/
xtensa-isa.c
1800 lines (1419 loc) · 44.3 KB
/
xtensa-isa.c
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/* Configurable Xtensa ISA support.
Copyright (C) 2003-2015 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
This program 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 of the License, or
(at your option) any later version.
This program 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; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "../../include/disas-asm.h"
#include "../../include/sysdep.h"
//#include "bfd.h"
//#include "libbfd.h"
#include "../../include/xtensa-isa.h"
#include "../../include/xtensa-isa-internal.h"
#include "r_types.h"
#include "r_util.h"
extern int filename_cmp (const char *s1, const char *s2);
xtensa_isa_status xtisa_errno;
char xtisa_error_msg[1024];
xtensa_isa_status
xtensa_isa_errno (xtensa_isa isa __attribute__ ((unused)))
{
return xtisa_errno;
}
char *
xtensa_isa_error_msg (xtensa_isa isa __attribute__ ((unused)))
{
return xtisa_error_msg;
}
#define CHECK_ALLOC(MEM,ERRVAL) \
do { \
if ((MEM) == 0) \
{ \
xtisa_errno = xtensa_isa_out_of_memory; \
strcpy (xtisa_error_msg, "out of memory"); \
return (ERRVAL); \
} \
} while (0)
#define CHECK_ALLOC_FOR_INIT(MEM,ERRVAL,ERRNO_P,ERROR_MSG_P) \
do { \
if ((MEM) == 0) \
{ \
xtisa_errno = xtensa_isa_out_of_memory; \
strcpy (xtisa_error_msg, "out of memory"); \
if (ERRNO_P) *(ERRNO_P) = xtisa_errno; \
if (ERROR_MSG_P) *(ERROR_MSG_P) = xtisa_error_msg; \
return (ERRVAL); \
} \
} while (0)
/* Instruction buffers. */
int
xtensa_insnbuf_size (xtensa_isa isa)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
return intisa->insnbuf_size;
}
xtensa_insnbuf
xtensa_insnbuf_alloc (xtensa_isa isa)
{
xtensa_insnbuf result = (xtensa_insnbuf)
malloc (xtensa_insnbuf_size (isa) * sizeof (xtensa_insnbuf_word));
CHECK_ALLOC (result, 0);
return result;
}
void
xtensa_insnbuf_free (xtensa_isa isa __attribute__ ((unused)),
xtensa_insnbuf buf)
{
free (buf);
}
/* Given <byte_index>, the index of a byte in a xtensa_insnbuf, our
internal representation of a xtensa instruction word, return the index of
its word and the bit index of its low order byte in the xtensa_insnbuf. */
static inline int
byte_to_word_index (int byte_index)
{
return byte_index / sizeof (xtensa_insnbuf_word);
}
static inline int
byte_to_bit_index (int byte_index)
{
return (byte_index & 0x3) * 8;
}
/* Copy an instruction in the 32-bit words pointed at by "insn" to
characters pointed at by "cp". This is more complicated than you
might think because we want 16-bit instructions in bytes 2 & 3 for
big-endian configurations. This function allows us to specify
which byte in "insn" to start with and which way to increment,
allowing trivial implementation for both big- and little-endian
configurations....and it seems to make pretty good code for
both. */
int
xtensa_insnbuf_to_chars (xtensa_isa isa,
const xtensa_insnbuf insn,
unsigned char *cp,
int num_chars)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int insn_size = xtensa_isa_maxlength (isa);
int fence_post, start, increment, i, byte_count;
xtensa_format fmt;
if (num_chars == 0)
num_chars = insn_size;
if (intisa->is_big_endian)
{
start = insn_size - 1;
increment = -1;
}
else
{
start = 0;
increment = 1;
}
/* Find the instruction format. Do nothing if the buffer does not contain
a valid instruction since we need to know how many bytes to copy. */
fmt = xtensa_format_decode (isa, insn);
if (fmt == XTENSA_UNDEFINED)
return XTENSA_UNDEFINED;
byte_count = xtensa_format_length (isa, fmt);
if (byte_count == XTENSA_UNDEFINED)
return XTENSA_UNDEFINED;
if (byte_count > num_chars)
{
xtisa_errno = xtensa_isa_buffer_overflow;
strcpy (xtisa_error_msg, "output buffer too small for instruction");
return XTENSA_UNDEFINED;
}
fence_post = start + (byte_count * increment);
for (i = start; i != fence_post; i += increment, ++cp)
