1 /* aarch64-asm.c -- AArch64 assembler support.
2 Copyright (C) 2012-2019 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"
29 /* The unnamed arguments consist of the number of fields and information about
30 these fields where the VALUE will be inserted into CODE. MASK can be zero or
31 the base mask of the opcode.
33 N.B. the fields are required to be in such an order than the least signficant
34 field for VALUE comes the first, e.g. the <index> in
35 SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]
36 is encoded in H:L:M in some cases, the fields H:L:M should be passed in
37 the order of M, L, H. */
40 insert_fields (aarch64_insn *code, aarch64_insn value, aarch64_insn mask, ...)
43 const aarch64_field *field;
44 enum aarch64_field_kind kind;
48 num = va_arg (va, uint32_t);
52 kind = va_arg (va, enum aarch64_field_kind);
53 field = &fields[kind];
54 insert_field (kind, code, value, mask);
55 value >>= field->width;
60 /* Insert a raw field value VALUE into all fields in SELF->fields.
61 The least significant bit goes in the final field. */
64 insert_all_fields (const aarch64_operand *self, aarch64_insn *code,
68 enum aarch64_field_kind kind;
70 for (i = ARRAY_SIZE (self->fields); i-- > 0; )
71 if (self->fields[i] != FLD_NIL)
73 kind = self->fields[i];
74 insert_field (kind, code, value, 0);
75 value >>= fields[kind].width;
79 /* Operand inserters. */
81 /* Insert register number. */
83 aarch64_ins_regno (const aarch64_operand *self, const aarch64_opnd_info *info,
85 const aarch64_inst *inst ATTRIBUTE_UNUSED,
86 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
88 insert_field (self->fields[0], code, info->reg.regno, 0);
92 /* Insert register number, index and/or other data for SIMD register element
93 operand, e.g. the last source operand in
94 SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */
96 aarch64_ins_reglane (const aarch64_operand *self, const aarch64_opnd_info *info,
97 aarch64_insn *code, const aarch64_inst *inst,
98 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
101 insert_field (self->fields[0], code, info->reglane.regno, inst->opcode->mask);
102 /* index and/or type */
103 if (inst->opcode->iclass == asisdone || inst->opcode->iclass == asimdins)
105 int pos = info->qualifier - AARCH64_OPND_QLF_S_B;
106 if (info->type == AARCH64_OPND_En
107 && inst->opcode->operands[0] == AARCH64_OPND_Ed)
109 /* index2 for e.g. INS <Vd>.<Ts>[<index1>], <Vn>.<Ts>[<index2>]. */
110 assert (info->idx == 1); /* Vn */
111 aarch64_insn value = info->reglane.index << pos;
112 insert_field (FLD_imm4, code, value, 0);
116 /* index and type for e.g. DUP <V><d>, <Vn>.<T>[<index>].
123 aarch64_insn value = ((info->reglane.index << 1) | 1) << pos;
124 insert_field (FLD_imm5, code, value, 0);
127 else if (inst->opcode->iclass == dotproduct)
129 unsigned reglane_index = info->reglane.index;
130 switch (info->qualifier)
132 case AARCH64_OPND_QLF_S_4B:
134 assert (reglane_index < 4);
135 insert_fields (code, reglane_index, 0, 2, FLD_L, FLD_H);
141 else if (inst->opcode->iclass == cryptosm3)
143 /* index for e.g. SM3TT2A <Vd>.4S, <Vn>.4S, <Vm>S[<imm2>]. */
144 unsigned reglane_index = info->reglane.index;
145 assert (reglane_index < 4);
146 insert_field (FLD_SM3_imm2, code, reglane_index, 0);
150 /* index for e.g. SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]
151 or SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */
152 unsigned reglane_index = info->reglane.index;
154 if (inst->opcode->op == OP_FCMLA_ELEM)
155 /* Complex operand takes two elements. */
158 switch (info->qualifier)
160 case AARCH64_OPND_QLF_S_H:
162 assert (reglane_index < 8);
163 insert_fields (code, reglane_index, 0, 3, FLD_M, FLD_L, FLD_H);
165 case AARCH64_OPND_QLF_S_S:
167 assert (reglane_index < 4);
168 insert_fields (code, reglane_index, 0, 2, FLD_L, FLD_H);
170 case AARCH64_OPND_QLF_S_D:
172 assert (reglane_index < 2);
173 insert_field (FLD_H, code, reglane_index, 0);
182 /* Insert regno and len field of a register list operand, e.g. Vn in TBL. */
184 aarch64_ins_reglist (const aarch64_operand *self, const aarch64_opnd_info *info,
186 const aarch64_inst *inst ATTRIBUTE_UNUSED,
187 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
190 insert_field (self->fields[0], code, info->reglist.first_regno, 0);
192 insert_field (FLD_len, code, info->reglist.num_regs - 1, 0);
196 /* Insert Rt and opcode fields for a register list operand, e.g. Vt
197 in AdvSIMD load/store instructions. */
199 aarch64_ins_ldst_reglist (const aarch64_operand *self ATTRIBUTE_UNUSED,
200 const aarch64_opnd_info *info, aarch64_insn *code,
201 const aarch64_inst *inst,
202 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
204 aarch64_insn value = 0;
205 /* Number of elements in each structure to be loaded/stored. */
206 unsigned num = get_opcode_dependent_value (inst->opcode);
209 insert_field (FLD_Rt, code, info->reglist.first_regno, 0);
214 switch (info->reglist.num_regs)
216 case 1: value = 0x7; break;
217 case 2: value = 0xa; break;
218 case 3: value = 0x6; break;
219 case 4: value = 0x2; break;
224 value = info->reglist.num_regs == 4 ? 0x3 : 0x8;
235 insert_field (FLD_opcode, code, value, 0);
240 /* Insert Rt and S fields for a register list operand, e.g. Vt in AdvSIMD load
241 single structure to all lanes instructions. */
243 aarch64_ins_ldst_reglist_r (const aarch64_operand *self ATTRIBUTE_UNUSED,
244 const aarch64_opnd_info *info, aarch64_insn *code,
245 const aarch64_inst *inst,
246 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
249 /* The opcode dependent area stores the number of elements in
250 each structure to be loaded/stored. */
251 int is_ld1r = get_opcode_dependent_value (inst->opcode) == 1;
254 insert_field (FLD_Rt, code, info->reglist.first_regno, 0);
256 value = (aarch64_insn) 0;
257 if (is_ld1r && info->reglist.num_regs == 2)
258 /* OP_LD1R does not have alternating variant, but have "two consecutive"
260 value = (aarch64_insn) 1;
261 insert_field (FLD_S, code, value, 0);
266 /* Insert Q, opcode<2:1>, S, size and Rt fields for a register element list
267 operand e.g. Vt in AdvSIMD load/store single element instructions. */
269 aarch64_ins_ldst_elemlist (const aarch64_operand *self ATTRIBUTE_UNUSED,
270 const aarch64_opnd_info *info, aarch64_insn *code,
271 const aarch64_inst *inst ATTRIBUTE_UNUSED,
272 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
274 aarch64_field field = {0, 0};
275 aarch64_insn QSsize = 0; /* fields Q:S:size. */
276 aarch64_insn opcodeh2 = 0; /* opcode<2:1> */
278 assert (info->reglist.has_index);
281 insert_field (FLD_Rt, code, info->reglist.first_regno, 0);
282 /* Encode the index, opcode<2:1> and size. */
283 switch (info->qualifier)
285 case AARCH64_OPND_QLF_S_B:
286 /* Index encoded in "Q:S:size". */
287 QSsize = info->reglist.index;
290 case AARCH64_OPND_QLF_S_H:
291 /* Index encoded in "Q:S:size<1>". */
292 QSsize = info->reglist.index << 1;
295 case AARCH64_OPND_QLF_S_S:
296 /* Index encoded in "Q:S". */
297 QSsize = info->reglist.index << 2;
300 case AARCH64_OPND_QLF_S_D:
301 /* Index encoded in "Q". */
302 QSsize = info->reglist.index << 3 | 0x1;
308 insert_fields (code, QSsize, 0, 3, FLD_vldst_size, FLD_S, FLD_Q);
309 gen_sub_field (FLD_asisdlso_opcode, 1, 2, &field);
310 insert_field_2 (&field, code, opcodeh2, 0);
315 /* Insert fields immh:immb and/or Q for e.g. the shift immediate in
316 SSHR <Vd>.<T>, <Vn>.<T>, #<shift>
317 or SSHR <V><d>, <V><n>, #<shift>. */
319 aarch64_ins_advsimd_imm_shift (const aarch64_operand *self ATTRIBUTE_UNUSED,
320 const aarch64_opnd_info *info,
321 aarch64_insn *code, const aarch64_inst *inst,
322 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
324 unsigned val = aarch64_get_qualifier_standard_value (info->qualifier);
327 if (inst->opcode->iclass == asimdshf)
331 0000 x SEE AdvSIMD modified immediate
340 Q = (val & 0x1) ? 1 : 0;
341 insert_field (FLD_Q, code, Q, inst->opcode->mask);
345 assert (info->type == AARCH64_OPND_IMM_VLSR
346 || info->type == AARCH64_OPND_IMM_VLSL);
348 if (info->type == AARCH64_OPND_IMM_VLSR)
