393 lines
10 KiB
C
393 lines
10 KiB
C
/* aarch64-opc.h -- Header file for aarch64-opc.c and aarch64-opc-2.c.
|
||
Copyright 2012 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_H,
|
||
FLD_L,
|
||
FLD_M,
|
||
FLD_b5,
|
||
FLD_b40,
|
||
FLD_scale,
|
||
};
|
||
|
||
/* Field description. */
|
||
struct aarch64_field
|
||
{
|
||
int lsb;
|
||
int width;
|
||
};
|
||
|
||
typedef struct aarch64_field aarch64_field;
|
||
|
||
extern const aarch64_field fields[];
|
||
|
||
/* 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. */
|
||
|
||
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 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;
|
||
}
|
||
|
||
/* 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;
|
||
}
|
||
|
||
/* 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);
|
||
}
|
||
|
||
/* 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 *);
|
||
|
||
/* 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 */
|