[thirdparty/binutils-gdb.git] / opcodes / aarch64-opc.h

/* aarch64-opc.h -- Header file for aarch64-opc.c and aarch64-opc-2.c.
   Copyright (C) 2012-2016 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/>.  */

#ifndef OPCODES_AARCH64_OPC_H
#define OPCODES_AARCH64_OPC_H

#include <string.h>
#include "opcode/aarch64.h"

/* Instruction fields.
   Keep synced with fields.  */
enum aarch64_field_kind
{
  FLD_NIL,
  FLD_cond2,
  FLD_nzcv,
  FLD_defgh,
  FLD_abc,
  FLD_imm19,
  FLD_immhi,
  FLD_immlo,
  FLD_size,
  FLD_vldst_size,
  FLD_op,
  FLD_Q,
  FLD_Rt,
  FLD_Rd,
  FLD_Rn,
  FLD_Rt2,
  FLD_Ra,
  FLD_op2,
  FLD_CRm,
  FLD_CRn,
  FLD_op1,
  FLD_op0,
  FLD_imm3,
  FLD_cond,
  FLD_opcode,
  FLD_cmode,
  FLD_asisdlso_opcode,
  FLD_len,
  FLD_Rm,
  FLD_Rs,
  FLD_option,
  FLD_S,
  FLD_hw,
  FLD_opc,
  FLD_opc1,
  FLD_shift,
  FLD_type,
  FLD_ldst_size,
  FLD_imm6,
  FLD_imm4,
  FLD_imm5,
  FLD_imm7,
  FLD_imm8,
  FLD_imm9,
  FLD_imm12,
  FLD_imm14,
  FLD_imm16,
  FLD_imm26,
  FLD_imms,
  FLD_immr,
  FLD_immb,
  FLD_immh,
  FLD_N,
  FLD_index,
  FLD_index2,
  FLD_sf,
  FLD_lse_sz,
  FLD_H,
  FLD_L,
  FLD_M,
  FLD_b5,
  FLD_b40,
  FLD_scale,
  FLD_SVE_N,
  FLD_SVE_Pd,
  FLD_SVE_Pg3,
  FLD_SVE_Pg4_5,
  FLD_SVE_Pg4_10,
  FLD_SVE_Pg4_16,
  FLD_SVE_Pm,
  FLD_SVE_Pn,
  FLD_SVE_Pt,
  FLD_SVE_Za_5,
  FLD_SVE_Za_16,
  FLD_SVE_Zd,
  FLD_SVE_Zm_5,
  FLD_SVE_Zm_16,
  FLD_SVE_Zn,
  FLD_SVE_Zt,
  FLD_SVE_i1,
  FLD_SVE_imm3,
  FLD_SVE_imm4,
  FLD_SVE_imm5,
  FLD_SVE_imm5b,
  FLD_SVE_imm6,
  FLD_SVE_imm7,
  FLD_SVE_imm8,
  FLD_SVE_imm9,
  FLD_SVE_immr,
  FLD_SVE_imms,
  FLD_SVE_msz,
  FLD_SVE_pattern,
  FLD_SVE_prfop,
  FLD_SVE_tszh,
  FLD_SVE_xs_14,
  FLD_SVE_xs_22,
};

/* Field description.  */
struct aarch64_field
{
  int lsb;
  int width;
};

typedef struct aarch64_field aarch64_field;

extern const aarch64_field fields[];
\f
/* Operand description.  */

struct aarch64_operand
{
  enum aarch64_operand_class op_class;

  /* Name of the operand code; used mainly for the purpose of internal
     debugging.  */
  const char *name;

  unsigned int flags;

  /* The associated instruction bit-fields; no operand has more than 4
     bit-fields */
  enum aarch64_field_kind fields[4];

  /* Brief description */
  const char *desc;
};

typedef struct aarch64_operand aarch64_operand;

extern const aarch64_operand aarch64_operands[];

