1270 lines
37 KiB
C
1270 lines
37 KiB
C
/* aarch64-asm.c -- AArch64 assembler support.
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Copyright 2012 Free Software Foundation, Inc.
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Contributed by ARM Ltd.
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This file is part of the GNU opcodes library.
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This library is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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It is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING3. If not,
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see <http://www.gnu.org/licenses/>. */
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#include "sysdep.h"
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#include <stdarg.h>
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#include "aarch64-asm.h"
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/* Utilities. */
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/* The unnamed arguments consist of the number of fields and information about
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these fields where the VALUE will be inserted into CODE. MASK can be zero or
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the base mask of the opcode.
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N.B. the fields are required to be in such an order than the least signficant
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field for VALUE comes the first, e.g. the <index> in
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SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]
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is encoded in H:L:M in some cases, the the fields H:L:M should be passed in
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the order of M, L, H. */
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static inline void
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insert_fields (aarch64_insn *code, aarch64_insn value, aarch64_insn mask, ...)
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{
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uint32_t num;
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const aarch64_field *field;
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enum aarch64_field_kind kind;
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va_list va;
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va_start (va, mask);
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num = va_arg (va, uint32_t);
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assert (num <= 5);
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while (num--)
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{
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kind = va_arg (va, enum aarch64_field_kind);
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field = &fields[kind];
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insert_field (kind, code, value, mask);
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value >>= field->width;
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}
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va_end (va);
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}
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/* Operand inserters. */
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/* Insert register number. */
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const char *
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aarch64_ins_regno (const aarch64_operand *self, const aarch64_opnd_info *info,
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aarch64_insn *code,
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const aarch64_inst *inst ATTRIBUTE_UNUSED)
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{
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insert_field (self->fields[0], code, info->reg.regno, 0);
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return NULL;
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}
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/* Insert register number, index and/or other data for SIMD register element
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operand, e.g. the last source operand in
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SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */
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const char *
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aarch64_ins_reglane (const aarch64_operand *self, const aarch64_opnd_info *info,
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aarch64_insn *code, const aarch64_inst *inst)
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{
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/* regno */
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insert_field (self->fields[0], code, info->reglane.regno, inst->opcode->mask);
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/* index and/or type */
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if (inst->opcode->iclass == asisdone || inst->opcode->iclass == asimdins)
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{
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int pos = info->qualifier - AARCH64_OPND_QLF_S_B;
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if (info->type == AARCH64_OPND_En
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&& inst->opcode->operands[0] == AARCH64_OPND_Ed)
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{
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/* index2 for e.g. INS <Vd>.<Ts>[<index1>], <Vn>.<Ts>[<index2>]. */
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assert (info->idx == 1); /* Vn */
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aarch64_insn value = info->reglane.index << pos;
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insert_field (FLD_imm4, code, value, 0);
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}
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else
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{
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/* index and type for e.g. DUP <V><d>, <Vn>.<T>[<index>].
