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* emitNewInstrCallDir(int argCnt,
71 VARSET_VALARG_TP GCvars,
75 emitAttr secondRetSize);
77 instrDesc* emitNewInstrCallInd(int argCnt,
79 VARSET_VALARG_TP GCvars,
83 emitAttr secondRetSize);
85 /************************************************************************/
86 /* Private helpers for instruction output */
87 /************************************************************************/
90 bool emitInsIsCompare(instruction ins);
91 bool emitInsIsLoad(instruction ins);
92 bool emitInsIsStore(instruction ins);
93 bool emitInsIsLoadOrStore(instruction ins);
94 emitAttr emitInsAdjustLoadStoreAttr(instruction ins, emitAttr attr);
95 emitAttr emitInsTargetRegSize(instrDesc* id);
96 emitAttr emitInsLoadStoreSize(instrDesc* id);
98 emitter::insFormat emitInsFormat(instruction ins);
99 emitter::code_t emitInsCode(instruction ins, insFormat fmt);
101 // Generate code for a load or store operation and handle the case of contained GT_LEA op1 with [base + index<<scale +
103 void emitInsLoadStoreOp(instruction ins, emitAttr attr, regNumber dataReg, GenTreeIndir* indir);
105 // Emit the 32-bit Arm64 instruction 'code' into the 'dst' buffer
106 static unsigned emitOutput_Instr(BYTE* dst, code_t code);
108 // A helper method to return the natural scale for an EA 'size'
109 static unsigned NaturalScale_helper(emitAttr size);
111 // A helper method to perform a Rotate-Right shift operation
112 static UINT64 ROR_helper(UINT64 value, unsigned sh, unsigned width);
114 // A helper method to perform a 'NOT' bitwise complement operation
115 static UINT64 NOT_helper(UINT64 value, unsigned width);
117 // A helper method to perform a bit Replicate operation
118 static UINT64 Replicate_helper(UINT64 value, unsigned width, emitAttr size);
120 /************************************************************************
122 * This union is used to to encode/decode the special ARM64 immediate values
123 * that is listed as imm(N,r,s) and referred to as 'bitmask immediate'
129 unsigned immS : 6; // bits 0..5
130 unsigned immR : 6; // bits 6..11
131 unsigned immN : 1; // bits 12
133 unsigned immNRS; // concat N:R:S forming a 13-bit unsigned immediate
136 /************************************************************************
138 * Convert between a 64-bit immediate and its 'bitmask immediate'
139 * representation imm(i16,hw)
142 static emitter::bitMaskImm emitEncodeBitMaskImm(INT64 imm, emitAttr size);
144 static INT64 emitDecodeBitMaskImm(const emitter::bitMaskImm bmImm, emitAttr size);
146 /************************************************************************
148 * This union is used to to encode/decode the special ARM64 immediate values
149 * that is listed as imm(i16,hw) and referred to as 'halfword immediate'
155 unsigned immVal : 16; // bits 0..15
156 unsigned immHW : 2; // bits 16..17
158 unsigned immHWVal; // concat HW:Val forming a 18-bit unsigned immediate
161 /************************************************************************
163 * Convert between a 64-bit immediate and its 'halfword immediate'
164 * representation imm(i16,hw)
167 static emitter::halfwordImm emitEncodeHalfwordImm(INT64 imm, emitAttr size);
169 static INT64 emitDecodeHalfwordImm(const emitter::halfwordImm hwImm, emitAttr size);
171 /************************************************************************
173 * This union is used to encode/decode the special ARM64 immediate values
174 * that is listed as imm(i16,by) and referred to as 'byteShifted immediate'
