >= INS_OPTS_S_TO_D) && (opt <= INS_OPTS_D_TO_H));
673 inline static bool insOptsConvertFloatToInt(insOpts opt)
675 return ((opt >= INS_OPTS_S_TO_4BYTE) && (opt <= INS_OPTS_D_TO_8BYTE));
678 inline static bool insOptsConvertIntToFloat(insOpts opt)
680 return ((opt >= INS_OPTS_4BYTE_TO_S) && (opt <= INS_OPTS_8BYTE_TO_D));
683 static bool isValidImmCond(ssize_t imm);
684 static bool isValidImmCondFlags(ssize_t imm);
685 static bool isValidImmCondFlagsImm5(ssize_t imm);
687 /************************************************************************/
688 /* The public entry points to output instructions */
689 /************************************************************************/
692 void emitIns(instruction ins);
694 void emitIns_I(instruction ins, emitAttr attr, ssize_t imm);
696 void emitIns_R(instruction ins, emitAttr attr, regNumber reg);
698 void emitIns_R_I(instruction ins, emitAttr attr, regNumber reg, ssize_t imm, insOpts opt = INS_OPTS_NONE);
700 void emitIns_R_F(instruction ins, emitAttr attr, regNumber reg, double immDbl, insOpts opt = INS_OPTS_NONE);
702 void emitIns_R_R(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, insOpts opt = INS_OPTS_NONE);
704 void emitIns_R_R(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, insFlags flags)
706 emitIns_R_R(ins, attr, reg1, reg2);
710 instruction ins, emitAttr attr, regNumber reg1, ssize_t imm1, ssize_t imm2, insOpts opt = INS_OPTS_NONE);
713 instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, ssize_t imm, insOpts opt = INS_OPTS_NONE);
715 // Checks for a large immediate that needs a second instruction
716 void emitIns_R_R_Imm(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, ssize_t imm);
719 instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, regNumber reg3, insOpts opt = INS_OPTS_NONE);
721 void emitIns_R_R_R_I(instruction ins,
727 insOpts opt = INS_OPTS_NONE,
728 emitAttr attrReg2 = EA_UNKNOWN);
730 void emitIns_R_R_R_Ext(instruction ins,
735 insOpts opt = INS_OPTS_NONE,
736 int shiftAmount = -1);
738 void emitIns_R_R_I_I(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, int imm1, int imm2);
740 void emitIns_R_R_R_R(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, regNumber reg3, regNumber reg4);
742 void emitIns_R_COND(instruction ins, emitAttr attr, regNumber reg, insCond cond);
744 void emitIns_R_R_COND(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, insCond cond);
746 void emitIns_R_R_R_COND(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, regNumber reg3, insCond cond);
748 void emitIns_R_R_FLAGS_COND(
749 instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, insCflags flags, insCond cond);
751 void emitIns_R_I_FLAGS_COND(instruction ins, emitAttr attr, regNumber reg1, int imm, insCflags flags, insCond cond);
753 void emitIns_BARR(instruction ins, insBarrier barrier);
755 void emitIns_C(instruction ins, emitAttr attr, CORINFO_FIELD_HANDLE fdlHnd, int offs);
757 void emitIns_S(instruction ins, emitAttr attr, int varx, int offs);
759 void emitIns_S_R(instruction ins, emitAttr attr, regNumber ireg, int varx, int offs);
761 void emitIns_S_S_R_R(
762 instruction ins, emitAttr attr, emitAttr attr2, regNumber ireg, regNumber ireg2, int varx, int offs);
764 void emitIns_R_S(instruction ins, emitAttr attr, regNumber ireg, int varx, int offs);
766 void emitIns_R_R_S_S(
767 instruction ins, emitAttr attr, emitAttr attr2, regNumber ireg, regNumber ireg2, int varx, int offs);
769 void emitIns_S_I(instruction ins, emitAttr attr, int varx, int offs, int val);
772 instruction ins, emitAttr attr, regNumber reg, regNumber tmpReg, CORINFO_FIELD_HANDLE fldHnd, int offs);
774 void emitIns_C_R(instruction ins, emitAttr attr, CORINFO_FIELD_HANDLE fldHnd, regNumber reg, int offs);
776 void emitIns_C_I(instruction ins, emitAttr attr, CORINFO_FIELD_HANDLE fdlHnd, ssize_t offs, ssize_t val);
778 void emitIns_R_L(instruction ins, emitAttr attr, BasicBlock* dst, regNumber reg);
780 void emitIns_R_D(instruction ins, emitAttr attr, unsigned offs, regNumber reg);
782 void emitIns_J_R(instruction ins, emitAttr attr, BasicBlock* dst, regNumber reg);
785 instruction ins, emitAttr attr, int val, regNumber reg, int offs, int memCookie = 0, void* clsCookie = NULL);
788 instruction ins, emitAttr attr, regNumber ireg, regNumber reg, int offs, int memCookie = 0, void* clsCookie = NULL);
790 void emitIns_R_AI(instruction ins, emitAttr attr, regNumber ireg, ssize_t disp);
793 instruction ins, emitAttr attr, regNumber ireg, regNumber reg, int offs, int memCookie = 0, void* clsCookie = NULL);
795 void emitIns_R_ARR(instruction ins, emitAttr attr, regNumber ireg, regNumber reg, regNumber rg2, int disp);
797 void emitIns_ARR_R(instruction ins, emitAttr attr, regNumber ireg, regNumber reg, regNumber rg2, int disp);
800 instruction ins, emitAttr attr, regNumber ireg, regNumber reg, regNumber rg2, unsigned mul, int disp);
805 // I have included here, but commented out, all the values used by the x86 emitter.