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imm5<3:0> <V>
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0000 RESERVED
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xxx1 B
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xx10 H
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x100 S
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1000 D */
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aarch64_insn value = ((info->reglane.index << 1) | 1) << pos;
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insert_field (FLD_imm5, code, value, 0);
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}
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}
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else
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{
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/* index for e.g. SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]
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or SQDMLAL <Va><d>, <Vb><n>, <Vm>.<Ts>[<index>]. */
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switch (info->qualifier)
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{
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case AARCH64_OPND_QLF_S_H:
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/* H:L:M */
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insert_fields (code, info->reglane.index, 0, 3, FLD_M, FLD_L, FLD_H);
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break;
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case AARCH64_OPND_QLF_S_S:
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/* H:L */
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insert_fields (code, info->reglane.index, 0, 2, FLD_L, FLD_H);
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break;
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case AARCH64_OPND_QLF_S_D:
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/* H */
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insert_field (FLD_H, code, info->reglane.index, 0);
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break;
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default:
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assert (0);
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}
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}
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return NULL;
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}
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/* Insert regno and len field of a register list operand, e.g. Vn in TBL. */
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const char *
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aarch64_ins_reglist (const aarch64_operand *self, const aarch64_opnd_info *info,
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aarch64_insn *code,
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const aarch64_inst *inst ATTRIBUTE_UNUSED)
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{
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/* R */
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insert_field (self->fields[0], code, info->reglist.first_regno, 0);
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/* len */
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insert_field (FLD_len, code, info->reglist.num_regs - 1, 0);
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return NULL;
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}
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/* Insert Rt and opcode fields for a register list operand, e.g. Vt
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in AdvSIMD load/store instructions. */
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const char *
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aarch64_ins_ldst_reglist (const aarch64_operand *self ATTRIBUTE_UNUSED,
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const aarch64_opnd_info *info, aarch64_insn *code,
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const aarch64_inst *inst)
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{
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aarch64_insn value;
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/* Number of elements in each structure to be loaded/stored. */
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unsigned num = get_opcode_dependent_value (inst->opcode);
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/* Rt */
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insert_field (FLD_Rt, code, info->reglist.first_regno, 0);
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/* opcode */
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switch (num)
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{
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case 1:
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switch (info->reglist.num_regs)
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{
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case 1: value = 0x7; break;
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case 2: value = 0xa; break;
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case 3: value = 0x6; break;
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case 4: value = 0x2; break;
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default: assert (0);
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}
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break;
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case 2:
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value = info->reglist.num_regs == 4 ? 0x3 : 0x8;
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break;
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case 3:
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value = 0x4;
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break;
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case 4:
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value = 0x0;
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break;
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default:
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assert (0);
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}
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insert_field (FLD_opcode, code, value, 0);
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return NULL;
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}
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/* Insert Rt and S fields for a register list operand, e.g. Vt in AdvSIMD load
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single structure to all lanes instructions. */
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const char *
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aarch64_ins_ldst_reglist_r (const aarch64_operand *self ATTRIBUTE_UNUSED,
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const aarch64_opnd_info *info, aarch64_insn *code,
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const aarch64_inst *inst)
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{
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aarch64_insn value;
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/* The opcode dependent area stores the number of elements in
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each structure to be loaded/stored. */
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int is_ld1r = get_opcode_dependent_value (inst->opcode) == 1;
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/* Rt */
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insert_field (FLD_Rt, code, info->reglist.first_regno, 0);
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/* S */
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value = (aarch64_insn) 0;
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if (is_ld1r && info->reglist.num_regs == 2)
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/* OP_LD1R does not have alternating variant, but have "two consecutive"
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instead. */
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value = (aarch64_insn) 1;
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insert_field (FLD_S, code, value, 0);
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return NULL;
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}
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/* Insert Q, opcode<2:1>, S, size and Rt fields for a register element list
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operand e.g. Vt in AdvSIMD load/store single element instructions. */
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const char *
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aarch64_ins_ldst_elemlist (const aarch64_operand *self ATTRIBUTE_UNUSED,
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const aarch64_opnd_info *info, aarch64_insn *code,
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const aarch64_inst *inst ATTRIBUTE_UNUSED)
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{
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aarch64_field field = {0, 0};
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aarch64_insn QSsize; /* fields Q:S:size. */
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aarch64_insn opcodeh2; /* opcode<2:1> */
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assert (info->reglist.has_index);
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/* Rt */
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insert_field (FLD_Rt, code, info->reglist.first_regno, 0);
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/* Encode the index, opcode<2:1> and size. */
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switch (info->qualifier)
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{
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case AARCH64_OPND_QLF_S_B:
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/* Index encoded in "Q:S:size". */
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QSsize = info->reglist.index;