177 union byteShiftedImm {
180 unsigned immVal : 8; // bits 0..7
181 unsigned immBY : 2; // bits 8..9
182 unsigned immOnes : 1; // bit 10
184 unsigned immBSVal; // concat Ones:BY:Val forming a 10-bit unsigned immediate
187 /************************************************************************
189 * Convert between a 16/32-bit immediate and its 'byteShifted immediate'
190 * representation imm(i8,by)
193 static emitter::byteShiftedImm emitEncodeByteShiftedImm(INT64 imm, emitAttr size, bool allow_MSL);
195 static INT32 emitDecodeByteShiftedImm(const emitter::byteShiftedImm bsImm, emitAttr size);
197 /************************************************************************
199 * This union is used to to encode/decode the special ARM64 immediate values
200 * that are use for FMOV immediate and referred to as 'float 8-bit immediate'
206 unsigned immMant : 4; // bits 0..3
207 unsigned immExp : 3; // bits 4..6
208 unsigned immSign : 1; // bits 7
210 unsigned immFPIVal; // concat Sign:Exp:Mant forming an 8-bit unsigned immediate
213 /************************************************************************
215 * Convert between a double and its 'float 8-bit immediate' representation
218 static emitter::floatImm8 emitEncodeFloatImm8(double immDbl);
220 static double emitDecodeFloatImm8(const emitter::floatImm8 fpImm);
222 /************************************************************************
224 * This union is used to to encode/decode the cond, nzcv and imm5 values for
225 * instructions that use them in the small constant immediate field
231 insCond cond : 4; // bits 0..3
232 insCflags flags : 4; // bits 4..7
233 unsigned imm5 : 5; // bits 8..12
235 unsigned immCFVal; // concat imm5:flags:cond forming an 13-bit unsigned immediate
238 // Returns an encoding for the specified register used in the 'Rd' position
239 static code_t insEncodeReg_Rd(regNumber reg);
241 // Returns an encoding for the specified register used in the 'Rt' position
242 static code_t insEncodeReg_Rt(regNumber reg);
244 // Returns an encoding for the specified register used in the 'Rn' position
245 static code_t insEncodeReg_Rn(regNumber reg);
247 // Returns an encoding for the specified register used in the 'Rm' position
248 static code_t insEncodeReg_Rm(regNumber reg);
250 // Returns an encoding for the specified register used in the 'Ra' position
251 static code_t insEncodeReg_Ra(regNumber reg);
253 // Returns an encoding for the specified register used in the 'Vd' position
254 static code_t insEncodeReg_Vd(regNumber reg);
256 // Returns an encoding for the specified register used in the 'Vt' position
257 static code_t insEncodeReg_Vt(regNumber reg);
259 // Returns an encoding for the specified register used in the 'Vn' position
260 static code_t insEncodeReg_Vn(regNumber reg);
262 // Returns an encoding for the specified register used in the 'Vm' position
263 static code_t insEncodeReg_Vm(regNumber reg);
265 // Returns an encoding for the specified register used in the 'Va' position
266 static code_t insEncodeReg_Va(regNumber reg);
268 // Returns an encoding for the imm which represents the condition code.
269 static code_t insEncodeCond(insCond cond);
271 // Returns an encoding for the imm whioch represents the 'condition code'
272 // with the lowest bit inverted (marked by invert(<cond>) in the architecture manual.
273 static code_t insEncodeInvertedCond(insCond cond);
275 // Returns an encoding for the imm which represents the flags.