/* Operand flags.  */

#define OPD_F_HAS_INSERTER	0x00000001
#define OPD_F_HAS_EXTRACTOR	0x00000002
#define OPD_F_SEXT		0x00000004	/* Require sign-extension.  */
#define OPD_F_SHIFT_BY_2	0x00000008	/* Need to left shift the field
						   value by 2 to get the value
						   of an immediate operand.  */
#define OPD_F_MAYBE_SP		0x00000010	/* May potentially be SP.  */
#define OPD_F_OD_MASK		0x00000060	/* Operand-dependent data.  */
#define OPD_F_OD_LSB		5
#define OPD_F_NO_ZR		0x00000080	/* ZR index not allowed.  */

static inline bfd_boolean
operand_has_inserter (const aarch64_operand *operand)
{
  return (operand->flags & OPD_F_HAS_INSERTER) ? TRUE : FALSE;
}

static inline bfd_boolean
operand_has_extractor (const aarch64_operand *operand)
{
  return (operand->flags & OPD_F_HAS_EXTRACTOR) ? TRUE : FALSE;
}

static inline bfd_boolean
operand_need_sign_extension (const aarch64_operand *operand)
{
  return (operand->flags & OPD_F_SEXT) ? TRUE : FALSE;
}

static inline bfd_boolean
operand_need_shift_by_two (const aarch64_operand *operand)
{
  return (operand->flags & OPD_F_SHIFT_BY_2) ? TRUE : FALSE;
}

static inline bfd_boolean
operand_maybe_stack_pointer (const aarch64_operand *operand)
{
  return (operand->flags & OPD_F_MAYBE_SP) ? TRUE : FALSE;
}

/* Return the value of the operand-specific data field (OPD_F_OD_MASK).  */
static inline unsigned int
get_operand_specific_data (const aarch64_operand *operand)
{
  return (operand->flags & OPD_F_OD_MASK) >> OPD_F_OD_LSB;
}

/* Return the total width of the operand *OPERAND.  */
static inline unsigned
get_operand_fields_width (const aarch64_operand *operand)
{
  int i = 0;
  unsigned width = 0;
  while (operand->fields[i] != FLD_NIL)
    width += fields[operand->fields[i++]].width;
  assert (width > 0 && width < 32);
  return width;
}

static inline const aarch64_operand *
get_operand_from_code (enum aarch64_opnd code)
{
  return aarch64_operands + code;
}
\f
/* Operand qualifier and operand constraint checking.  */

int aarch64_match_operands_constraint (aarch64_inst *,
				       aarch64_operand_error *);

/* Operand qualifier related functions.  */
const char* aarch64_get_qualifier_name (aarch64_opnd_qualifier_t);
unsigned char aarch64_get_qualifier_nelem (aarch64_opnd_qualifier_t);
aarch64_insn aarch64_get_qualifier_standard_value (aarch64_opnd_qualifier_t);
int aarch64_find_best_match (const aarch64_inst *,
			     const aarch64_opnd_qualifier_seq_t *,
			     int, aarch64_opnd_qualifier_t *);

static inline void
reset_operand_qualifier (aarch64_inst *inst, int idx)
{
  assert (idx >=0 && idx < aarch64_num_of_operands (inst->opcode));
  inst->operands[idx].qualifier = AARCH64_OPND_QLF_NIL;
}
\f
/* Inline functions operating on instruction bit-field(s).  */

/* Generate a mask that has WIDTH number of consecutive 1s.  */

static inline aarch64_insn
gen_mask (int width)
{
  return ((aarch64_insn) 1 << width) - 1;
}

/* LSB_REL is the relative location of the lsb in the sub field, starting from 0.  */
static inline int
gen_sub_field (enum aarch64_field_kind kind, int lsb_rel, int width, aarch64_field *ret)
{
  const aarch64_field *field = &fields[kind];
  if (lsb_rel < 0 || width <= 0 || lsb_rel + width > field->width)
    return 0;
  ret->lsb = field->lsb + lsb_rel;
  ret->width = width;
  return 1;
}

/* Insert VALUE into FIELD of CODE.  MASK can be zero or the base mask
   of the opcode.  */

static inline void
insert_field_2 (const aarch64_field *field, aarch64_insn *code,
		aarch64_insn value, aarch64_insn mask)
{
  assert (field->width < 32 && field->width >= 1 && field->lsb >= 0
	  && field->lsb + field->width <= 32);
  value &= gen_mask (field->width);
  value <<= field->lsb;
  /* In some opcodes, field can be part of the base opcode, e.g. the size
     field in FADD.  The following helps avoid corrupt the base opcode.  */
  value &= ~mask;
  *code |= value;
}

