1 /* aarch64-opc.h -- Header file for aarch64-opc.c and aarch64-opc-2.c.
2 Copyright 2012 Free Software Foundation, Inc.
3 Contributed by ARM Ltd.
5 This file is part of the GNU opcodes library.
7 This library is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3, or (at your option)
12 It is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; see the file COPYING3. If not,
19 see <http://www.gnu.org/licenses/>. */
21 #ifndef OPCODES_AARCH64_OPC_H
22 #define OPCODES_AARCH64_OPC_H
25 #include "opcode/aarch64.h"
27 /* Instruction fields.
28 Keep synced with fields. */
29 enum aarch64_field_kind
95 /* Field description. */
102 typedef struct aarch64_field aarch64_field;
104 extern const aarch64_field fields[];
106 /* Operand description. */
108 struct aarch64_operand
110 enum aarch64_operand_class op_class;
112 /* Name of the operand code; used mainly for the purpose of internal
118 /* The associated instruction bit-fields; no operand has more than 4
120 enum aarch64_field_kind fields[4];
122 /* Brief description */
126 typedef struct aarch64_operand aarch64_operand;
128 extern const aarch64_operand aarch64_operands[];
132 #define OPD_F_HAS_INSERTER 0x00000001
133 #define OPD_F_HAS_EXTRACTOR 0x00000002
134 #define OPD_F_SEXT 0x00000004 /* Require sign-extension. */
135 #define OPD_F_SHIFT_BY_2 0x00000008 /* Need to left shift the field
136 value by 2 to get the value
137 of an immediate operand. */
138 #define OPD_F_MAYBE_SP 0x00000010 /* May potentially be SP. */
140 static inline bfd_boolean
141 operand_has_inserter (const aarch64_operand *operand)
143 return (operand->flags & OPD_F_HAS_INSERTER) ? TRUE : FALSE;
146 static inline bfd_boolean
147 operand_has_extractor (const aarch64_operand *operand)
149 return (operand->flags & OPD_F_HAS_EXTRACTOR) ? TRUE : FALSE;
152 static inline bfd_boolean
153 operand_need_sign_extension (const aarch64_operand *operand)
155 return (operand->flags & OPD_F_SEXT) ? TRUE : FALSE;
158 static inline bfd_boolean
159 operand_need_shift_by_two (const aarch64_operand *operand)
161 return (operand->flags & OPD_F_SHIFT_BY_2) ? TRUE : FALSE;
164 static inline bfd_boolean
165 operand_maybe_stack_pointer (const aarch64_operand *operand)
167 return (operand->flags & OPD_F_MAYBE_SP) ? TRUE : FALSE;
170 /* Return the total width of the operand *OPERAND. */
171 static inline unsigned
172 get_operand_fields_width (const aarch64_operand *operand)
176 while (operand->fields[i] != FLD_NIL)
177 width += fields[operand->fields[i++]].width;
178 assert (width > 0 && width < 32);
182 static inline const aarch64_operand *
183 get_operand_from_code (enum aarch64_opnd code)
185 return aarch64_operands + code;
188 /* Operand qualifier and operand constraint checking. */
190 int aarch64_match_operands_constraint (aarch64_inst *,
191 aarch64_operand_error *);
193 /* Operand qualifier related functions. */
194 const char* aarch64_get_qualifier_name (aarch64_opnd_qualifier_t);
195 unsigned char aarch64_get_qualifier_nelem (aarch64_opnd_qualifier_t);
196 aarch64_insn aarch64_get_qualifier_standard_value (aarch64_opnd_qualifier_t);
197 int aarch64_find_best_match (const aarch64_inst *,
198 const aarch64_opnd_qualifier_seq_t *,
199 int, aarch64_opnd_qualifier_t *);
202 reset_operand_qualifier (aarch64_inst *inst, int idx)
204 assert (idx >=0 && idx < aarch64_num_of_operands (inst->opcode));
205 inst->operands[idx].qualifier = AARCH64_OPND_QLF_NIL;
208 /* Inline functions operating on instruction bit-field(s). */
210 /* Generate a mask that has WIDTH number of consecutive 1s. */
212 static inline aarch64_insn
215 return ((aarch64_insn) 1 << width) - 1;
218 /* LSB_REL is the relative location of the lsb in the sub field, starting from 0. */
220 gen_sub_field (enum aarch64_field_kind kind, int lsb_rel, int width, aarch64_field *ret)
222 const aarch64_field *field = &fields[kind];
223 if (lsb_rel < 0 || width <= 0 || lsb_rel + width > field->width)
225 ret->lsb = field->lsb + lsb_rel;
230 /* Insert VALUE into FIELD of CODE. MASK can be zero or the base mask
234 insert_field_2 (const aarch64_field *field, aarch64_insn *code,
235 aarch64_insn value, aarch64_insn mask)
237 assert (field->width < 32 && field->width >= 1 && field->lsb >= 0
238 && field->lsb + field->width <= 32);
239 value &= gen_mask (field->width);
240 value <<= field->lsb;
241 /* In some opcodes, field can be part of the base opcode, e.g. the size
242 field in FADD. The following helps avoid corrupt the base opcode. */
247 /* Extract FIELD of CODE and return the value. MASK can be zero or the base
248 mask of the opcode. */
250 static inline aarch64_insn
251 extract_field_2 (const aarch64_field *field, aarch64_insn code,
255 /* Clear any bit that is a part of the base opcode. */
257 value = (code >> field->lsb) & gen_mask (field->width);
261 /* Insert VALUE into field KIND of CODE. MASK can be zero or the base mask
265 insert_field (enum aarch64_field_kind kind, aarch64_insn *code,
266 aarch64_insn value, aarch64_insn mask)
268 insert_field_2 (&fields[kind], code, value, mask);
271 /* Extract field KIND of CODE and return the value. MASK can be zero or the
272 base mask of the opcode. */
274 static inline aarch64_insn
275 extract_field (enum aarch64_field_kind kind, aarch64_insn code,
278 return extract_field_2 (&fields[kind], code, mask);
281 /* Inline functions selecting operand to do the encoding/decoding for a
282 certain instruction bit-field. */
284 /* Select the operand to do the encoding/decoding of the 'sf' field.