276 static code_t insEncodeFlags(insCflags flags);
278 // Returns the encoding for the Shift Count bits to be used for Arm64 encodings
279 static code_t insEncodeShiftCount(ssize_t imm, emitAttr size);
281 // Returns the encoding to select the datasize for most Arm64 instructions
282 static code_t insEncodeDatasize(emitAttr size);
284 // Returns the encoding to select the datasize for the general load/store Arm64 instructions
285 static code_t insEncodeDatasizeLS(code_t code, emitAttr size);
287 // Returns the encoding to select the datasize for the vector load/store Arm64 instructions
288 static code_t insEncodeDatasizeVLS(code_t code, emitAttr size);
290 // Returns the encoding to select the datasize for the vector load/store pair Arm64 instructions
291 static code_t insEncodeDatasizeVPLS(code_t code, emitAttr size);
293 // Returns the encoding to select the datasize for bitfield Arm64 instructions
294 static code_t insEncodeDatasizeBF(code_t code, emitAttr size);
296 // Returns the encoding to select the vectorsize for SIMD Arm64 instructions
297 static code_t insEncodeVectorsize(emitAttr size);
299 // Returns the encoding to select 'index' for an Arm64 vector elem instruction
300 static code_t insEncodeVectorIndex(emitAttr elemsize, ssize_t index);
302 // Returns the encoding to select 'index2' for an Arm64 'ins' elem instruction
303 static code_t insEncodeVectorIndex2(emitAttr elemsize, ssize_t index2);
305 // Returns the encoding to select 'index' for an Arm64 'mul' elem instruction
306 static code_t insEncodeVectorIndexLMH(emitAttr elemsize, ssize_t index);
308 // Returns the encoding to shift by 'shift' bits for an Arm64 vector or scalar instruction
309 static code_t insEncodeVectorShift(emitAttr size, ssize_t shift);
311 // Returns the encoding to select the 1/2/4/8 byte elemsize for an Arm64 vector instruction
312 static code_t insEncodeElemsize(emitAttr size);
314 // Returns the encoding to select the 4/8 byte elemsize for an Arm64 float vector instruction
315 static code_t insEncodeFloatElemsize(emitAttr size);
317 // Returns the encoding to select the index for an Arm64 float vector by elem instruction
318 static code_t insEncodeFloatIndex(emitAttr elemsize, ssize_t index);
320 // Returns the encoding to select the 'conversion' operation for a type 'fmt' Arm64 instruction
321 static code_t insEncodeConvertOpt(insFormat fmt, insOpts conversion);
323 // Returns the encoding to have the Rn register of a ld/st reg be Pre/Post/Not indexed updated
324 static code_t insEncodeIndexedOpt(insOpts opt);
326 // Returns the encoding to have the Rn register of a ld/st pair be Pre/Post/Not indexed updated
327 static code_t insEncodePairIndexedOpt(instruction ins, insOpts opt);
329 // Returns the encoding to apply a Shift Type on the Rm register
330 static code_t insEncodeShiftType(insOpts opt);
332 // Returns the encoding to apply a 12 bit left shift to the immediate
333 static code_t insEncodeShiftImm12(insOpts opt);
335 // Returns the encoding to have the Rm register use an extend operation
336 static code_t insEncodeExtend(insOpts opt);
338 // Returns the encoding to scale the Rm register by {0,1,2,3,4} in an extend operation
339 static code_t insEncodeExtendScale(ssize_t imm);
341 // Returns the encoding to have the Rm register be auto scaled by the ld/st size
342 static code_t insEncodeReg3Scale(bool isScaled);
344 // Returns true if 'reg' represents an integer register.
345 static bool isIntegerRegister(regNumber reg)
347 return (reg >= REG_INT_FIRST) && (reg <= REG_INT_LAST);
350 // Returns true if 'value' is a legal unsigned immediate 8 bit encoding (such as for fMOV).
351 static bool isValidUimm8(ssize_t value)
353 return (0 <= value) && (value <= 0xFFLL);
356 // Returns true if 'value' is a legal unsigned immediate 12 bit encoding (such as for CMP, CMN).
357 static bool isValidUimm12(ssize_t value)
359 return (0 <= value) && (value <= 0xFFFLL);
362 // Returns true if 'value' is a legal unsigned immediate 16 bit encoding (such as for MOVZ, MOVN, MOVK).
363 static bool isValidUimm16(ssize_t value)
365 return (0 <= value) && (value <= 0xFFFFLL);
368 // Returns true if 'value' is a legal signed immediate 26 bit encoding (such as for B or BL).
369 static bool isValidSimm26(ssize_t value)
371 return (-0x2000000LL <= value) && (value <= 0x1FFFFFFLL);
374 // Returns true if 'value' is a legal signed immediate 19 bit encoding (such as for B.cond, CBNZ, CBZ).
375 static bool isValidSimm19(ssize_t value)
377 return (-0x40000LL <= value) && (value <= 0x3FFFFLL);
380 // Returns true if 'value' is a legal signed immediate 14 bit encoding (such as for TBNZ, TBZ).
381 static bool isValidSimm14(ssize_t value)
383 return (-0x2000LL <= value) && (value <= 0x1FFFLL);
386 // Returns true if 'value' represents a valid 'bitmask immediate' encoding.
