| /* aarch64-asm.c -- AArch64 assembler support. |
| Copyright (C) 2012-2024 Free Software Foundation, Inc. |
| Contributed by ARM Ltd. |
| |
| This file is part of the GNU opcodes library. |
| |
| This library is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3, or (at your option) |
| any later version. |
| |
| It is distributed in the hope that it will be useful, but WITHOUT |
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
| or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public |
| License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; see the file COPYING3. If not, |
| see <http://www.gnu.org/licenses/>. */ |
| |
| #include "sysdep.h" |
| #include <stdarg.h> |
| #include "libiberty.h" |
| #include "aarch64-asm.h" |
| #include "opintl.h" |
| |
| /* Utilities. */ |
| |
| /* The unnamed arguments consist of the number of fields and information about |
| these fields where the VALUE will be inserted into CODE. MASK can be zero or |
| the base mask of the opcode. |
| |
| N.B. the fields are required to be in such an order than the least signficant |
| field for VALUE comes the first, e.g. the <index> in |
| SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>] |
| is encoded in H:L:M in some cases, the fields H:L:M should be passed in |
| the order of M, L, H. */ |
| |
| static inline void |
| insert_fields (aarch64_insn *code, aarch64_insn value, aarch64_insn mask, ...) |
| { |
| uint32_t num; |
| const aarch64_field *field; |
| enum aarch64_field_kind kind; |
| va_list va; |
| |
| va_start (va, mask); |
| num = va_arg (va, uint32_t); |
| assert (num <= 5); |
| while (num--) |
| { |
| kind = va_arg (va, enum aarch64_field_kind); |
| field = &fields[kind]; |
| insert_field (kind, code, value, mask); |
| value >>= field->width; |
| } |
| va_end (va); |
| } |
| |
| /* Insert a raw field value VALUE into all fields in SELF->fields after START. |
| The least significant bit goes in the final field. */ |
| |
| static void |
| insert_all_fields_after (const aarch64_operand *self, unsigned int start, |
| aarch64_insn *code, aarch64_insn value) |
| { |
| unsigned int i; |
| enum aarch64_field_kind kind; |
| |
| for (i = ARRAY_SIZE (self->fields); i-- > start; ) |
| if (self->fields[i] != FLD_NIL) |
| { |
| kind = self->fields[i]; |
| insert_field (kind, code, value, 0); |
| value >>= fields[kind].width; |
| } |
| } |
| |
| /* Insert a raw field value VALUE into all fields in SELF->fields. |
| The least significant bit goes in the final field. */ |
| |
| static void |
| insert_all_fields (const aarch64_operand *self, aarch64_insn *code, |
| aarch64_insn value) |
| { |
| return insert_all_fields_after (self, 0, code, value); |
| } |
| |
| /* Operand inserters. */ |
| |
| /* Insert nothing. */ |
| bool |
| aarch64_ins_none (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info ATTRIBUTE_UNUSED, |
| aarch64_insn *code ATTRIBUTE_UNUSED, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| return true; |
| } |
| |
| /* Insert register number. */ |
| bool |
| aarch64_ins_regno (const aarch64_operand *self, const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int val = info->reg.regno - get_operand_specific_data (self); |
| insert_field (self->fields[0], code, val, 0); |
| return true; |
| } |
| |
| /* Insert register number, index and/or other data for SIMD register element |
| operand, e.g. the last source operand in |
| SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */ |
| bool |
| aarch64_ins_reglane (const aarch64_operand *self, const aarch64_opnd_info *info, |
| aarch64_insn *code, const aarch64_inst *inst, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* regno */ |
| insert_field (self->fields[0], code, info->reglane.regno, inst->opcode->mask); |
| /* index and/or type */ |
| if (inst->opcode->iclass == asisdone || inst->opcode->iclass == asimdins) |
| { |
| int pos = info->qualifier - AARCH64_OPND_QLF_S_B; |
| if (info->type == AARCH64_OPND_En |
| && inst->opcode->operands[0] == AARCH64_OPND_Ed) |
| { |
| /* index2 for e.g. INS <Vd>.<Ts>[<index1>], <Vn>.<Ts>[<index2>]. */ |
| assert (info->idx == 1); /* Vn */ |
| aarch64_insn value = info->reglane.index << pos; |
| insert_field (FLD_imm4_11, code, value, 0); |
| } |
| else |
| { |
| /* index and type for e.g. DUP <V><d>, <Vn>.<T>[<index>]. |
| imm5<3:0> <V> |
| 0000 RESERVED |
| xxx1 B |
| xx10 H |
| x100 S |
| 1000 D */ |
| aarch64_insn value = ((info->reglane.index << 1) | 1) << pos; |
| insert_field (FLD_imm5, code, value, 0); |
| } |
| } |
| else if (inst->opcode->iclass == dotproduct) |
| { |
| unsigned reglane_index = info->reglane.index; |
| switch (info->qualifier) |
| { |
| case AARCH64_OPND_QLF_S_4B: |
| case AARCH64_OPND_QLF_S_2H: |
| /* H:L */ |
| assert (reglane_index < 4); |
| insert_fields (code, reglane_index, 0, 2, FLD_L, FLD_H); |
| break; |
| case AARCH64_OPND_QLF_S_2B: |
| /* H:L:M */ |
| assert (reglane_index < 8); |
| insert_fields (code, reglane_index, 0, 3, FLD_M, FLD_L, FLD_H); |
| break; |
| default: |
| return false; |
| } |
| } |
| else if (inst->opcode->iclass == cryptosm3) |
| { |
| /* index for e.g. SM3TT2A <Vd>.4S, <Vn>.4S, <Vm>S[<imm2>]. */ |
| unsigned reglane_index = info->reglane.index; |
| assert (reglane_index < 4); |
| insert_field (FLD_SM3_imm2, code, reglane_index, 0); |
| } |
| else |
| { |
| /* index for e.g. SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>] |
| or SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */ |
| unsigned reglane_index = info->reglane.index; |
| |
| if (inst->opcode->op == OP_FCMLA_ELEM) |
| /* Complex operand takes two elements. */ |
| reglane_index *= 2; |
| |
| switch (info->qualifier) |
| { |
| case AARCH64_OPND_QLF_S_B: |
| /* H:imm3 */ |
| assert (reglane_index < 16); |
| insert_fields (code, reglane_index, 0, 2, FLD_imm3_19, FLD_H); |
| break; |
| case AARCH64_OPND_QLF_S_H: |
| /* H:L:M */ |
| assert (reglane_index < 8); |
| insert_fields (code, reglane_index, 0, 3, FLD_M, FLD_L, FLD_H); |
| break; |
| case AARCH64_OPND_QLF_S_S: |
| /* H:L */ |
| assert (reglane_index < 4); |
| insert_fields (code, reglane_index, 0, 2, FLD_L, FLD_H); |
| break; |
| case AARCH64_OPND_QLF_S_D: |
| /* H */ |
| assert (reglane_index < 2); |
| insert_field (FLD_H, code, reglane_index, 0); |
| break; |
| default: |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| /* Insert regno and len field of a register list operand, e.g. Vn in TBL. */ |
| bool |
| aarch64_ins_reglist (const aarch64_operand *self, const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* R */ |
| insert_field (self->fields[0], code, info->reglist.first_regno, 0); |
| /* len */ |
| insert_field (FLD_len, code, info->reglist.num_regs - 1, 0); |
| return true; |
| } |
| |
| /* Insert Rt and opcode fields for a register list operand, e.g. Vt |
| in AdvSIMD load/store instructions. */ |
| bool |
| aarch64_ins_ldst_reglist (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| aarch64_insn value = 0; |
| /* Number of elements in each structure to be loaded/stored. */ |
| unsigned num = get_opcode_dependent_value (inst->opcode); |
| |
| /* Rt */ |
| insert_field (FLD_Rt, code, info->reglist.first_regno, 0); |
| /* opcode */ |
| switch (num) |
| { |
| case 1: |
| switch (info->reglist.num_regs) |
| { |
| case 1: value = 0x7; break; |
| case 2: value = 0xa; break; |
| case 3: value = 0x6; break; |
| case 4: value = 0x2; break; |
| default: return false; |
| } |
| break; |
| case 2: |
| value = info->reglist.num_regs == 4 ? 0x3 : 0x8; |
| break; |
| case 3: |
| value = 0x4; |
| break; |
| case 4: |
| value = 0x0; |
| break; |
| default: |
| return false; |
| } |
| insert_field (FLD_opcode, code, value, 0); |
| |
| return true; |
| } |
| |
| /* Insert Rt and S fields for a register list operand, e.g. Vt in AdvSIMD load |
| single structure to all lanes instructions. */ |
| bool |
| aarch64_ins_ldst_reglist_r (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| aarch64_insn value; |
| /* The opcode dependent area stores the number of elements in |
| each structure to be loaded/stored. */ |
| int is_ld1r = get_opcode_dependent_value (inst->opcode) == 1; |
| |
| /* Rt */ |
| insert_field (FLD_Rt, code, info->reglist.first_regno, 0); |
| /* S */ |
| value = (aarch64_insn) 0; |
| if (is_ld1r && info->reglist.num_regs == 2) |
| /* OP_LD1R does not have alternating variant, but have "two consecutive" |
| instead. */ |
| value = (aarch64_insn) 1; |
| insert_field (FLD_S, code, value, 0); |
| |
| return true; |
| } |
| |
| /* Insert regnos of register list operand for AdvSIMD lut instructions. */ |
| bool |
| aarch64_ins_lut_reglist (const aarch64_operand *self, const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| insert_field (self->fields[0], code, info->reglist.first_regno, 0); |
| return true; |
| } |
| |
| /* Insert Q, opcode<2:1>, S, size and Rt fields for a register element list |
| operand e.g. Vt in AdvSIMD load/store single element instructions. */ |
| bool |
| aarch64_ins_ldst_elemlist (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| aarch64_field field = {0, 0}; |
| aarch64_insn QSsize = 0; /* fields Q:S:size. */ |
| aarch64_insn opcodeh2 = 0; /* opcode<2:1> */ |
| |
| assert (info->reglist.has_index); |
| |
| /* Rt */ |
| insert_field (FLD_Rt, code, info->reglist.first_regno, 0); |
| /* Encode the index, opcode<2:1> and size. */ |
| switch (info->qualifier) |
| { |
| case AARCH64_OPND_QLF_S_B: |
| /* Index encoded in "Q:S:size". */ |
| QSsize = info->reglist.index; |
| opcodeh2 = 0x0; |
| break; |
| case AARCH64_OPND_QLF_S_H: |
| /* Index encoded in "Q:S:size<1>". */ |
| QSsize = info->reglist.index << 1; |