351 0000 SEE AdvSIMD modified immediate
352 0001 (16-UInt(immh:immb))
353 001x (32-UInt(immh:immb))
354 01xx (64-UInt(immh:immb))
355 1xxx (128-UInt(immh:immb)) */
356 imm = (16 << (unsigned)val) - info->imm.value;
360 0000 SEE AdvSIMD modified immediate
361 0001 (UInt(immh:immb)-8)
362 001x (UInt(immh:immb)-16)
363 01xx (UInt(immh:immb)-32)
364 1xxx (UInt(immh:immb)-64) */
365 imm = info->imm.value + (8 << (unsigned)val);
366 insert_fields (code, imm, 0, 2, FLD_immb, FLD_immh);
371 /* Insert fields for e.g. the immediate operands in
372 BFM <Wd>, <Wn>, #<immr>, #<imms>. */
374 aarch64_ins_imm (const aarch64_operand *self, const aarch64_opnd_info *info,
376 const aarch64_inst *inst ATTRIBUTE_UNUSED,
377 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
381 imm = info->imm.value;
382 if (operand_need_shift_by_two (self))
384 if (operand_need_shift_by_four (self))
386 insert_all_fields (self, code, imm);
390 /* Insert immediate and its shift amount for e.g. the last operand in
391 MOVZ <Wd>, #<imm16>{, LSL #<shift>}. */
393 aarch64_ins_imm_half (const aarch64_operand *self, const aarch64_opnd_info *info,
394 aarch64_insn *code, const aarch64_inst *inst,
395 aarch64_operand_error *errors)
398 aarch64_ins_imm (self, info, code, inst, errors);
400 insert_field (FLD_hw, code, info->shifter.amount >> 4, 0);
404 /* Insert cmode and "a:b:c:d:e:f:g:h" fields for e.g. the last operand in
405 MOVI <Vd>.<T>, #<imm8> {, LSL #<amount>}. */
407 aarch64_ins_advsimd_imm_modified (const aarch64_operand *self ATTRIBUTE_UNUSED,
408 const aarch64_opnd_info *info,
410 const aarch64_inst *inst ATTRIBUTE_UNUSED,
411 aarch64_operand_error *errors
414 enum aarch64_opnd_qualifier opnd0_qualifier = inst->operands[0].qualifier;
415 uint64_t imm = info->imm.value;
416 enum aarch64_modifier_kind kind = info->shifter.kind;
417 int amount = info->shifter.amount;
418 aarch64_field field = {0, 0};
420 /* a:b:c:d:e:f:g:h */
421 if (!info->imm.is_fp && aarch64_get_qualifier_esize (opnd0_qualifier) == 8)
423 /* Either MOVI <Dd>, #<imm>
424 or MOVI <Vd>.2D, #<imm>.
425 <imm> is a 64-bit immediate
426 "aaaaaaaabbbbbbbbccccccccddddddddeeeeeeeeffffffffgggggggghhhhhhhh",
427 encoded in "a:b:c:d:e:f:g:h". */
428 imm = aarch64_shrink_expanded_imm8 (imm);
429 assert ((int)imm >= 0);
431 insert_fields (code, imm, 0, 2, FLD_defgh, FLD_abc);
433 if (kind == AARCH64_MOD_NONE)
436 /* shift amount partially in cmode */
437 assert (kind == AARCH64_MOD_LSL || kind == AARCH64_MOD_MSL);
438 if (kind == AARCH64_MOD_LSL)
440 /* AARCH64_MOD_LSL: shift zeros. */
441 int esize = aarch64_get_qualifier_esize (opnd0_qualifier);
442 assert (esize == 4 || esize == 2 || esize == 1);
443 /* For 8-bit move immediate, the optional LSL #0 does not require
449 gen_sub_field (FLD_cmode, 1, 2, &field); /* per word */
451 gen_sub_field (FLD_cmode, 1, 1, &field); /* per halfword */
455 /* AARCH64_MOD_MSL: shift ones. */
457 gen_sub_field (FLD_cmode, 0, 1, &field); /* per word */
459 insert_field_2 (&field, code, amount, 0);
464 /* Insert fields for an 8-bit floating-point immediate. */
466 aarch64_ins_fpimm (const aarch64_operand *self, const aarch64_opnd_info *info,
468 const aarch64_inst *inst ATTRIBUTE_UNUSED,
469 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
471 insert_all_fields (self, code, info->imm.value);
475 /* Insert 1-bit rotation immediate (#90 or #270). */
477 aarch64_ins_imm_rotate1 (const aarch64_operand *self,
478 const aarch64_opnd_info *info,
479 aarch64_insn *code, const aarch64_inst *inst,
480 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
482 uint64_t rot = (info->imm.value - 90) / 180;
484 insert_field (self->fields[0], code, rot, inst->opcode->mask);
488 /* Insert 2-bit rotation immediate (#0, #90, #180 or #270). */
490 aarch64_ins_imm_rotate2 (const aarch64_operand *self,
491 const aarch64_opnd_info *info,
492 aarch64_insn *code, const aarch64_inst *inst,
493 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
495 uint64_t rot = info->imm.value / 90;
497 insert_field (self->fields[0], code, rot, inst->opcode->mask);
501 /* Insert #<fbits> for the immediate operand in fp fix-point instructions,
502 e.g. SCVTF <Dd>, <Wn>, #<fbits>. */
504 aarch64_ins_fbits (const aarch64_operand *self, const aarch64_opnd_info *info,
506 const aarch64_inst *inst ATTRIBUTE_UNUSED,
507 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
509 insert_field (self->fields[0], code, 64 - info->imm.value, 0);
513 /* Insert arithmetic immediate for e.g. the last operand in
514 SUBS <Wd>, <Wn|WSP>, #<imm> {, <shift>}. */
516 aarch64_ins_aimm (const aarch64_operand *self, const aarch64_opnd_info *info,
517 aarch64_insn *code, const aarch64_inst *inst ATTRIBUTE_UNUSED,
518 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
521 aarch64_insn value = info->shifter.amount ? 1 : 0;
522 insert_field (self->fields[0], code, value, 0);
523 /* imm12 (unsigned) */
524 insert_field (self->fields[1], code, info->imm.value, 0);
528 /* Common routine shared by aarch64_ins{,_inv}_limm. INVERT_P says whether
529 the operand should be inverted before encoding. */
531 aarch64_ins_limm_1 (const aarch64_operand *self,
532 const aarch64_opnd_info *info, aarch64_insn *code,
533 const aarch64_inst *inst, bfd_boolean invert_p,
534 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
537 uint64_t imm = info->imm.value;
538 int esize = aarch64_get_qualifier_esize (inst->operands[0].qualifier);
542 /* The constraint check should have guaranteed this wouldn't happen. */
543 assert (aarch64_logical_immediate_p (imm, esize, &value));
545 insert_fields (code, value, 0, 3, self->fields[2], self->fields[1],
550 /* Insert logical/bitmask immediate for e.g. the last operand in
551 ORR <Wd|WSP>, <Wn>, #<imm>. */
553 aarch64_ins_limm (const aarch64_operand *self, const aarch64_opnd_info *info,
554 aarch64_insn *code, const aarch64_inst *inst,
555 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
557 return aarch64_ins_limm_1 (self, info, code, inst,
558 inst->opcode->op == OP_BIC, errors);
561 /* Insert a logical/bitmask immediate for the BIC alias of AND (etc.). */
563 aarch64_ins_inv_limm (const aarch64_operand *self,
564 const aarch64_opnd_info *info, aarch64_insn *code,
565 const aarch64_inst *inst,
566 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
568 return aarch64_ins_limm_1 (self, info, code, inst, TRUE, errors);
571 /* Encode Ft for e.g. STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]
572 or LDP <Qt1>, <Qt2>, [<Xn|SP>], #<imm>. */
574 aarch64_ins_ft (const aarch64_operand *self, const aarch64_opnd_info *info,
575 aarch64_insn *code, const aarch64_inst *inst,
576 aarch64_operand_error *errors)
578 aarch64_insn value = 0;
580 assert (info->idx == 0);
583 aarch64_ins_regno (self, info, code, inst, errors);
584 if (inst->opcode->iclass == ldstpair_indexed
585 || inst->opcode->iclass == ldstnapair_offs
586 || inst->opcode->iclass == ldstpair_off
587 || inst->opcode->iclass == loadlit)
590 switch (info->qualifier)
592 case AARCH64_OPND_QLF_S_S: value = 0; break;
593 case AARCH64_OPND_QLF_S_D: value = 1; break;
594 case AARCH64_OPND_QLF_S_Q: value = 2; break;
597 insert_field (FLD_ldst_size, code, value, 0);
602 value = aarch64_get_qualifier_standard_value (info->qualifier);
603 insert_fields (code, value, 0, 2, FLD_ldst_size, FLD_opc1);
609 /* Encode the address operand for e.g. STXRB <Ws>, <Wt>, [<Xn|SP>{,#0}]. */
611 aarch64_ins_addr_simple (const aarch64_operand *self ATTRIBUTE_UNUSED,
612 const aarch64_opnd_info *info, aarch64_insn *code,
613 const aarch64_inst *inst ATTRIBUTE_UNUSED,
614 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
617 insert_field (FLD_Rn, code, info->addr.base_regno, 0);
621 /* Encode the address operand for e.g. STGV <Xt>, [<Xn|SP>]!. */
623 aarch64_ins_addr_simple_2 (const aarch64_operand *self,
624 const aarch64_opnd_info *info, aarch64_insn *code,
625 const aarch64_inst *inst,
626 aarch64_operand_error *errors)
629 return aarch64_ins_addr_simple (self, info, code, inst, errors);
632 /* Encode the address operand for e.g.