387 static bool isValidImmNRS(size_t value, emitAttr size)
389 return (value >= 0) && (value < 0x2000);
390 } // any unsigned 13-bit immediate
392 // Returns true if 'value' represents a valid 'halfword immediate' encoding.
393 static bool isValidImmHWVal(size_t value, emitAttr size)
395 return (value >= 0) && (value < 0x40000);
396 } // any unsigned 18-bit immediate
398 // Returns true if 'value' represents a valid 'byteShifted immediate' encoding.
399 static bool isValidImmBSVal(size_t value, emitAttr size)
401 return (value >= 0) && (value < 0x800);
402 } // any unsigned 11-bit immediate
404 // The return value replaces REG_ZR with REG_SP
405 static regNumber encodingZRtoSP(regNumber reg)
407 return (reg == REG_ZR) ? REG_SP : reg;
408 } // ZR (R31) encodes the SP register
410 // The return value replaces REG_SP with REG_ZR
411 static regNumber encodingSPtoZR(regNumber reg)
413 return (reg == REG_SP) ? REG_ZR : reg;
414 } // SP is encoded using ZR (R31)
416 // For the given 'ins' returns the reverse instruction, if one exists, otherwise returns INS_INVALID
417 static instruction insReverse(instruction ins);
419 // For the given 'datasize' and 'elemsize' returns the insOpts that specifies the vector register arrangement
420 static insOpts optMakeArrangement(emitAttr datasize, emitAttr elemsize);
422 // For the given 'datasize' and 'opt' returns true if it specifies a valid vector register arrangement
423 static bool isValidArrangement(emitAttr datasize, insOpts opt);
425 // For the given 'arrangement' returns the 'datasize' specified by the vector register arrangement
426 static emitAttr optGetDatasize(insOpts arrangement);
428 // For the given 'arrangement' returns the 'elemsize' specified by the vector register arrangement
429 static emitAttr optGetElemsize(insOpts arrangement);
431 // For the given 'arrangement' returns the 'widen-arrangement' specified by the vector register arrangement
432 static insOpts optWidenElemsize(insOpts arrangement);
434 // For the given 'conversion' returns the 'dstsize' specified by the conversion option
435 static emitAttr optGetDstsize(insOpts conversion);
437 // For the given 'conversion' returns the 'srcsize' specified by the conversion option
438 static emitAttr optGetSrcsize(insOpts conversion);
440 // For the given 'datasize', 'elemsize' and 'index' returns true, if it specifies a valid 'index'
441 // for an element of size 'elemsize' in a vector register of size 'datasize'
442 static bool isValidVectorIndex(emitAttr datasize, emitAttr elemsize, ssize_t index);
444 /************************************************************************/
445 /* Public inline informational methods */
446 /************************************************************************/
449 // true if this 'imm' can be encoded as a input operand to a mov instruction
450 static bool emitIns_valid_imm_for_mov(INT64 imm, emitAttr size);
452 // true if this 'imm' can be encoded as a input operand to a vector movi instruction
453 static bool emitIns_valid_imm_for_movi(INT64 imm, emitAttr size);
455 // true if this 'immDbl' can be encoded as a input operand to a fmov instruction
456 static bool emitIns_valid_imm_for_fmov(double immDbl);
458 // true if this 'imm' can be encoded as a input operand to an add instruction
459 static bool emitIns_valid_imm_for_add(INT64 imm, emitAttr size = EA_8BYTE);
461 // true if this 'imm' can be encoded as a input operand to a cmp instruction
462 static bool emitIns_valid_imm_for_cmp(INT64 imm, emitAttr size);
464 // true if this 'imm' can be encoded as a input operand to an alu instruction