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opcodeh2 = 0x0;
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break;
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case AARCH64_OPND_QLF_S_H:
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/* Index encoded in "Q:S:size<1>". */
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QSsize = info->reglist.index << 1;
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opcodeh2 = 0x1;
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break;
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case AARCH64_OPND_QLF_S_S:
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/* Index encoded in "Q:S". */
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QSsize = info->reglist.index << 2;
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opcodeh2 = 0x2;
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break;
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case AARCH64_OPND_QLF_S_D:
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/* Index encoded in "Q". */
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QSsize = info->reglist.index << 3 | 0x1;
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opcodeh2 = 0x2;
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break;
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default:
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assert (0);
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}
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insert_fields (code, QSsize, 0, 3, FLD_vldst_size, FLD_S, FLD_Q);
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gen_sub_field (FLD_asisdlso_opcode, 1, 2, &field);
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insert_field_2 (&field, code, opcodeh2, 0);
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return NULL;
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}
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/* Insert fields immh:immb and/or Q for e.g. the shift immediate in
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SSHR <Vd>.<T>, <Vn>.<T>, #<shift>
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or SSHR <V><d>, <V><n>, #<shift>. */
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const char *
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aarch64_ins_advsimd_imm_shift (const aarch64_operand *self ATTRIBUTE_UNUSED,
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const aarch64_opnd_info *info,
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aarch64_insn *code, const aarch64_inst *inst)
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{
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unsigned val = aarch64_get_qualifier_standard_value (info->qualifier);
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aarch64_insn Q, imm;
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if (inst->opcode->iclass == asimdshf)
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{
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/* Q
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immh Q <T>
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0000 x SEE AdvSIMD modified immediate
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0001 0 8B
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0001 1 16B
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001x 0 4H
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001x 1 8H
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01xx 0 2S
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01xx 1 4S
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1xxx 0 RESERVED
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1xxx 1 2D */
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Q = (val & 0x1) ? 1 : 0;
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insert_field (FLD_Q, code, Q, inst->opcode->mask);
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val >>= 1;
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}
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assert (info->type == AARCH64_OPND_IMM_VLSR
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|| info->type == AARCH64_OPND_IMM_VLSL);
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if (info->type == AARCH64_OPND_IMM_VLSR)
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/* immh:immb
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immh <shift>
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0000 SEE AdvSIMD modified immediate
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0001 (16-UInt(immh:immb))
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001x (32-UInt(immh:immb))
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01xx (64-UInt(immh:immb))
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1xxx (128-UInt(immh:immb)) */
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imm = (16 << (unsigned)val) - info->imm.value;
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else
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/* immh:immb
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immh <shift>
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0000 SEE AdvSIMD modified immediate
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0001 (UInt(immh:immb)-8)
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001x (UInt(immh:immb)-16)
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01xx (UInt(immh:immb)-32)
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1xxx (UInt(immh:immb)-64) */
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imm = info->imm.value + (8 << (unsigned)val);
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insert_fields (code, imm, 0, 2, FLD_immb, FLD_immh);
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return NULL;
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}
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/* Insert fields for e.g. the immediate operands in
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BFM <Wd>, <Wn>, #<immr>, #<imms>. */
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const char *
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aarch64_ins_imm (const aarch64_operand *self, const aarch64_opnd_info *info,
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aarch64_insn *code,
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const aarch64_inst *inst ATTRIBUTE_UNUSED)
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{
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int64_t imm;
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/* Maximum of two fields to insert. */
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assert (self->fields[2] == FLD_NIL);
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imm = info->imm.value;
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if (operand_need_shift_by_two (self))
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imm >>= 2;
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if (self->fields[1] == FLD_NIL)
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insert_field (self->fields[0], code, imm, 0);
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else
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/* e.g. TBZ b5:b40. */
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insert_fields (code, imm, 0, 2, self->fields[1], self->fields[0]);
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return NULL;
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}
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/* Insert immediate and its shift amount for e.g. the last operand in
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MOVZ <Wd>, #<imm16>{, LSL #<shift>}. */
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const char *
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aarch64_ins_imm_half (const aarch64_operand *self, const aarch64_opnd_info *info,
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aarch64_insn *code, const aarch64_inst *inst)
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{
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/* imm16 */
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aarch64_ins_imm (self, info, code, inst);
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/* hw */
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insert_field (FLD_hw, code, info->shifter.amount >> 4, 0);
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return NULL;
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}
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/* Insert cmode and "a:b:c:d:e:f:g:h" fields for e.g. the last operand in
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MOVI <Vd>.<T>, #<imm8> {, LSL #<amount>}. */
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const char *
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aarch64_ins_advsimd_imm_modified (const aarch64_operand *self ATTRIBUTE_UNUSED,
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const aarch64_opnd_info *info,
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aarch64_insn *code,
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const aarch64_inst *inst ATTRIBUTE_UNUSED)
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{
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enum aarch64_opnd_qualifier opnd0_qualifier = inst->operands[0].qualifier;
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uint64_t imm = info->imm.value;
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enum aarch64_modifier_kind kind = info->shifter.kind;
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int amount = info->shifter.amount;
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aarch64_field field = {0, 0};
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/* a:b:c:d:e:f:g:h */
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if (!info->imm.is_fp && aarch64_get_qualifier_esize (opnd0_qualifier) == 8)
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{
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/* Either MOVI <Dd>, #<imm>
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or MOVI <Vd>.2D, #<imm>.