633 STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */
635 aarch64_ins_addr_regoff (const aarch64_operand *self ATTRIBUTE_UNUSED,
636 const aarch64_opnd_info *info, aarch64_insn *code,
637 const aarch64_inst *inst ATTRIBUTE_UNUSED,
638 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
641 enum aarch64_modifier_kind kind = info->shifter.kind;
644 insert_field (FLD_Rn, code, info->addr.base_regno, 0);
646 insert_field (FLD_Rm, code, info->addr.offset.regno, 0);
648 if (kind == AARCH64_MOD_LSL)
649 kind = AARCH64_MOD_UXTX; /* Trick to enable the table-driven. */
650 insert_field (FLD_option, code, aarch64_get_operand_modifier_value (kind), 0);
652 if (info->qualifier != AARCH64_OPND_QLF_S_B)
653 S = info->shifter.amount != 0;
655 /* For STR <Bt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}},
659 Must be #0 if <extend> is explicitly LSL. */
660 S = info->shifter.operator_present && info->shifter.amount_present;
661 insert_field (FLD_S, code, S, 0);
666 /* Encode the address operand for e.g.
667 stlur <Xt>, [<Xn|SP>{, <amount>}]. */
669 aarch64_ins_addr_offset (const aarch64_operand *self ATTRIBUTE_UNUSED,
670 const aarch64_opnd_info *info, aarch64_insn *code,
671 const aarch64_inst *inst ATTRIBUTE_UNUSED,
672 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
675 insert_field (self->fields[0], code, info->addr.base_regno, 0);
678 int imm = info->addr.offset.imm;
679 insert_field (self->fields[1], code, imm, 0);
682 if (info->addr.writeback)
684 assert (info->addr.preind == 1 && info->addr.postind == 0);
685 insert_field (self->fields[2], code, 1, 0);
690 /* Encode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>, #<simm>]!. */
692 aarch64_ins_addr_simm (const aarch64_operand *self,
693 const aarch64_opnd_info *info,
695 const aarch64_inst *inst ATTRIBUTE_UNUSED,
696 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
701 insert_field (FLD_Rn, code, info->addr.base_regno, 0);
702 /* simm (imm9 or imm7) */
703 imm = info->addr.offset.imm;
704 if (self->fields[0] == FLD_imm7
705 || info->qualifier == AARCH64_OPND_QLF_imm_tag)
706 /* scaled immediate in ld/st pair instructions.. */
707 imm >>= get_logsz (aarch64_get_qualifier_esize (info->qualifier));
708 insert_field (self->fields[0], code, imm, 0);
709 /* pre/post- index */
710 if (info->addr.writeback)
712 assert (inst->opcode->iclass != ldst_unscaled
713 && inst->opcode->iclass != ldstnapair_offs
714 && inst->opcode->iclass != ldstpair_off
715 && inst->opcode->iclass != ldst_unpriv);
716 assert (info->addr.preind != info->addr.postind);
717 if (info->addr.preind)
718 insert_field (self->fields[1], code, 1, 0);
724 /* Encode the address operand for e.g. LDRAA <Xt>, [<Xn|SP>{, #<simm>}]. */
726 aarch64_ins_addr_simm10 (const aarch64_operand *self,
727 const aarch64_opnd_info *info,
729 const aarch64_inst *inst ATTRIBUTE_UNUSED,
730 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
735 insert_field (self->fields[0], code, info->addr.base_regno, 0);
737 imm = info->addr.offset.imm >> 3;
738 insert_field (self->fields[1], code, imm >> 9, 0);
739 insert_field (self->fields[2], code, imm, 0);
741 if (info->addr.writeback)
743 assert (info->addr.preind == 1 && info->addr.postind == 0);
744 insert_field (self->fields[3], code, 1, 0);
749 /* Encode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>{, #<pimm>}]. */
751 aarch64_ins_addr_uimm12 (const aarch64_operand *self,
752 const aarch64_opnd_info *info,
754 const aarch64_inst *inst ATTRIBUTE_UNUSED,
755 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
757 int shift = get_logsz (aarch64_get_qualifier_esize (info->qualifier));
760 insert_field (self->fields[0], code, info->addr.base_regno, 0);
762 insert_field (self->fields[1], code,info->addr.offset.imm >> shift, 0);
766 /* Encode the address operand for e.g.
767 LD1 {<Vt>.<T>, <Vt2>.<T>, <Vt3>.<T>}, [<Xn|SP>], <Xm|#<amount>>. */
769 aarch64_ins_simd_addr_post (const aarch64_operand *self ATTRIBUTE_UNUSED,
770 const aarch64_opnd_info *info, aarch64_insn *code,
771 const aarch64_inst *inst ATTRIBUTE_UNUSED,
772 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
775 insert_field (FLD_Rn, code, info->addr.base_regno, 0);
777 if (info->addr.offset.is_reg)
778 insert_field (FLD_Rm, code, info->addr.offset.regno, 0);
780 insert_field (FLD_Rm, code, 0x1f, 0);
784 /* Encode the condition operand for e.g. CSEL <Xd>, <Xn>, <Xm>, <cond>. */
786 aarch64_ins_cond (const aarch64_operand *self ATTRIBUTE_UNUSED,
787 const aarch64_opnd_info *info, aarch64_insn *code,
788 const aarch64_inst *inst ATTRIBUTE_UNUSED,
789 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
792 insert_field (FLD_cond, code, info->cond->value, 0);
796 /* Encode the system register operand for e.g. MRS <Xt>, <systemreg>. */
798 aarch64_ins_sysreg (const aarch64_operand *self ATTRIBUTE_UNUSED,
799 const aarch64_opnd_info *info, aarch64_insn *code,
800 const aarch64_inst *inst,
801 aarch64_operand_error *detail ATTRIBUTE_UNUSED)
803 /* If a system instruction check if we have any restrictions on which
804 registers it can use. */
805 if (inst->opcode->iclass == ic_system)
807 uint64_t opcode_flags
808 = inst->opcode->flags & (F_SYS_READ | F_SYS_WRITE);
809 uint32_t sysreg_flags
810 = info->sysreg.flags & (F_REG_READ | F_REG_WRITE);
812 /* Check to see if it's read-only, else check if it's write only.