806 // However, ARM has a much reduced instruction set, and so the ARM emitter only
807 // supports a subset of the x86 variants. By leaving them commented out, it becomes
808 // a compile time error if code tries to use them (and hopefully see this comment
809 // and know why they are unavailible on ARM), while making it easier to stay
810 // in-sync with x86 and possibly add them back in if needed.
812 EC_FUNC_TOKEN, // Direct call to a helper/static/nonvirtual/global method
813 // EC_FUNC_TOKEN_INDIR, // Indirect call to a helper/static/nonvirtual/global method
814 EC_FUNC_ADDR, // Direct call to an absolute address
816 // EC_FUNC_VIRTUAL, // Call to a virtual method (using the vtable)
817 EC_INDIR_R, // Indirect call via register
818 // EC_INDIR_SR, // Indirect call via stack-reference (local var)
819 // EC_INDIR_C, // Indirect call via static class var
820 // EC_INDIR_ARD, // Indirect call via an addressing mode
825 void emitIns_Call(EmitCallType callType,
826 CORINFO_METHOD_HANDLE methHnd,
827 INDEBUG_LDISASM_COMMA(CORINFO_SIG_INFO* sigInfo) // used to report call sites to the EE
831 emitAttr secondRetSize,
832 VARSET_VALARG_TP ptrVars,
835 IL_OFFSETX ilOffset = BAD_IL_OFFSET,
836 regNumber ireg = REG_NA,
837 regNumber xreg = REG_NA,
842 bool isProfLeaveCB = false);
844 BYTE* emitOutputLJ(insGroup* ig, BYTE* dst, instrDesc* i);
845 unsigned emitOutputCall(insGroup* ig, BYTE* dst, instrDesc* i, code_t code);
846 BYTE* emitOutputLoadLabel(BYTE* dst, BYTE* srcAddr, BYTE* dstAddr, instrDescJmp* id);
847 BYTE* emitOutputShortBranch(BYTE* dst, instruction ins, insFormat fmt, ssize_t distVal, instrDescJmp* id);
848 BYTE* emitOutputShortAddress(BYTE* dst, instruction ins, insFormat fmt, ssize_t distVal, regNumber reg);
849 BYTE* emitOutputShortConstant(
850 BYTE* dst, instruction ins, insFormat fmt, ssize_t distVal, regNumber reg, emitAttr opSize);
852 /*****************************************************************************
854 * Given an instrDesc, return true if it's a conditional jump.
857 inline bool emitIsCondJump(instrDesc* jmp)
859 return ((jmp->idInsFmt() == IF_BI_0B) || (jmp->idInsFmt() == IF_LARGEJMP));
862 /*****************************************************************************
864 * Given an instrDesc, return true if it's a compare and jump.
867 inline bool emitIsCmpJump(instrDesc* jmp)
869 return ((jmp->idInsFmt() == IF_BI_1A) || (jmp->idInsFmt() == IF_BI_1B));
872 /*****************************************************************************
874 * Given a instrDesc, return true if it's an unconditional jump.
877 inline bool emitIsUncondJump(instrDesc* jmp)
879 return (jmp->idInsFmt() == IF_BI_0A);
882 /*****************************************************************************
884 * Given a instrDesc, return true if it's a direct call.
887 inline bool emitIsDirectCall(instrDesc* call)
889 return (call->idInsFmt() == IF_BI_0C);
892 /*****************************************************************************
894 * Given a instrDesc, return true if it's a load label instruction.
897 inline bool emitIsLoadLabel(instrDesc* jmp)
899 return ((jmp->idInsFmt() == IF_DI_1E) || // adr or arp
900 (jmp->idInsFmt() == IF_LARGEADR));
903 /*****************************************************************************
905 * Given a instrDesc, return true if it's a load constant instruction.
908 inline bool emitIsLoadConstant(instrDesc* jmp)
910 return ((jmp->idInsFmt() == IF_LS_1A) || // ldr
911 (jmp->idInsFmt() == IF_LARGELDC));
914 #endif // _TARGET_ARM64_