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<imm> is a 64-bit immediate
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"aaaaaaaabbbbbbbbccccccccddddddddeeeeeeeeffffffffgggggggghhhhhhhh",
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encoded in "a:b:c:d:e:f:g:h". */
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imm = aarch64_shrink_expanded_imm8 (imm);
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assert ((int)imm >= 0);
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}
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assert (imm <= 255);
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insert_fields (code, imm, 0, 2, FLD_defgh, FLD_abc);
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if (kind == AARCH64_MOD_NONE)
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return NULL;
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/* shift amount partially in cmode */
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assert (kind == AARCH64_MOD_LSL || kind == AARCH64_MOD_MSL);
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if (kind == AARCH64_MOD_LSL)
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{
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/* AARCH64_MOD_LSL: shift zeros. */
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int esize = aarch64_get_qualifier_esize (opnd0_qualifier);
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assert (esize == 4 || esize == 2);
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amount >>= 3;
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if (esize == 4)
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gen_sub_field (FLD_cmode, 1, 2, &field); /* per word */
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else
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gen_sub_field (FLD_cmode, 1, 1, &field); /* per halfword */
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}
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else
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{
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/* AARCH64_MOD_MSL: shift ones. */
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amount >>= 4;
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gen_sub_field (FLD_cmode, 0, 1, &field); /* per word */
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}
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insert_field_2 (&field, code, amount, 0);
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return NULL;
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}
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/* Insert #<fbits> for the immediate operand in fp fix-point instructions,
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e.g. SCVTF <Dd>, <Wn>, #<fbits>. */
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const char *
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aarch64_ins_fbits (const aarch64_operand *self, const aarch64_opnd_info *info,
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aarch64_insn *code,
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const aarch64_inst *inst ATTRIBUTE_UNUSED)
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{
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insert_field (self->fields[0], code, 64 - info->imm.value, 0);
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return NULL;
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}
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/* Insert arithmetic immediate for e.g. the last operand in
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SUBS <Wd>, <Wn|WSP>, #<imm> {, <shift>}. */
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const char *
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aarch64_ins_aimm (const aarch64_operand *self, const aarch64_opnd_info *info,
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aarch64_insn *code, const aarch64_inst *inst ATTRIBUTE_UNUSED)
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{
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/* shift */
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aarch64_insn value = info->shifter.amount ? 1 : 0;
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insert_field (self->fields[0], code, value, 0);
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/* imm12 (unsigned) */
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insert_field (self->fields[1], code, info->imm.value, 0);