465 static bool emitIns_valid_imm_for_alu(INT64 imm, emitAttr size);
467 // true if this 'imm' can be encoded as the offset in a ldr/str instruction
468 static bool emitIns_valid_imm_for_ldst_offset(INT64 imm, emitAttr size);
470 // true if 'imm' can use the left shifted by 12 bits encoding
471 static bool canEncodeWithShiftImmBy12(INT64 imm);
473 // Normalize the 'imm' so that the upper bits, as defined by 'size' are zero
474 static INT64 normalizeImm64(INT64 imm, emitAttr size);
476 // Normalize the 'imm' so that the upper bits, as defined by 'size' are zero
477 static INT32 normalizeImm32(INT32 imm, emitAttr size);
479 // true if 'imm' can be encoded using a 'bitmask immediate', also returns the encoding if wbBMI is non-null
480 static bool canEncodeBitMaskImm(INT64 imm, emitAttr size, emitter::bitMaskImm* wbBMI = nullptr);
482 // true if 'imm' can be encoded using a 'halfword immediate', also returns the encoding if wbHWI is non-null
483 static bool canEncodeHalfwordImm(INT64 imm, emitAttr size, emitter::halfwordImm* wbHWI = nullptr);
485 // true if 'imm' can be encoded using a 'byteShifted immediate', also returns the encoding if wbBSI is non-null
486 static bool canEncodeByteShiftedImm(INT64 imm, emitAttr size, bool allow_MSL, emitter::byteShiftedImm* wbBSI = nullptr);
488 // true if 'immDbl' can be encoded using a 'float immediate', also returns the encoding if wbFPI is non-null
489 static bool canEncodeFloatImm8(double immDbl, emitter::floatImm8* wbFPI = nullptr);
491 // Returns the number of bits used by the given 'size'.
492 inline static unsigned getBitWidth(emitAttr size)
494 assert(size <= EA_8BYTE);
495 return (unsigned)size * BITS_PER_BYTE;
498 // Returns true if the imm represents a valid bit shift or bit position for the given 'size' [0..31] or [0..63]
499 inline static unsigned isValidImmShift(ssize_t imm, emitAttr size)
501 return (imm >= 0) && (imm < getBitWidth(size));
504 inline static bool isValidGeneralDatasize(emitAttr size)
506 return (size == EA_8BYTE) || (size == EA_4BYTE);
509 inline static bool isValidScalarDatasize(emitAttr size)
511 return (size == EA_8BYTE) || (size == EA_4BYTE);
514 inline static bool isValidVectorDatasize(emitAttr size)
516 return (size == EA_16BYTE) || (size == EA_8BYTE);
519 inline static bool isValidGeneralLSDatasize(emitAttr size)
521 return (size == EA_8BYTE) || (size == EA_4BYTE) || (size == EA_2BYTE) || (size == EA_1BYTE);
524 inline static bool isValidVectorLSDatasize(emitAttr size)
526 return (size == EA_16BYTE) || (size == EA_8BYTE) || (size == EA_4BYTE) || (size == EA_2BYTE) || (size == EA_1BYTE);
529 inline static bool isValidVectorLSPDatasize(emitAttr size)
531 return (size == EA_16BYTE) || (size == EA_8BYTE) || (size == EA_4BYTE);
534 inline static bool isValidVectorElemsize(emitAttr size)
536 return (size == EA_8BYTE) || (size == EA_4BYTE) || (size == EA_2BYTE) || (size == EA_1BYTE);
539 inline static bool isValidVectorFcvtsize(emitAttr size)
541 return (size == EA_8BYTE) || (size == EA_4BYTE) || (size == EA_2BYTE);
544 inline static bool isValidVectorElemsizeFloat(emitAttr size)
546 return (size == EA_8BYTE) || (size == EA_4BYTE);
549 inline static bool isGeneralRegister(regNumber reg)
551 return (reg >= REG_INT_FIRST) && (reg <= REG_LR);
554 inline static bool isGeneralRegisterOrZR(regNumber reg)
556 return (reg >= REG_INT_FIRST) && (reg <= REG_ZR);
559 inline static bool isGeneralRegisterOrSP(regNumber reg)
561 return isGeneralRegister(reg) || (reg == REG_SP);
562 } // Includes REG_SP, Excludes REG_ZR
