1 /* aarch64-asm.c -- AArch64 assembler support.
2 Copyright (C) 2012-2016 Free Software Foundation, Inc.
3 Contributed by ARM Ltd.
5 This file is part of the GNU opcodes library.
7 This library is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 It is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; see the file COPYING3. If not,
19 see <http://www.gnu.org/licenses/>. */
23 #include "libiberty.h"
24 #include "aarch64-asm.h"
28 /* The unnamed arguments consist of the number of fields and information about
29 these fields where the VALUE will be inserted into CODE. MASK can be zero or
30 the base mask of the opcode.
32 N.B. the fields are required to be in such an order than the least signficant
33 field for VALUE comes the first, e.g. the <index> in
34 SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]
35 is encoded in H:L:M in some cases, the fields H:L:M should be passed in
36 the order of M, L, H. */
39 insert_fields (aarch64_insn *code, aarch64_insn value, aarch64_insn mask, ...)
42 const aarch64_field *field;
43 enum aarch64_field_kind kind;
47 num = va_arg (va, uint32_t);
51 kind = va_arg (va, enum aarch64_field_kind);
52 field = &fields[kind];
53 insert_field (kind, code, value, mask);
54 value >>= field->width;
59 /* Insert a raw field value VALUE into all fields in SELF->fields.
60 The least significant bit goes in the final field. */
63 insert_all_fields (const aarch64_operand *self, aarch64_insn *code,
67 enum aarch64_field_kind kind;
69 for (i = ARRAY_SIZE (self->fields); i-- > 0; )
70 if (self->fields[i] != FLD_NIL)
72 kind = self->fields[i];
73 insert_field (kind, code, value, 0);
74 value >>= fields[kind].width;
78 /* Operand inserters. */
80 /* Insert register number. */
82 aarch64_ins_regno (const aarch64_operand *self, const aarch64_opnd_info *info,
84 const aarch64_inst *inst ATTRIBUTE_UNUSED)
86 insert_field (self->fields[0], code, info->reg.regno, 0);
90 /* Insert register number, index and/or other data for SIMD register element
91 operand, e.g. the last source operand in
92 SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */
94 aarch64_ins_reglane (const aarch64_operand *self, const aarch64_opnd_info *info,
95 aarch64_insn *code, const aarch64_inst *inst)
98 insert_field (self->fields[0], code, info->reglane.regno, inst->opcode->mask);
99 /* index and/or type */
100 if (inst->opcode->iclass == asisdone || inst->opcode->iclass == asimdins)
102 int pos = info->qualifier - AARCH64_OPND_QLF_S_B;
103 if (info->type == AARCH64_OPND_En
104 && inst->opcode->operands[0] == AARCH64_OPND_Ed)
106 /* index2 for e.g. INS <Vd>.<Ts>[<index1>], <Vn>.<Ts>[<index2>]. */
107 assert (info->idx == 1); /* Vn */
108 aarch64_insn value = info->reglane.index << pos;
109 insert_field (FLD_imm4, code, value, 0);
113 /* index and type for e.g. DUP <V><d>, <Vn>.<T>[<index>].
120 aarch64_insn value = ((info->reglane.index << 1) | 1) << pos;
121 insert_field (FLD_imm5, code, value, 0);
126 /* index for e.g. SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]
127 or SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */
128 switch (info->qualifier)
130 case AARCH64_OPND_QLF_S_H:
132 insert_fields (code, info->reglane.index, 0, 3, FLD_M, FLD_L, FLD_H);
134 case AARCH64_OPND_QLF_S_S:
136 insert_fields (code, info->reglane.index, 0, 2, FLD_L, FLD_H);
138 case AARCH64_OPND_QLF_S_D:
140 insert_field (FLD_H, code, info->reglane.index, 0);
149 /* Insert regno and len field of a register list operand, e.g. Vn in TBL. */
151 aarch64_ins_reglist (const aarch64_operand *self, const aarch64_opnd_info *info,
153 const aarch64_inst *inst ATTRIBUTE_UNUSED)
156 insert_field (self->fields[0], code, info->reglist.first_regno, 0);
158 insert_field (FLD_len, code, info->reglist.num_regs - 1, 0);
162 /* Insert Rt and opcode fields for a register list operand, e.g. Vt
163 in AdvSIMD load/store instructions. */
165 aarch64_ins_ldst_reglist (const aarch64_operand *self ATTRIBUTE_UNUSED,
166 const aarch64_opnd_info *info, aarch64_insn *code,
167 const aarch64_inst *inst)
169 aarch64_insn value = 0;
170 /* Number of elements in each structure to be loaded/stored. */
171 unsigned num = get_opcode_dependent_value (inst->opcode);
174 insert_field (FLD_Rt, code, info->reglist.first_regno, 0);
179 switch (info->reglist.num_regs)
181 case 1: value = 0x7; break;
182 case 2: value = 0xa; break;
183 case 3: value = 0x6; break;
184 case 4: value = 0x2; break;
189 value = info->reglist.num_regs == 4 ? 0x3 : 0x8;
200 insert_field (FLD_opcode, code, value, 0);
205 /* Insert Rt and S fields for a register list operand, e.g. Vt in AdvSIMD load
206 single structure to all lanes instructions. */
208 aarch64_ins_ldst_reglist_r (const aarch64_operand *self ATTRIBUTE_UNUSED,
209 const aarch64_opnd_info *info, aarch64_insn *code,
210 const aarch64_inst *inst)
213 /* The opcode dependent area stores the number of elements in
214 each structure to be loaded/stored. */
215 int is_ld1r = get_opcode_dependent_value (inst->opcode) == 1;
218 insert_field (FLD_Rt, code, info->reglist.first_regno, 0);
220 value = (aarch64_insn) 0;
221 if (is_ld1r && info->reglist.num_regs == 2)
222 /* OP_LD1R does not have alternating variant, but have "two consecutive"
224 value = (aarch64_insn) 1;
225 insert_field (FLD_S, code, value, 0);
230 /* Insert Q, opcode<2:1>, S, size and Rt fields for a register element list
231 operand e.g. Vt in AdvSIMD load/store single element instructions. */
233 aarch64_ins_ldst_elemlist (const aarch64_operand *self ATTRIBUTE_UNUSED,
234 const aarch64_opnd_info *info, aarch64_insn *code,
235 const aarch64_inst *inst ATTRIBUTE_UNUSED)
237 aarch64_field field = {0, 0};
238 aarch64_insn QSsize = 0; /* fields Q:S:size. */
239 aarch64_insn opcodeh2 = 0; /* opcode<2:1> */
241 assert (info->reglist.has_index);
244 insert_field (FLD_Rt, code, info->reglist.first_regno, 0);
245 /* Encode the index, opcode<2:1> and size. */
246 switch (info->qualifier)
248 case AARCH64_OPND_QLF_S_B:
249 /* Index encoded in "Q:S:size". */
250 QSsize = info->reglist.index;
253 case AARCH64_OPND_QLF_S_H:
254 /* Index encoded in "Q:S:size<1>". */
255 QSsize = info->reglist.index << 1;
258 case AARCH64_OPND_QLF_S_S:
259 /* Index encoded in "Q:S". */
260 QSsize = info->reglist.index << 2;
263 case AARCH64_OPND_QLF_S_D:
264 /* Index encoded in "Q". */
265 QSsize = info->reglist.index << 3 | 0x1;
271 insert_fields (code, QSsize, 0, 3, FLD_vldst_size, FLD_S, FLD_Q);
272 gen_sub_field (FLD_asisdlso_opcode, 1, 2, &field);
273 insert_field_2 (&field, code, opcodeh2, 0);
278 /* Insert fields immh:immb and/or Q for e.g. the shift immediate in
279 SSHR <Vd>.<T>, <Vn>.<T>, #<shift>
280 or SSHR <V><d>, <V><n>, #<shift>. */
282 aarch64_ins_advsimd_imm_shift (const aarch64_operand *self ATTRIBUTE_UNUSED,
283 const aarch64_opnd_info *info,