| opcodeh2 = 0x1; |
| break; |
| case AARCH64_OPND_QLF_S_S: |
| /* Index encoded in "Q:S". */ |
| QSsize = info->reglist.index << 2; |
| opcodeh2 = 0x2; |
| break; |
| case AARCH64_OPND_QLF_S_D: |
| /* Index encoded in "Q". */ |
| QSsize = info->reglist.index << 3 | 0x1; |
| opcodeh2 = 0x2; |
| break; |
| default: |
| return false; |
| } |
| insert_fields (code, QSsize, 0, 3, FLD_vldst_size, FLD_S, FLD_Q); |
| gen_sub_field (FLD_asisdlso_opcode, 1, 2, &field); |
| insert_field_2 (&field, code, opcodeh2, 0); |
| |
| return true; |
| } |
| |
| /* Insert fields immh:immb and/or Q for e.g. the shift immediate in |
| SSHR <Vd>.<T>, <Vn>.<T>, #<shift> |
| or SSHR <V><d>, <V><n>, #<shift>. */ |
| bool |
| aarch64_ins_advsimd_imm_shift (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, const aarch64_inst *inst, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| unsigned val = aarch64_get_qualifier_standard_value (info->qualifier); |
| aarch64_insn Q, imm; |
| |
| if (inst->opcode->iclass == asimdshf) |
| { |
| /* Q |
| immh Q <T> |
| 0000 x SEE AdvSIMD modified immediate |
| 0001 0 8B |
| 0001 1 16B |
| 001x 0 4H |
| 001x 1 8H |
| 01xx 0 2S |
| 01xx 1 4S |
| 1xxx 0 RESERVED |
| 1xxx 1 2D */ |
| Q = (val & 0x1) ? 1 : 0; |
| insert_field (FLD_Q, code, Q, inst->opcode->mask); |
| val >>= 1; |
| } |
| |
| assert (info->type == AARCH64_OPND_IMM_VLSR |
| || info->type == AARCH64_OPND_IMM_VLSL); |
| |
| if (info->type == AARCH64_OPND_IMM_VLSR) |
| /* immh:immb |
| immh <shift> |
| 0000 SEE AdvSIMD modified immediate |
| 0001 (16-UInt(immh:immb)) |
| 001x (32-UInt(immh:immb)) |
| 01xx (64-UInt(immh:immb)) |
| 1xxx (128-UInt(immh:immb)) */ |
| imm = (16 << (unsigned)val) - info->imm.value; |
| else |
| /* immh:immb |
| immh <shift> |
| 0000 SEE AdvSIMD modified immediate |
| 0001 (UInt(immh:immb)-8) |
| 001x (UInt(immh:immb)-16) |
| 01xx (UInt(immh:immb)-32) |
| 1xxx (UInt(immh:immb)-64) */ |
| imm = info->imm.value + (8 << (unsigned)val); |
| insert_fields (code, imm, 0, 2, FLD_immb, FLD_immh); |
| |
| return true; |
| } |
| |
| /* Insert fields for e.g. the immediate operands in |
| BFM <Wd>, <Wn>, #<immr>, #<imms>. */ |
| bool |
| aarch64_ins_imm (const aarch64_operand *self, const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int64_t imm; |
| |
| imm = info->imm.value; |
| if (operand_need_shift_by_two (self)) |
| imm >>= 2; |
| if (operand_need_shift_by_three (self)) |
| imm >>= 3; |
| if (operand_need_shift_by_four (self)) |
| imm >>= 4; |
| insert_all_fields (self, code, imm); |
| return true; |
| } |
| |
| /* Insert immediate and its shift amount for e.g. the last operand in |
| MOVZ <Wd>, #<imm16>{, LSL #<shift>}. */ |
| bool |
| aarch64_ins_imm_half (const aarch64_operand *self, const aarch64_opnd_info *info, |
| aarch64_insn *code, const aarch64_inst *inst, |
| aarch64_operand_error *errors) |
| { |
| /* imm16 */ |
| aarch64_ins_imm (self, info, code, inst, errors); |
| /* hw */ |
| insert_field (FLD_hw, code, info->shifter.amount >> 4, 0); |
| return true; |
| } |
| |
| /* Insert cmode and "a:b:c:d:e:f:g:h" fields for e.g. the last operand in |
| MOVI <Vd>.<T>, #<imm8> {, LSL #<amount>}. */ |
| bool |
| aarch64_ins_advsimd_imm_modified (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors |
| ATTRIBUTE_UNUSED) |
| { |
| enum aarch64_opnd_qualifier opnd0_qualifier = inst->operands[0].qualifier; |
| uint64_t imm = info->imm.value; |
| enum aarch64_modifier_kind kind = info->shifter.kind; |
| int amount = info->shifter.amount; |
| aarch64_field field = {0, 0}; |
| |
| /* a:b:c:d:e:f:g:h */ |
| if (!info->imm.is_fp && aarch64_get_qualifier_esize (opnd0_qualifier) == 8) |
| { |
| /* Either MOVI <Dd>, #<imm> |
| or MOVI <Vd>.2D, #<imm>. |
| <imm> is a 64-bit immediate |
| "aaaaaaaabbbbbbbbccccccccddddddddeeeeeeeeffffffffgggggggghhhhhhhh", |
| encoded in "a:b:c:d:e:f:g:h". */ |
| imm = aarch64_shrink_expanded_imm8 (imm); |
| assert ((int)imm >= 0); |
| } |
| insert_fields (code, imm, 0, 2, FLD_defgh, FLD_abc); |
| |
| if (kind == AARCH64_MOD_NONE) |
| return true; |
| |
| /* shift amount partially in cmode */ |
| assert (kind == AARCH64_MOD_LSL || kind == AARCH64_MOD_MSL); |
| if (kind == AARCH64_MOD_LSL) |
| { |
| /* AARCH64_MOD_LSL: shift zeros. */ |
| int esize = aarch64_get_qualifier_esize (opnd0_qualifier); |
| assert (esize == 4 || esize == 2 || esize == 1); |
| /* For 8-bit move immediate, the optional LSL #0 does not require |
| encoding. */ |
| if (esize == 1) |
| return true; |
| amount >>= 3; |
| if (esize == 4) |
| gen_sub_field (FLD_cmode, 1, 2, &field); /* per word */ |
| else |
| gen_sub_field (FLD_cmode, 1, 1, &field); /* per halfword */ |
| } |
| else |
| { |
| /* AARCH64_MOD_MSL: shift ones. */ |
| amount >>= 4; |
| gen_sub_field (FLD_cmode, 0, 1, &field); /* per word */ |
| } |
| insert_field_2 (&field, code, amount, 0); |
| |
| return true; |
| } |
| |
| /* Insert fields for an 8-bit floating-point immediate. */ |
| bool |
| aarch64_ins_fpimm (const aarch64_operand *self, const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| insert_all_fields (self, code, info->imm.value); |
| return true; |
| } |
| |
| /* Insert 1-bit rotation immediate (#90 or #270). */ |
| bool |
| aarch64_ins_imm_rotate1 (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, const aarch64_inst *inst, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| uint64_t rot = (info->imm.value - 90) / 180; |
| assert (rot < 2U); |
| insert_field (self->fields[0], code, rot, inst->opcode->mask); |
| return true; |
| } |
| |
| /* Insert 2-bit rotation immediate (#0, #90, #180 or #270). */ |
| bool |
| aarch64_ins_imm_rotate2 (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, const aarch64_inst *inst, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| uint64_t rot = info->imm.value / 90; |
| assert (rot < 4U); |
| insert_field (self->fields[0], code, rot, inst->opcode->mask); |
| return true; |
| } |
| |
| /* Insert #<fbits> for the immediate operand in fp fix-point instructions, |
| e.g. SCVTF <Dd>, <Wn>, #<fbits>. */ |
| bool |
| aarch64_ins_fbits (const aarch64_operand *self, const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| insert_field (self->fields[0], code, 64 - info->imm.value, 0); |
| return true; |
| } |
| |
| /* Insert arithmetic immediate for e.g. the last operand in |
| SUBS <Wd>, <Wn|WSP>, #<imm> {, <shift>}. */ |
| bool |
| aarch64_ins_aimm (const aarch64_operand *self, const aarch64_opnd_info *info, |
| aarch64_insn *code, const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* shift */ |
| aarch64_insn value = info->shifter.amount ? 1 : 0; |
| insert_field (self->fields[0], code, value, 0); |
| /* imm12 (unsigned) */ |
| insert_field (self->fields[1], code, info->imm.value, 0); |
| return true; |
| } |
| |
| /* Common routine shared by aarch64_ins{,_inv}_limm. INVERT_P says whether |
| the operand should be inverted before encoding. */ |
| static bool |
| aarch64_ins_limm_1 (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst, bool invert_p, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| bool res; |
| aarch64_insn value; |
| uint64_t imm = info->imm.value; |
| int esize = aarch64_get_qualifier_esize (inst->operands[0].qualifier); |
| |
| if (invert_p) |
| imm = ~imm; |
| /* The constraint check should guarantee that this will work. */ |
| res = aarch64_logical_immediate_p (imm, esize, &value); |
| if (res) |
| insert_fields (code, value, 0, 3, self->fields[2], self->fields[1], |
| self->fields[0]); |
| return res; |
| } |
| |
| /* Insert logical/bitmask immediate for e.g. the last operand in |
| ORR <Wd|WSP>, <Wn>, #<imm>. */ |
| bool |
| aarch64_ins_limm (const aarch64_operand *self, const aarch64_opnd_info *info, |
| aarch64_insn *code, const aarch64_inst *inst, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| return aarch64_ins_limm_1 (self, info, code, inst, |
| inst->opcode->op == OP_BIC, errors); |
| } |
| |
| /* Insert a logical/bitmask immediate for the BIC alias of AND (etc.). */ |
| bool |
| aarch64_ins_inv_limm (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| return aarch64_ins_limm_1 (self, info, code, inst, true, errors); |
| } |
| |
| /* Encode Ft for e.g. STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}] |
| or LDP <Qt1>, <Qt2>, [<Xn|SP>], #<imm>. */ |
| bool |
| aarch64_ins_ft (const aarch64_operand *self, const aarch64_opnd_info *info, |
| aarch64_insn *code, const aarch64_inst *inst, |
| aarch64_operand_error *errors) |
| { |
| aarch64_insn value = 0; |
| |
| assert (info->idx == 0); |
| |
| /* Rt */ |
| aarch64_ins_regno (self, info, code, inst, errors); |
| if (inst->opcode->iclass == ldstpair_indexed |
| || inst->opcode->iclass == ldstnapair_offs |
| || inst->opcode->iclass == ldstpair_off |
| || inst->opcode->iclass == loadlit) |
| { |
| /* size */ |
| switch (info->qualifier) |
| { |
| case AARCH64_OPND_QLF_S_S: value = 0; break; |
| case AARCH64_OPND_QLF_S_D: value = 1; break; |
| case AARCH64_OPND_QLF_S_Q: value = 2; break; |
| default: return false; |
| } |
| insert_field (FLD_ldst_size, code, value, 0); |
| } |
| else |
| { |
| /* opc[1]:size */ |
| value = aarch64_get_qualifier_standard_value (info->qualifier); |
| insert_fields (code, value, 0, 2, FLD_ldst_size, FLD_opc1); |
| } |
| |
| return true; |
| } |
| |
| /* Encode the address operand for e.g. STXRB <Ws>, <Wt>, [<Xn|SP>{,#0}]. */ |
| bool |
| aarch64_ins_addr_simple (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* Rn */ |
| insert_field (FLD_Rn, code, info->addr.base_regno, 0); |
| return true; |
| } |
| |
| /* Encode the address operand for e.g. |
| STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */ |
| bool |
| aarch64_ins_addr_regoff (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| aarch64_insn S; |
| enum aarch64_modifier_kind kind = info->shifter.kind; |
| |
| /* Rn */ |
| insert_field (FLD_Rn, code, info->addr.base_regno, 0); |
| /* Rm */ |
| insert_field (FLD_Rm, code, info->addr.offset.regno, 0); |
| /* option */ |
| if (kind == AARCH64_MOD_LSL) |
| kind = AARCH64_MOD_UXTX; /* Trick to enable the table-driven. */ |
| insert_field (FLD_option, code, aarch64_get_operand_modifier_value (kind), 0); |
| /* S */ |
| if (info->qualifier != AARCH64_OPND_QLF_S_B) |
| S = info->shifter.amount != 0; |
| else |
| /* For STR <Bt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}, |
| S <amount> |
| 0 [absent] |
| 1 #0 |
| Must be #0 if <extend> is explicitly LSL. */ |
| S = info->shifter.operator_present && info->shifter.amount_present; |
| insert_field (FLD_S, code, S, 0); |
| |
| return true; |
| } |
| |
| /* Encode the address operand for e.g. |
| stlur <Xt>, [<Xn|SP>{, <amount>}]. */ |
| bool |
| aarch64_ins_addr_offset (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* Rn */ |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| |
| /* simm9 */ |
| int imm = info->addr.offset.imm; |
| insert_field (self->fields[1], code, imm, 0); |
| |
| /* writeback */ |
| if (info->addr.writeback) |
| { |
| assert (info->addr.preind == 1 && info->addr.postind == 0); |
| insert_field (self->fields[2], code, 1, 0); |
| } |
| return true; |
| } |
| |
| /* Encode the address operand for e.g. |
| stlur <Xt>, [<Xn|SP>{, <amount>}]. */ |
| bool |
| aarch64_ins_rcpc3_addr_offset (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* Rn */ |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| |
| /* simm9 */ |
| int imm = info->addr.offset.imm; |
| insert_field (self->fields[1], code, imm, 0); |
| |
| return true; |
| } |
| |
| /* Encode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>, #<simm>]!. */ |
| bool |
| aarch64_ins_addr_simm (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int imm; |
| |
| /* Rn */ |
| insert_field (FLD_Rn, code, info->addr.base_regno, 0); |
| /* simm (imm9 or imm7) */ |
| imm = info->addr.offset.imm; |
| if (self->fields[0] == FLD_imm7 |
| || info->qualifier == AARCH64_OPND_QLF_imm_tag) |
| /* scaled immediate in ld/st pair instructions.. */ |
| imm >>= get_logsz (aarch64_get_qualifier_esize (info->qualifier)); |
| insert_field (self->fields[0], code, imm, 0); |
| /* pre/post- index */ |
| if (info->addr.writeback) |
| { |
| assert (inst->opcode->iclass != ldst_unscaled |
| && inst->opcode->iclass != ldstnapair_offs |
| && inst->opcode->iclass != ldstpair_off |
| && inst->opcode->iclass != ldst_unpriv); |
| assert (info->addr.preind != info->addr.postind); |
| if (info->addr.preind) |
| insert_field (self->fields[1], code, 1, 0); |
| } |
| |
| return true; |
| } |
| |
| /* Encode the address operand, potentially offset by the load/store ammount, |
| e.g. LDIAPP <Xt>, <Xt2> [<Xn|SP>, #<simm>] |
| and STILP <Xt>, <Xt2> [<Xn|SP>], #<simm>.*/ |
| bool |
| aarch64_ins_rcpc3_addr_opt_offset (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int imm; |
| |
| /* Rn */ |
| insert_field (FLD_Rn, code, info->addr.base_regno, 0); |
| /* simm */ |
| imm = info->addr.offset.imm; |
| if (!imm) |
| insert_field (FLD_opc2, code, 1, 0); |
| |
| return true; |
| } |
| |
| /* Encode the address operand for e.g. LDRAA <Xt>, [<Xn|SP>{, #<simm>}]. */ |
| bool |
| aarch64_ins_addr_simm10 (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int imm; |
| |
| /* Rn */ |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| /* simm10 */ |
| imm = info->addr.offset.imm >> 3; |
| insert_field (self->fields[1], code, imm >> 9, 0); |
| insert_field (self->fields[2], code, imm, 0); |
| /* writeback */ |
| if (info->addr.writeback) |
| { |
| assert (info->addr.preind == 1 && info->addr.postind == 0); |
| insert_field (self->fields[3], code, 1, 0); |
| } |
| return true; |
| } |
| |
| /* Encode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>{, #<pimm>}]. */ |
| bool |
| aarch64_ins_addr_uimm12 (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int shift = get_logsz (aarch64_get_qualifier_esize (info->qualifier)); |
| |
| /* Rn */ |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| /* uimm12 */ |
| insert_field (self->fields[1], code,info->addr.offset.imm >> shift, 0); |
| return true; |
| } |
| |
| /* Encode the address operand for e.g. |
| LD1 {<Vt>.<T>, <Vt2>.<T>, <Vt3>.<T>}, [<Xn|SP>], <Xm|#<amount>>. */ |
| bool |
| aarch64_ins_simd_addr_post (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* Rn */ |
| insert_field (FLD_Rn, code, info->addr.base_regno, 0); |
| /* Rm | #<amount> */ |
| if (info->addr.offset.is_reg) |
| insert_field (FLD_Rm, code, info->addr.offset.regno, 0); |
| else |
| insert_field (FLD_Rm, code, 0x1f, 0); |
| return true; |
| } |
| |
| /* Encode the condition operand for e.g. CSEL <Xd>, <Xn>, <Xm>, <cond>. */ |
| bool |
| aarch64_ins_cond (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* cond */ |
| insert_field (FLD_cond, code, info->cond->value, 0); |
| return true; |
| } |
| |
| /* Encode the system register operand for e.g. MRS <Xt>, <systemreg>. */ |
| bool |
| aarch64_ins_sysreg (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst, |
| aarch64_operand_error *detail ATTRIBUTE_UNUSED) |
| { |
| /* If a system instruction check if we have any restrictions on which |
| registers it can use. */ |
| if (inst->opcode->iclass == ic_system) |
| { |
| uint64_t opcode_flags |
| = inst->opcode->flags & (F_SYS_READ | F_SYS_WRITE); |
| uint32_t sysreg_flags |
| = info->sysreg.flags & (F_REG_READ | F_REG_WRITE); |
| |
| /* Check to see if it's read-only, else check if it's write only. |
| if it's both or unspecified don't care. */ |
| if (opcode_flags == F_SYS_READ |
| && sysreg_flags |
| && sysreg_flags != F_REG_READ) |
| { |
| detail->kind = AARCH64_OPDE_SYNTAX_ERROR; |
| detail->error = _("specified register cannot be read from"); |
| detail->index = info->idx; |
| detail->non_fatal = true; |
| } |
| else if (opcode_flags == F_SYS_WRITE |
| && sysreg_flags |
| && sysreg_flags != F_REG_WRITE) |
| { |
| detail->kind = AARCH64_OPDE_SYNTAX_ERROR; |
| detail->error = _("specified register cannot be written to"); |
| detail->index = info->idx; |
| detail->non_fatal = true; |
| } |
| } |
| /* op0:op1:CRn:CRm:op2 */ |
| insert_fields (code, info->sysreg.value, inst->opcode->mask, 5, |
| FLD_op2, FLD_CRm, FLD_CRn, FLD_op1, FLD_op0); |
| return true; |
| } |
| |
| /* Encode the PSTATE field operand for e.g. MSR <pstatefield>, #<imm>. */ |
| bool |
| aarch64_ins_pstatefield (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* op1:op2 */ |
| insert_fields (code, info->pstatefield, inst->opcode->mask, 2, |
| FLD_op2, FLD_op1); |
| |
| /* Extra CRm mask. */ |
| if (info->sysreg.flags | F_REG_IN_CRM) |
| insert_field (FLD_CRm, code, PSTATE_DECODE_CRM (info->sysreg.flags), 0); |
| return true; |
| } |
| |
| /* Encode the system instruction op operand for e.g. AT <at_op>, <Xt>. */ |
| bool |
| aarch64_ins_sysins_op (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* op1:CRn:CRm:op2 */ |
| insert_fields (code, info->sysins_op->value, inst->opcode->mask, 4, |
| FLD_op2, FLD_CRm, FLD_CRn, FLD_op1); |
| return true; |
| } |
| |
| /* Encode the memory barrier option operand for e.g. DMB <option>|#<imm>. */ |
| |
| bool |
| aarch64_ins_barrier (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* CRm */ |
| insert_field (FLD_CRm, code, info->barrier->value, 0); |
| return true; |
| } |
| |
| /* Encode the memory barrier option operand for DSB <option>nXS|#<imm>. */ |
| |
| bool |
| aarch64_ins_barrier_dsb_nxs (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* For the DSB nXS barrier variant: is a 5-bit unsigned immediate, |
| encoded in CRm<3:2>. */ |
| aarch64_insn value = (info->barrier->value >> 2) - 4; |
| insert_field (FLD_CRm_dsb_nxs, code, value, 0); |
| return true; |
| } |
| |
| /* Encode the prefetch operation option operand for e.g. |
| PRFM <prfop>, [<Xn|SP>{, #<pimm>}]. */ |
| |
| bool |
| aarch64_ins_prfop (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* prfop in Rt */ |
| insert_field (FLD_Rt, code, info->prfop->value, 0); |
| return true; |
| } |
| |
| /* Encode the hint number for instructions that alias HINT but take an |
| operand. */ |
| |
| bool |
| aarch64_ins_hint (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* CRm:op2. */ |
| insert_fields (code, info->hint_option->value, 0, 2, FLD_op2, FLD_CRm); |
| return true; |
| } |
| |
| /* Encode the extended register operand for e.g. |
| STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */ |
| bool |
| aarch64_ins_reg_extended (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| enum aarch64_modifier_kind kind; |
| |
| /* Rm */ |
| insert_field (FLD_Rm, code, info->reg.regno, 0); |
| /* option */ |
| kind = info->shifter.kind; |
| if (kind == AARCH64_MOD_LSL) |
| kind = info->qualifier == AARCH64_OPND_QLF_W |
| ? AARCH64_MOD_UXTW : AARCH64_MOD_UXTX; |
| insert_field (FLD_option, code, aarch64_get_operand_modifier_value (kind), 0); |
| /* imm3 */ |
| insert_field (FLD_imm3_10, code, info->shifter.amount, 0); |
| |
| return true; |
| } |
| |
| /* Encode the shifted register operand for e.g. |
| SUBS <Xd>, <Xn>, <Xm> {, <shift> #<amount>}. */ |
| bool |
| aarch64_ins_reg_shifted (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* Rm */ |
| insert_field (FLD_Rm, code, info->reg.regno, 0); |
| /* shift */ |
| insert_field (FLD_shift, code, |
| aarch64_get_operand_modifier_value (info->shifter.kind), 0); |
| /* imm6 */ |