{
int word_inx = byte_to_word_index (i);
int bit_inx = byte_to_bit_index (i);
*cp = (insn[word_inx] >> bit_inx) & 0xff;
}
return byte_count;
}
/* Inward conversion from byte stream to xtensa_insnbuf. See
xtensa_insnbuf_to_chars for a discussion of why this is complicated
by endianness. */
void
xtensa_insnbuf_from_chars (xtensa_isa isa,
xtensa_insnbuf insn,
const unsigned char *cp,
int num_chars)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int max_size, insn_size, fence_post, start, increment, i;
max_size = xtensa_isa_maxlength (isa);
/* Decode the instruction length so we know how many bytes to read. */
insn_size = (intisa->length_decode_fn) (cp);
if (insn_size == XTENSA_UNDEFINED)
{
/* This should never happen when the byte stream contains a
valid instruction. Just read the maximum number of bytes.... */
insn_size = max_size;
}
if (num_chars == 0 || num_chars > insn_size)
num_chars = insn_size;
if (intisa->is_big_endian)
{
start = max_size - 1;
increment = -1;
}
else
{
start = 0;
increment = 1;
}
fence_post = start + (num_chars * increment);
memset (insn, 0, xtensa_insnbuf_size (isa) * sizeof (xtensa_insnbuf_word));
for (i = start; i != fence_post; i += increment, ++cp)
{
int word_inx = byte_to_word_index (i);
int bit_inx = byte_to_bit_index (i);
insn[word_inx] |= (*cp & 0xff) << bit_inx;
}
}
/* ISA information. */
extern xtensa_isa_internal xtensa_modules;
xtensa_isa
xtensa_isa_init (xtensa_isa_status *errno_p, char **error_msg_p)
{
xtensa_isa_internal *isa = &xtensa_modules;
int n, is_user;
/* Set up the opcode name lookup table. */
isa->opname_lookup_table =
bfd_malloc (isa->num_opcodes * sizeof (xtensa_lookup_entry));
CHECK_ALLOC_FOR_INIT (isa->opname_lookup_table, NULL, errno_p, error_msg_p);
for (n = 0; n < isa->num_opcodes; n++)
{
isa->opname_lookup_table[n].key = isa->opcodes[n].name;
isa->opname_lookup_table[n].u.opcode = n;
}
qsort (isa->opname_lookup_table, isa->num_opcodes,
sizeof (xtensa_lookup_entry), xtensa_isa_name_compare);
/* Set up the state name lookup table. */
isa->state_lookup_table =
bfd_malloc (isa->num_states * sizeof (xtensa_lookup_entry));
CHECK_ALLOC_FOR_INIT (isa->state_lookup_table, NULL, errno_p, error_msg_p);
for (n = 0; n < isa->num_states; n++)
{
isa->state_lookup_table[n].key = isa->states[n].name;
isa->state_lookup_table[n].u.state = n;
}
qsort (isa->state_lookup_table, isa->num_states,
sizeof (xtensa_lookup_entry), xtensa_isa_name_compare);
/* Set up the sysreg name lookup table. */
isa->sysreg_lookup_table =
bfd_malloc (isa->num_sysregs * sizeof (xtensa_lookup_entry));
CHECK_ALLOC_FOR_INIT (isa->sysreg_lookup_table, NULL, errno_p, error_msg_p);
for (n = 0; n < isa->num_sysregs; n++)
{
isa->sysreg_lookup_table[n].key = isa->sysregs[n].name;
isa->sysreg_lookup_table[n].u.sysreg = n;
}
qsort (isa->sysreg_lookup_table, isa->num_sysregs,
sizeof (xtensa_lookup_entry), xtensa_isa_name_compare);
/* Set up the user & system sysreg number tables. */
for (is_user = 0; is_user < 2; is_user++)
{
isa->sysreg_table[is_user] =
bfd_malloc ((isa->max_sysreg_num[is_user] + 1)
* sizeof (xtensa_sysreg));
CHECK_ALLOC_FOR_INIT (isa->sysreg_table[is_user], NULL,
errno_p, error_msg_p);
for (n = 0; n <= isa->max_sysreg_num[is_user]; n++)
isa->sysreg_table[is_user][n] = XTENSA_UNDEFINED;
}
for (n = 0; n < isa->num_sysregs; n++)
{
xtensa_sysreg_internal *sreg = &isa->sysregs[n];
is_user = sreg->is_user;
isa->sysreg_table[is_user][sreg->number] = n;
}
/* Set up the interface lookup table. */
isa->interface_lookup_table =
calloc (isa->num_interfaces, sizeof (xtensa_lookup_entry));
CHECK_ALLOC_FOR_INIT (isa->interface_lookup_table, NULL, errno_p,
error_msg_p);
for (n = 0; n < isa->num_interfaces; n++)
{
isa->interface_lookup_table[n].key = isa->interfaces[n].name;
isa->interface_lookup_table[n].u.intf = n;
}
qsort (isa->interface_lookup_table, isa->num_interfaces,