/* Extract FIELD of CODE and return the value.  MASK can be zero or the base
   mask of the opcode.  */

static inline aarch64_insn
extract_field_2 (const aarch64_field *field, aarch64_insn code,
		 aarch64_insn mask)
{
  aarch64_insn value;
  /* Clear any bit that is a part of the base opcode.  */
  code &= ~mask;
  value = (code >> field->lsb) & gen_mask (field->width);
  return value;
}

/* Insert VALUE into field KIND of CODE.  MASK can be zero or the base mask
   of the opcode.  */

static inline void
insert_field (enum aarch64_field_kind kind, aarch64_insn *code,
	      aarch64_insn value, aarch64_insn mask)
{
  insert_field_2 (&fields[kind], code, value, mask);
}

/* Extract field KIND of CODE and return the value.  MASK can be zero or the
   base mask of the opcode.  */

static inline aarch64_insn
extract_field (enum aarch64_field_kind kind, aarch64_insn code,
	       aarch64_insn mask)
{
  return extract_field_2 (&fields[kind], code, mask);
}
\f
/* Inline functions selecting operand to do the encoding/decoding for a
   certain instruction bit-field.  */

/* Select the operand to do the encoding/decoding of the 'sf' field.
   The heuristic-based rule is that the result operand is respected more.  */

static inline int
select_operand_for_sf_field_coding (const aarch64_opcode *opcode)
{
  int idx = -1;
  if (aarch64_get_operand_class (opcode->operands[0])
      == AARCH64_OPND_CLASS_INT_REG)
    /* normal case.  */
    idx = 0;
  else if (aarch64_get_operand_class (opcode->operands[1])
	   == AARCH64_OPND_CLASS_INT_REG)
    /* e.g. float2fix.  */
    idx = 1;
  else
    { assert (0); abort (); }
  return idx;
}

/* Select the operand to do the encoding/decoding of the 'type' field in
   the floating-point instructions.
   The heuristic-based rule is that the source operand is respected more.  */

static inline int
select_operand_for_fptype_field_coding (const aarch64_opcode *opcode)
{
  int idx;
  if (aarch64_get_operand_class (opcode->operands[1])
      == AARCH64_OPND_CLASS_FP_REG)
    /* normal case.  */
    idx = 1;
  else if (aarch64_get_operand_class (opcode->operands[0])
	   == AARCH64_OPND_CLASS_FP_REG)
    /* e.g. float2fix.  */
    idx = 0;
  else
    { assert (0); abort (); }
  return idx;
}

/* Select the operand to do the encoding/decoding of the 'size' field in
   the AdvSIMD scalar instructions.
   The heuristic-based rule is that the destination operand is respected
   more.  */

static inline int
select_operand_for_scalar_size_field_coding (const aarch64_opcode *opcode)
{
  int src_size = 0, dst_size = 0;
  if (aarch64_get_operand_class (opcode->operands[0])
      == AARCH64_OPND_CLASS_SISD_REG)
    dst_size = aarch64_get_qualifier_esize (opcode->qualifiers_list[0][0]);
  if (aarch64_get_operand_class (opcode->operands[1])
      == AARCH64_OPND_CLASS_SISD_REG)
    src_size = aarch64_get_qualifier_esize (opcode->qualifiers_list[0][1]);
  if (src_size == dst_size && src_size == 0)
    { assert (0); abort (); }
  /* When the result is not a sisd register or it is a long operantion.  */
  if (dst_size == 0 || dst_size == src_size << 1)
    return 1;
  else
    return 0;
}

/* Select the operand to do the encoding/decoding of the 'size:Q' fields in
   the AdvSIMD instructions.  */

int aarch64_select_operand_for_sizeq_field_coding (const aarch64_opcode *);
\f
/* Miscellaneous.  */

aarch64_insn aarch64_get_operand_modifier_value (enum aarch64_modifier_kind);
enum aarch64_modifier_kind
aarch64_get_operand_modifier_from_value (aarch64_insn, bfd_boolean);


bfd_boolean aarch64_wide_constant_p (int64_t, int, unsigned int *);
bfd_boolean aarch64_logical_immediate_p (uint64_t, int, aarch64_insn *);
int aarch64_shrink_expanded_imm8 (uint64_t);