| insert_field (FLD_imm6_10, code, info->shifter.amount, 0); |
| |
| return true; |
| } |
| |
| /* Encode the LSL-shifted register operand for e.g. |
| ADDPT <Xd|SP>, <Xn|SP>, <Xm>{, LSL #<amount>}. */ |
| bool |
| aarch64_ins_reg_lsl_shifted (const aarch64_operand *self ATTRIBUTE_UNUSED, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| /* Rm */ |
| insert_field (FLD_Rm, code, info->reg.regno, 0); |
| /* imm3 */ |
| insert_field (FLD_imm3_10, code, info->shifter.amount, 0); |
| return true; |
| } |
| |
| /* Encode an SVE address [<base>, #<simm4>*<factor>, MUL VL], |
| where <simm4> is a 4-bit signed value and where <factor> is 1 plus |
| SELF's operand-dependent value. fields[0] specifies the field that |
| holds <base>. <simm4> is encoded in the SVE_imm4 field. */ |
| bool |
| aarch64_ins_sve_addr_ri_s4xvl (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int factor = 1 + get_operand_specific_data (self); |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| insert_field (FLD_SVE_imm4, code, info->addr.offset.imm / factor, 0); |
| return true; |
| } |
| |
| /* Encode an SVE address [<base>, #<simm6>*<factor>, MUL VL], |
| where <simm6> is a 6-bit signed value and where <factor> is 1 plus |
| SELF's operand-dependent value. fields[0] specifies the field that |
| holds <base>. <simm6> is encoded in the SVE_imm6 field. */ |
| bool |
| aarch64_ins_sve_addr_ri_s6xvl (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int factor = 1 + get_operand_specific_data (self); |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| insert_field (FLD_SVE_imm6, code, info->addr.offset.imm / factor, 0); |
| return true; |
| } |
| |
| /* Encode an SVE address [<base>, #<simm9>*<factor>, MUL VL], |
| where <simm9> is a 9-bit signed value and where <factor> is 1 plus |
| SELF's operand-dependent value. fields[0] specifies the field that |
| holds <base>. <simm9> is encoded in the concatenation of the SVE_imm6 |
| and imm3 fields, with imm3 being the less-significant part. */ |
| bool |
| aarch64_ins_sve_addr_ri_s9xvl (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int factor = 1 + get_operand_specific_data (self); |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| insert_fields (code, info->addr.offset.imm / factor, 0, |
| 2, FLD_imm3_10, FLD_SVE_imm6); |
| return true; |
| } |
| |
| /* Encode an SVE address [X<n>, #<SVE_imm4> << <shift>], where <SVE_imm4> |
| is a 4-bit signed number and where <shift> is SELF's operand-dependent |
| value. fields[0] specifies the base register field. */ |
| bool |
| aarch64_ins_sve_addr_ri_s4 (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int factor = 1 << get_operand_specific_data (self); |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| insert_field (FLD_SVE_imm4, code, info->addr.offset.imm / factor, 0); |
| return true; |
| } |
| |
| /* Encode an SVE address [X<n>, #<SVE_imm6> << <shift>], where <SVE_imm6> |
| is a 6-bit unsigned number and where <shift> is SELF's operand-dependent |
| value. fields[0] specifies the base register field. */ |
| bool |
| aarch64_ins_sve_addr_ri_u6 (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int factor = 1 << get_operand_specific_data (self); |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| insert_field (FLD_SVE_imm6, code, info->addr.offset.imm / factor, 0); |
| return true; |
| } |
| |
| /* Encode an SVE address [X<n>, X<m>{, LSL #<shift>}], where <shift> |
| is SELF's operand-dependent value. fields[0] specifies the base |
| register field and fields[1] specifies the offset register field. */ |
| bool |
| aarch64_ins_sve_addr_rr_lsl (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| insert_field (self->fields[1], code, info->addr.offset.regno, 0); |
| return true; |
| } |
| |
| /* Encode an SVE address [X<n>, Z<m>.<T>, (S|U)XTW {#<shift>}], where |
| <shift> is SELF's operand-dependent value. fields[0] specifies the |
| base register field, fields[1] specifies the offset register field and |
| fields[2] is a single-bit field that selects SXTW over UXTW. */ |
| bool |
| aarch64_ins_sve_addr_rz_xtw (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| insert_field (self->fields[1], code, info->addr.offset.regno, 0); |
| if (info->shifter.kind == AARCH64_MOD_UXTW) |
| insert_field (self->fields[2], code, 0, 0); |
| else |
| insert_field (self->fields[2], code, 1, 0); |
| return true; |
| } |
| |
| /* Encode an SVE address [Z<n>.<T>, #<imm5> << <shift>], where <imm5> is a |
| 5-bit unsigned number and where <shift> is SELF's operand-dependent value. |
| fields[0] specifies the base register field. */ |
| bool |
| aarch64_ins_sve_addr_zi_u5 (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int factor = 1 << get_operand_specific_data (self); |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| insert_field (FLD_imm5, code, info->addr.offset.imm / factor, 0); |
| return true; |
| } |
| |
| /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>{, <modifier> {#<msz>}}], |
| where <modifier> is fixed by the instruction and where <msz> is a |
| 2-bit unsigned number. fields[0] specifies the base register field |
| and fields[1] specifies the offset register field. */ |
| static bool |
| aarch64_ext_sve_addr_zz (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| insert_field (self->fields[0], code, info->addr.base_regno, 0); |
| insert_field (self->fields[1], code, info->addr.offset.regno, 0); |
| insert_field (FLD_SVE_msz, code, info->shifter.amount, 0); |
| return true; |
| } |
| |
| /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>{, LSL #<msz>}], where |
| <msz> is a 2-bit unsigned number. fields[0] specifies the base register |
| field and fields[1] specifies the offset register field. */ |
| bool |
| aarch64_ins_sve_addr_zz_lsl (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors) |
| { |
| return aarch64_ext_sve_addr_zz (self, info, code, errors); |
| } |
| |
| /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>, SXTW {#<msz>}], where |
| <msz> is a 2-bit unsigned number. fields[0] specifies the base register |
| field and fields[1] specifies the offset register field. */ |
| bool |
| aarch64_ins_sve_addr_zz_sxtw (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors) |
| { |
| return aarch64_ext_sve_addr_zz (self, info, code, errors); |
| } |
| |
| /* Encode an SVE address [Z<n>.<T>, Z<m>.<T>, UXTW {#<msz>}], where |
| <msz> is a 2-bit unsigned number. fields[0] specifies the base register |
| field and fields[1] specifies the offset register field. */ |
| bool |
| aarch64_ins_sve_addr_zz_uxtw (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors) |
| { |
| return aarch64_ext_sve_addr_zz (self, info, code, errors); |
| } |
| |
| /* Encode an SVE ADD/SUB immediate. */ |
| bool |
| aarch64_ins_sve_aimm (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| if (info->shifter.amount == 8) |
| insert_all_fields (self, code, (info->imm.value & 0xff) | 256); |
| else if (info->imm.value != 0 && (info->imm.value & 0xff) == 0) |
| insert_all_fields (self, code, ((info->imm.value / 256) & 0xff) | 256); |
| else |
| insert_all_fields (self, code, info->imm.value & 0xff); |
| return true; |
| } |
| |
| bool |
| aarch64_ins_sve_aligned_reglist (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| unsigned int num_regs = get_operand_specific_data (self); |
| unsigned int val = info->reglist.first_regno; |
| insert_field (self->fields[0], code, val / num_regs, 0); |
| return true; |
| } |
| |
| /* Encode an SVE CPY/DUP immediate. */ |
| bool |
| aarch64_ins_sve_asimm (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst, |
| aarch64_operand_error *errors) |
| { |
| return aarch64_ins_sve_aimm (self, info, code, inst, errors); |
| } |
| |
| /* Encode Zn[MM], where MM has a 7-bit triangular encoding. The fields |
| array specifies which field to use for Zn. MM is encoded in the |
| concatenation of imm5 and SVE_tszh, with imm5 being the less |
| significant part. */ |
| bool |
| aarch64_ins_sve_index (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| unsigned int esize = aarch64_get_qualifier_esize (info->qualifier); |
| insert_field (self->fields[0], code, info->reglane.regno, 0); |
| insert_all_fields_after (self, 1, code, |
| (info->reglane.index * 2 + 1) * esize); |
| return true; |
| } |
| |
| /* Encode a logical/bitmask immediate for the MOV alias of SVE DUPM. */ |
| bool |
| aarch64_ins_sve_limm_mov (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst, |
| aarch64_operand_error *errors) |
| { |
| return aarch64_ins_limm (self, info, code, inst, errors); |
| } |
| |
| /* Encode Zn[MM], where Zn occupies the least-significant part of the field |
| and where MM occupies the most-significant part. The operand-dependent |
| value specifies the number of bits in Zn. */ |
| bool |
| aarch64_ins_sve_quad_index (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| unsigned int reg_bits = get_operand_specific_data (self); |
| assert (info->reglane.regno < (1U << reg_bits)); |
| unsigned int val = (info->reglane.index << reg_bits) + info->reglane.regno; |
| insert_all_fields (self, code, val); |
| return true; |
| } |
| |
| /* Encode {Zn.<T> - Zm.<T>}. The fields array specifies which field |
| to use for Zn. */ |
| bool |
| aarch64_ins_sve_reglist (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| insert_field (self->fields[0], code, info->reglist.first_regno, 0); |
| return true; |
| } |
| |
| /* Encode a strided register list. The first field holds the top bit |
| (0 or 16) and the second field holds the lower bits. The stride is |
| 16 divided by the list length. */ |
| bool |