284 aarch64_insn *code, const aarch64_inst *inst)
286 unsigned val = aarch64_get_qualifier_standard_value (info->qualifier);
289 if (inst->opcode->iclass == asimdshf)
293 0000 x SEE AdvSIMD modified immediate
302 Q = (val & 0x1) ? 1 : 0;
303 insert_field (FLD_Q, code, Q, inst->opcode->mask);
307 assert (info->type == AARCH64_OPND_IMM_VLSR
308 || info->type == AARCH64_OPND_IMM_VLSL);
310 if (info->type == AARCH64_OPND_IMM_VLSR)
313 0000 SEE AdvSIMD modified immediate
314 0001 (16-UInt(immh:immb))
315 001x (32-UInt(immh:immb))
316 01xx (64-UInt(immh:immb))
317 1xxx (128-UInt(immh:immb)) */
318 imm = (16 << (unsigned)val) - info->imm.value;
322 0000 SEE AdvSIMD modified immediate
323 0001 (UInt(immh:immb)-8)
324 001x (UInt(immh:immb)-16)
325 01xx (UInt(immh:immb)-32)
326 1xxx (UInt(immh:immb)-64) */
327 imm = info->imm.value + (8 << (unsigned)val);
328 insert_fields (code, imm, 0, 2, FLD_immb, FLD_immh);
333 /* Insert fields for e.g. the immediate operands in
334 BFM <Wd>, <Wn>, #<immr>, #<imms>. */
336 aarch64_ins_imm (const aarch64_operand *self, const aarch64_opnd_info *info,
338 const aarch64_inst *inst ATTRIBUTE_UNUSED)
342 imm = info->imm.value;
343 if (operand_need_shift_by_two (self))
345 insert_all_fields (self, code, imm);
349 /* Insert immediate and its shift amount for e.g. the last operand in
350 MOVZ <Wd>, #<imm16>{, LSL #<shift>}. */
352 aarch64_ins_imm_half (const aarch64_operand *self, const aarch64_opnd_info *info,
353 aarch64_insn *code, const aarch64_inst *inst)
356 aarch64_ins_imm (self, info, code, inst);
358 insert_field (FLD_hw, code, info->shifter.amount >> 4, 0);
362 /* Insert cmode and "a:b:c:d:e:f:g:h" fields for e.g. the last operand in
363 MOVI <Vd>.<T>, #<imm8> {, LSL #<amount>}. */
365 aarch64_ins_advsimd_imm_modified (const aarch64_operand *self ATTRIBUTE_UNUSED,
366 const aarch64_opnd_info *info,
368 const aarch64_inst *inst ATTRIBUTE_UNUSED)
370 enum aarch64_opnd_qualifier opnd0_qualifier = inst->operands[0].qualifier;
371 uint64_t imm = info->imm.value;
372 enum aarch64_modifier_kind kind = info->shifter.kind;
373 int amount = info->shifter.amount;
374 aarch64_field field = {0, 0};
376 /* a:b:c:d:e:f:g:h */
377 if (!info->imm.is_fp && aarch64_get_qualifier_esize (opnd0_qualifier) == 8)
379 /* Either MOVI <Dd>, #<imm>
380 or MOVI <Vd>.2D, #<imm>.
381 <imm> is a 64-bit immediate
382 "aaaaaaaabbbbbbbbccccccccddddddddeeeeeeeeffffffffgggggggghhhhhhhh",
383 encoded in "a:b:c:d:e:f:g:h". */
384 imm = aarch64_shrink_expanded_imm8 (imm);
385 assert ((int)imm >= 0);
387 insert_fields (code, imm, 0, 2, FLD_defgh, FLD_abc);
389 if (kind == AARCH64_MOD_NONE)
392 /* shift amount partially in cmode */
393 assert (kind == AARCH64_MOD_LSL || kind == AARCH64_MOD_MSL);
394 if (kind == AARCH64_MOD_LSL)
396 /* AARCH64_MOD_LSL: shift zeros. */
397 int esize = aarch64_get_qualifier_esize (opnd0_qualifier);
398 assert (esize == 4 || esize == 2 || esize == 1);
399 /* For 8-bit move immediate, the optional LSL #0 does not require
405 gen_sub_field (FLD_cmode, 1, 2, &field); /* per word */
407 gen_sub_field (FLD_cmode, 1, 1, &field); /* per halfword */
411 /* AARCH64_MOD_MSL: shift ones. */
413 gen_sub_field (FLD_cmode, 0, 1, &field); /* per word */
415 insert_field_2 (&field, code, amount, 0);
420 /* Insert fields for an 8-bit floating-point immediate. */
422 aarch64_ins_fpimm (const aarch64_operand *self, const aarch64_opnd_info *info,
424 const aarch64_inst *inst ATTRIBUTE_UNUSED)
426 insert_all_fields (self, code, info->imm.value);
430 /* Insert #<fbits> for the immediate operand in fp fix-point instructions,
431 e.g. SCVTF <Dd>, <Wn>, #<fbits>. */
433 aarch64_ins_fbits (const aarch64_operand *self, const aarch64_opnd_info *info,
435 const aarch64_inst *inst ATTRIBUTE_UNUSED)
437 insert_field (self->fields[0], code, 64 - info->imm.value, 0);
441 /* Insert arithmetic immediate for e.g. the last operand in
442 SUBS <Wd>, <Wn|WSP>, #<imm> {, <shift>}. */
444 aarch64_ins_aimm (const aarch64_operand *self, const aarch64_opnd_info *info,
445 aarch64_insn *code, const aarch64_inst *inst ATTRIBUTE_UNUSED)
448 aarch64_insn value = info->shifter.amount ? 1 : 0;
449 insert_field (self->fields[0], code, value, 0);
450 /* imm12 (unsigned) */
451 insert_field (self->fields[1], code, info->imm.value, 0);
455 /* Common routine shared by aarch64_ins{,_inv}_limm. INVERT_P says whether
456 the operand should be inverted before encoding. */
458 aarch64_ins_limm_1 (const aarch64_operand *self,
459 const aarch64_opnd_info *info, aarch64_insn *code,
460 const aarch64_inst *inst, bfd_boolean invert_p)
463 uint64_t imm = info->imm.value;
464 int esize = aarch64_get_qualifier_esize (inst->operands[0].qualifier);
468 if (aarch64_logical_immediate_p (imm, esize, &value) == FALSE)
469 /* The constraint check should have guaranteed this wouldn't happen. */
472 insert_fields (code, value, 0, 3, self->fields[2], self->fields[1],
477 /* Insert logical/bitmask immediate for e.g. the last operand in
478 ORR <Wd|WSP>, <Wn>, #<imm>. */
480 aarch64_ins_limm (const aarch64_operand *self, const aarch64_opnd_info *info,
481 aarch64_insn *code, const aarch64_inst *inst)
483 return aarch64_ins_limm_1 (self, info, code, inst,
484 inst->opcode->op == OP_BIC);
487 /* Insert a logical/bitmask immediate for the BIC alias of AND (etc.). */
489 aarch64_ins_inv_limm (const aarch64_operand *self,
490 const aarch64_opnd_info *info, aarch64_insn *code,
491 const aarch64_inst *inst)
493 return aarch64_ins_limm_1 (self, info, code, inst, TRUE);
496 /* Encode Ft for e.g. STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]
497 or LDP <Qt1>, <Qt2>, [<Xn|SP>], #<imm>. */
499 aarch64_ins_ft (const aarch64_operand *self, const aarch64_opnd_info *info,
500 aarch64_insn *code, const aarch64_inst *inst)
502 aarch64_insn value = 0;
504 assert (info->idx == 0);
507 aarch64_ins_regno (self, info, code, inst);
508 if (inst->opcode->iclass == ldstpair_indexed
509 || inst->opcode->iclass == ldstnapair_offs
510 || inst->opcode->iclass == ldstpair_off
511 || inst->opcode->iclass == loadlit)
514 switch (info->qualifier)
516 case AARCH64_OPND_QLF_S_S: value = 0; break;
517 case AARCH64_OPND_QLF_S_D: value = 1; break;
518 case AARCH64_OPND_QLF_S_Q: value = 2; break;
521 insert_field (FLD_ldst_size, code, value, 0);
526 value = aarch64_get_qualifier_standard_value (info->qualifier);
527 insert_fields (code, value, 0, 2, FLD_ldst_size, FLD_opc1);
533 /* Encode the address operand for e.g. STXRB <Ws>, <Wt>, [<Xn|SP>{,#0}]. */
535 aarch64_ins_addr_simple (const aarch64_operand *self ATTRIBUTE_UNUSED,
536 const aarch64_opnd_info *info, aarch64_insn *code,
537 const aarch64_inst *inst ATTRIBUTE_UNUSED)
540 insert_field (FLD_Rn, code, info->addr.base_regno, 0);
544 /* Encode the address operand for e.g.