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return NULL;
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}
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/* Insert logical/bitmask immediate for e.g. the last operand in
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ORR <Wd|WSP>, <Wn>, #<imm>. */
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const char *
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aarch64_ins_limm (const aarch64_operand *self, const aarch64_opnd_info *info,
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aarch64_insn *code, const aarch64_inst *inst ATTRIBUTE_UNUSED)
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{
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aarch64_insn value;
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uint64_t imm = info->imm.value;
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int is32 = aarch64_get_qualifier_esize (inst->operands[0].qualifier) == 4;
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if (inst->opcode->op == OP_BIC)
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imm = ~imm;
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if (aarch64_logical_immediate_p (imm, is32, &value) == FALSE)
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/* The constraint check should have guaranteed this wouldn't happen. */
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assert (0);
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insert_fields (code, value, 0, 3, self->fields[2], self->fields[1],
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self->fields[0]);
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return NULL;
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}
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/* Encode Ft for e.g. STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]
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or LDP <Qt1>, <Qt2>, [<Xn|SP>], #<imm>. */
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const char *
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aarch64_ins_ft (const aarch64_operand *self, const aarch64_opnd_info *info,
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aarch64_insn *code, const aarch64_inst *inst)
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{
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aarch64_insn value;
|
|
|
|
assert (info->idx == 0);
|
|
|
|
/* Rt */
|
|
aarch64_ins_regno (self, info, code, inst);
|
|
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: assert (0);
|
|
}
|
|
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 NULL;
|
|
}
|
|
|
|
/* Encode the address operand for e.g. STXRB <Ws>, <Wt>, [<Xn|SP>{,#0}]. */
|
|
const char *
|
|
aarch64_ins_addr_simple (const aarch64_operand *self ATTRIBUTE_UNUSED,
|
|
const aarch64_opnd_info *info, aarch64_insn *code,
|
|
const aarch64_inst *inst ATTRIBUTE_UNUSED)
|
|
{
|
|
/* Rn */
|
|
insert_field (FLD_Rn, code, info->addr.base_regno, 0);
|
|
return NULL;
|
|
}
|
|
|
|
/* Encode the address operand for e.g.
|
|
STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */
|
|
const char *
|
|
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_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 NULL;
|
|
}
|
|
|
|
/* Encode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>, #<simm>]!. */
|
|
const char *
|
|
aarch64_ins_addr_simm (const aarch64_operand *self,
|
|
const aarch64_opnd_info *info,
|
|
aarch64_insn *code,
|
|
const aarch64_inst *inst 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)
|
|
/* 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 NULL;
|
|
}
|
|
|
|
/* Encode the address operand for e.g. LDRSW <Xt>, [<Xn|SP>{, #<pimm>}]. */
|
|
const char *
|
|
aarch64_ins_addr_uimm12 (const aarch64_operand *self,
|
|
const aarch64_opnd_info *info,
|
|
aarch64_insn *code,
|
|
const aarch64_inst *inst 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 NULL;
|
|
}
|
|
|
|
/* Encode the address operand for e.g.
|
|
LD1 {<Vt>.<T>, <Vt2>.<T>, <Vt3>.<T>}, [<Xn|SP>], <Xm|#<amount>>. */
|
|
const char *
|
|
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)
|
|
{
|
|
/* 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 NULL;
|
|
}
|
|
|
|
/* Encode the condition operand for e.g. CSEL <Xd>, <Xn>, <Xm>, <cond>. */
|
|
const char *
|
|
aarch64_ins_cond (const aarch64_operand *self ATTRIBUTE_UNUSED,
|
|
const aarch64_opnd_info *info, aarch64_insn *code,
|
|
const aarch64_inst *inst ATTRIBUTE_UNUSED)
|
|
{
|
|
/* cond */
|
|