| aarch64_ins_sve_strided_reglist (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors |
| ATTRIBUTE_UNUSED) |
| { |
| unsigned int num_regs = get_operand_specific_data (self); |
| unsigned int mask ATTRIBUTE_UNUSED = 16 | (16 / num_regs - 1); |
| unsigned int val = info->reglist.first_regno; |
| assert ((val & mask) == val); |
| insert_field (self->fields[0], code, val >> 4, 0); |
| insert_field (self->fields[1], code, val & 15, 0); |
| return true; |
| } |
| |
| /* Encode <pattern>{, MUL #<amount>}. The fields array specifies which |
| fields to use for <pattern>. <amount> - 1 is encoded in the SVE_imm4 |
| field. */ |
| bool |
| aarch64_ins_sve_scale (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| insert_all_fields (self, code, info->imm.value); |
| insert_field (FLD_SVE_imm4, code, info->shifter.amount - 1, 0); |
| return true; |
| } |
| |
| /* Encode an SVE shift left immediate. */ |
| bool |
| aarch64_ins_sve_shlimm (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| const aarch64_opnd_info *prev_operand; |
| unsigned int esize; |
| |
| assert (info->idx > 0); |
| prev_operand = &inst->operands[info->idx - 1]; |
| esize = aarch64_get_qualifier_esize (prev_operand->qualifier); |
| insert_all_fields (self, code, 8 * esize + info->imm.value); |
| return true; |
| } |
| |
| /* Encode an SVE shift right immediate. */ |
| bool |
| aarch64_ins_sve_shrimm (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| const aarch64_opnd_info *prev_operand; |
| unsigned int esize; |
| |
| unsigned int opnd_backshift = get_operand_specific_data (self); |
| assert (info->idx >= (int)opnd_backshift); |
| prev_operand = &inst->operands[info->idx - opnd_backshift]; |
| esize = aarch64_get_qualifier_esize (prev_operand->qualifier); |
| insert_all_fields (self, code, 16 * esize - info->imm.value); |
| return true; |
| } |
| |
| /* Encode a single-bit immediate that selects between #0.5 and #1.0. |
| The fields array specifies which field to use. */ |
| bool |
| aarch64_ins_sve_float_half_one (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| if (info->imm.value == 0x3f000000) |
| insert_field (self->fields[0], code, 0, 0); |
| else |
| insert_field (self->fields[0], code, 1, 0); |
| return true; |
| } |
| |
| /* Encode a single-bit immediate that selects between #0.5 and #2.0. |
| The fields array specifies which field to use. */ |
| bool |
| aarch64_ins_sve_float_half_two (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| if (info->imm.value == 0x3f000000) |
| insert_field (self->fields[0], code, 0, 0); |
| else |
| insert_field (self->fields[0], code, 1, 0); |
| return true; |
| } |
| |
| /* Encode a single-bit immediate that selects between #0.0 and #1.0. |
| The fields array specifies which field to use. */ |
| bool |
| aarch64_ins_sve_float_zero_one (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| if (info->imm.value == 0) |
| insert_field (self->fields[0], code, 0, 0); |
| else |
| insert_field (self->fields[0], code, 1, 0); |
| return true; |
| } |
| |
| bool |
| aarch64_ins_sme_za_vrs1 (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int za_reg = info->indexed_za.regno; |
| int regno = info->indexed_za.index.regno & 3; |
| int imm = info->indexed_za.index.imm; |
| int v = info->indexed_za.v; |
| int countm1 = info->indexed_za.index.countm1; |
| |
| insert_field (self->fields[0], code, v, 0); |
| insert_field (self->fields[1], code, regno, 0); |
| switch (info->qualifier) |
| { |
| case AARCH64_OPND_QLF_S_B: |
| insert_field (self->fields[2], code, imm / (countm1 + 1), 0); |
| break; |
| case AARCH64_OPND_QLF_S_H: |
| case AARCH64_OPND_QLF_S_S: |
| insert_field (self->fields[2], code, za_reg, 0); |
| insert_field (self->fields[3], code, imm / (countm1 + 1), 0); |
| break; |
| case AARCH64_OPND_QLF_S_D: |
| insert_field (self->fields[2], code, za_reg, 0); |
| break; |
| default: |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool |
| aarch64_ins_sme_za_vrs2 (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int za_reg = info->indexed_za.regno; |
| int regno = info->indexed_za.index.regno & 3; |
| int imm = info->indexed_za.index.imm; |
| int v = info->indexed_za.v; |
| int countm1 = info->indexed_za.index.countm1; |
| |
| insert_field (self->fields[0], code, v, 0); |
| insert_field (self->fields[1], code, regno, 0); |
| switch (info->qualifier) |
| { |
| case AARCH64_OPND_QLF_S_B: |
| insert_field (self->fields[2], code, imm / (countm1 + 1), 0); |
| break; |
| case AARCH64_OPND_QLF_S_H: |
| insert_field (self->fields[2], code, za_reg, 0); |
| insert_field (self->fields[3], code, imm / (countm1 + 1), 0); |
| break; |
| case AARCH64_OPND_QLF_S_S: |
| case AARCH64_OPND_QLF_S_D: |
| insert_field (self->fields[2], code, za_reg, 0); |
| break; |
| default: |
| return false; |
| } |
| |
| return true; |
| } |
| |
| /* Encode in SME instruction such as MOVZA ZA tile slice to vector. */ |
| bool |
| aarch64_ins_sme_za_tile_to_vec (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int fld_v = info->indexed_za.v; |
| int fld_rv = info->indexed_za.index.regno - 12; |
| int fld_zan_imm = info->indexed_za.index.imm; |
| int regno = info->indexed_za.regno; |
| |
| switch (info->qualifier) |
| { |
| case AARCH64_OPND_QLF_S_B: |
| insert_field (FLD_imm4_5, code, fld_zan_imm, 0); |
| break; |
| case AARCH64_OPND_QLF_S_H: |
| insert_field (FLD_ZA8_1, code, regno, 0); |
| insert_field (FLD_imm3_5, code, fld_zan_imm, 0); |
| break; |
| case AARCH64_OPND_QLF_S_S: |
| insert_field (FLD_ZA7_2, code, regno, 0); |
| insert_field (FLD_off2, code, fld_zan_imm, 0); |
| break; |
| case AARCH64_OPND_QLF_S_D: |
| insert_field (FLD_ZA6_3, code, regno, 0); |
| insert_field (FLD_ol, code, fld_zan_imm, 0); |
| break; |
| case AARCH64_OPND_QLF_S_Q: |
| insert_field (FLD_ZA5_4, code, regno, 0); |
| break; |
| default: |
| return false; |
| } |
| |
| insert_field (self->fields[0], code, fld_v, 0); |
| insert_field (self->fields[1], code, fld_rv, 0); |
| |
| return true; |
| } |
| |
| /* Encode in SME instruction such as MOVA ZA tile vector register number, |
| vector indicator, vector selector and immediate. */ |
| bool |
| aarch64_ins_sme_za_hv_tiles (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int fld_size; |
| int fld_q; |
| int fld_v = info->indexed_za.v; |
| int fld_rv = info->indexed_za.index.regno - 12; |
| int fld_zan_imm = info->indexed_za.index.imm; |
| int regno = info->indexed_za.regno; |
| |
| switch (info->qualifier) |
| { |
| case AARCH64_OPND_QLF_S_B: |
| fld_size = 0; |
| fld_q = 0; |
| break; |
| case AARCH64_OPND_QLF_S_H: |
| fld_size = 1; |
| fld_q = 0; |
| fld_zan_imm |= regno << 3; |
| break; |
| case AARCH64_OPND_QLF_S_S: |
| fld_size = 2; |
| fld_q = 0; |
| fld_zan_imm |= regno << 2; |
| break; |
| case AARCH64_OPND_QLF_S_D: |
| fld_size = 3; |
| fld_q = 0; |
| fld_zan_imm |= regno << 1; |
| break; |
| case AARCH64_OPND_QLF_S_Q: |
| fld_size = 3; |
| fld_q = 1; |
| fld_zan_imm = regno; |
| break; |
| default: |
| return false; |
| } |
| |
| insert_field (self->fields[0], code, fld_size, 0); |
| insert_field (self->fields[1], code, fld_q, 0); |
| insert_field (self->fields[2], code, fld_v, 0); |
| insert_field (self->fields[3], code, fld_rv, 0); |
| insert_field (self->fields[4], code, fld_zan_imm, 0); |
| |
| return true; |
| } |
| |
| bool |
| aarch64_ins_sme_za_hv_tiles_range (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors |
| ATTRIBUTE_UNUSED) |
| { |
| int ebytes = aarch64_get_qualifier_esize (info->qualifier); |
| int range_size = get_opcode_dependent_value (inst->opcode); |
| int fld_v = info->indexed_za.v; |
| int fld_rv = info->indexed_za.index.regno - 12; |
| int imm = info->indexed_za.index.imm; |
| int max_value = 16 / range_size / ebytes; |
| |
| if (max_value == 0) |
| max_value = 1; |
| |
| assert (imm % range_size == 0 && (imm / range_size) < max_value); |
| int fld_zan_imm = (info->indexed_za.regno * max_value) | (imm / range_size); |
| assert (fld_zan_imm < (range_size == 4 && ebytes < 8 ? 4 : 8)); |
| |
| insert_field (self->fields[0], code, fld_v, 0); |
| insert_field (self->fields[1], code, fld_rv, 0); |
| insert_field (self->fields[2], code, fld_zan_imm, 0); |
| |
| return true; |
| } |
| |
| /* Encode in SME instruction ZERO list of up to eight 64-bit element tile names |
| separated by commas, encoded in the "imm8" field. |
| |
| For programmer convenience an assembler must also accept the names of |
| 32-bit, 16-bit and 8-bit element tiles which are converted into the |
| corresponding set of 64-bit element tiles. |
| */ |
| bool |
| aarch64_ins_sme_za_list (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int fld_mask = info->imm.value; |
| insert_field (self->fields[0], code, fld_mask, 0); |
| return true; |
| } |
| |
| bool |
| aarch64_ins_sme_za_array (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int regno = info->indexed_za.index.regno & 3; |
| int imm = info->indexed_za.index.imm; |
| int countm1 = info->indexed_za.index.countm1; |
| assert (imm % (countm1 + 1) == 0); |
| insert_field (self->fields[0], code, regno, 0); |
| insert_field (self->fields[1], code, imm / (countm1 + 1), 0); |
| return true; |
| } |
| |
| bool |
| aarch64_ins_sme_addr_ri_u4xvl (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int regno = info->addr.base_regno; |
| int imm = info->addr.offset.imm; |
| insert_field (self->fields[0], code, regno, 0); |
| insert_field (self->fields[1], code, imm, 0); |
| return true; |
| } |
| |
| /* Encode in SMSTART and SMSTOP {SM | ZA } mode. */ |
| bool |
| aarch64_ins_sme_sm_za (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| aarch64_insn fld_crm; |
| /* Set CRm[3:1] bits. */ |