545 STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */
547 aarch64_ins_addr_regoff (const aarch64_operand *self ATTRIBUTE_UNUSED,
548 const aarch64_opnd_info *info, aarch64_insn *code,
549 const aarch64_inst *inst ATTRIBUTE_UNUSED)
552 enum aarch64_modifier_kind kind = info->shifter.kind;
555 insert_field (FLD_Rn, code, info->addr.base_regno, 0);
557 insert_field (FLD_Rm, code, info->addr.offset.regno, 0);
559 if (kind == AARCH64_MOD_LSL)
560 kind = AARCH64_MOD_UXTX; /* Trick to enable the table-driven. */
561 insert_field (FLD_option, code, aarch64_get_operand_modifier_value (kind), 0);
563 if (info->qualifier != AARCH64_OPND_QLF_S_B)
564 S = info->shifter.amount != 0;
566 /* For STR <Bt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}},
570 Must be #0 if <extend> is explicitly LSL. */
571 S = info->shifter.operator_present && info->shifter.amount_present;
572 insert_field (FLD_S, code, S, 0);
577 /* Encode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>, #<simm>]!. */
579 aarch64_ins_addr_simm (const aarch64_operand *self,
580 const aarch64_opnd_info *info,
582 const aarch64_inst *inst ATTRIBUTE_UNUSED)
587 insert_field (FLD_Rn, code, info->addr.base_regno, 0);
588 /* simm (imm9 or imm7) */
589 imm = info->addr.offset.imm;
590 if (self->fields[0] == FLD_imm7)
591 /* scaled immediate in ld/st pair instructions.. */
592 imm >>= get_logsz (aarch64_get_qualifier_esize (info->qualifier));
593 insert_field (self->fields[0], code, imm, 0);
594 /* pre/post- index */
595 if (info->addr.writeback)
597 assert (inst->opcode->iclass != ldst_unscaled
598 && inst->opcode->iclass != ldstnapair_offs
599 && inst->opcode->iclass != ldstpair_off
600 && inst->opcode->iclass != ldst_unpriv);
601 assert (info->addr.preind != info->addr.postind);
602 if (info->addr.preind)
603 insert_field (self->fields[1], code, 1, 0);
609 /* Encode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>{, #<pimm>}]. */
611 aarch64_ins_addr_uimm12 (const aarch64_operand *self,
612 const aarch64_opnd_info *info,
614 const aarch64_inst *inst ATTRIBUTE_UNUSED)
616 int shift = get_logsz (aarch64_get_qualifier_esize (info->qualifier));
619 insert_field (self->fields[0], code, info->addr.base_regno, 0);
621 insert_field (self->fields[1], code,info->addr.offset.imm >> shift, 0);
625 /* Encode the address operand for e.g.
626 LD1 {<Vt>.<T>, <Vt2>.<T>, <Vt3>.<T>}, [<Xn|SP>], <Xm|#<amount>>. */
628 aarch64_ins_simd_addr_post (const aarch64_operand *self ATTRIBUTE_UNUSED,
629 const aarch64_opnd_info *info, aarch64_insn *code,
630 const aarch64_inst *inst ATTRIBUTE_UNUSED)
633 insert_field (FLD_Rn, code, info->addr.base_regno, 0);
635 if (info->addr.offset.is_reg)
636 insert_field (FLD_Rm, code, info->addr.offset.regno, 0);
638 insert_field (FLD_Rm, code, 0x1f, 0);
642 /* Encode the condition operand for e.g. CSEL <Xd>, <Xn>, <Xm>, <cond>. */
644 aarch64_ins_cond (const aarch64_operand *self ATTRIBUTE_UNUSED,
645 const aarch64_opnd_info *info, aarch64_insn *code,
646 const aarch64_inst *inst ATTRIBUTE_UNUSED)
649 insert_field (FLD_cond, code, info->cond->value, 0);
653 /* Encode the system register operand for e.g. MRS <Xt>, <systemreg>. */
655 aarch64_ins_sysreg (const aarch64_operand *self ATTRIBUTE_UNUSED,
656 const aarch64_opnd_info *info, aarch64_insn *code,
657 const aarch64_inst *inst ATTRIBUTE_UNUSED)
659 /* op0:op1:CRn:CRm:op2 */
660 insert_fields (code, info->sysreg, inst->opcode->mask, 5,
661 FLD_op2, FLD_CRm, FLD_CRn, FLD_op1, FLD_op0);
665 /* Encode the PSTATE field operand for e.g. MSR <pstatefield>, #<imm>. */
667 aarch64_ins_pstatefield (const aarch64_operand *self ATTRIBUTE_UNUSED,
668 const aarch64_opnd_info *info, aarch64_insn *code,
669 const aarch64_inst *inst ATTRIBUTE_UNUSED)
672 insert_fields (code, info->pstatefield, inst->opcode->mask, 2,
677 /* Encode the system instruction op operand for e.g. AT <at_op>, <Xt>. */
679 aarch64_ins_sysins_op (const aarch64_operand *self ATTRIBUTE_UNUSED,
680 const aarch64_opnd_info *info, aarch64_insn *code,
681 const aarch64_inst *inst ATTRIBUTE_UNUSED)
683 /* op1:CRn:CRm:op2 */
684 insert_fields (code, info->sysins_op->value, inst->opcode->mask, 4,
685 FLD_op2, FLD_CRm, FLD_CRn, FLD_op1);
689 /* Encode the memory barrier option operand for e.g. DMB <option>|#<imm>. */
692 aarch64_ins_barrier (const aarch64_operand *self ATTRIBUTE_UNUSED,
693 const aarch64_opnd_info *info, aarch64_insn *code,
694 const aarch64_inst *inst ATTRIBUTE_UNUSED)
697 insert_field (FLD_CRm, code, info->barrier->value, 0);
701 /* Encode the prefetch operation option operand for e.g.