813 if it's both or unspecified don't care. */
814 if (opcode_flags == F_SYS_READ
816 && sysreg_flags != F_REG_READ)
818 detail->kind = AARCH64_OPDE_SYNTAX_ERROR;
819 detail->error = _("specified register cannot be read from");
820 detail->index = info->idx;
821 detail->non_fatal = TRUE;
823 else if (opcode_flags == F_SYS_WRITE
825 && sysreg_flags != F_REG_WRITE)
827 detail->kind = AARCH64_OPDE_SYNTAX_ERROR;
828 detail->error = _("specified register cannot be written to");
829 detail->index = info->idx;
830 detail->non_fatal = TRUE;
833 /* op0:op1:CRn:CRm:op2 */
834 insert_fields (code, info->sysreg.value, inst->opcode->mask, 5,
835 FLD_op2, FLD_CRm, FLD_CRn, FLD_op1, FLD_op0);
839 /* Encode the PSTATE field operand for e.g. MSR <pstatefield>, #<imm>. */
841 aarch64_ins_pstatefield (const aarch64_operand *self ATTRIBUTE_UNUSED,
842 const aarch64_opnd_info *info, aarch64_insn *code,
843 const aarch64_inst *inst ATTRIBUTE_UNUSED,
844 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
847 insert_fields (code, info->pstatefield, inst->opcode->mask, 2,
852 /* Encode the system instruction op operand for e.g. AT <at_op>, <Xt>. */
854 aarch64_ins_sysins_op (const aarch64_operand *self ATTRIBUTE_UNUSED,
855 const aarch64_opnd_info *info, aarch64_insn *code,
856 const aarch64_inst *inst ATTRIBUTE_UNUSED,
857 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
859 /* op1:CRn:CRm:op2 */
860 insert_fields (code, info->sysins_op->value, inst->opcode->mask, 4,
861 FLD_op2, FLD_CRm, FLD_CRn, FLD_op1);
865 /* Encode the memory barrier option operand for e.g. DMB <option>|#<imm>. */
868 aarch64_ins_barrier (const aarch64_operand *self ATTRIBUTE_UNUSED,
869 const aarch64_opnd_info *info, aarch64_insn *code,
870 const aarch64_inst *inst ATTRIBUTE_UNUSED,
871 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
874 insert_field (FLD_CRm, code, info->barrier->value, 0);
878 /* Encode the prefetch operation option operand for e.g.
879 PRFM <prfop>, [<Xn|SP>{, #<pimm>}]. */
882 aarch64_ins_prfop (const aarch64_operand *self ATTRIBUTE_UNUSED,
883 const aarch64_opnd_info *info, aarch64_insn *code,
884 const aarch64_inst *inst ATTRIBUTE_UNUSED,
885 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
888 insert_field (FLD_Rt, code, info->prfop->value, 0);
892 /* Encode the hint number for instructions that alias HINT but take an
896 aarch64_ins_hint (const aarch64_operand *self ATTRIBUTE_UNUSED,
897 const aarch64_opnd_info *info, aarch64_insn *code,
898 const aarch64_inst *inst ATTRIBUTE_UNUSED,
899 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
902 insert_fields (code, info->hint_option->value, 0, 2, FLD_op2, FLD_CRm);
906 /* Encode the extended register operand for e.g.
907 STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */
909 aarch64_ins_reg_extended (const aarch64_operand *self ATTRIBUTE_UNUSED,
910 const aarch64_opnd_info *info, aarch64_insn *code,
911 const aarch64_inst *inst ATTRIBUTE_UNUSED,
912 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
914 enum aarch64_modifier_kind kind;
917 insert_field (FLD_Rm, code, info->reg.regno, 0);
919 kind = info->shifter.kind;
920 if (kind == AARCH64_MOD_LSL)
921 kind = info->qualifier == AARCH64_OPND_QLF_W
922 ? AARCH64_MOD_UXTW : AARCH64_MOD_UXTX;
923 insert_field (FLD_option, code, aarch64_get_operand_modifier_value (kind), 0);
925 insert_field (FLD_imm3, code, info->shifter.amount, 0);
930 /* Encode the shifted register operand for e.g.
931 SUBS <Xd>, <Xn>, <Xm> {, <shift> #<amount>}. */
933 aarch64_ins_reg_shifted (const aarch64_operand *self ATTRIBUTE_UNUSED,
934 const aarch64_opnd_info *info, aarch64_insn *code,
935 const aarch64_inst *inst ATTRIBUTE_UNUSED,
936 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
939 insert_field (FLD_Rm, code, info->reg.regno, 0);
941 insert_field (FLD_shift, code,
942 aarch64_get_operand_modifier_value (info->shifter.kind), 0);
944 insert_field (FLD_imm6, code, info->shifter.amount, 0);
949 /* Encode an SVE address [<base>, #<simm4>*<factor>, MUL VL],
950 where <simm4> is a 4-bit signed value and where <factor> is 1 plus
951 SELF's operand-dependent value. fields[0] specifies the field that
952 holds <base>. <simm4> is encoded in the SVE_imm4 field. */
954 aarch64_ins_sve_addr_ri_s4xvl (const aarch64_operand *self,
955 const aarch64_opnd_info *info,
957 const aarch64_inst *inst ATTRIBUTE_UNUSED,
958 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
960 int factor = 1 + get_operand_specific_data (self);
961 insert_field (self->fields[0], code, info->addr.base_regno, 0);
962 insert_field (FLD_SVE_imm4, code, info->addr.offset.imm / factor, 0);
966 /* Encode an SVE address [<base>, #<simm6>*<factor>, MUL VL],
967 where <simm6> is a 6-bit signed value and where <factor> is 1 plus
968 SELF's operand-dependent value. fields[0] specifies the field that
969 holds <base>. <simm6> is encoded in the SVE_imm6 field. */
971 aarch64_ins_sve_addr_ri_s6xvl (const aarch64_operand *self,
972 const aarch64_opnd_info *info,
974 const aarch64_inst *inst ATTRIBUTE_UNUSED,
975 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
977 int factor = 1 + get_operand_specific_data (self);
978 insert_field (self->fields[0], code, info->addr.base_regno, 0);
979 insert_field (FLD_SVE_imm6, code, info->addr.offset.imm / factor, 0);
983 /* Encode an SVE address [<base>, #<simm9>*<factor>, MUL VL],
984 where <simm9> is a 9-bit signed value and where <factor> is 1 plus
985 SELF's operand-dependent value. fields[0] specifies the field that
986 holds <base>. <simm9> is encoded in the concatenation of the SVE_imm6
987 and imm3 fields, with imm3 being the less-significant part. */
989 aarch64_ins_sve_addr_ri_s9xvl (const aarch64_operand *self,
990 const aarch64_opnd_info *info,
992 const aarch64_inst *inst ATTRIBUTE_UNUSED,
993 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
995 int factor = 1 + get_operand_specific_data (self);
996 insert_field (self->fields[0], code, info->addr.base_regno, 0);
997 insert_fields (code, info->addr.offset.imm / factor, 0,
998 2, FLD_imm3, FLD_SVE_imm6);
1002 /* Encode an SVE address [X<n>, #<SVE_imm4> << <shift>], where <SVE_imm4>
1003 is a 4-bit signed number and where <shift> is SELF's operand-dependent
1004 value. fields[0] specifies the base register field. */
1006 aarch64_ins_sve_addr_ri_s4 (const aarch64_operand *self,
1007 const aarch64_opnd_info *info, aarch64_insn *code,
1008 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1009 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1011 int factor = 1 << get_operand_specific_data (self);
1012 insert_field (self->fields[0], code, info->addr.base_regno, 0);
1013 insert_field (FLD_SVE_imm4, code, info->addr.offset.imm / factor, 0);
1017 /* Encode an SVE address [X<n>, #<SVE_imm6> << <shift>], where <SVE_imm6>
1018 is a 6-bit unsigned number and where <shift> is SELF's operand-dependent
1019 value. fields[0] specifies the base register field. */
1021 aarch64_ins_sve_addr_ri_u6 (const aarch64_operand *self,
1022 const aarch64_opnd_info *info, aarch64_insn *code,
1023 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1024 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1026 int factor = 1 << get_operand_specific_data (self);
1027 insert_field (self->fields[0], code, info->addr.base_regno, 0);
1028 insert_field (FLD_SVE_imm6, code, info->addr.offset.imm / factor, 0);
1032 /* Encode an SVE address [X<n>, X<m>{, LSL #<shift>}], where <shift>
1033 is SELF's operand-dependent value. fields[0] specifies the base
1034 register field and fields[1] specifies the offset register field. */
1036 aarch64_ins_sve_addr_rr_lsl (const aarch64_operand *self,
1037 const aarch64_opnd_info *info, aarch64_insn *code,
1038 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1039 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1041 insert_field (self->fields[0], code, info->addr.base_regno, 0);
1042 insert_field (self->fields[1], code, info->addr.offset.regno, 0);
1046 /* Encode an SVE address [X<n>, Z<m>.<T>, (S|U)XTW {#<shift>}], where
1047 <shift> is SELF's operand-dependent value. fields[0] specifies the
1048 base register field, fields[1] specifies the offset register field and
1049 fields[2] is a single-bit field that selects SXTW over UXTW. */
1051 aarch64_ins_sve_addr_rz_xtw (const aarch64_operand *self,
1052 const aarch64_opnd_info *info, aarch64_insn *code,
1053 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1054 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1056 insert_field (self->fields[0], code, info->addr.base_regno, 0);
1057 insert_field (self->fields[1], code, info->addr.offset.regno, 0);
1058 if (info->shifter.kind == AARCH64_MOD_UXTW)
1059 insert_field (self->fields[2], code, 0, 0);
1061 insert_field (self->fields[2], code, 1, 0);
1065 /* Encode an SVE address [Z<n>.<T>, #<imm5> << <shift>], where <imm5> is a
1066 5-bit unsigned number and where <shift> is SELF's operand-dependent value.