/* Copy the content of INST->OPERANDS[SRC] to INST->OPERANDS[DST].  */
static inline void
copy_operand_info (aarch64_inst *inst, int dst, int src)
{
  assert (dst >= 0 && src >= 0 && dst < AARCH64_MAX_OPND_NUM
	  && src < AARCH64_MAX_OPND_NUM);
  memcpy (&inst->operands[dst], &inst->operands[src],
	  sizeof (aarch64_opnd_info));
  inst->operands[dst].idx = dst;
}

/* A primitive log caculator.  */

static inline unsigned int
get_logsz (unsigned int size)
{
  const unsigned char ls[16] =
    {0, 1, -1, 2, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1, 4};
  if (size > 16)
    {
      assert (0);
      return -1;
    }
  assert (ls[size - 1] != (unsigned char)-1);
  return ls[size - 1];
}

#endif /* OPCODES_AARCH64_OPC_H */
Commit	Line	Data
a06ea964	1	/* aarch64-opc.h -- Header file for aarch64-opc.c and aarch64-opc-2.c.
6f2750fe	2	Copyright (C) 2012-2016 Free Software Foundation, Inc.
a06ea964 NC	3	Contributed by ARM Ltd.
	4
	5	This file is part of the GNU opcodes library.
	6
	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)
	10	any later version.
	11
	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.
	16
	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/>. */
	20
	21	#ifndef OPCODES_AARCH64_OPC_H
	22	#define OPCODES_AARCH64_OPC_H
	23
	24	#include <string.h>
	25	#include "opcode/aarch64.h"
	26
	27	/* Instruction fields.
	28	Keep synced with fields. */
	29	enum aarch64_field_kind
	30	{
	31	FLD_NIL,
	32	FLD_cond2,
	33	FLD_nzcv,
	34	FLD_defgh,
	35	FLD_abc,
	36	FLD_imm19,
	37	FLD_immhi,
	38	FLD_immlo,
	39	FLD_size,
	40	FLD_vldst_size,
	41	FLD_op,
	42	FLD_Q,
	43	FLD_Rt,
	44	FLD_Rd,
	45	FLD_Rn,
	46	FLD_Rt2,
	47	FLD_Ra,
	48	FLD_op2,
	49	FLD_CRm,
	50	FLD_CRn,
	51	FLD_op1,
	52	FLD_op0,
	53	FLD_imm3,
	54	FLD_cond,
	55	FLD_opcode,
	56	FLD_cmode,
	57	FLD_asisdlso_opcode,
	58	FLD_len,
	59	FLD_Rm,
	60	FLD_Rs,
	61	FLD_option,
	62	FLD_S,
	63	FLD_hw,
	64	FLD_opc,
	65	FLD_opc1,
	66	FLD_shift,
67	FLD_type,
68	FLD_ldst_size,
69	FLD_imm6,
70	FLD_imm4,
71	FLD_imm5,
72	FLD_imm7,
73	FLD_imm8,
74	FLD_imm9,
75	FLD_imm12,
76	FLD_imm14,
77	FLD_imm16,
78	FLD_imm26,
79	FLD_imms,
80	FLD_immr,
81	FLD_immb,
82	FLD_immh,
83	FLD_N,
84	FLD_index,
85	FLD_index2,
86	FLD_sf,
ee804238	87	FLD_lse_sz,
a06ea964 NC	88	FLD_H,
	89	FLD_L,
	90	FLD_M,
	91	FLD_b5,
	92	FLD_b40,
	93	FLD_scale,
e950b345	94	FLD_SVE_N,
f11ad6bc RS	95	FLD_SVE_Pd,
	96	FLD_SVE_Pg3,
	97	FLD_SVE_Pg4_5,
	98	FLD_SVE_Pg4_10,
	99	FLD_SVE_Pg4_16,
	100	FLD_SVE_Pm,
	101	FLD_SVE_Pn,
	102	FLD_SVE_Pt,
	103	FLD_SVE_Za_5,
	104	FLD_SVE_Za_16,
	105	FLD_SVE_Zd,
	106	FLD_SVE_Zm_5,
	107	FLD_SVE_Zm_16,
	108	FLD_SVE_Zn,
	109	FLD_SVE_Zt,
165d4950	110	FLD_SVE_i1,
e950b345	111	FLD_SVE_imm3,
2442d846	112	FLD_SVE_imm4,
e950b345 RS	113	FLD_SVE_imm5,
e950b345 RS	114	FLD_SVE_imm5b,
4df068de	115	FLD_SVE_imm6,
e950b345 RS	116	FLD_SVE_imm7,
	117	FLD_SVE_imm8,
	118	FLD_SVE_imm9,
	119	FLD_SVE_immr,
	120	FLD_SVE_imms,
4df068de	121	FLD_SVE_msz,
245d2e3f RS	122	FLD_SVE_pattern,
245d2e3f RS	123	FLD_SVE_prfop,
f11ad6bc	124	FLD_SVE_tszh,
4df068de RS	125	FLD_SVE_xs_14,
4df068de RS	126	FLD_SVE_xs_22,
a06ea964 NC	127	};
	128
	129	/* Field description. */
	130	struct aarch64_field
	131	{
	132	int lsb;
	133	int width;
	134	};
	135
	136	typedef struct aarch64_field aarch64_field;
	137
	138	extern const aarch64_field fields[];