702 PRFM <prfop>, [<Xn|SP>{, #<pimm>}]. */
705 aarch64_ins_prfop (const aarch64_operand *self ATTRIBUTE_UNUSED,
706 const aarch64_opnd_info *info, aarch64_insn *code,
707 const aarch64_inst *inst ATTRIBUTE_UNUSED)
710 insert_field (FLD_Rt, code, info->prfop->value, 0);
714 /* Encode the hint number for instructions that alias HINT but take an
718 aarch64_ins_hint (const aarch64_operand *self ATTRIBUTE_UNUSED,
719 const aarch64_opnd_info *info, aarch64_insn *code,
720 const aarch64_inst *inst ATTRIBUTE_UNUSED)
723 insert_fields (code, info->hint_option->value, 0, 2, FLD_op2, FLD_CRm);
727 /* Encode the extended register operand for e.g.
728 STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */
730 aarch64_ins_reg_extended (const aarch64_operand *self ATTRIBUTE_UNUSED,
731 const aarch64_opnd_info *info, aarch64_insn *code,
732 const aarch64_inst *inst ATTRIBUTE_UNUSED)
734 enum aarch64_modifier_kind kind;
737 insert_field (FLD_Rm, code, info->reg.regno, 0);
739 kind = info->shifter.kind;
740 if (kind == AARCH64_MOD_LSL)
741 kind = info->qualifier == AARCH64_OPND_QLF_W
742 ? AARCH64_MOD_UXTW : AARCH64_MOD_UXTX;
743 insert_field (FLD_option, code, aarch64_get_operand_modifier_value (kind), 0);
745 insert_field (FLD_imm3, code, info->shifter.amount, 0);
750 /* Encode the shifted register operand for e.g.
751 SUBS <Xd>, <Xn>, <Xm> {, <shift> #<amount>}. */
753 aarch64_ins_reg_shifted (const aarch64_operand *self ATTRIBUTE_UNUSED,
754 const aarch64_opnd_info *info, aarch64_insn *code,
755 const aarch64_inst *inst ATTRIBUTE_UNUSED)
758 insert_field (FLD_Rm, code, info->reg.regno, 0);
760 insert_field (FLD_shift, code,
761 aarch64_get_operand_modifier_value (info->shifter.kind), 0);
763 insert_field (FLD_imm6, code, info->shifter.amount, 0);
768 /* Encode an SVE address [<base>, #<simm4>*<factor>, MUL VL],
769 where <simm4> is a 4-bit signed value and where <factor> is 1 plus
770 SELF's operand-dependent value. fields[0] specifies the field that
771 holds <base>. <simm4> is encoded in the SVE_imm4 field. */
773 aarch64_ins_sve_addr_ri_s4xvl (const aarch64_operand *self,
774 const aarch64_opnd_info *info,
776 const aarch64_inst *inst ATTRIBUTE_UNUSED)
778 int factor = 1 + get_operand_specific_data (self);
779 insert_field (self->fields[0], code, info->addr.base_regno, 0);
780 insert_field (FLD_SVE_imm4, code, info->addr.offset.imm / factor, 0);
784 /* Encode an SVE address [<base>, #<simm6>*<factor>, MUL VL],
785 where <simm6> is a 6-bit signed value and where <factor> is 1 plus
786 SELF's operand-dependent value. fields[0] specifies the field that
787 holds <base>. <simm6> is encoded in the SVE_imm6 field. */
789 aarch64_ins_sve_addr_ri_s6xvl (const aarch64_operand *self,
790 const aarch64_opnd_info *info,
792 const aarch64_inst *inst ATTRIBUTE_UNUSED)
794 int factor = 1 + get_operand_specific_data (self);
795 insert_field (self->fields[0], code, info->addr.base_regno, 0);
796 insert_field (FLD_SVE_imm6, code, info->addr.offset.imm / factor, 0);
800 /* Encode an SVE address [<base>, #<simm9>*<factor>, MUL VL],
801 where <simm9> is a 9-bit signed value and where <factor> is 1 plus
802 SELF's operand-dependent value. fields[0] specifies the field that
803 holds <base>. <simm9> is encoded in the concatenation of the SVE_imm6
804 and imm3 fields, with imm3 being the less-significant part. */
806 aarch64_ins_sve_addr_ri_s9xvl (const aarch64_operand *self,
807 const aarch64_opnd_info *info,
809 const aarch64_inst *inst ATTRIBUTE_UNUSED)
811 int factor = 1 + get_operand_specific_data (self);
812 insert_field (self->fields[0], code, info->addr.base_regno, 0);
813 insert_fields (code, info->addr.offset.imm / factor, 0,
814 2, FLD_imm3, FLD_SVE_imm6);
818 /* Encode an SVE address [X<n>, #<SVE_imm6> << <shift>], where <SVE_imm6>
819 is a 6-bit unsigned number and where <shift> is SELF's operand-dependent
820 value. fields[0] specifies the base register field. */
822 aarch64_ins_sve_addr_ri_u6 (const aarch64_operand *self,
823 const aarch64_opnd_info *info, aarch64_insn *code,
824 const aarch64_inst *inst ATTRIBUTE_UNUSED)
826 int factor = 1 << get_operand_specific_data (self);
827 insert_field (self->fields[0], code, info->addr.base_regno, 0);
828 insert_field (FLD_SVE_imm6, code, info->addr.offset.imm / factor, 0);
832 /* Encode an SVE address [X<n>, X<m>{, LSL #<shift>}], where <shift>
833 is SELF's operand-dependent value. fields[0] specifies the base
834 register field and fields[1] specifies the offset register field. */
836 aarch64_ins_sve_addr_rr_lsl (const aarch64_operand *self,
837 const aarch64_opnd_info *info, aarch64_insn *code,
838 const aarch64_inst *inst ATTRIBUTE_UNUSED)
840 insert_field (self->fields[0], code, info->addr.base_regno, 0);
841 insert_field (self->fields[1], code, info->addr.offset.regno, 0);
845 /* Encode an SVE address [X<n>, Z<m>.<T>, (S|U)XTW {#<shift>}], where
846 <shift> is SELF's operand-dependent value. fields[0] specifies the
847 base register field, fields[1] specifies the offset register field and
848 fields[2] is a single-bit field that selects SXTW over UXTW. */
850 aarch64_ins_sve_addr_rz_xtw (const aarch64_operand *self,
851 const aarch64_opnd_info *info, aarch64_insn *code,
852 const aarch64_inst *inst ATTRIBUTE_UNUSED)
854 insert_field (self->fields[0], code, info->addr.base_regno, 0);
855 insert_field (self->fields[1], code, info->addr.offset.regno, 0);
856 if (info->shifter.kind == AARCH64_MOD_UXTW)
857 insert_field (self->fields[2], code, 0, 0);
859 insert_field (self->fields[2], code, 1, 0);
863 /* Encode an SVE address [Z<n>.<T>, #<imm5> << <shift>], where <imm5> is a
864 5-bit unsigned number and where <shift> is SELF's operand-dependent value.