1067 fields[0] specifies the base register field. */
1069 aarch64_ins_sve_addr_zi_u5 (const aarch64_operand *self,
1070 const aarch64_opnd_info *info, aarch64_insn *code,
1071 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1072 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1074 int factor = 1 << get_operand_specific_data (self);
1075 insert_field (self->fields[0], code, info->addr.base_regno, 0);
1076 insert_field (FLD_imm5, code, info->addr.offset.imm / factor, 0);
1080 /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>{, <modifier> {#<msz>}}],
1081 where <modifier> is fixed by the instruction and where <msz> is a
1082 2-bit unsigned number. fields[0] specifies the base register field
1083 and fields[1] specifies the offset register field. */
1085 aarch64_ext_sve_addr_zz (const aarch64_operand *self,
1086 const aarch64_opnd_info *info, aarch64_insn *code,
1087 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1089 insert_field (self->fields[0], code, info->addr.base_regno, 0);
1090 insert_field (self->fields[1], code, info->addr.offset.regno, 0);
1091 insert_field (FLD_SVE_msz, code, info->shifter.amount, 0);
1095 /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>{, LSL #<msz>}], where
1096 <msz> is a 2-bit unsigned number. fields[0] specifies the base register
1097 field and fields[1] specifies the offset register field. */
1099 aarch64_ins_sve_addr_zz_lsl (const aarch64_operand *self,
1100 const aarch64_opnd_info *info, aarch64_insn *code,
1101 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1102 aarch64_operand_error *errors)
1104 return aarch64_ext_sve_addr_zz (self, info, code, errors);
1107 /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>, SXTW {#<msz>}], where
1108 <msz> is a 2-bit unsigned number. fields[0] specifies the base register
1109 field and fields[1] specifies the offset register field. */
1111 aarch64_ins_sve_addr_zz_sxtw (const aarch64_operand *self,
1112 const aarch64_opnd_info *info,
1114 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1115 aarch64_operand_error *errors)
1117 return aarch64_ext_sve_addr_zz (self, info, code, errors);
1120 /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>, UXTW {#<msz>}], where
1121 <msz> is a 2-bit unsigned number. fields[0] specifies the base register
1122 field and fields[1] specifies the offset register field. */
1124 aarch64_ins_sve_addr_zz_uxtw (const aarch64_operand *self,
1125 const aarch64_opnd_info *info,
1127 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1128 aarch64_operand_error *errors)
1130 return aarch64_ext_sve_addr_zz (self, info, code, errors);
1133 /* Encode an SVE ADD/SUB immediate. */
1135 aarch64_ins_sve_aimm (const aarch64_operand *self,
1136 const aarch64_opnd_info *info, aarch64_insn *code,
1137 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1138 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1140 if (info->shifter.amount == 8)
1141 insert_all_fields (self, code, (info->imm.value & 0xff) | 256);
1142 else if (info->imm.value != 0 && (info->imm.value & 0xff) == 0)
1143 insert_all_fields (self, code, ((info->imm.value / 256) & 0xff) | 256);
1145 insert_all_fields (self, code, info->imm.value & 0xff);
1149 /* Encode an SVE CPY/DUP immediate. */
1151 aarch64_ins_sve_asimm (const aarch64_operand *self,
1152 const aarch64_opnd_info *info, aarch64_insn *code,
1153 const aarch64_inst *inst,
1154 aarch64_operand_error *errors)
1156 return aarch64_ins_sve_aimm (self, info, code, inst, errors);
1159 /* Encode Zn[MM], where MM has a 7-bit triangular encoding. The fields
1160 array specifies which field to use for Zn. MM is encoded in the
1161 concatenation of imm5 and SVE_tszh, with imm5 being the less
1162 significant part. */
1164 aarch64_ins_sve_index (const aarch64_operand *self,
1165 const aarch64_opnd_info *info, aarch64_insn *code,
1166 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1167 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1169 unsigned int esize = aarch64_get_qualifier_esize (info->qualifier);
1170 insert_field (self->fields[0], code, info->reglane.regno, 0);
1171 insert_fields (code, (info->reglane.index * 2 + 1) * esize, 0,
1172 2, FLD_imm5, FLD_SVE_tszh);
1176 /* Encode a logical/bitmask immediate for the MOV alias of SVE DUPM. */
1178 aarch64_ins_sve_limm_mov (const aarch64_operand *self,
1179 const aarch64_opnd_info *info, aarch64_insn *code,
1180 const aarch64_inst *inst,
1181 aarch64_operand_error *errors)
1183 return aarch64_ins_limm (self, info, code, inst, errors);
1186 /* Encode Zn[MM], where Zn occupies the least-significant part of the field
1187 and where MM occupies the most-significant part. The operand-dependent
1188 value specifies the number of bits in Zn. */
1190 aarch64_ins_sve_quad_index (const aarch64_operand *self,
1191 const aarch64_opnd_info *info, aarch64_insn *code,
1192 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1193 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1195 unsigned int reg_bits = get_operand_specific_data (self);
1196 assert (info->reglane.regno < (1U << reg_bits));
1197 unsigned int val = (info->reglane.index << reg_bits) + info->reglane.regno;
1198 insert_all_fields (self, code, val);
1202 /* Encode {Zn.<T> - Zm.<T>}. The fields array specifies which field
1205 aarch64_ins_sve_reglist (const aarch64_operand *self,
1206 const aarch64_opnd_info *info, aarch64_insn *code,
1207 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1208 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1210 insert_field (self->fields[0], code, info->reglist.first_regno, 0);
1214 /* Encode <pattern>{, MUL #<amount>}. The fields array specifies which
1215 fields to use for <pattern>. <amount> - 1 is encoded in the SVE_imm4
1218 aarch64_ins_sve_scale (const aarch64_operand *self,
1219 const aarch64_opnd_info *info, aarch64_insn *code,
1220 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1221 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1223 insert_all_fields (self, code, info->imm.value);
1224 insert_field (FLD_SVE_imm4, code, info->shifter.amount - 1, 0);
1228 /* Encode an SVE shift left immediate. */
1230 aarch64_ins_sve_shlimm (const aarch64_operand *self,
1231 const aarch64_opnd_info *info, aarch64_insn *code,
1232 const aarch64_inst *inst,
1233 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1235 const aarch64_opnd_info *prev_operand;
1238 assert (info->idx > 0);
1239 prev_operand = &inst->operands[info->idx - 1];
1240 esize = aarch64_get_qualifier_esize (prev_operand->qualifier);
1241 insert_all_fields (self, code, 8 * esize + info->imm.value);
1245 /* Encode an SVE shift right immediate. */
1247 aarch64_ins_sve_shrimm (const aarch64_operand *self,
1248 const aarch64_opnd_info *info, aarch64_insn *code,
1249 const aarch64_inst *inst,
1250 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1252 const aarch64_opnd_info *prev_operand;
1255 assert (info->idx > 0);
1256 prev_operand = &inst->operands[info->idx - 1];
1257 esize = aarch64_get_qualifier_esize (prev_operand->qualifier);
1258 insert_all_fields (self, code, 16 * esize - info->imm.value);
1262 /* Encode a single-bit immediate that selects between #0.5 and #1.0.