| if (info->reg.regno == 's') |
| fld_crm = 0x02 ; /* SVCRSM. */ |
| else if (info->reg.regno == 'z') |
| fld_crm = 0x04; /* SVCRZA. */ |
| else |
| return false; |
| |
| insert_field (self->fields[0], code, fld_crm, 0); |
| return true; |
| } |
| |
| /* Encode source scalable predicate register (Pn), name of the index base |
| register W12-W15 (Rm), and optional element index, defaulting to 0, in the |
| range 0 to one less than the number of vector elements in a 128-bit vector |
| register, encoded in "i1:tszh:tszl". |
| */ |
| bool |
| aarch64_ins_sme_pred_reg_with_index (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int fld_pn = info->indexed_za.regno; |
| int fld_rm = info->indexed_za.index.regno - 12; |
| int imm = info->indexed_za.index.imm; |
| int fld_i1, fld_tszh, fld_tshl; |
| |
| insert_field (self->fields[0], code, fld_rm, 0); |
| insert_field (self->fields[1], code, fld_pn, 0); |
| |
| /* Optional element index, defaulting to 0, in the range 0 to one less than |
| the number of vector elements in a 128-bit vector register, encoded in |
| "i1:tszh:tszl". |
| |
| i1 tszh tszl <T> |
| 0 0 000 RESERVED |
| x x xx1 B |
| x x x10 H |
| x x 100 S |
| x 1 000 D |
| */ |
| switch (info->qualifier) |
| { |
| case AARCH64_OPND_QLF_S_B: |
| /* <imm> is 4 bit value. */ |
| fld_i1 = (imm >> 3) & 0x1; |
| fld_tszh = (imm >> 2) & 0x1; |
| fld_tshl = ((imm << 1) | 0x1) & 0x7; |
| break; |
| case AARCH64_OPND_QLF_S_H: |
| /* <imm> is 3 bit value. */ |
| fld_i1 = (imm >> 2) & 0x1; |
| fld_tszh = (imm >> 1) & 0x1; |
| fld_tshl = ((imm << 2) | 0x2) & 0x7; |
| break; |
| case AARCH64_OPND_QLF_S_S: |
| /* <imm> is 2 bit value. */ |
| fld_i1 = (imm >> 1) & 0x1; |
| fld_tszh = imm & 0x1; |
| fld_tshl = 0x4; |
| break; |
| case AARCH64_OPND_QLF_S_D: |
| /* <imm> is 1 bit value. */ |
| fld_i1 = imm & 0x1; |
| fld_tszh = 0x1; |
| fld_tshl = 0x0; |
| break; |
| default: |
| return false; |
| } |
| |
| insert_field (self->fields[2], code, fld_i1, 0); |
| insert_field (self->fields[3], code, fld_tszh, 0); |
| insert_field (self->fields[4], code, fld_tshl, 0); |
| return true; |
| } |
| |
| /* Insert X0-X30. Register 31 is unallocated. */ |
| bool |
| aarch64_ins_x0_to_x30 (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| assert (info->reg.regno <= 30); |
| insert_field (self->fields[0], code, info->reg.regno, 0); |
| return true; |
| } |
| |
| /* Insert an indexed register, with the first field being the register |
| number and the remaining fields being the index. */ |
| bool |
| aarch64_ins_simple_index (const aarch64_operand *self, |
| const aarch64_opnd_info *info, |
| aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| int bias = get_operand_specific_data (self); |
| insert_field (self->fields[0], code, info->reglane.regno - bias, 0); |
| insert_all_fields_after (self, 1, code, info->reglane.index); |
| return true; |
| } |
| |
| /* Insert a plain shift-right immediate, when there is only a single |
| element size. */ |
| bool |
| aarch64_ins_plain_shrimm (const aarch64_operand *self, |
| const aarch64_opnd_info *info, aarch64_insn *code, |
| const aarch64_inst *inst ATTRIBUTE_UNUSED, |
| aarch64_operand_error *errors ATTRIBUTE_UNUSED) |
| { |
| unsigned int base = 1 << get_operand_field_width (self, 0); |
| insert_field (self->fields[0], code, base - info->imm.value, 0); |
| return true; |
| } |
| |
| /* Miscellaneous encoding functions. */ |
| |
| /* Encode size[0], i.e. bit 22, for |
| e.g. FCVTN<Q> <Vd>.<Tb>, <Vn>.<Ta>. */ |
| |
| static void |
| encode_asimd_fcvt (aarch64_inst *inst) |
| { |
| aarch64_insn value; |
| aarch64_field field = {0, 0}; |
| enum aarch64_opnd_qualifier qualifier = AARCH64_OPND_QLF_NIL; |
| |
| switch (inst->opcode->op) |
| { |
| case OP_FCVTN: |
| case OP_FCVTN2: |
| /* FCVTN<Q> <Vd>.<Tb>, <Vn>.<Ta>. */ |
| qualifier = inst->operands[1].qualifier; |
| break; |
| case OP_FCVTL: |
| case OP_FCVTL2: |
| /* FCVTL<Q> <Vd>.<Ta>, <Vn>.<Tb>. */ |
| qualifier = inst->operands[0].qualifier; |
| break; |
| default: |
| return; |
| } |
| assert (qualifier == AARCH64_OPND_QLF_V_4S |
| || qualifier == AARCH64_OPND_QLF_V_2D); |
| value = (qualifier == AARCH64_OPND_QLF_V_4S) ? 0 : 1; |
| gen_sub_field (FLD_size, 0, 1, &field); |
| insert_field_2 (&field, &inst->value, value, 0); |
| } |
| |
| /* Encode size[0], i.e. bit 22, for |
| e.g. FCVTXN <Vb><d>, <Va><n>. */ |
| |
| static void |
| encode_asisd_fcvtxn (aarch64_inst *inst) |
| { |
| aarch64_insn val = 1; |
| aarch64_field field = {0, 0}; |
| assert (inst->operands[0].qualifier == AARCH64_OPND_QLF_S_S); |
| gen_sub_field (FLD_size, 0, 1, &field); |
| insert_field_2 (&field, &inst->value, val, 0); |
| } |
| |
| /* Encode the 'opc' field for e.g. FCVT <Dd>, <Sn>. */ |
| static void |
| encode_fcvt (aarch64_inst *inst) |
| { |
| aarch64_insn val; |
| const aarch64_field field = {15, 2}; |
| |
| /* opc dstsize */ |
| switch (inst->operands[0].qualifier) |
| { |
| case AARCH64_OPND_QLF_S_S: val = 0; break; |
| case AARCH64_OPND_QLF_S_D: val = 1; break; |
| case AARCH64_OPND_QLF_S_H: val = 3; break; |
| default: abort (); |
| } |
| insert_field_2 (&field, &inst->value, val, 0); |
| |
| return; |
| } |
| |
| /* Return the index in qualifiers_list that INST is using. Should only |
| be called once the qualifiers are known to be valid. */ |
| |
| static int |
| aarch64_get_variant (struct aarch64_inst *inst) |
| { |
| int i, nops, variant; |
| |
| nops = aarch64_num_of_operands (inst->opcode); |
| for (variant = 0; variant < AARCH64_MAX_QLF_SEQ_NUM; ++variant) |
| { |
| for (i = 0; i < nops; ++i) |
| if (inst->opcode->qualifiers_list[variant][i] |
| != inst->operands[i].qualifier) |
| break; |
| if (i == nops) |
| return variant; |
| } |
| abort (); |
| } |
| |
| /* Do miscellaneous encodings that are not common enough to be driven by |
| flags. */ |
| |
| static void |
| do_misc_encoding (aarch64_inst *inst) |
| { |
| unsigned int value; |
| |
| switch (inst->opcode->op) |
| { |
| case OP_FCVT: |
| encode_fcvt (inst); |
| break; |
| case OP_FCVTN: |
| case OP_FCVTN2: |
| case OP_FCVTL: |
| case OP_FCVTL2: |
| encode_asimd_fcvt (inst); |
| break; |
| case OP_FCVTXN_S: |
| encode_asisd_fcvtxn (inst); |
| break; |
| case OP_MOV_P_P: |
| case OP_MOV_PN_PN: |
| case OP_MOVS_P_P: |
| /* Copy Pn to Pm and Pg. */ |
| value = extract_field (FLD_SVE_Pn, inst->value, 0); |
| insert_field (FLD_SVE_Pm, &inst->value, value, 0); |
| insert_field (FLD_SVE_Pg4_10, &inst->value, value, 0); |
| break; |
| case OP_MOV_Z_P_Z: |
| /* Copy Zd to Zm. */ |
| value = extract_field (FLD_SVE_Zd, inst->value, 0); |
| insert_field (FLD_SVE_Zm_16, &inst->value, value, 0); |
| break; |
| case OP_MOV_Z_V: |
| /* Fill in the zero immediate. */ |
| insert_fields (&inst->value, 1 << aarch64_get_variant (inst), 0, |
| 2, FLD_imm5, FLD_SVE_tszh); |
| break; |
| case OP_MOV_Z_Z: |
| /* Copy Zn to Zm. */ |
| value = extract_field (FLD_SVE_Zn, inst->value, 0); |
| insert_field (FLD_SVE_Zm_16, &inst->value, value, 0); |
| break; |
| case OP_MOV_Z_Zi: |
| break; |
| case OP_MOVM_P_P_P: |
| /* Copy Pd to Pm. */ |
| value = extract_field (FLD_SVE_Pd, inst->value, 0); |
| insert_field (FLD_SVE_Pm, &inst->value, value, 0); |
| break; |
| case OP_MOVZS_P_P_P: |
| case OP_MOVZ_P_P_P: |
| /* Copy Pn to Pm. */ |
| value = extract_field (FLD_SVE_Pn, inst->value, 0); |
| insert_field (FLD_SVE_Pm, &inst->value, value, 0); |
| break; |
| case OP_NOTS_P_P_P_Z: |
| case OP_NOT_P_P_P_Z: |
| /* Copy Pg to Pm. */ |
| value = extract_field (FLD_SVE_Pg4_10, inst->value, 0); |
| insert_field (FLD_SVE_Pm, &inst->value, value, 0); |
| break; |
| default: break; |
| } |
| } |
| |
| /* Encode the 'size' and 'Q' field for e.g. SHADD. */ |
| static void |
| encode_sizeq (aarch64_inst *inst) |
| { |
| aarch64_insn sizeq; |
| enum aarch64_field_kind kind; |
| int idx; |
| |
| /* Get the index of the operand whose information we are going to use |
| to encode the size and Q fields. |
| This is deduced from the possible valid qualifier lists. */ |
| idx = aarch64_select_operand_for_sizeq_field_coding (inst->opcode); |
| DEBUG_TRACE ("idx: %d; qualifier: %s", idx, |
| aarch64_get_qualifier_name (inst->operands[idx].qualifier)); |
| sizeq = aarch64_get_qualifier_standard_value (inst->operands[idx].qualifier); |
| /* Q */ |
| insert_field (FLD_Q, &inst->value, sizeq & 0x1, inst->opcode->mask); |
| /* size */ |
| if (inst->opcode->iclass == asisdlse |
| || inst->opcode->iclass == asisdlsep |
| || inst->opcode->iclass == asisdlso |
| || inst->opcode->iclass == asisdlsop) |
| kind = FLD_vldst_size; |
| else |
| kind = FLD_size; |
| insert_field (kind, &inst->value, (sizeq >> 1) & 0x3, inst->opcode->mask); |
| } |
| |
| /* Opcodes that have fields shared by multiple operands are usually flagged |
| with flags. In this function, we detect such flags and use the |
| information in one of the related operands to do the encoding. The 'one' |
| operand is not any operand but one of the operands that has the enough |
| information for such an encoding. */ |
| |
| static void |
| do_special_encoding (struct aarch64_inst *inst) |
| { |
| int idx; |
| aarch64_insn value = 0; |
| |
| DEBUG_TRACE ("enter with coding 0x%x", (uint32_t) inst->value); |
| |
| /* Condition for truly conditional executed instructions, e.g. b.cond. */ |
| if (inst->opcode->flags & F_COND) |
| { |
| insert_field (FLD_cond2, &inst->value, inst->cond->value, 0); |
| } |
| if (inst->opcode->flags & F_SF) |
| { |
| idx = select_operand_for_sf_field_coding (inst->opcode); |
| value = (inst->operands[idx].qualifier == AARCH64_OPND_QLF_X |
| || inst->operands[idx].qualifier == AARCH64_OPND_QLF_SP) |