865 fields[0] specifies the base register field. */
867 aarch64_ins_sve_addr_zi_u5 (const aarch64_operand *self,
868 const aarch64_opnd_info *info, aarch64_insn *code,
869 const aarch64_inst *inst ATTRIBUTE_UNUSED)
871 int factor = 1 << get_operand_specific_data (self);
872 insert_field (self->fields[0], code, info->addr.base_regno, 0);
873 insert_field (FLD_imm5, code, info->addr.offset.imm / factor, 0);
877 /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>{, <modifier> {#<msz>}}],
878 where <modifier> is fixed by the instruction and where <msz> is a
879 2-bit unsigned number. fields[0] specifies the base register field
880 and fields[1] specifies the offset register field. */
882 aarch64_ext_sve_addr_zz (const aarch64_operand *self,
883 const aarch64_opnd_info *info, aarch64_insn *code)
885 insert_field (self->fields[0], code, info->addr.base_regno, 0);
886 insert_field (self->fields[1], code, info->addr.offset.regno, 0);
887 insert_field (FLD_SVE_msz, code, info->shifter.amount, 0);
891 /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>{, LSL #<msz>}], where
892 <msz> is a 2-bit unsigned number. fields[0] specifies the base register
893 field and fields[1] specifies the offset register field. */
895 aarch64_ins_sve_addr_zz_lsl (const aarch64_operand *self,
896 const aarch64_opnd_info *info, aarch64_insn *code,
897 const aarch64_inst *inst ATTRIBUTE_UNUSED)
899 return aarch64_ext_sve_addr_zz (self, info, code);
902 /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>, SXTW {#<msz>}], where
903 <msz> is a 2-bit unsigned number. fields[0] specifies the base register
904 field and fields[1] specifies the offset register field. */
906 aarch64_ins_sve_addr_zz_sxtw (const aarch64_operand *self,
907 const aarch64_opnd_info *info,
909 const aarch64_inst *inst ATTRIBUTE_UNUSED)
911 return aarch64_ext_sve_addr_zz (self, info, code);
914 /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>, UXTW {#<msz>}], where
915 <msz> is a 2-bit unsigned number. fields[0] specifies the base register
916 field and fields[1] specifies the offset register field. */
918 aarch64_ins_sve_addr_zz_uxtw (const aarch64_operand *self,
919 const aarch64_opnd_info *info,
921 const aarch64_inst *inst ATTRIBUTE_UNUSED)
923 return aarch64_ext_sve_addr_zz (self, info, code);
926 /* Encode an SVE ADD/SUB immediate. */
928 aarch64_ins_sve_aimm (const aarch64_operand *self,
929 const aarch64_opnd_info *info, aarch64_insn *code,
930 const aarch64_inst *inst ATTRIBUTE_UNUSED)
932 if (info->shifter.amount == 8)
933 insert_all_fields (self, code, (info->imm.value & 0xff) | 256);
934 else if (info->imm.value != 0 && (info->imm.value & 0xff) == 0)
935 insert_all_fields (self, code, ((info->imm.value / 256) & 0xff) | 256);
937 insert_all_fields (self, code, info->imm.value & 0xff);
941 /* Encode an SVE CPY/DUP immediate. */
943 aarch64_ins_sve_asimm (const aarch64_operand *self,
944 const aarch64_opnd_info *info, aarch64_insn *code,
945 const aarch64_inst *inst)
947 return aarch64_ins_sve_aimm (self, info, code, inst);
950 /* Encode Zn[MM], where MM has a 7-bit triangular encoding. The fields
951 array specifies which field to use for Zn. MM is encoded in the
952 concatenation of imm5 and SVE_tszh, with imm5 being the less
955 aarch64_ins_sve_index (const aarch64_operand *self,
956 const aarch64_opnd_info *info, aarch64_insn *code,
957 const aarch64_inst *inst ATTRIBUTE_UNUSED)
959 unsigned int esize = aarch64_get_qualifier_esize (info->qualifier);
960 insert_field (self->fields[0], code, info->reglane.regno, 0);
961 insert_fields (code, (info->reglane.index * 2 + 1) * esize, 0,
962 2, FLD_imm5, FLD_SVE_tszh);
966 /* Encode a logical/bitmask immediate for the MOV alias of SVE DUPM. */
968 aarch64_ins_sve_limm_mov (const aarch64_operand *self,
969 const aarch64_opnd_info *info, aarch64_insn *code,
970 const aarch64_inst *inst)
972 return aarch64_ins_limm (self, info, code, inst);
975 /* Encode {Zn.<T> - Zm.<T>}. The fields array specifies which field
978 aarch64_ins_sve_reglist (const aarch64_operand *self,
979 const aarch64_opnd_info *info, aarch64_insn *code,
980 const aarch64_inst *inst ATTRIBUTE_UNUSED)
982 insert_field (self->fields[0], code, info->reglist.first_regno, 0);
986 /* Encode <pattern>{, MUL #<amount>}. The fields array specifies which
987 fields to use for <pattern>. <amount> - 1 is encoded in the SVE_imm4
990 aarch64_ins_sve_scale (const aarch64_operand *self,
991 const aarch64_opnd_info *info, aarch64_insn *code,
992 const aarch64_inst *inst ATTRIBUTE_UNUSED)
994 insert_all_fields (self, code, info->imm.value);
995 insert_field (FLD_SVE_imm4, code, info->shifter.amount - 1, 0);
999 /* Encode an SVE shift left immediate. */
1001 aarch64_ins_sve_shlimm (const aarch64_operand *self,
1002 const aarch64_opnd_info *info, aarch64_insn *code,
1003 const aarch64_inst *inst)
1005 const aarch64_opnd_info *prev_operand;
1008 assert (info->idx > 0);
1009 prev_operand = &inst->operands[info->idx - 1];
1010 esize = aarch64_get_qualifier_esize (prev_operand->qualifier);
1011 insert_all_fields (self, code, 8 * esize + info->imm.value);
1015 /* Encode an SVE shift right immediate. */
1017 aarch64_ins_sve_shrimm (const aarch64_operand *self,
1018 const aarch64_opnd_info *info, aarch64_insn *code,
1019 const aarch64_inst *inst)
1021 const aarch64_opnd_info *prev_operand;
1024 assert (info->idx > 0);
1025 prev_operand = &inst->operands[info->idx - 1];
1026 esize = aarch64_get_qualifier_esize (prev_operand->qualifier);
1027 insert_all_fields (self, code, 16 * esize - info->imm.value);
1031 /* Encode a single-bit immediate that selects between #0.5 and #1.0.
1032 The fields array specifies which field to use. */
1034 aarch64_ins_sve_float_half_one (const aarch64_operand *self,
1035 const aarch64_opnd_info *info,
1037 const aarch64_inst *inst ATTRIBUTE_UNUSED)
1039 if (info->imm.value == 0x3f000000)
1040 insert_field (self->fields[0], code, 0, 0);
1042 insert_field (self->fields[0], code, 1, 0);
1046 /* Encode a single-bit immediate that selects between #0.5 and #2.0.
1047 The fields array specifies which field to use. */
1049 aarch64_ins_sve_float_half_two (const aarch64_operand *self,
1050 const aarch64_opnd_info *info,
1052 const aarch64_inst *inst ATTRIBUTE_UNUSED)
1054 if (info->imm.value == 0x3f000000)
1055 insert_field (self->fields[0], code, 0, 0);
1057 insert_field (self->fields[0], code, 1, 0);
1061 /* Encode a single-bit immediate that selects between #0.0 and #1.0.