sizeof (xtensa_lookup_entry), xtensa_isa_name_compare);
/* Set up the funcUnit lookup table. */
isa->funcUnit_lookup_table =
bfd_malloc (isa->num_funcUnits * sizeof (xtensa_lookup_entry));
CHECK_ALLOC_FOR_INIT (isa->funcUnit_lookup_table, NULL, errno_p,
error_msg_p);
for (n = 0; n < isa->num_funcUnits; n++)
{
isa->funcUnit_lookup_table[n].key = isa->funcUnits[n].name;
isa->funcUnit_lookup_table[n].u.fun = n;
}
qsort (isa->funcUnit_lookup_table, isa->num_funcUnits,
sizeof (xtensa_lookup_entry), xtensa_isa_name_compare);
isa->insnbuf_size = ((isa->insn_size + sizeof (xtensa_insnbuf_word) - 1) /
sizeof (xtensa_insnbuf_word));
return (xtensa_isa) isa;
}
void
xtensa_isa_free (xtensa_isa isa)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int n;
/* With this version of the code, the xtensa_isa structure is not
dynamically allocated, so this function is not essential. Free
the memory allocated by xtensa_isa_init and restore the xtensa_isa
structure to its initial state. */
if (intisa->opname_lookup_table)
{
free (intisa->opname_lookup_table);
intisa->opname_lookup_table = 0;
}
if (intisa->state_lookup_table)
{
free (intisa->state_lookup_table);
intisa->state_lookup_table = 0;
}
if (intisa->sysreg_lookup_table)
{
free (intisa->sysreg_lookup_table);
intisa->sysreg_lookup_table = 0;
}
for (n = 0; n < 2; n++)
{
if (intisa->sysreg_table[n])
{
free (intisa->sysreg_table[n]);
intisa->sysreg_table[n] = 0;
}
}
if (intisa->interface_lookup_table)
{
free (intisa->interface_lookup_table);
intisa->interface_lookup_table = 0;
}
if (intisa->funcUnit_lookup_table)
{
free (intisa->funcUnit_lookup_table);
intisa->funcUnit_lookup_table = 0;
}
}
int
xtensa_isa_name_compare (const void *v1, const void *v2)
{
xtensa_lookup_entry *e1 = (xtensa_lookup_entry *) v1;
xtensa_lookup_entry *e2 = (xtensa_lookup_entry *) v2;
return r_str_casecmp (e1->key, e2->key);
}
int
xtensa_isa_maxlength (xtensa_isa isa)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
return intisa->insn_size;
}
int
xtensa_isa_length_from_chars (xtensa_isa isa, const unsigned char *cp)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
return (intisa->length_decode_fn) (cp);
}
int
xtensa_isa_num_pipe_stages (xtensa_isa isa)
{
xtensa_opcode opcode;
xtensa_funcUnit_use *use;
int num_opcodes, num_uses;
int i, stage;
static int max_stage = XTENSA_UNDEFINED;
/* Only compute the value once. */
if (max_stage != XTENSA_UNDEFINED)
return max_stage + 1;
num_opcodes = xtensa_isa_num_opcodes (isa);
for (opcode = 0; opcode < num_opcodes; opcode++)
{
num_uses = xtensa_opcode_num_funcUnit_uses (isa, opcode);
for (i = 0; i < num_uses; i++)
{
use = xtensa_opcode_funcUnit_use (isa, opcode, i);
stage = use->stage;
if (stage > max_stage)
max_stage = stage;
}
}
return max_stage + 1;
}
int
xtensa_isa_num_formats (xtensa_isa isa)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
return intisa->num_formats;
}
int
xtensa_isa_num_opcodes (xtensa_isa isa)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
return intisa->num_opcodes;
}
int
xtensa_isa_num_regfiles (xtensa_isa isa)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
return intisa->num_regfiles;
}
int
xtensa_isa_num_states (xtensa_isa isa)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
return intisa->num_states;
}
int
xtensa_isa_num_sysregs (xtensa_isa isa)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
return intisa->num_sysregs;
}
int
xtensa_isa_num_interfaces (xtensa_isa isa)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
return intisa->num_interfaces;
}
int
xtensa_isa_num_funcUnits (xtensa_isa isa)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
return intisa->num_funcUnits;
}
/* Instruction formats. */
#define CHECK_FORMAT(INTISA,FMT,ERRVAL) \
do { \
if ((FMT) < 0 || (FMT) >= (INTISA)->num_formats) \
{ \
xtisa_errno = xtensa_isa_bad_format; \