285 The heuristic-based rule is that the result operand is respected more. */
288 select_operand_for_sf_field_coding (const aarch64_opcode *opcode)
291 if (aarch64_get_operand_class (opcode->operands[0])
292 == AARCH64_OPND_CLASS_INT_REG)
295 else if (aarch64_get_operand_class (opcode->operands[1])
296 == AARCH64_OPND_CLASS_INT_REG)
297 /* e.g. float2fix. */
300 { assert (0); abort (); }
304 /* Select the operand to do the encoding/decoding of the 'type' field in
305 the floating-point instructions.
306 The heuristic-based rule is that the source operand is respected more. */
309 select_operand_for_fptype_field_coding (const aarch64_opcode *opcode)
312 if (aarch64_get_operand_class (opcode->operands[1])
313 == AARCH64_OPND_CLASS_FP_REG)
316 else if (aarch64_get_operand_class (opcode->operands[0])
317 == AARCH64_OPND_CLASS_FP_REG)
318 /* e.g. float2fix. */
321 { assert (0); abort (); }
325 /* Select the operand to do the encoding/decoding of the 'size' field in
326 the AdvSIMD scalar instructions.
327 The heuristic-based rule is that the destination operand is respected
331 select_operand_for_scalar_size_field_coding (const aarch64_opcode *opcode)
333 int src_size = 0, dst_size = 0;
334 if (aarch64_get_operand_class (opcode->operands[0])
335 == AARCH64_OPND_CLASS_SISD_REG)
336 dst_size = aarch64_get_qualifier_esize (opcode->qualifiers_list[0][0]);
337 if (aarch64_get_operand_class (opcode->operands[1])
338 == AARCH64_OPND_CLASS_SISD_REG)
339 src_size = aarch64_get_qualifier_esize (opcode->qualifiers_list[0][1]);
340 if (src_size == dst_size && src_size == 0)
341 { assert (0); abort (); }
342 /* When the result is not a sisd register or it is a long operantion. */
343 if (dst_size == 0 || dst_size == src_size << 1)
349 /* Select the operand to do the encoding/decoding of the 'size:Q' fields in
350 the AdvSIMD instructions. */
352 int aarch64_select_operand_for_sizeq_field_coding (const aarch64_opcode *);
356 aarch64_insn aarch64_get_operand_modifier_value (enum aarch64_modifier_kind);
357 enum aarch64_modifier_kind
358 aarch64_get_operand_modifier_from_value (aarch64_insn, bfd_boolean);
361 bfd_boolean aarch64_wide_constant_p (int64_t, int, unsigned int *);
362 bfd_boolean aarch64_logical_immediate_p (uint64_t, int, aarch64_insn *);
363 int aarch64_shrink_expanded_imm8 (uint64_t);
365 /* Copy the content of INST->OPERANDS[SRC] to INST->OPERANDS[DST]. */
367 copy_operand_info (aarch64_inst *inst, int dst, int src)
369 assert (dst >= 0 && src >= 0 && dst < AARCH64_MAX_OPND_NUM
370 && src < AARCH64_MAX_OPND_NUM);
371 memcpy (&inst->operands[dst], &inst->operands[src],
372 sizeof (aarch64_opnd_info));
373 inst->operands[dst].idx = dst;
376 /* A primitive log caculator. */
378 static inline unsigned int
379 get_logsz (unsigned int size)
381 const unsigned char ls[16] =
382 {0, 1, -1, 2, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1, 4};
388 assert (ls[size - 1] != (unsigned char)-1);
392 #endif /* OPCODES_AARCH64_OPC_H */