1263 The fields array specifies which field to use. */
1265 aarch64_ins_sve_float_half_one (const aarch64_operand *self,
1266 const aarch64_opnd_info *info,
1268 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1269 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1271 if (info->imm.value == 0x3f000000)
1272 insert_field (self->fields[0], code, 0, 0);
1274 insert_field (self->fields[0], code, 1, 0);
1278 /* Encode a single-bit immediate that selects between #0.5 and #2.0.
1279 The fields array specifies which field to use. */
1281 aarch64_ins_sve_float_half_two (const aarch64_operand *self,
1282 const aarch64_opnd_info *info,
1284 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1285 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1287 if (info->imm.value == 0x3f000000)
1288 insert_field (self->fields[0], code, 0, 0);
1290 insert_field (self->fields[0], code, 1, 0);
1294 /* Encode a single-bit immediate that selects between #0.0 and #1.0.
1295 The fields array specifies which field to use. */
1297 aarch64_ins_sve_float_zero_one (const aarch64_operand *self,
1298 const aarch64_opnd_info *info,
1300 const aarch64_inst *inst ATTRIBUTE_UNUSED,
1301 aarch64_operand_error *errors ATTRIBUTE_UNUSED)
1303 if (info->imm.value == 0)
1304 insert_field (self->fields[0], code, 0, 0);
1306 insert_field (self->fields[0], code, 1, 0);
1310 /* Miscellaneous encoding functions. */
1312 /* Encode size[0], i.e. bit 22, for
1313 e.g. FCVTN<Q> <Vd>.<Tb>, <Vn>.<Ta>. */
1316 encode_asimd_fcvt (aarch64_inst *inst)
1319 aarch64_field field = {0, 0};
1320 enum aarch64_opnd_qualifier qualifier;
1322 switch (inst->opcode->op)
1326 /* FCVTN<Q> <Vd>.<Tb>, <Vn>.<Ta>. */
1327 qualifier = inst->operands[1].qualifier;
1331 /* FCVTL<Q> <Vd>.<Ta>, <Vn>.<Tb>. */
1332 qualifier = inst->operands[0].qualifier;
1337 assert (qualifier == AARCH64_OPND_QLF_V_4S
1338 || qualifier == AARCH64_OPND_QLF_V_2D);
1339 value = (qualifier == AARCH64_OPND_QLF_V_4S) ? 0 : 1;
1340 gen_sub_field (FLD_size, 0, 1, &field);
1341 insert_field_2 (&field, &inst->value, value, 0);
1344 /* Encode size[0], i.e. bit 22, for
1345 e.g. FCVTXN <Vb><d>, <Va><n>. */
1348 encode_asisd_fcvtxn (aarch64_inst *inst)
1350 aarch64_insn val = 1;
1351 aarch64_field field = {0, 0};
1352 assert (inst->operands[0].qualifier == AARCH64_OPND_QLF_S_S);
1353 gen_sub_field (FLD_size, 0, 1, &field);
1354 insert_field_2 (&field, &inst->value, val, 0);
1357 /* Encode the 'opc' field for e.g. FCVT <Dd>, <Sn>. */
1359 encode_fcvt (aarch64_inst *inst)
1362 const aarch64_field field = {15, 2};
1365 switch (inst->operands[0].qualifier)
1367 case AARCH64_OPND_QLF_S_S: val = 0; break;
1368 case AARCH64_OPND_QLF_S_D: val = 1; break;
1369 case AARCH64_OPND_QLF_S_H: val = 3; break;
1372 insert_field_2 (&field, &inst->value, val, 0);
1377 /* Return the index in qualifiers_list that INST is using. Should only
1378 be called once the qualifiers are known to be valid. */
1381 aarch64_get_variant (struct aarch64_inst *inst)
1383 int i, nops, variant;
1385 nops = aarch64_num_of_operands (inst->opcode);
1386 for (variant = 0; variant < AARCH64_MAX_QLF_SEQ_NUM; ++variant)
1388 for (i = 0; i < nops; ++i)
1389 if (inst->opcode->qualifiers_list[variant][i]
1390 != inst->operands[i].qualifier)
1398 /* Do miscellaneous encodings that are not common enough to be driven by
1402 do_misc_encoding (aarch64_inst *inst)
1406 switch (inst->opcode->op)
1415 encode_asimd_fcvt (inst);
1418 encode_asisd_fcvtxn (inst);
1422 /* Copy Pn to Pm and Pg. */
1423 value = extract_field (FLD_SVE_Pn, inst->value, 0);
1424 insert_field (FLD_SVE_Pm, &inst->value, value, 0);
1425 insert_field (FLD_SVE_Pg4_10, &inst->value, value, 0);
1428 /* Copy Zd to Zm. */
1429 value = extract_field (FLD_SVE_Zd, inst->value, 0);
1430 insert_field (FLD_SVE_Zm_16, &inst->value, value, 0);
1433 /* Fill in the zero immediate. */
1434 insert_fields (&inst->value, 1 << aarch64_get_variant (inst), 0,
1435 2, FLD_imm5, FLD_SVE_tszh);
1438 /* Copy Zn to Zm. */
1439 value = extract_field (FLD_SVE_Zn, inst->value, 0);
1440 insert_field (FLD_SVE_Zm_16, &inst->value, value, 0);
1445 /* Copy Pd to Pm. */
1446 value = extract_field (FLD_SVE_Pd, inst->value, 0);
1447 insert_field (FLD_SVE_Pm, &inst->value, value, 0);
1449 case OP_MOVZS_P_P_P:
1451 /* Copy Pn to Pm. */
1452 value = extract_field (FLD_SVE_Pn, inst->value, 0);
1453 insert_field (FLD_SVE_Pm, &inst->value, value, 0);
1455 case OP_NOTS_P_P_P_Z:
1456 case OP_NOT_P_P_P_Z:
1457 /* Copy Pg to Pm. */
1458 value = extract_field (FLD_SVE_Pg4_10, inst->value, 0);
1459 insert_field (FLD_SVE_Pm, &inst->value, value, 0);
1465 /* Encode the 'size' and 'Q' field for e.g. SHADD. */
1467 encode_sizeq (aarch64_inst *inst)
1470 enum aarch64_field_kind kind;
1473 /* Get the index of the operand whose information we are going to use
1474 to encode the size and Q fields.