564 inline static bool isVectorRegister(regNumber reg)
566 return (reg >= REG_FP_FIRST && reg <= REG_FP_LAST);
569 inline static bool isFloatReg(regNumber reg)
571 return isVectorRegister(reg);
574 inline static bool insOptsNone(insOpts opt)
576 return (opt == INS_OPTS_NONE);
579 inline static bool insOptsIndexed(insOpts opt)
581 return (opt == INS_OPTS_PRE_INDEX) || (opt == INS_OPTS_POST_INDEX);
584 inline static bool insOptsPreIndex(insOpts opt)
586 return (opt == INS_OPTS_PRE_INDEX);
589 inline static bool insOptsPostIndex(insOpts opt)
591 return (opt == INS_OPTS_POST_INDEX);
594 inline static bool insOptsLSL12(insOpts opt) // special 12-bit shift only used for imm12
596 return (opt == INS_OPTS_LSL12);
599 inline static bool insOptsAnyShift(insOpts opt)
601 return ((opt >= INS_OPTS_LSL) && (opt <= INS_OPTS_ROR));
604 inline static bool insOptsAluShift(insOpts opt) // excludes ROR
606 return ((opt >= INS_OPTS_LSL) && (opt <= INS_OPTS_ASR));
609 inline static bool insOptsVectorImmShift(insOpts opt)
611 return ((opt == INS_OPTS_LSL) || (opt == INS_OPTS_MSL));
614 inline static bool insOptsLSL(insOpts opt)
616 return (opt == INS_OPTS_LSL);
619 inline static bool insOptsLSR(insOpts opt)
621 return (opt == INS_OPTS_LSR);
624 inline static bool insOptsASR(insOpts opt)
626 return (opt == INS_OPTS_ASR);
629 inline static bool insOptsROR(insOpts opt)
631 return (opt == INS_OPTS_ROR);
634 inline static bool insOptsAnyExtend(insOpts opt)
636 return ((opt >= INS_OPTS_UXTB) && (opt <= INS_OPTS_SXTX));
639 inline static bool insOptsLSExtend(insOpts opt)
641 return ((opt == INS_OPTS_NONE) || (opt == INS_OPTS_LSL) || (opt == INS_OPTS_UXTW) || (opt == INS_OPTS_SXTW) ||
642 (opt == INS_OPTS_UXTX) || (opt == INS_OPTS_SXTX));
645 inline static bool insOpts32BitExtend(insOpts opt)
647 return ((opt == INS_OPTS_UXTW) || (opt == INS_OPTS_SXTW));
650 inline static bool insOpts64BitExtend(insOpts opt)
652 return ((opt == INS_OPTS_UXTX) || (opt == INS_OPTS_SXTX));
655 inline static bool insOptsAnyArrangement(insOpts opt)
657 return ((opt >= INS_OPTS_8B) && (opt <= INS_OPTS_2D));
660 inline static bool insOptsConvertFloatToFloat(insOpts opt)
662 return ((opt >= INS_OPTS_S_TO_D) && (opt <= INS_OPTS_D_TO_H));
665 inline static bool insOptsConvertFloatToInt(insOpts opt)
667 return ((opt >= INS_OPTS_S_TO_4BYTE) && (opt <= INS_OPTS_D_TO_8BYTE));
670 inline static bool insOptsConvertIntToFloat(insOpts opt)
672 return ((opt >= INS_OPTS_4BYTE_TO_S) && (opt <= INS_OPTS_8BYTE_TO_D));
675 static bool isValidImmCond(ssize_t imm);
676 static bool isValidImmCondFlags(ssize_t imm);
677 static bool isValidImmCondFlagsImm5(ssize_t imm);
679 /************************************************************************/
680 /* The public entry points to output instructions */
681 /************************************************************************/
684 void emitIns(instruction ins);
686 void emitIns_I(instruction ins, emitAttr attr, ssize_t imm);
688 void emitIns_R(instruction ins, emitAttr attr, regNumber reg);
690 void emitIns_R_I(instruction ins, emitAttr attr, regNumber reg, ssize_t imm, insOpts opt = INS_OPTS_NONE);
692 void emitIns_R_F(instruction ins, emitAttr attr, regNumber reg, double immDbl, insOpts opt = INS_OPTS_NONE);
694 void emitIns_R_R(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, insOpts opt = INS_OPTS_NONE);
696 void emitIns_R_R(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, insFlags flags)
698 emitIns_R_R(ins, attr, reg1, reg2);
702 instruction ins, emitAttr attr, regNumber reg1, ssize_t imm1, ssize_t imm2, insOpts opt = INS_OPTS_NONE);