	139	\f
	140	/* Operand description. */
	141
	142	struct aarch64_operand
	143	{
	144	enum aarch64_operand_class op_class;
	145
	146	/* Name of the operand code; used mainly for the purpose of internal
	147	debugging. */
	148	const char *name;
	149
	150	unsigned int flags;
	151
	152	/* The associated instruction bit-fields; no operand has more than 4
	153	bit-fields */
	154	enum aarch64_field_kind fields[4];
	155
	156	/* Brief description */
	157	const char *desc;
	158	};
	159
	160	typedef struct aarch64_operand aarch64_operand;
	161
	162	extern const aarch64_operand aarch64_operands[];
	163
	164	/* Operand flags. */
	165
	166	#define OPD_F_HAS_INSERTER 0x00000001
	167	#define OPD_F_HAS_EXTRACTOR 0x00000002
	168	#define OPD_F_SEXT 0x00000004 /* Require sign-extension. */
	169	#define OPD_F_SHIFT_BY_2 0x00000008 /* Need to left shift the field
	170	value by 2 to get the value
	171	of an immediate operand. */
	172	#define OPD_F_MAYBE_SP 0x00000010 /* May potentially be SP. */
4df068de RS	173	#define OPD_F_OD_MASK 0x00000060 /* Operand-dependent data. */
	174	#define OPD_F_OD_LSB 5
	175	#define OPD_F_NO_ZR 0x00000080 /* ZR index not allowed. */
a06ea964 NC	176
	177	static inline bfd_boolean
	178	operand_has_inserter (const aarch64_operand *operand)
	179	{
	180	return (operand->flags & OPD_F_HAS_INSERTER) ? TRUE : FALSE;
	181	}
	182
	183	static inline bfd_boolean
	184	operand_has_extractor (const aarch64_operand *operand)
	185	{
	186	return (operand->flags & OPD_F_HAS_EXTRACTOR) ? TRUE : FALSE;
	187	}
	188
	189	static inline bfd_boolean
	190	operand_need_sign_extension (const aarch64_operand *operand)
	191	{
	192	return (operand->flags & OPD_F_SEXT) ? TRUE : FALSE;
	193	}
	194
	195	static inline bfd_boolean
	196	operand_need_shift_by_two (const aarch64_operand *operand)
	197	{
	198	return (operand->flags & OPD_F_SHIFT_BY_2) ? TRUE : FALSE;
	199	}
	200
	201	static inline bfd_boolean
	202	operand_maybe_stack_pointer (const aarch64_operand *operand)
	203	{
	204	return (operand->flags & OPD_F_MAYBE_SP) ? TRUE : FALSE;
	205	}
	206
4df068de RS	207	/* Return the value of the operand-specific data field (OPD_F_OD_MASK). */
	208	static inline unsigned int
	209	get_operand_specific_data (const aarch64_operand *operand)
	210	{
	211	return (operand->flags & OPD_F_OD_MASK) >> OPD_F_OD_LSB;
	212	}
	213
a06ea964 NC	214	/* Return the total width of the operand OPERAND. /
	215	static inline unsigned
	216	get_operand_fields_width (const aarch64_operand *operand)
	217	{
	218	int i = 0;
	219	unsigned width = 0;
	220	while (operand->fields[i] != FLD_NIL)
	221	width += fields[operand->fields[i++]].width;
	222	assert (width > 0 && width < 32);
	223	return width;
	224	}
	225
	226	static inline const aarch64_operand *
	227	get_operand_from_code (enum aarch64_opnd code)
	228	{
	229	return aarch64_operands + code;
	230	}
	231	\f
	232	/* Operand qualifier and operand constraint checking. */
	233
	234	int aarch64_match_operands_constraint (aarch64_inst *,
	235	aarch64_operand_error *);
	236
	237	/* Operand qualifier related functions. */
	238	const char* aarch64_get_qualifier_name (aarch64_opnd_qualifier_t);
	239	unsigned char aarch64_get_qualifier_nelem (aarch64_opnd_qualifier_t);
	240	aarch64_insn aarch64_get_qualifier_standard_value (aarch64_opnd_qualifier_t);