1475 This is deduced from the possible valid qualifier lists. */
1476 idx = aarch64_select_operand_for_sizeq_field_coding (inst->opcode);
1477 DEBUG_TRACE ("idx: %d; qualifier: %s", idx,
1478 aarch64_get_qualifier_name (inst->operands[idx].qualifier));
1479 sizeq = aarch64_get_qualifier_standard_value (inst->operands[idx].qualifier);
1481 insert_field (FLD_Q, &inst->value, sizeq & 0x1, inst->opcode->mask);
1483 if (inst->opcode->iclass == asisdlse
1484 || inst->opcode->iclass == asisdlsep
1485 || inst->opcode->iclass == asisdlso
1486 || inst->opcode->iclass == asisdlsop)
1487 kind = FLD_vldst_size;
1490 insert_field (kind, &inst->value, (sizeq >> 1) & 0x3, inst->opcode->mask);
1493 /* Opcodes that have fields shared by multiple operands are usually flagged
1494 with flags. In this function, we detect such flags and use the
1495 information in one of the related operands to do the encoding. The 'one'
1496 operand is not any operand but one of the operands that has the enough
1497 information for such an encoding. */
1500 do_special_encoding (struct aarch64_inst *inst)
1503 aarch64_insn value = 0;
1505 DEBUG_TRACE ("enter with coding 0x%x", (uint32_t) inst->value);
1507 /* Condition for truly conditional executed instructions, e.g. b.cond. */
1508 if (inst->opcode->flags & F_COND)
1510 insert_field (FLD_cond2, &inst->value, inst->cond->value, 0);
1512 if (inst->opcode->flags & F_SF)
1514 idx = select_operand_for_sf_field_coding (inst->opcode);
1515 value = (inst->operands[idx].qualifier == AARCH64_OPND_QLF_X
1516 || inst->operands[idx].qualifier == AARCH64_OPND_QLF_SP)
1518 insert_field (FLD_sf, &inst->value, value, 0);
1519 if (inst->opcode->flags & F_N)
1520 insert_field (FLD_N, &inst->value, value, inst->opcode->mask);
1522 if (inst->opcode->flags & F_LSE_SZ)
1524 idx = select_operand_for_sf_field_coding (inst->opcode);
1525 value = (inst->operands[idx].qualifier == AARCH64_OPND_QLF_X
1526 || inst->operands[idx].qualifier == AARCH64_OPND_QLF_SP)
1528 insert_field (FLD_lse_sz, &inst->value, value, 0);
1530 if (inst->opcode->flags & F_SIZEQ)
1531 encode_sizeq (inst);
1532 if (inst->opcode->flags & F_FPTYPE)
1534 idx = select_operand_for_fptype_field_coding (inst->opcode);
1535 switch (inst->operands[idx].qualifier)
1537 case AARCH64_OPND_QLF_S_S: value = 0; break;
1538 case AARCH64_OPND_QLF_S_D: value = 1; break;
1539 case AARCH64_OPND_QLF_S_H: value = 3; break;
1540 default: assert (0);
1542 insert_field (FLD_type, &inst->value, value, 0);
1544 if (inst->opcode->flags & F_SSIZE)
1546 enum aarch64_opnd_qualifier qualifier;
1547 idx = select_operand_for_scalar_size_field_coding (inst->opcode);
1548 qualifier = inst->operands[idx].qualifier;
1549 assert (qualifier >= AARCH64_OPND_QLF_S_B
1550 && qualifier <= AARCH64_OPND_QLF_S_Q);
1551 value = aarch64_get_qualifier_standard_value (qualifier);
1552 insert_field (FLD_size, &inst->value, value, inst->opcode->mask);
1554 if (inst->opcode->flags & F_T)
1556 int num; /* num of consecutive '0's on the right side of imm5<3:0>. */
1557 aarch64_field field = {0, 0};
1558 enum aarch64_opnd_qualifier qualifier;
1561 qualifier = inst->operands[idx].qualifier;
1562 assert (aarch64_get_operand_class (inst->opcode->operands[0])
1563 == AARCH64_OPND_CLASS_SIMD_REG
1564 && qualifier >= AARCH64_OPND_QLF_V_8B
1565 && qualifier <= AARCH64_OPND_QLF_V_2D);
1576 value = aarch64_get_qualifier_standard_value (qualifier);
1577 insert_field (FLD_Q, &inst->value, value & 0x1, inst->opcode->mask);
1578 num = (int) value >> 1;
1579 assert (num >= 0 && num <= 3);
1580 gen_sub_field (FLD_imm5, 0, num + 1, &field);
1581 insert_field_2 (&field, &inst->value, 1 << num, inst->opcode->mask);
1583 if (inst->opcode->flags & F_GPRSIZE_IN_Q)
1585 /* Use Rt to encode in the case of e.g.
1586 STXP <Ws>, <Xt1>, <Xt2>, [<Xn|SP>{,#0}]. */
1587 enum aarch64_opnd_qualifier qualifier;
1588 idx = aarch64_operand_index (inst->opcode->operands, AARCH64_OPND_Rt);
1590 /* Otherwise use the result operand, which has to be a integer
1593 assert (idx == 0 || idx == 1);
1594 assert (aarch64_get_operand_class (inst->opcode->operands[idx])
1595 == AARCH64_OPND_CLASS_INT_REG);
1596 qualifier = inst->operands[idx].qualifier;
1597 insert_field (FLD_Q, &inst->value,
1598 aarch64_get_qualifier_standard_value (qualifier), 0);
1600 if (inst->opcode->flags & F_LDS_SIZE)
1602 /* e.g. LDRSB <Wt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */
1603 enum aarch64_opnd_qualifier qualifier;
1604 aarch64_field field = {0, 0};
1605 assert (aarch64_get_operand_class (inst->opcode->operands[0])
1606 == AARCH64_OPND_CLASS_INT_REG);
1607 gen_sub_field (FLD_opc, 0, 1, &field);
1608 qualifier = inst->operands[0].qualifier;
1609 insert_field_2 (&field, &inst->value,
1610 1 - aarch64_get_qualifier_standard_value (qualifier), 0);
1612 /* Miscellaneous encoding as the last step. */
1613 if (inst->opcode->flags & F_MISC)
1614 do_misc_encoding (inst);
1616 DEBUG_TRACE ("exit with coding 0x%x", (uint32_t) inst->value);
1619 /* Some instructions (including all SVE ones) use the instruction class
1620 to describe how a qualifiers_list index is represented in the instruction
1621 encoding. If INST is such an instruction, encode the chosen qualifier
1625 aarch64_encode_variant_using_iclass (struct aarch64_inst *inst)
1627 switch (inst->opcode->iclass)
1630 insert_fields (&inst->value, aarch64_get_variant (inst),
1631 0, 2, FLD_SVE_M_14, FLD_size);
1635 case sve_shift_pred:
1636 case sve_shift_unpred:
1637 /* For indices and shift amounts, the variant is encoded as
1638 part of the immediate. */
1642 /* For sve_limm, the .B, .H, and .S forms are just a convenience
1643 and depend on the immediate. They don't have a separate
1648 /* sve_misc instructions have only a single variant. */
1652 insert_fields (&inst->value, aarch64_get_variant (inst),
1653 0, 2, FLD_SVE_M_16, FLD_size);
1657 insert_field (FLD_SVE_M_4, &inst->value, aarch64_get_variant (inst), 0);
1662 insert_field (FLD_size, &inst->value, aarch64_get_variant (inst), 0);
1666 insert_field (FLD_size, &inst->value, aarch64_get_variant (inst) + 1, 0);
1670 insert_field (FLD_SVE_sz, &inst->value, aarch64_get_variant (inst), 0);
1678 /* Converters converting an alias opcode instruction to its real form. */
1680 /* ROR <Wd>, <Ws>, #<shift>
1682 EXTR <Wd>, <Ws>, <Ws>, #<shift>. */
1684 convert_ror_to_extr (aarch64_inst *inst)
1686 copy_operand_info (inst, 3, 2);
1687 copy_operand_info (inst, 2, 1);
1690 /* UXTL<Q> <Vd>.<Ta>, <Vn>.<Tb>
1692 USHLL<Q> <Vd>.<Ta>, <Vn>.<Tb>, #0. */
1694 convert_xtl_to_shll (aarch64_inst *inst)
1696 inst->operands[2].qualifier = inst->operands[1].qualifier;
1697 inst->operands[2].imm.value = 0;
1701 LSR <Xd>, <Xn>, #<shift>
1703 UBFM <Xd>, <Xn>, #<shift>, #63. */
1705 convert_sr_to_bfm (aarch64_inst *inst)
1707 inst->operands[3].imm.value =
1708 inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31 ? 31 : 63;
1711 /* Convert MOV to ORR. */
1713 convert_mov_to_orr (aarch64_inst *inst)
1715 /* MOV <Vd>.<T>, <Vn>.<T>
1717 ORR <Vd>.<T>, <Vn>.<T>, <Vn>.<T>. */
1718 copy_operand_info (inst, 2, 1);
1721 /* When <imms> >= <immr>, the instruction written:
1722 SBFX <Xd>, <Xn>, #<lsb>, #<width>
1724 SBFM <Xd>, <Xn>, #<lsb>, #(<lsb>+<width>-1). */
1727 convert_bfx_to_bfm (aarch64_inst *inst)
1731 /* Convert the operand. */
1732 lsb = inst->operands[2].imm.value;
1733 width = inst->operands[3].imm.value;
1734 inst->operands[2].imm.value = lsb;
1735 inst->operands[3].imm.value = lsb + width - 1;
1738 /* When <imms> < <immr>, the instruction written:
1739 SBFIZ <Xd>, <Xn>, #<lsb>, #<width>