insert_field (FLD_cond, code, info->cond->value, 0);
|
|
return NULL;
|
|
}
|
|
|
|
/* Encode the system register operand for e.g. MRS <Xt>, <systemreg>. */
|
|
const char *
|
|
aarch64_ins_sysreg (const aarch64_operand *self ATTRIBUTE_UNUSED,
|
|
const aarch64_opnd_info *info, aarch64_insn *code,
|
|
const aarch64_inst *inst ATTRIBUTE_UNUSED)
|
|
{
|
|
/* op0:op1:CRn:CRm:op2 */
|
|
insert_fields (code, info->sysreg, inst->opcode->mask, 5,
|
|
FLD_op2, FLD_CRm, FLD_CRn, FLD_op1, FLD_op0);
|
|
return NULL;
|
|
}
|
|
|
|
/* Encode the PSTATE field operand for e.g. MSR <pstatefield>, #<imm>. */
|
|
const char *
|
|
aarch64_ins_pstatefield (const aarch64_operand *self ATTRIBUTE_UNUSED,
|
|
const aarch64_opnd_info *info, aarch64_insn *code,
|
|
const aarch64_inst *inst ATTRIBUTE_UNUSED)
|
|
{
|
|
/* op1:op2 */
|
|
insert_fields (code, info->pstatefield, inst->opcode->mask, 2,
|
|
FLD_op2, FLD_op1);
|
|
return NULL;
|
|
}
|
|
|
|
/* Encode the system instruction op operand for e.g. AT <at_op>, <Xt>. */
|
|
const char *
|
|
aarch64_ins_sysins_op (const aarch64_operand *self ATTRIBUTE_UNUSED,
|
|
const aarch64_opnd_info *info, aarch64_insn *code,
|
|
const aarch64_inst *inst 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 NULL;
|
|
}
|
|
|
|
/* Encode the memory barrier option operand for e.g. DMB <option>|#<imm>. */
|
|
|
|
const char *
|
|
aarch64_ins_barrier (const aarch64_operand *self ATTRIBUTE_UNUSED,
|
|
const aarch64_opnd_info *info, aarch64_insn *code,
|
|
const aarch64_inst *inst ATTRIBUTE_UNUSED)
|
|
{
|
|
/* CRm */
|
|
insert_field (FLD_CRm, code, info->barrier->value, 0);
|
|
return NULL;
|
|
}
|
|
|
|
/* Encode the prefetch operation option operand for e.g.
|
|
PRFM <prfop>, [<Xn|SP>{, #<pimm>}]. */
|
|
|
|
const char *
|
|
aarch64_ins_prfop (const aarch64_operand *self ATTRIBUTE_UNUSED,
|
|
const aarch64_opnd_info *info, aarch64_insn *code,
|
|
const aarch64_inst *inst ATTRIBUTE_UNUSED)
|
|
{
|
|
/* prfop in Rt */
|
|
insert_field (FLD_Rt, code, info->prfop->value, 0);
|
|
return NULL;
|
|
}
|
|
|
|
/* Encode the extended register operand for e.g.
|
|
STR <Qt>, [<Xn|SP>, <R><m>{, <extend> {<amount>}}]. */
|
|
const char *
|
|
aarch64_ins_reg_extended (const aarch64_operand *self ATTRIBUTE_UNUSED,
|
|
const aarch64_opnd_info *info, aarch64_insn *code,
|
|
const aarch64_inst *inst 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, code, info->shifter.amount, 0);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Encode the shifted register operand for e.g.
|
|
SUBS <Xd>, <Xn>, <Xm> {, <shift> #<amount>}. */
|
|
const char *
|
|
aarch64_ins_reg_shifted (const aarch64_operand *self ATTRIBUTE_UNUSED,
|
|
const aarch64_opnd_info *info, aarch64_insn *code,
|
|
const aarch64_inst *inst 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, code, info->shifter.amount, 0);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* 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;
|
|
|
|
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:
|
|
assert (0);
|
|
}
|
|
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;
|
|
}
|
|
|
|
/* Do miscellaneous encodings that are not common enough to be driven by
|
|
flags. */
|
|
|
|
static void
|
|
do_misc_encoding (aarch64_inst *inst)
|
|
{
|
|
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;
|
|
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;
|
|
|
|
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_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: assert (0);
|
|
}
|
|
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_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);
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
|
|
/* 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:
|
|
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;
|
|
|
|
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:
|
|
assert (0);
|
|
}
|
|
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. */
|
|
assert (0);
|
|
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_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;
|
|
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. */
|
|
|
|
int
|
|
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)
|
|
{
|
|
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);
|
|
}
|
|
|
|
/* Call opcode encoders indicated by flags. */
|
|
if (opcode_has_special_coder (opcode))
|
|
do_special_encoding (inst);
|
|
|
|
encoding_exit:
|
|
DEBUG_TRACE ("exit with %s", opcode->name);
|
|
|
|
*code = inst->value;
|
|
|
|
return 1;
|
|
}
|