| ? 1 : 0; |
| insert_field (FLD_sf, &inst->value, value, 0); |
| if (inst->opcode->flags & F_N) |
| insert_field (FLD_N, &inst->value, value, inst->opcode->mask); |
| } |
| if (inst->opcode->flags & F_LSE_SZ) |
| { |
| idx = select_operand_for_sf_field_coding (inst->opcode); |
| value = (inst->operands[idx].qualifier == AARCH64_OPND_QLF_X |
| || inst->operands[idx].qualifier == AARCH64_OPND_QLF_SP) |
| ? 1 : 0; |
| insert_field (FLD_lse_sz, &inst->value, value, 0); |
| } |
| if (inst->opcode->flags & F_RCPC3_SIZE) |
| { |
| switch (inst->operands[0].qualifier) |
| { |
| case AARCH64_OPND_QLF_W: value = 2; break; |
| case AARCH64_OPND_QLF_X: value = 3; break; |
| case AARCH64_OPND_QLF_S_B: value = 0; break; |
| case AARCH64_OPND_QLF_S_H: value = 1; break; |
| case AARCH64_OPND_QLF_S_S: value = 2; break; |
| case AARCH64_OPND_QLF_S_D: value = 3; break; |
| case AARCH64_OPND_QLF_S_Q: value = 0; break; |
| default: return; |
| } |
| insert_field (FLD_rcpc3_size, &inst->value, value, 0); |
| } |
| |
| if (inst->opcode->flags & F_SIZEQ) |
| encode_sizeq (inst); |
| if (inst->opcode->flags & F_FPTYPE) |
| { |
| idx = select_operand_for_fptype_field_coding (inst->opcode); |
| switch (inst->operands[idx].qualifier) |
| { |
| case AARCH64_OPND_QLF_S_S: value = 0; break; |
| case AARCH64_OPND_QLF_S_D: value = 1; break; |
| case AARCH64_OPND_QLF_S_H: value = 3; break; |
| default: return; |
| } |
| insert_field (FLD_type, &inst->value, value, 0); |
| } |
| if (inst->opcode->flags & F_SSIZE) |
| { |
| enum aarch64_opnd_qualifier qualifier; |
| idx = select_operand_for_scalar_size_field_coding (inst->opcode); |
| qualifier = inst->operands[idx].qualifier; |
| assert (qualifier >= AARCH64_OPND_QLF_S_B |
| && qualifier <= AARCH64_OPND_QLF_S_Q); |
| value = aarch64_get_qualifier_standard_value (qualifier); |
| insert_field (FLD_size, &inst->value, value, inst->opcode->mask); |
| } |
| if (inst->opcode->flags & F_T) |
| { |
| int num; /* num of consecutive '0's on the right side of imm5<3:0>. */ |
| aarch64_field field = {0, 0}; |
| enum aarch64_opnd_qualifier qualifier; |
| |
| idx = 0; |
| qualifier = inst->operands[idx].qualifier; |
| assert (aarch64_get_operand_class (inst->opcode->operands[0]) |
| == AARCH64_OPND_CLASS_SIMD_REG |
| && qualifier >= AARCH64_OPND_QLF_V_8B |
| && qualifier <= AARCH64_OPND_QLF_V_2D); |
| /* imm5<3:0> q <t> |
| 0000 x reserved |
| xxx1 0 8b |
| xxx1 1 16b |
| xx10 0 4h |
| xx10 1 8h |
| x100 0 2s |
| x100 1 4s |
| 1000 0 reserved |
| 1000 1 2d */ |
| value = aarch64_get_qualifier_standard_value (qualifier); |
| insert_field (FLD_Q, &inst->value, value & 0x1, inst->opcode->mask); |
| num = (int) value >> 1; |
| assert (num >= 0 && num <= 3); |
| gen_sub_field (FLD_imm5, 0, num + 1, &field); |
| insert_field_2 (&field, &inst->value, 1 << num, inst->opcode->mask); |
| } |
| |
| if ((inst->opcode->flags & F_OPD_SIZE) && inst->opcode->iclass == sve2_urqvs) |
| { |
| enum aarch64_opnd_qualifier qualifier[2]; |
| aarch64_insn value1 = 0; |
| idx = 0; |
| qualifier[0] = inst->operands[idx].qualifier; |
| qualifier[1] = inst->operands[idx+2].qualifier; |
| value = aarch64_get_qualifier_standard_value (qualifier[0]); |
| value1 = aarch64_get_qualifier_standard_value (qualifier[1]); |
| assert ((value >> 1) == value1); |
| insert_field (FLD_size, &inst->value, value1, inst->opcode->mask); |
| } |
| |
| if (inst->opcode->flags & F_GPRSIZE_IN_Q) |
| { |
| /* Use Rt to encode in the case of e.g. |
| STXP <Ws>, <Xt1>, <Xt2>, [<Xn|SP>{,#0}]. */ |
| enum aarch64_opnd_qualifier qualifier; |
| idx = aarch64_operand_index (inst->opcode->operands, AARCH64_OPND_Rt); |
| if (idx == -1) |
| /* Otherwise use the result operand, which has to be a integer |
| register. */ |
| idx = 0; |
| assert (idx == 0 || idx == 1); |
| assert (aarch64_get_operand_class (inst->opcode->operands[idx]) |
| == AARCH64_OPND_CLASS_INT_REG); |
| qualifier = inst->operands[idx].qualifier; |
| insert_field (FLD_Q, &inst->value, |
| aarch64_get_qualifier_standard_value (qualifier), 0); |
| } |
| if (inst->opcode->flags & F_LDS_SIZE) |
| { |
| /* e.g. LDRSB <Wt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */ |
| enum aarch64_opnd_qualifier qualifier; |
| aarch64_field field = {0, 0}; |
| assert (aarch64_get_operand_class (inst->opcode->operands[0]) |
| == AARCH64_OPND_CLASS_INT_REG); |
| gen_sub_field (FLD_opc, 0, 1, &field); |
| qualifier = inst->operands[0].qualifier; |
| insert_field_2 (&field, &inst->value, |
| 1 - aarch64_get_qualifier_standard_value (qualifier), 0); |
| } |
| /* Miscellaneous encoding as the last step. */ |
| if (inst->opcode->flags & F_MISC) |
| do_misc_encoding (inst); |
| |
| DEBUG_TRACE ("exit with coding 0x%x", (uint32_t) inst->value); |
| } |
| |
| /* Some instructions (including all SVE ones) use the instruction class |
| to describe how a qualifiers_list index is represented in the instruction |
| encoding. If INST is such an instruction, encode the chosen qualifier |
| variant. */ |
| |
| static void |
| aarch64_encode_variant_using_iclass (struct aarch64_inst *inst) |
| { |
| int variant = 0; |
| switch (inst->opcode->iclass) |
| { |
| case sme_mov: |
| case sme_psel: |
| /* The variant is encoded as part of the immediate. */ |
| break; |
| |
| case sme_size_12_bh: |
| insert_field (FLD_S, &inst->value, aarch64_get_variant (inst), 0); |
| break; |
| |
| case sme_size_12_bhs: |
| case sme_size_12_b: |
| insert_field (FLD_SME_size_12, &inst->value, |
| aarch64_get_variant (inst), 0); |
| break; |
| |
| case sme_size_22: |
| insert_field (FLD_SME_size_22, &inst->value, |
| aarch64_get_variant (inst), 0); |
| break; |
| |
| case sme_size_22_hsd: |
| insert_field (FLD_SME_size_22, &inst->value, |
| aarch64_get_variant (inst) + 1, 0); |
| break; |
| |
| case sme_size_12_hs: |
| insert_field (FLD_SME_size_12, &inst->value, |
| aarch64_get_variant (inst) + 1, 0); |
| break; |
| |
| case sme_sz_23: |
| insert_field (FLD_SME_sz_23, &inst->value, |
| aarch64_get_variant (inst), 0); |
| break; |
| |
| case sve_cpy: |
| insert_fields (&inst->value, aarch64_get_variant (inst), |
| 0, 2, FLD_SVE_M_14, FLD_size); |
| break; |
| |
| case sme_shift: |
| case sve_index: |
| case sve_index1: |
| case sve_shift_pred: |
| case sve_shift_unpred: |
| case sve_shift_tsz_hsd: |
| case sve_shift_tsz_bhsd: |
| /* For indices and shift amounts, the variant is encoded as |
| part of the immediate. */ |
| break; |
| |
| case sve_limm: |
| case sme2_mov: |
| /* For sve_limm, the .B, .H, and .S forms are just a convenience |
| and depend on the immediate. They don't have a separate |
| encoding. */ |
| break; |
| |
| case sme_misc: |
| case sme2_movaz: |
| case sve_misc: |
| /* These instructions have only a single variant. */ |
| break; |
| |
| case sve_movprfx: |
| insert_fields (&inst->value, aarch64_get_variant (inst), |
| 0, 2, FLD_SVE_M_16, FLD_size); |
| break; |
| |
| case sve_pred_zm: |
| insert_field (FLD_SVE_M_4, &inst->value, aarch64_get_variant (inst), 0); |
| break; |
| |
| case sve_size_bhs: |
| case sve_size_bhsd: |
| insert_field (FLD_size, &inst->value, aarch64_get_variant (inst), 0); |
| break; |
| |
| case sve_size_hsd: |
| /* MOD 3 For `OP_SVE_Vv_HSD`. */ |
| insert_field (FLD_size, &inst->value, aarch64_get_variant (inst) % 3 + 1, 0); |
| break; |
| |
| case sme_fp_sd: |
| case sme_int_sd: |
| case sve_size_bh: |
| case sve_size_sd: |
| insert_field (FLD_SVE_sz, &inst->value, aarch64_get_variant (inst), 0); |
| break; |
| |
| case sve_size_sd2: |
| insert_field (FLD_SVE_sz2, &inst->value, aarch64_get_variant (inst), 0); |
| break; |
| |
| case sve_size_hsd2: |
| insert_field (FLD_SVE_size, &inst->value, |
| aarch64_get_variant (inst) + 1, 0); |
| break; |
| |
| case sve_size_tsz_bhs: |
| insert_fields (&inst->value, |
| (1 << aarch64_get_variant (inst)), |
| 0, 2, FLD_SVE_tszl_19, FLD_SVE_sz); |
| break; |
| |
| case sve_size_13: |
| variant = aarch64_get_variant (inst) + 1; |
| if (variant == 2) |
| variant = 3; |
| insert_field (FLD_size, &inst->value, variant, 0); |
| break; |
| |
| default: |
| break; |
| } |
| } |
| |
| /* Converters converting an alias opcode instruction to its real form. */ |
| |
| /* ROR <Wd>, <Ws>, #<shift> |
| is equivalent to: |
| EXTR <Wd>, <Ws>, <Ws>, #<shift>. */ |
| static void |
| convert_ror_to_extr (aarch64_inst *inst) |
| { |
| copy_operand_info (inst, 3, 2); |
| copy_operand_info (inst, 2, 1); |
| } |
| |
| /* UXTL<Q> <Vd>.<Ta>, <Vn>.<Tb> |
| is equivalent to: |
| USHLL<Q> <Vd>.<Ta>, <Vn>.<Tb>, #0. */ |
| static void |
| convert_xtl_to_shll (aarch64_inst *inst) |
| { |
| inst->operands[2].qualifier = inst->operands[1].qualifier; |
| inst->operands[2].imm.value = 0; |
| } |
| |
| /* Convert |
| LSR <Xd>, <Xn>, #<shift> |
| to |
| UBFM <Xd>, <Xn>, #<shift>, #63. */ |
| static void |
| convert_sr_to_bfm (aarch64_inst *inst) |
| { |
| inst->operands[3].imm.value = |
| inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31 ? 31 : 63; |
| } |
| |
| /* Convert MOV to ORR. */ |
| static void |
| convert_mov_to_orr (aarch64_inst *inst) |
| { |
| /* MOV <Vd>.<T>, <Vn>.<T> |
| is equivalent to: |
| ORR <Vd>.<T>, <Vn>.<T>, <Vn>.<T>. */ |
| copy_operand_info (inst, 2, 1); |
| } |
| |
| /* When <imms> >= <immr>, the instruction written: |
| SBFX <Xd>, <Xn>, #<lsb>, #<width> |
| is equivalent to: |
| SBFM <Xd>, <Xn>, #<lsb>, #(<lsb>+<width>-1). */ |
| |
| static void |
| convert_bfx_to_bfm (aarch64_inst *inst) |
| { |
| int64_t lsb, width; |
| |
| /* Convert the operand. */ |
| lsb = inst->operands[2].imm.value; |
| width = inst->operands[3].imm.value; |
| inst->operands[2].imm.value = lsb; |
| inst->operands[3].imm.value = lsb + width - 1; |