1741 SBFM <Xd>, <Xn>, #((64-<lsb>)&0x3f), #(<width>-1). */
1744 convert_bfi_to_bfm (aarch64_inst *inst)
1748 /* Convert the operand. */
1749 lsb = inst->operands[2].imm.value;
1750 width = inst->operands[3].imm.value;
1751 if (inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31)
1753 inst->operands[2].imm.value = (32 - lsb) & 0x1f;
1754 inst->operands[3].imm.value = width - 1;
1758 inst->operands[2].imm.value = (64 - lsb) & 0x3f;
1759 inst->operands[3].imm.value = width - 1;
1763 /* The instruction written:
1764 BFC <Xd>, #<lsb>, #<width>
1766 BFM <Xd>, XZR, #((64-<lsb>)&0x3f), #(<width>-1). */
1769 convert_bfc_to_bfm (aarch64_inst *inst)
1774 copy_operand_info (inst, 3, 2);
1775 copy_operand_info (inst, 2, 1);
1776 copy_operand_info (inst, 1, 0);
1777 inst->operands[1].reg.regno = 0x1f;
1779 /* Convert the immediate operand. */
1780 lsb = inst->operands[2].imm.value;
1781 width = inst->operands[3].imm.value;
1782 if (inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31)
1784 inst->operands[2].imm.value = (32 - lsb) & 0x1f;
1785 inst->operands[3].imm.value = width - 1;
1789 inst->operands[2].imm.value = (64 - lsb) & 0x3f;
1790 inst->operands[3].imm.value = width - 1;
1794 /* The instruction written:
1795 LSL <Xd>, <Xn>, #<shift>
1797 UBFM <Xd>, <Xn>, #((64-<shift>)&0x3f), #(63-<shift>). */
1800 convert_lsl_to_ubfm (aarch64_inst *inst)
1802 int64_t shift = inst->operands[2].imm.value;
1804 if (inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31)
1806 inst->operands[2].imm.value = (32 - shift) & 0x1f;
1807 inst->operands[3].imm.value = 31 - shift;
1811 inst->operands[2].imm.value = (64 - shift) & 0x3f;
1812 inst->operands[3].imm.value = 63 - shift;
1816 /* CINC <Wd>, <Wn>, <cond>
1818 CSINC <Wd>, <Wn>, <Wn>, invert(<cond>). */
1821 convert_to_csel (aarch64_inst *inst)
1823 copy_operand_info (inst, 3, 2);
1824 copy_operand_info (inst, 2, 1);
1825 inst->operands[3].cond = get_inverted_cond (inst->operands[3].cond);
1828 /* CSET <Wd>, <cond>
1830 CSINC <Wd>, WZR, WZR, invert(<cond>). */
1833 convert_cset_to_csinc (aarch64_inst *inst)
1835 copy_operand_info (inst, 3, 1);
1836 copy_operand_info (inst, 2, 0);
1837 copy_operand_info (inst, 1, 0);
1838 inst->operands[1].reg.regno = 0x1f;
1839 inst->operands[2].reg.regno = 0x1f;
1840 inst->operands[3].cond = get_inverted_cond (inst->operands[3].cond);
1845 MOVZ <Wd>, #<imm16>, LSL #<shift>. */
1848 convert_mov_to_movewide (aarch64_inst *inst)
1851 uint32_t shift_amount;
1854 switch (inst->opcode->op)
1856 case OP_MOV_IMM_WIDE:
1857 value = inst->operands[1].imm.value;
1859 case OP_MOV_IMM_WIDEN:
1860 value = ~inst->operands[1].imm.value;
1865 inst->operands[1].type = AARCH64_OPND_HALF;
1866 is32 = inst->operands[0].qualifier == AARCH64_OPND_QLF_W;
1867 if (! aarch64_wide_constant_p (value, is32, &shift_amount))
1868 /* The constraint check should have guaranteed this wouldn't happen. */
1870 value >>= shift_amount;
1872 inst->operands[1].imm.value = value;
1873 inst->operands[1].shifter.kind = AARCH64_MOD_LSL;
1874 inst->operands[1].shifter.amount = shift_amount;
1879 ORR <Wd>, WZR, #<imm>. */
1882 convert_mov_to_movebitmask (aarch64_inst *inst)
1884 copy_operand_info (inst, 2, 1);
1885 inst->operands[1].reg.regno = 0x1f;
1886 inst->operands[1].skip = 0;
1889 /* Some alias opcodes are assembled by being converted to their real-form. */
1892 convert_to_real (aarch64_inst *inst, const aarch64_opcode *real)
1894 const aarch64_opcode *alias = inst->opcode;
1896 if ((alias->flags & F_CONV) == 0)
1897 goto convert_to_real_return;
1903 convert_sr_to_bfm (inst);
1906 convert_lsl_to_ubfm (inst);
1911 convert_to_csel (inst);
1915 convert_cset_to_csinc (inst);
1920 convert_bfx_to_bfm (inst);
1925 convert_bfi_to_bfm (inst);
1928 convert_bfc_to_bfm (inst);
1931 convert_mov_to_orr (inst);
1933 case OP_MOV_IMM_WIDE:
1934 case OP_MOV_IMM_WIDEN:
1935 convert_mov_to_movewide (inst);
1937 case OP_MOV_IMM_LOG:
1938 convert_mov_to_movebitmask (inst);
1941 convert_ror_to_extr (inst);
1947 convert_xtl_to_shll (inst);
1953 convert_to_real_return:
1954 aarch64_replace_opcode (inst, real);
1957 /* Encode *INST_ORI of the opcode code OPCODE.
1958 Return the encoded result in *CODE and if QLF_SEQ is not NULL, return the
1959 matched operand qualifier sequence in *QLF_SEQ. */
1962 aarch64_opcode_encode (const aarch64_opcode *opcode,
1963 const aarch64_inst *inst_ori, aarch64_insn *code,
1964 aarch64_opnd_qualifier_t *qlf_seq,
1965 aarch64_operand_error *mismatch_detail,
1966 aarch64_instr_sequence* insn_sequence)
1969 const aarch64_opcode *aliased;
1970 aarch64_inst copy, *inst;
1972 DEBUG_TRACE ("enter with %s", opcode->name);
1974 /* Create a copy of *INST_ORI, so that we can do any change we want. */
1978 assert (inst->opcode == NULL || inst->opcode == opcode);
1979 if (inst->opcode == NULL)
1980 inst->opcode = opcode;
1982 /* Constrain the operands.
1983 After passing this, the encoding is guaranteed to succeed. */
1984 if (aarch64_match_operands_constraint (inst, mismatch_detail) == 0)
1986 DEBUG_TRACE ("FAIL since operand constraint not met");
1990 /* Get the base value.
1991 Note: this has to be before the aliasing handling below in order to
1992 get the base value from the alias opcode before we move on to the
1993 aliased opcode for encoding. */
1994 inst->value = opcode->opcode;
1996 /* No need to do anything else if the opcode does not have any operand. */
1997 if (aarch64_num_of_operands (opcode) == 0)
2000 /* Assign operand indexes and check types. Also put the matched
2001 operand qualifiers in *QLF_SEQ to return. */
2002 for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i)
2004 assert (opcode->operands[i] == inst->operands[i].type);
2005 inst->operands[i].idx = i;
2006 if (qlf_seq != NULL)
2007 *qlf_seq = inst->operands[i].qualifier;
2010 aliased = aarch64_find_real_opcode (opcode);
2011 /* If the opcode is an alias and it does not ask for direct encoding by
2012 itself, the instruction will be transformed to the form of real opcode
2013 and the encoding will be carried out using the rules for the aliased
2015 if (aliased != NULL && (opcode->flags & F_CONV))
2017 DEBUG_TRACE ("real opcode '%s' has been found for the alias %s",
2018 aliased->name, opcode->name);
2019 /* Convert the operands to the form of the real opcode. */
2020 convert_to_real (inst, aliased);
2024 aarch64_opnd_info *info = inst->operands;
2026 /* Call the inserter of each operand. */
2027 for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i, ++info)
2029 const aarch64_operand *opnd;
2030 enum aarch64_opnd type = opcode->operands[i];
2031 if (type == AARCH64_OPND_NIL)
2035 DEBUG_TRACE ("skip the incomplete operand %d", i);
2038 opnd = &aarch64_operands[type];
2039 if (operand_has_inserter (opnd)
2040 && !aarch64_insert_operand (opnd, info, &inst->value, inst,
2045 /* Call opcode encoders indicated by flags. */
2046 if (opcode_has_special_coder (opcode))
2047 do_special_encoding (inst);
2049 /* Possibly use the instruction class to encode the chosen qualifier
2051 aarch64_encode_variant_using_iclass (inst);
2053 /* Run a verifier if the instruction has one set. */
2054 if (opcode->verifier)
2056 enum err_type result = opcode->verifier (inst, *code, 0, TRUE,
2057 mismatch_detail, insn_sequence);
2069 /* Always run constrain verifiers, this is needed because constrains need to
2070 maintain a global state. Regardless if the instruction has the flag set
2072 enum err_type result = verify_constraints (inst, *code, 0, TRUE,
2073 mismatch_detail, insn_sequence);
2086 DEBUG_TRACE ("exit with %s", opcode->name);
2088 *code = inst->value;