	241	int aarch64_find_best_match (const aarch64_inst *,
	242	const aarch64_opnd_qualifier_seq_t *,
	243	int, aarch64_opnd_qualifier_t *);
	244
	245	static inline void
	246	reset_operand_qualifier (aarch64_inst *inst, int idx)
	247	{
	248	assert (idx >=0 && idx < aarch64_num_of_operands (inst->opcode));
	249	inst->operands[idx].qualifier = AARCH64_OPND_QLF_NIL;
	250	}
	251	\f
	252	/* Inline functions operating on instruction bit-field(s). */
	253
	254	/* Generate a mask that has WIDTH number of consecutive 1s. */
	255
	256	static inline aarch64_insn
	257	gen_mask (int width)
	258	{
5bb3703f	259	return ((aarch64_insn) 1 << width) - 1;
a06ea964 NC	260	}
	261
	262	/* LSB_REL is the relative location of the lsb in the sub field, starting from 0. */
	263	static inline int
	264	gen_sub_field (enum aarch64_field_kind kind, int lsb_rel, int width, aarch64_field *ret)
	265	{
	266	const aarch64_field *field = &fields[kind];
	267	if (lsb_rel < 0 \|\| width <= 0 \|\| lsb_rel + width > field->width)
	268	return 0;
	269	ret->lsb = field->lsb + lsb_rel;
	270	ret->width = width;
	271	return 1;
	272	}
	273
	274	/* Insert VALUE into FIELD of CODE. MASK can be zero or the base mask
	275	of the opcode. */
	276
	277	static inline void
	278	insert_field_2 (const aarch64_field field, aarch64_insn code,
	279	aarch64_insn value, aarch64_insn mask)
	280	{
	281	assert (field->width < 32 && field->width >= 1 && field->lsb >= 0
	282	&& field->lsb + field->width <= 32);
	283	value &= gen_mask (field->width);
	284	value <<= field->lsb;
	285	/* In some opcodes, field can be part of the base opcode, e.g. the size
	286	field in FADD. The following helps avoid corrupt the base opcode. */
	287	value &= ~mask;
	288	*code \|= value;
	289	}
	290
	291	/* Extract FIELD of CODE and return the value. MASK can be zero or the base
	292	mask of the opcode. */
	293
	294	static inline aarch64_insn
	295	extract_field_2 (const aarch64_field *field, aarch64_insn code,
	296	aarch64_insn mask)
	297	{
	298	aarch64_insn value;
	299	/* Clear any bit that is a part of the base opcode. */
	300	code &= ~mask;
	301	value = (code >> field->lsb) & gen_mask (field->width);
	302	return value;
	303	}
	304
	305	/* Insert VALUE into field KIND of CODE. MASK can be zero or the base mask
	306	of the opcode. */
	307
	308	static inline void
	309	insert_field (enum aarch64_field_kind kind, aarch64_insn *code,
	310	aarch64_insn value, aarch64_insn mask)
	311	{
	312	insert_field_2 (&fields[kind], code, value, mask);
	313	}
	314
	315	/* Extract field KIND of CODE and return the value. MASK can be zero or the
	316	base mask of the opcode. */
	317
	318	static inline aarch64_insn
	319	extract_field (enum aarch64_field_kind kind, aarch64_insn code,
	320	aarch64_insn mask)
	321	{
	322	return extract_field_2 (&fields[kind], code, mask);
	323	}
324	\f
325	/* Inline functions selecting operand to do the encoding/decoding for a
326	certain instruction bit-field. */
327
328	/* Select the operand to do the encoding/decoding of the 'sf' field.
329	The heuristic-based rule is that the result operand is respected more. */
330
331	static inline int
332	select_operand_for_sf_field_coding (const aarch64_opcode *opcode)
333	{
334	int idx = -1;
335	if (aarch64_get_operand_class (opcode->operands[0])