| } |
| |
| /* When <imms> < <immr>, the instruction written: |
| SBFIZ <Xd>, <Xn>, #<lsb>, #<width> |
| is equivalent to: |
| SBFM <Xd>, <Xn>, #((64-<lsb>)&0x3f), #(<width>-1). */ |
| |
| static void |
| convert_bfi_to_bfm (aarch64_inst *inst) |
| { |
| int64_t lsb, width; |
| |
| /* Convert the operand. */ |
| lsb = inst->operands[2].imm.value; |
| width = inst->operands[3].imm.value; |
| if (inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31) |
| { |
| inst->operands[2].imm.value = (32 - lsb) & 0x1f; |
| inst->operands[3].imm.value = width - 1; |
| } |
| else |
| { |
| inst->operands[2].imm.value = (64 - lsb) & 0x3f; |
| inst->operands[3].imm.value = width - 1; |
| } |
| } |
| |
| /* The instruction written: |
| BFC <Xd>, #<lsb>, #<width> |
| is equivalent to: |
| BFM <Xd>, XZR, #((64-<lsb>)&0x3f), #(<width>-1). */ |
| |
| static void |
| convert_bfc_to_bfm (aarch64_inst *inst) |
| { |
| int64_t lsb, width; |
| |
| /* Insert XZR. */ |
| copy_operand_info (inst, 3, 2); |
| copy_operand_info (inst, 2, 1); |
| copy_operand_info (inst, 1, 0); |
| inst->operands[1].reg.regno = 0x1f; |
| |
| /* Convert the immediate operand. */ |
| lsb = inst->operands[2].imm.value; |
| width = inst->operands[3].imm.value; |
| if (inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31) |
| { |
| inst->operands[2].imm.value = (32 - lsb) & 0x1f; |
| inst->operands[3].imm.value = width - 1; |
| } |
| else |
| { |
| inst->operands[2].imm.value = (64 - lsb) & 0x3f; |
| inst->operands[3].imm.value = width - 1; |
| } |
| } |
| |
| /* The instruction written: |
| LSL <Xd>, <Xn>, #<shift> |
| is equivalent to: |
| UBFM <Xd>, <Xn>, #((64-<shift>)&0x3f), #(63-<shift>). */ |
| |
| static void |
| convert_lsl_to_ubfm (aarch64_inst *inst) |
| { |
| int64_t shift = inst->operands[2].imm.value; |
| |
| if (inst->operands[2].qualifier == AARCH64_OPND_QLF_imm_0_31) |
| { |
| inst->operands[2].imm.value = (32 - shift) & 0x1f; |
| inst->operands[3].imm.value = 31 - shift; |
| } |
| else |
| { |
| inst->operands[2].imm.value = (64 - shift) & 0x3f; |
| inst->operands[3].imm.value = 63 - shift; |
| } |
| } |
| |
| /* CINC <Wd>, <Wn>, <cond> |
| is equivalent to: |
| CSINC <Wd>, <Wn>, <Wn>, invert(<cond>). */ |
| |
| static void |
| convert_to_csel (aarch64_inst *inst) |
| { |
| copy_operand_info (inst, 3, 2); |
| copy_operand_info (inst, 2, 1); |
| inst->operands[3].cond = get_inverted_cond (inst->operands[3].cond); |
| } |
| |
| /* CSET <Wd>, <cond> |
| is equivalent to: |
| CSINC <Wd>, WZR, WZR, invert(<cond>). */ |
| |
| static void |
| convert_cset_to_csinc (aarch64_inst *inst) |
| { |
| copy_operand_info (inst, 3, 1); |
| copy_operand_info (inst, 2, 0); |
| copy_operand_info (inst, 1, 0); |
| inst->operands[1].reg.regno = 0x1f; |
| inst->operands[2].reg.regno = 0x1f; |
| inst->operands[3].cond = get_inverted_cond (inst->operands[3].cond); |
| } |
| |
| /* MOV <Wd>, #<imm> |
| is equivalent to: |
| MOVZ <Wd>, #<imm16>, LSL #<shift>. */ |
| |
| static void |
| convert_mov_to_movewide (aarch64_inst *inst) |
| { |
| int is32; |
| uint32_t shift_amount; |
| uint64_t value = ~(uint64_t)0; |
| |
| switch (inst->opcode->op) |
| { |
| case OP_MOV_IMM_WIDE: |
| value = inst->operands[1].imm.value; |
| break; |
| case OP_MOV_IMM_WIDEN: |
| value = ~inst->operands[1].imm.value; |
| break; |
| default: |
| return; |
| } |
| inst->operands[1].type = AARCH64_OPND_HALF; |
| is32 = inst->operands[0].qualifier == AARCH64_OPND_QLF_W; |
| if (! aarch64_wide_constant_p (value, is32, &shift_amount)) |
| /* The constraint check should have guaranteed this wouldn't happen. */ |
| return; |
| value >>= shift_amount; |
| value &= 0xffff; |
| inst->operands[1].imm.value = value; |
| inst->operands[1].shifter.kind = AARCH64_MOD_LSL; |
| inst->operands[1].shifter.amount = shift_amount; |
| } |
| |
| /* MOV <Wd>, #<imm> |
| is equivalent to: |
| ORR <Wd>, WZR, #<imm>. */ |
| |
| static void |
| convert_mov_to_movebitmask (aarch64_inst *inst) |
| { |
| copy_operand_info (inst, 2, 1); |
| inst->operands[1].reg.regno = 0x1f; |
| inst->operands[1].skip = 0; |
| } |
| |
| /* Some alias opcodes are assembled by being converted to their real-form. */ |
| |
| static void |
| convert_to_real (aarch64_inst *inst, const aarch64_opcode *real) |
| { |
| const aarch64_opcode *alias = inst->opcode; |
| |
| if ((alias->flags & F_CONV) == 0) |
| goto convert_to_real_return; |
| |
| switch (alias->op) |
| { |
| case OP_ASR_IMM: |
| case OP_LSR_IMM: |
| convert_sr_to_bfm (inst); |
| break; |
| case OP_LSL_IMM: |
| convert_lsl_to_ubfm (inst); |
| break; |
| case OP_CINC: |
| case OP_CINV: |
| case OP_CNEG: |
| convert_to_csel (inst); |
| break; |
| case OP_CSET: |
| case OP_CSETM: |
| convert_cset_to_csinc (inst); |
| break; |
| case OP_UBFX: |
| case OP_BFXIL: |
| case OP_SBFX: |
| convert_bfx_to_bfm (inst); |
| break; |
| case OP_SBFIZ: |
| case OP_BFI: |
| case OP_UBFIZ: |
| convert_bfi_to_bfm (inst); |
| break; |
| case OP_BFC: |
| convert_bfc_to_bfm (inst); |
| break; |
| case OP_MOV_V: |
| convert_mov_to_orr (inst); |
| break; |
| case OP_MOV_IMM_WIDE: |
| case OP_MOV_IMM_WIDEN: |
| convert_mov_to_movewide (inst); |
| break; |
| case OP_MOV_IMM_LOG: |
| convert_mov_to_movebitmask (inst); |
| break; |
| case OP_ROR_IMM: |
| convert_ror_to_extr (inst); |
| break; |
| case OP_SXTL: |
| case OP_SXTL2: |
| case OP_UXTL: |
| case OP_UXTL2: |
| convert_xtl_to_shll (inst); |
| break; |
| default: |
| break; |
| } |
| |
| convert_to_real_return: |
| aarch64_replace_opcode (inst, real); |
| } |
| |
| /* Encode *INST_ORI of the opcode code OPCODE. |
| Return the encoded result in *CODE and if QLF_SEQ is not NULL, return the |
| matched operand qualifier sequence in *QLF_SEQ. */ |
| |
| bool |
| aarch64_opcode_encode (const aarch64_opcode *opcode, |
| const aarch64_inst *inst_ori, aarch64_insn *code, |
| aarch64_opnd_qualifier_t *qlf_seq, |
| aarch64_operand_error *mismatch_detail, |
| aarch64_instr_sequence* insn_sequence) |
| { |
| int i; |
| const aarch64_opcode *aliased; |
| aarch64_inst copy, *inst; |
| |
| DEBUG_TRACE ("enter with %s", opcode->name); |
| |
| /* Create a copy of *INST_ORI, so that we can do any change we want. */ |
| copy = *inst_ori; |
| inst = © |
| |
| assert (inst->opcode == NULL || inst->opcode == opcode); |
| if (inst->opcode == NULL) |
| inst->opcode = opcode; |
| |
| /* Constrain the operands. |
| After passing this, the encoding is guaranteed to succeed. */ |
| if (aarch64_match_operands_constraint (inst, mismatch_detail) == 0) |
| { |
| DEBUG_TRACE ("FAIL since operand constraint not met"); |
| return 0; |
| } |
| |
| /* Get the base value. |
| Note: this has to be before the aliasing handling below in order to |
| get the base value from the alias opcode before we move on to the |
| aliased opcode for encoding. */ |
| inst->value = opcode->opcode; |
| |
| /* No need to do anything else if the opcode does not have any operand. */ |
| if (aarch64_num_of_operands (opcode) == 0) |
| goto encoding_exit; |
| |
| /* Assign operand indexes and check types. Also put the matched |
| operand qualifiers in *QLF_SEQ to return. */ |
| for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i) |
| { |
| assert (opcode->operands[i] == inst->operands[i].type); |
| inst->operands[i].idx = i; |
| if (qlf_seq != NULL) |
| *qlf_seq = inst->operands[i].qualifier; |
| } |
| |
| aliased = aarch64_find_real_opcode (opcode); |
| /* If the opcode is an alias and it does not ask for direct encoding by |
| itself, the instruction will be transformed to the form of real opcode |
| and the encoding will be carried out using the rules for the aliased |
| opcode. */ |
| if (aliased != NULL && (opcode->flags & F_CONV)) |
| { |
| DEBUG_TRACE ("real opcode '%s' has been found for the alias %s", |
| aliased->name, opcode->name); |
| /* Convert the operands to the form of the real opcode. */ |
| convert_to_real (inst, aliased); |
| opcode = aliased; |
| } |
| |
| aarch64_opnd_info *info = inst->operands; |
| |
| /* Call the inserter of each operand. */ |
| for (i = 0; i < AARCH64_MAX_OPND_NUM; ++i, ++info) |
| { |
| const aarch64_operand *opnd; |
| enum aarch64_opnd type = opcode->operands[i]; |
| if (type == AARCH64_OPND_NIL) |
| break; |
| if (info->skip) |
| { |
| DEBUG_TRACE ("skip the incomplete operand %d", i); |
| continue; |
| } |
| opnd = &aarch64_operands[type]; |
| if (operand_has_inserter (opnd) |
| && !aarch64_insert_operand (opnd, info, &inst->value, inst, |
| mismatch_detail)) |
| return false; |
| } |
| |
| /* Call opcode encoders indicated by flags. */ |
| if (opcode_has_special_coder (opcode)) |
| do_special_encoding (inst); |
| |
| /* Possibly use the instruction class to encode the chosen qualifier |
| variant. */ |
| aarch64_encode_variant_using_iclass (inst); |
| |
| /* Run a verifier if the instruction has one set. */ |
| if (opcode->verifier) |
| { |
| enum err_type result = opcode->verifier (inst, *code, 0, true, |
| mismatch_detail, insn_sequence); |
| switch (result) |
| { |
| case ERR_UND: |
| case ERR_UNP: |
| case ERR_NYI: |
| return false; |
| default: |
| break; |
| } |
| } |
| |
| /* Always run constrain verifiers, this is needed because constrains need to |
| maintain a global state. Regardless if the instruction has the flag set |
| or not. */ |
| enum err_type result = verify_constraints (inst, *code, 0, true, |
| mismatch_detail, insn_sequence); |
| switch (result) |
| { |
| case ERR_UND: |
| case ERR_UNP: |
| case ERR_NYI: |
| return false; |
| default: |
| break; |
| } |
| |
| |
| encoding_exit: |
| DEBUG_TRACE ("exit with %s", opcode->name); |
| |
| *code = inst->value; |
| |
| return true; |
| } |