1062 The fields array specifies which field to use. */
1064 aarch64_ins_sve_float_zero_one (const aarch64_operand *self,
1065 const aarch64_opnd_info *info,
1067 const aarch64_inst *inst ATTRIBUTE_UNUSED)
1069 if (info->imm.value == 0)
1070 insert_field (self->fields[0], code, 0, 0);
1072 insert_field (self->fields[0], code, 1, 0);
1076 /* Miscellaneous encoding functions. */
1078 /* Encode size[0], i.e. bit 22, for
1079 e.g. FCVTN<Q> <Vd>.<Tb>, <Vn>.<Ta>. */
1082 encode_asimd_fcvt (aarch64_inst *inst)
1085 aarch64_field field = {0, 0};
1086 enum aarch64_opnd_qualifier qualifier;
1088 switch (inst->opcode->op)
1092 /* FCVTN<Q> <Vd>.<Tb>, <Vn>.<Ta>. */
1093 qualifier = inst->operands[1].qualifier;
1097 /* FCVTL<Q> <Vd>.<Ta>, <Vn>.<Tb>. */
1098 qualifier = inst->operands[0].qualifier;
1103 assert (qualifier == AARCH64_OPND_QLF_V_4S
1104 || qualifier == AARCH64_OPND_QLF_V_2D);
1105 value = (qualifier == AARCH64_OPND_QLF_V_4S) ? 0 : 1;
1106 gen_sub_field (FLD_size, 0, 1, &field);
1107 insert_field_2 (&field, &inst->value, value, 0);
1110 /* Encode size[0], i.e. bit 22, for
1111 e.g. FCVTXN <Vb><d>, <Va><n>. */
1114 encode_asisd_fcvtxn (aarch64_inst *inst)
1116 aarch64_insn val = 1;
1117 aarch64_field field = {0, 0};
1118 assert (inst->operands[0].qualifier == AARCH64_OPND_QLF_S_S);
1119 gen_sub_field (FLD_size, 0, 1, &field);
1120 insert_field_2 (&field, &inst->value, val, 0);
1123 /* Encode the 'opc' field for e.g. FCVT <Dd>, <Sn>. */
1125 encode_fcvt (aarch64_inst *inst)
1128 const aarch64_field field = {15, 2};
1131 switch (inst->operands[0].qualifier)
1133 case AARCH64_OPND_QLF_S_S: val = 0; break;
1134 case AARCH64_OPND_QLF_S_D: val = 1; break;
1135 case AARCH64_OPND_QLF_S_H: val = 3; break;
1138 insert_field_2 (&field, &inst->value, val, 0);
1143 /* Return the index in qualifiers_list that INST is using. Should only
1144 be called once the qualifiers are known to be valid. */
1147 aarch64_get_variant (struct aarch64_inst *inst)
1149 int i, nops, variant;
1151 nops = aarch64_num_of_operands (inst->opcode);
1152 for (variant = 0; variant < AARCH64_MAX_QLF_SEQ_NUM; ++variant)
1154 for (i = 0; i < nops; ++i)
1155 if (inst->opcode->qualifiers_list[variant][i]
1156 != inst->operands[i].qualifier)
1164 /* Do miscellaneous encodings that are not common enough to be driven by
1168 do_misc_encoding (aarch64_inst *inst)
1172 switch (inst->opcode->op)
1181 encode_asimd_fcvt (inst);
1184 encode_asisd_fcvtxn (inst);
1188 /* Copy Pn to Pm and Pg. */
1189 value = extract_field (FLD_SVE_Pn, inst->value, 0);
1190 insert_field (FLD_SVE_Pm, &inst->value, value, 0);
1191 insert_field (FLD_SVE_Pg4_10, &inst->value, value, 0);
1194 /* Copy Zd to Zm. */
1195 value = extract_field (FLD_SVE_Zd, inst->value, 0);
1196 insert_field (FLD_SVE_Zm_16, &inst->value, value, 0);
1199 /* Fill in the zero immediate. */
1200 insert_field (FLD_SVE_tsz, &inst->value,
1201 1 << aarch64_get_variant (inst), 0);
1204 /* Copy Zn to Zm. */
1205 value = extract_field (FLD_SVE_Zn, inst->value, 0);
1206 insert_field (FLD_SVE_Zm_16, &inst->value, value, 0);
1211 /* Copy Pd to Pm. */
1212 value = extract_field (FLD_SVE_Pd, inst->value, 0);
1213 insert_field (FLD_SVE_Pm, &inst->value, value, 0);
1215 case OP_MOVZS_P_P_P:
1217 /* Copy Pn to Pm. */
1218 value = extract_field (FLD_SVE_Pn, inst->value, 0);
1219 insert_field (FLD_SVE_Pm, &inst->value, value, 0);
1221 case OP_NOTS_P_P_P_Z:
1222 case OP_NOT_P_P_P_Z:
1223 /* Copy Pg to Pm. */
1224 value = extract_field (FLD_SVE_Pg4_10, inst->value, 0);
1225 insert_field (FLD_SVE_Pm, &inst->value, value, 0);
1231 /* Encode the 'size' and 'Q' field for e.g. SHADD. */
1233 encode_sizeq (aarch64_inst *inst)
1236 enum aarch64_field_kind kind;
1239 /* Get the index of the operand whose information we are going to use
1240 to encode the size and Q fields.
1241 This is deduced from the possible valid qualifier lists. */
1242 idx = aarch64_select_operand_for_sizeq_field_coding (inst->opcode);
1243 DEBUG_TRACE ("idx: %d; qualifier: %s", idx,
1244 aarch64_get_qualifier_name (inst->operands[idx].qualifier));
1245 sizeq = aarch64_get_qualifier_standard_value (inst->operands[idx].qualifier);
1247 insert_field (FLD_Q, &inst->value, sizeq & 0x1, inst->opcode->mask);
1249 if (inst->opcode->iclass == asisdlse
1250 || inst->opcode->iclass == asisdlsep
1251 || inst->opcode->iclass == asisdlso
1252 || inst->opcode->iclass == asisdlsop)
1253 kind = FLD_vldst_size;
1256 insert_field (kind, &inst->value, (sizeq >> 1) & 0x3, inst->opcode->mask);
1259 /* Opcodes that have fields shared by multiple operands are usually flagged
1260 with flags. In this function, we detect such flags and use the
1261 information in one of the related operands to do the encoding. The 'one'
1262 operand is not any operand but one of the operands that has the enough
1263 information for such an encoding. */
1266 do_special_encoding (struct aarch64_inst *inst)
1269 aarch64_insn value = 0;
1271 DEBUG_TRACE ("enter with coding 0x%x", (uint32_t) inst->value);
1273 /* Condition for truly conditional executed instructions, e.g. b.cond. */
1274 if (inst->opcode->flags & F_COND)
1276 insert_field (FLD_cond2, &inst->value, inst->cond->value, 0);
1278 if (inst->opcode->flags & F_SF)
1280 idx = select_operand_for_sf_field_coding (inst->opcode);
1281 value = (inst->operands[idx].qualifier == AARCH64_OPND_QLF_X
1282 || inst->operands[idx].qualifier == AARCH64_OPND_QLF_SP)
1284 insert_field (FLD_sf, &inst->value, value, 0);
1285 if (inst->opcode->flags & F_N)
1286 insert_field (FLD_N, &inst->value, value, inst->opcode->mask);
1288 if (inst->opcode->flags & F_LSE_SZ)
1290 idx = select_operand_for_sf_field_coding (inst->opcode);
1291 value = (inst->operands[idx].qualifier == AARCH64_OPND_QLF_X
1292 || inst->operands[idx].qualifier == AARCH64_OPND_QLF_SP)
1294 insert_field (FLD_lse_sz, &inst->value, value, 0);
1296 if (inst->opcode->flags & F_SIZEQ)
1297 encode_sizeq (inst);
1298 if (inst->opcode->flags & F_FPTYPE)
1300 idx = select_operand_for_fptype_field_coding (inst->opcode);
1301 switch (inst->operands[idx].qualifier)
1303 case AARCH64_OPND_QLF_S_S: value = 0; break;
1304 case AARCH64_OPND_QLF_S_D: value = 1; break;
1305 case AARCH64_OPND_QLF_S_H: value = 3; break;
1306 default: assert (0);
1308 insert_field (FLD_type, &inst->value, value, 0);
1310 if (inst->opcode->flags & F_SSIZE)
1312 enum aarch64_opnd_qualifier qualifier;
1313 idx = select_operand_for_scalar_size_field_coding (inst->opcode);
1314 qualifier = inst->operands[idx].qualifier;
1315 assert (qualifier >= AARCH64_OPND_QLF_S_B
1316 && qualifier <= AARCH64_OPND_QLF_S_Q);
1317 value = aarch64_get_qualifier_standard_value (qualifier);
1318 insert_field (FLD_size, &inst->value, value, inst->opcode->mask);
1320 if (inst->opcode->flags & F_T)
1322 int num; /* num of consecutive '0's on the right side of imm5<3:0>. */
1323 aarch64_field field = {0, 0};
1324 enum aarch64_opnd_qualifier qualifier;
1327 qualifier = inst->operands[idx].qualifier;
1328 assert (aarch64_get_operand_class (inst->opcode->operands[0])
1329 == AARCH64_OPND_CLASS_SIMD_REG
1330 && qualifier >= AARCH64_OPND_QLF_V_8B
1331 && qualifier <= AARCH64_OPND_QLF_V_2D);
1342 value = aarch64_get_qualifier_standard_value (qualifier);
1343 insert_field (FLD_Q, &inst->value, value & 0x1, inst->opcode->mask);
1344 num = (int) value >> 1;
1345 assert (num >= 0 && num <= 3);
1346 gen_sub_field (FLD_imm5, 0, num + 1, &field);
1347 insert_field_2 (&field, &inst->value, 1 << num, inst->opcode->mask);
1349 if (inst->opcode->flags & F_GPRSIZE_IN_Q)
1351 /* Use Rt to encode in the case of e.g.