705 instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, ssize_t imm, insOpts opt = INS_OPTS_NONE);
707 // Checks for a large immediate that needs a second instruction
708 void emitIns_R_R_Imm(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, ssize_t imm);
711 instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, regNumber reg3, insOpts opt = INS_OPTS_NONE);
713 void emitIns_R_R_R_I(instruction ins,
719 insOpts opt = INS_OPTS_NONE,
720 emitAttr attrReg2 = EA_UNKNOWN);
722 void emitIns_R_R_R_Ext(instruction ins,
727 insOpts opt = INS_OPTS_NONE,
728 int shiftAmount = -1);
730 void emitIns_R_R_I_I(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, int imm1, int imm2);
732 void emitIns_R_R_R_R(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, regNumber reg3, regNumber reg4);
734 void emitIns_R_COND(instruction ins, emitAttr attr, regNumber reg, insCond cond);
736 void emitIns_R_R_COND(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, insCond cond);
738 void emitIns_R_R_R_COND(instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, regNumber reg3, insCond cond);
740 void emitIns_R_R_FLAGS_COND(
741 instruction ins, emitAttr attr, regNumber reg1, regNumber reg2, insCflags flags, insCond cond);
743 void emitIns_R_I_FLAGS_COND(instruction ins, emitAttr attr, regNumber reg1, int imm, insCflags flags, insCond cond);
745 void emitIns_BARR(instruction ins, insBarrier barrier);
747 void emitIns_C(instruction ins, emitAttr attr, CORINFO_FIELD_HANDLE fdlHnd, int offs);
749 void emitIns_S(instruction ins, emitAttr attr, int varx, int offs);
751 void emitIns_S_R(instruction ins, emitAttr attr, regNumber ireg, int varx, int offs);
753 void emitIns_S_S_R_R(
754 instruction ins, emitAttr attr, emitAttr attr2, regNumber ireg, regNumber ireg2, int varx, int offs);
756 void emitIns_R_S(instruction ins, emitAttr attr, regNumber ireg, int varx, int offs);
758 void emitIns_R_R_S_S(
759 instruction ins, emitAttr attr, emitAttr attr2, regNumber ireg, regNumber ireg2, int varx, int offs);
761 void emitIns_S_I(instruction ins, emitAttr attr, int varx, int offs, int val);
764 instruction ins, emitAttr attr, regNumber reg, regNumber tmpReg, CORINFO_FIELD_HANDLE fldHnd, int offs);
766 void emitIns_C_R(instruction ins, emitAttr attr, CORINFO_FIELD_HANDLE fldHnd, regNumber reg, int offs);
768 void emitIns_C_I(instruction ins, emitAttr attr, CORINFO_FIELD_HANDLE fdlHnd, ssize_t offs, ssize_t val);
770 void emitIns_R_L(instruction ins, emitAttr attr, BasicBlock* dst, regNumber reg);
772 void emitIns_R_D(instruction ins, emitAttr attr, unsigned offs, regNumber reg);
774 void emitIns_J_R(instruction ins, emitAttr attr, BasicBlock* dst, regNumber reg);
776 void emitIns_J_R_I(instruction ins, emitAttr attr, BasicBlock* dst, regNumber reg, int imm);
778 void emitIns_I_AR(instruction ins, emitAttr attr, int val, regNumber reg, int offs);
780 void emitIns_R_AR(instruction ins, emitAttr attr, regNumber ireg, regNumber reg, int offs);
782 void emitIns_R_AI(instruction ins, emitAttr attr, regNumber ireg, ssize_t disp);
784 void emitIns_AR_R(instruction ins, emitAttr attr, regNumber ireg, regNumber reg, int offs);
786 void emitIns_R_ARR(instruction ins, emitAttr attr, regNumber ireg, regNumber reg, regNumber rg2, int disp);
788 void emitIns_ARR_R(instruction ins, emitAttr attr, regNumber ireg, regNumber reg, regNumber rg2, int disp);
791 instruction ins, emitAttr attr, regNumber ireg, regNumber reg, regNumber rg2, unsigned mul, int disp);
796 // I have included here, but commented out, all the values used by the x86 emitter.