336	== AARCH64_OPND_CLASS_INT_REG)
337	/* normal case. */
338	idx = 0;
339	else if (aarch64_get_operand_class (opcode->operands[1])
340	== AARCH64_OPND_CLASS_INT_REG)
341	/* e.g. float2fix. */
342	idx = 1;
343	else
344	{ assert (0); abort (); }
345	return idx;
346	}
347
348	/* Select the operand to do the encoding/decoding of the 'type' field in
349	the floating-point instructions.
350	The heuristic-based rule is that the source operand is respected more. */
351
352	static inline int
353	select_operand_for_fptype_field_coding (const aarch64_opcode *opcode)
354	{
355	int idx;
356	if (aarch64_get_operand_class (opcode->operands[1])
357	== AARCH64_OPND_CLASS_FP_REG)
358	/* normal case. */
359	idx = 1;
360	else if (aarch64_get_operand_class (opcode->operands[0])
361	== AARCH64_OPND_CLASS_FP_REG)
362	/* e.g. float2fix. */
363	idx = 0;
364	else
365	{ assert (0); abort (); }
366	return idx;
367	}
368
369	/* Select the operand to do the encoding/decoding of the 'size' field in
370	the AdvSIMD scalar instructions.
371	The heuristic-based rule is that the destination operand is respected
372	more. */
373
374	static inline int
375	select_operand_for_scalar_size_field_coding (const aarch64_opcode *opcode)
376	{
377	int src_size = 0, dst_size = 0;
378	if (aarch64_get_operand_class (opcode->operands[0])
379	== AARCH64_OPND_CLASS_SISD_REG)
380	dst_size = aarch64_get_qualifier_esize (opcode->qualifiers_list[0][0]);
381	if (aarch64_get_operand_class (opcode->operands[1])
382	== AARCH64_OPND_CLASS_SISD_REG)
383	src_size = aarch64_get_qualifier_esize (opcode->qualifiers_list[0][1]);
384	if (src_size == dst_size && src_size == 0)
385	{ assert (0); abort (); }
386	/* When the result is not a sisd register or it is a long operantion. */
387	if (dst_size == 0 \|\| dst_size == src_size << 1)
388	return 1;
389	else
390	return 0;
391	}
392
393	/* Select the operand to do the encoding/decoding of the 'size:Q' fields in
394	the AdvSIMD instructions. */
395
396	int aarch64_select_operand_for_sizeq_field_coding (const aarch64_opcode *);
397	\f
398	/* Miscellaneous. */
399
400	aarch64_insn aarch64_get_operand_modifier_value (enum aarch64_modifier_kind);
401	enum aarch64_modifier_kind
402	aarch64_get_operand_modifier_from_value (aarch64_insn, bfd_boolean);
403
404
405	bfd_boolean aarch64_wide_constant_p (int64_t, int, unsigned int *);
406	bfd_boolean aarch64_logical_immediate_p (uint64_t, int, aarch64_insn *);
407	int aarch64_shrink_expanded_imm8 (uint64_t);
408
409	/* Copy the content of INST->OPERANDS[SRC] to INST->OPERANDS[DST]. */
410	static inline void
411	copy_operand_info (aarch64_inst *inst, int dst, int src)
412	{
413	assert (dst >= 0 && src >= 0 && dst < AARCH64_MAX_OPND_NUM
414	&& src < AARCH64_MAX_OPND_NUM);
415	memcpy (&inst->operands[dst], &inst->operands[src],
416	sizeof (aarch64_opnd_info));
417	inst->operands[dst].idx = dst;
418	}
419
420	/* A primitive log caculator. */
421
422	static inline unsigned int
423	get_logsz (unsigned int size)
424	{
425	const unsigned char ls[16] =
426	{0, 1, -1, 2, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1, 4};
427	if (size > 16)
428	{
429	assert (0);
430	return -1;
431	}
432	assert (ls[size - 1] != (unsigned char)-1);
433	return ls[size - 1];
434	}
435
436	#endif /* OPCODES_AARCH64_OPC_H */