1352 STXP <Ws>, <Xt1>, <Xt2>, [<Xn|SP>{,#0}]. */
1353 enum aarch64_opnd_qualifier qualifier;
1354 idx = aarch64_operand_index (inst->opcode->operands, AARCH64_OPND_Rt);
1356 /* Otherwise use the result operand, which has to be a integer
1359 assert (idx == 0 || idx == 1);
1360 assert (aarch64_get_operand_class (inst->opcode->operands[idx])
1361 == AARCH64_OPND_CLASS_INT_REG);
1362 qualifier = inst->operands[idx].qualifier;
1363 insert_field (FLD_Q, &inst->value,
1364 aarch64_get_qualifier_standard_value (qualifier), 0);
1366 if (inst->opcode->flags & F_LDS_SIZE)
1368 /* e.g. LDRSB <Wt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */
1369 enum aarch64_opnd_qualifier qualifier;
1370 aarch64_field field = {0, 0};
1371 assert (aarch64_get_operand_class (inst->opcode->operands[0])
1372 == AARCH64_OPND_CLASS_INT_REG);
1373 gen_sub_field (FLD_opc, 0, 1, &field);
1374 qualifier = inst->operands[0].qualifier;
1375 insert_field_2 (&field, &inst->value,
1376 1 - aarch64_get_qualifier_standard_value (qualifier), 0);
1378 /* Miscellaneous encoding as the last step. */
1379 if (inst->opcode->flags & F_MISC)
1380 do_misc_encoding (inst);
1382 DEBUG_TRACE ("exit with coding 0x%x", (uint32_t) inst->value);
1385 /* Some instructions (including all SVE ones) use the instruction class
1386 to describe how a qualifiers_list index is represented in the instruction
1387 encoding. If INST is such an instruction, encode the chosen qualifier
1391 aarch64_encode_variant_using_iclass (struct aarch64_inst *inst)
1393 switch (inst->opcode->iclass)
1396 insert_fields (&inst->value, aarch64_get_variant (inst),
1397 0, 2, FLD_SVE_M_14, FLD_size);
1401 case sve_shift_pred:
1402 case sve_shift_unpred:
1403 /* For indices and shift amounts, the variant is encoded as
1404 part of the immediate. */
1408 /* For sve_limm, the .B, .H, and .S forms are just a convenience
1409 and depend on the immediate. They don't have a separate
1414 /* sve_misc instructions have only a single variant. */
1418 insert_fields (&inst->value, aarch64_get_variant (inst),
1419 0, 2, FLD_SVE_M_16, FLD_size);
1423 insert_field (FLD_SVE_M_4, &inst->value, aarch64_get_variant (inst), 0);
1428 insert_field (FLD_size, &inst->value, aarch64_get_variant (inst), 0);
1432 insert_field (FLD_size, &inst->value, aarch64_get_variant (inst) + 1, 0);
1436 insert_field (FLD_SVE_sz, &inst->value, aarch64_get_variant (inst), 0);
1444 /* Converters converting an alias opcode instruction to its real form. */
1446 /* ROR <Wd>, <Ws>, #<shift>
1448 EXTR <Wd>, <Ws>, <Ws>, #<shift>. */
1450 convert_ror_to_extr (aarch64_inst *inst)
1452 copy_operand_info (inst, 3, 2);
1453 copy_operand_info (inst, 2, 1);
1456 /* UXTL<Q> <Vd>.<Ta>, <Vn>.<Tb>
1458 USHLL<Q> <Vd>.<Ta>, <Vn>.<Tb>, #0. */
1460 convert_xtl_to_shll (aarch64_inst *inst)
1462 inst->operands[2].qualifier = inst->operands[1].qualifier;
1463 inst->operands[2].imm.value = 0;
1467 LSR <Xd>, <Xn>, #<shift>
1469 UBFM <Xd>, <Xn>, #<shift>, #63. */
1471 convert_sr_to_bfm (aarch64_inst *inst)
1473 inst->operands[3].imm.value =
1474 inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31 ? 31 : 63;
1477 /* Convert MOV to ORR. */
1479 convert_mov_to_orr (aarch64_inst *inst)
1481 /* MOV <Vd>.<T>, <Vn>.<T>
1483 ORR <Vd>.<T>, <Vn>.<T>, <Vn>.<T>. */
1484 copy_operand_info (inst, 2, 1);
1487 /* When <imms> >= <immr>, the instruction written:
1488 SBFX <Xd>, <Xn>, #<lsb>, #<width>
1490 SBFM <Xd>, <Xn>, #<lsb>, #(<lsb>+<width>-1). */
1493 convert_bfx_to_bfm (aarch64_inst *inst)
1497 /* Convert the operand. */
1498 lsb = inst->operands[2].imm.value;
1499 width = inst->operands[3].imm.value;
1500 inst->operands[2].imm.value = lsb;
1501 inst->operands[3].imm.value = lsb + width - 1;
1504 /* When <imms> < <immr>, the instruction written:
1505 SBFIZ <Xd>, <Xn>, #<lsb>, #<width>
1507 SBFM <Xd>, <Xn>, #((64-<lsb>)&0x3f), #(<width>-1). */
1510 convert_bfi_to_bfm (aarch64_inst *inst)
1514 /* Convert the operand. */
1515 lsb = inst->operands[2].imm.value;
1516 width = inst->operands[3].imm.value;
1517 if (inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31)
1519 inst->operands[2].imm.value = (32 - lsb) & 0x1f;
1520 inst->operands[3].imm.value = width - 1;
1524 inst->operands[2].imm.value = (64 - lsb) & 0x3f;
1525 inst->operands[3].imm.value = width - 1;
1529 /* The instruction written:
1530 BFC <Xd>, #<lsb>, #<width>
1532 BFM <Xd>, XZR, #((64-<lsb>)&0x3f), #(<width>-1). */
1535 convert_bfc_to_bfm (aarch64_inst *inst)
1540 copy_operand_info (inst, 3, 2);
1541 copy_operand_info (inst, 2, 1);
1542 copy_operand_info (inst, 2, 0);
1543 inst->operands[1].reg.regno = 0x1f;
1545 /* Convert the immedate operand. */
1546 lsb = inst->operands[2].imm.value;
1547 width = inst->operands[3].imm.value;
1548 if (inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31)
1550 inst->operands[2].imm.value = (32 - lsb) & 0x1f;
1551 inst->operands[3].imm.value = width - 1;
1555 inst->operands[2].imm.value = (64 - lsb) & 0x3f;
1556 inst->operands[3].imm.value = width - 1;
1560 /* The instruction written:
1561 LSL <Xd>, <Xn>, #<shift>
1563 UBFM <Xd>, <Xn>, #((64-<shift>)&0x3f), #(63-<shift>). */
1566 convert_lsl_to_ubfm (aarch64_inst *inst)
1568 int64_t shift = inst->operands[2].imm.value;
1570 if (inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31)
1572 inst->operands[2].imm.value = (32 - shift) & 0x1f;
1573 inst->operands[3].imm.value = 31 - shift;
1577 inst->operands[2].imm.value = (64 - shift) & 0x3f;