797 // However, ARM has a much reduced instruction set, and so the ARM emitter only
798 // supports a subset of the x86 variants. By leaving them commented out, it becomes
799 // a compile time error if code tries to use them (and hopefully see this comment
800 // and know why they are unavailible on ARM), while making it easier to stay
801 // in-sync with x86 and possibly add them back in if needed.
803 EC_FUNC_TOKEN, // Direct call to a helper/static/nonvirtual/global method
804 // EC_FUNC_TOKEN_INDIR, // Indirect call to a helper/static/nonvirtual/global method
805 EC_FUNC_ADDR, // Direct call to an absolute address
807 // EC_FUNC_VIRTUAL, // Call to a virtual method (using the vtable)
808 EC_INDIR_R, // Indirect call via register
809 // EC_INDIR_SR, // Indirect call via stack-reference (local var)
810 // EC_INDIR_C, // Indirect call via static class var
811 // EC_INDIR_ARD, // Indirect call via an addressing mode
816 void emitIns_Call(EmitCallType callType,
817 CORINFO_METHOD_HANDLE methHnd,
818 INDEBUG_LDISASM_COMMA(CORINFO_SIG_INFO* sigInfo) // used to report call sites to the EE
822 emitAttr secondRetSize,
823 VARSET_VALARG_TP ptrVars,
826 IL_OFFSETX ilOffset = BAD_IL_OFFSET,
827 regNumber ireg = REG_NA,
828 regNumber xreg = REG_NA,
833 bool isProfLeaveCB = false);
835 BYTE* emitOutputLJ(insGroup* ig, BYTE* dst, instrDesc* i);
836 unsigned emitOutputCall(insGroup* ig, BYTE* dst, instrDesc* i, code_t code);
837 BYTE* emitOutputLoadLabel(BYTE* dst, BYTE* srcAddr, BYTE* dstAddr, instrDescJmp* id);
838 BYTE* emitOutputShortBranch(BYTE* dst, instruction ins, insFormat fmt, ssize_t distVal, instrDescJmp* id);
839 BYTE* emitOutputShortAddress(BYTE* dst, instruction ins, insFormat fmt, ssize_t distVal, regNumber reg);
840 BYTE* emitOutputShortConstant(
841 BYTE* dst, instruction ins, insFormat fmt, ssize_t distVal, regNumber reg, emitAttr opSize);
843 /*****************************************************************************
845 * Given an instrDesc, return true if it's a conditional jump.
848 inline bool emitIsCondJump(instrDesc* jmp)
850 return ((jmp->idInsFmt() == IF_BI_0B) || (jmp->idInsFmt() == IF_BI_1A) || (jmp->idInsFmt() == IF_BI_1B) ||
851 (jmp->idInsFmt() == IF_LARGEJMP));
854 /*****************************************************************************
856 * Given a instrDesc, return true if it's an unconditional jump.
859 inline bool emitIsUncondJump(instrDesc* jmp)
861 return (jmp->idInsFmt() == IF_BI_0A);
864 /*****************************************************************************
866 * Given a instrDesc, return true if it's a direct call.
869 inline bool emitIsDirectCall(instrDesc* call)
871 return (call->idInsFmt() == IF_BI_0C);
874 /*****************************************************************************
876 * Given a instrDesc, return true if it's a load label instruction.
879 inline bool emitIsLoadLabel(instrDesc* jmp)
881 return ((jmp->idInsFmt() == IF_DI_1E) || // adr or arp
882 (jmp->idInsFmt() == IF_LARGEADR));
885 /*****************************************************************************
887 * Given a instrDesc, return true if it's a load constant instruction.
890 inline bool emitIsLoadConstant(instrDesc* jmp)
892 return ((jmp->idInsFmt() == IF_LS_1A) || // ldr
893 (jmp->idInsFmt() == IF_LARGELDC));
896 #endif // _TARGET_ARM64_