1578 inst->operands[3].imm.value = 63 - shift;
1582 /* CINC <Wd>, <Wn>, <cond>
1584 CSINC <Wd>, <Wn>, <Wn>, invert(<cond>). */
1587 convert_to_csel (aarch64_inst *inst)
1589 copy_operand_info (inst, 3, 2);
1590 copy_operand_info (inst, 2, 1);
1591 inst->operands[3].cond = get_inverted_cond (inst->operands[3].cond);
1594 /* CSET <Wd>, <cond>
1596 CSINC <Wd>, WZR, WZR, invert(<cond>). */
1599 convert_cset_to_csinc (aarch64_inst *inst)
1601 copy_operand_info (inst, 3, 1);
1602 copy_operand_info (inst, 2, 0);
1603 copy_operand_info (inst, 1, 0);
1604 inst->operands[1].reg.regno = 0x1f;
1605 inst->operands[2].reg.regno = 0x1f;
1606 inst->operands[3].cond = get_inverted_cond (inst->operands[3].cond);
1611 MOVZ <Wd>, #<imm16>, LSL #<shift>. */
1614 convert_mov_to_movewide (aarch64_inst *inst)
1617 uint32_t shift_amount;
1620 switch (inst->opcode->op)
1622 case OP_MOV_IMM_WIDE:
1623 value = inst->operands[1].imm.value;
1625 case OP_MOV_IMM_WIDEN:
1626 value = ~inst->operands[1].imm.value;
1631 inst->operands[1].type = AARCH64_OPND_HALF;
1632 is32 = inst->operands[0].qualifier == AARCH64_OPND_QLF_W;
1633 if (! aarch64_wide_constant_p (value, is32, &shift_amount))
1634 /* The constraint check should have guaranteed this wouldn't happen. */
1636 value >>= shift_amount;
1638 inst->operands[1].imm.value = value;
1639 inst->operands[1].shifter.kind = AARCH64_MOD_LSL;
1640 inst->operands[1].shifter.amount = shift_amount;
1645 ORR <Wd>, WZR, #<imm>. */
1648 convert_mov_to_movebitmask (aarch64_inst *inst)
1650 copy_operand_info (inst, 2, 1);
1651 inst->operands[1].reg.regno = 0x1f;
1652 inst->operands[1].skip = 0;
1655 /* Some alias opcodes are assembled by being converted to their real-form. */
1658 convert_to_real (aarch64_inst *inst, const aarch64_opcode *real)
1660 const aarch64_opcode *alias = inst->opcode;
1662 if ((alias->flags & F_CONV) == 0)
1663 goto convert_to_real_return;
1669 convert_sr_to_bfm (inst);
1672 convert_lsl_to_ubfm (inst);
1677 convert_to_csel (inst);
1681 convert_cset_to_csinc (inst);
1686 convert_bfx_to_bfm (inst);
1691 convert_bfi_to_bfm (inst);
1694 convert_bfc_to_bfm (inst);
1697 convert_mov_to_orr (inst);
1699 case OP_MOV_IMM_WIDE:
1700 case OP_MOV_IMM_WIDEN:
1701 convert_mov_to_movewide (inst);
1703 case OP_MOV_IMM_LOG:
1704 convert_mov_to_movebitmask (inst);
1707 convert_ror_to_extr (inst);
1713 convert_xtl_to_shll (inst);
1719 convert_to_real_return:
1720 aarch64_replace_opcode (inst, real);
1723 /* Encode *INST_ORI of the opcode code OPCODE.
1724 Return the encoded result in *CODE and if QLF_SEQ is not NULL, return the
1725 matched operand qualifier sequence in *QLF_SEQ. */
1728 aarch64_opcode_encode (const aarch64_opcode *opcode,
1729 const aarch64_inst *inst_ori, aarch64_insn *code,
1730 aarch64_opnd_qualifier_t *qlf_seq,
1731 aarch64_operand_error *mismatch_detail)
1734 const aarch64_opcode *aliased;
1735 aarch64_inst copy, *inst;
1737 DEBUG_TRACE ("enter with %s", opcode->name);
1739 /* Create a copy of *INST_ORI, so that we can do any change we want. */
1743 assert (inst->opcode == NULL || inst->opcode == opcode);
1744 if (inst->opcode == NULL)
1745 inst->opcode = opcode;
1747 /* Constrain the operands.
1748 After passing this, the encoding is guaranteed to succeed. */
1749 if (aarch64_match_operands_constraint (inst, mismatch_detail) == 0)
1751 DEBUG_TRACE ("FAIL since operand constraint not met");
1755 /* Get the base value.
1756 Note: this has to be before the aliasing handling below in order to
1757 get the base value from the alias opcode before we move on to the
1758 aliased opcode for encoding. */
1759 inst->value = opcode->opcode;
1761 /* No need to do anything else if the opcode does not have any operand. */
1762 if (aarch64_num_of_operands (opcode) == 0)
1765 /* Assign operand indexes and check types. Also put the matched
1766 operand qualifiers in *QLF_SEQ to return. */
1767 for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i)
1769 assert (opcode->operands[i] == inst->operands[i].type);
1770 inst->operands[i].idx = i;
1771 if (qlf_seq != NULL)
1772 *qlf_seq = inst->operands[i].qualifier;
1775 aliased = aarch64_find_real_opcode (opcode);
1776 /* If the opcode is an alias and it does not ask for direct encoding by
1777 itself, the instruction will be transformed to the form of real opcode
1778 and the encoding will be carried out using the rules for the aliased
1780 if (aliased != NULL && (opcode->flags & F_CONV))
1782 DEBUG_TRACE ("real opcode '%s' has been found for the alias %s",
1783 aliased->name, opcode->name);
1784 /* Convert the operands to the form of the real opcode. */
1785 convert_to_real (inst, aliased);
1789 aarch64_opnd_info *info = inst->operands;
1791 /* Call the inserter of each operand. */
1792 for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i, ++info)
1794 const aarch64_operand *opnd;
1795 enum aarch64_opnd type = opcode->operands[i];
1796 if (type == AARCH64_OPND_NIL)
1800 DEBUG_TRACE ("skip the incomplete operand %d", i);
1803 opnd = &aarch64_operands[type];
1804 if (operand_has_inserter (opnd))
1805 aarch64_insert_operand (opnd, info, &inst->value, inst);
1808 /* Call opcode encoders indicated by flags. */
1809 if (opcode_has_special_coder (opcode))
1810 do_special_encoding (inst);
1812 /* Possibly use the instruction class to encode the chosen qualifier
1814 aarch64_encode_variant_using_iclass (inst);
1817 DEBUG_TRACE ("exit with %s", opcode->name);
1819 *code = inst->value;