strcpy (xtisa_error_msg, "invalid format specifier"); \
return (ERRVAL); \
} \
} while (0)
#define CHECK_SLOT(INTISA,FMT,SLOT,ERRVAL) \
do { \
if ((SLOT) < 0 || (SLOT) >= (INTISA)->formats[FMT].num_slots) \
{ \
xtisa_errno = xtensa_isa_bad_slot; \
strcpy (xtisa_error_msg, "invalid slot specifier"); \
return (ERRVAL); \
} \
} while (0)
const char *
xtensa_format_name (xtensa_isa isa, xtensa_format fmt)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
CHECK_FORMAT (intisa, fmt, NULL);
return intisa->formats[fmt].name;
}
xtensa_format
xtensa_format_lookup (xtensa_isa isa, const char *fmtname)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int fmt;
if (!fmtname || !*fmtname)
{
xtisa_errno = xtensa_isa_bad_format;
strcpy (xtisa_error_msg, "invalid format name");
return XTENSA_UNDEFINED;
}
for (fmt = 0; fmt < intisa->num_formats; fmt++)
{
if (r_str_casecmp (fmtname, intisa->formats[fmt].name) == 0)
return fmt;
}
xtisa_errno = xtensa_isa_bad_format;
sprintf (xtisa_error_msg, "format \"%s\" not recognized", fmtname);
return XTENSA_UNDEFINED;
}
xtensa_format
xtensa_format_decode (xtensa_isa isa, const xtensa_insnbuf insn)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
xtensa_format fmt;
fmt = (intisa->format_decode_fn) (insn);
if (fmt != XTENSA_UNDEFINED)
return fmt;
xtisa_errno = xtensa_isa_bad_format;
strcpy (xtisa_error_msg, "cannot decode instruction format");
return XTENSA_UNDEFINED;
}
int
xtensa_format_encode (xtensa_isa isa, xtensa_format fmt, xtensa_insnbuf insn)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
CHECK_FORMAT (intisa, fmt, -1);
(*intisa->formats[fmt].encode_fn) (insn);
return 0;
}
int
xtensa_format_length (xtensa_isa isa, xtensa_format fmt)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED);
return intisa->formats[fmt].length;
}
int
xtensa_format_num_slots (xtensa_isa isa, xtensa_format fmt)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED);
return intisa->formats[fmt].num_slots;
}
xtensa_opcode
xtensa_format_slot_nop_opcode (xtensa_isa isa, xtensa_format fmt, int slot)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int slot_id;
CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED);
CHECK_SLOT (intisa, fmt, slot, XTENSA_UNDEFINED);
slot_id = intisa->formats[fmt].slot_id[slot];
return xtensa_opcode_lookup (isa, intisa->slots[slot_id].nop_name);
}
int
xtensa_format_get_slot (xtensa_isa isa, xtensa_format fmt, int slot,
const xtensa_insnbuf insn, xtensa_insnbuf slotbuf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int slot_id;
CHECK_FORMAT (intisa, fmt, -1);
CHECK_SLOT (intisa, fmt, slot, -1);
slot_id = intisa->formats[fmt].slot_id[slot];
(*intisa->slots[slot_id].get_fn) (insn, slotbuf);
return 0;
}
int
xtensa_format_set_slot (xtensa_isa isa, xtensa_format fmt, int slot,
xtensa_insnbuf insn, const xtensa_insnbuf slotbuf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int slot_id;
CHECK_FORMAT (intisa, fmt, -1);
CHECK_SLOT (intisa, fmt, slot, -1);
slot_id = intisa->formats[fmt].slot_id[slot];
(*intisa->slots[slot_id].set_fn) (insn, slotbuf);
return 0;
}
/* Opcode information. */
#define CHECK_OPCODE(INTISA,OPC,ERRVAL) \
do { \
if ((OPC) < 0 || (OPC) >= (INTISA)->num_opcodes) \
{ \
xtisa_errno = xtensa_isa_bad_opcode; \
strcpy (xtisa_error_msg, "invalid opcode specifier"); \
return (ERRVAL); \
} \
} while (0)
xtensa_opcode
xtensa_opcode_lookup (xtensa_isa isa, const char *opname)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
xtensa_lookup_entry entry, *result = 0;
if (!opname || !*opname)
{
xtisa_errno = xtensa_isa_bad_opcode;
strcpy (xtisa_error_msg, "invalid opcode name");
return XTENSA_UNDEFINED;
}
if (intisa->num_opcodes != 0)
{
entry.key = opname;
result = bsearch (&entry, intisa->opname_lookup_table,
intisa->num_opcodes, sizeof (xtensa_lookup_entry),
xtensa_isa_name_compare);
}
if (!result)
{
xtisa_errno = xtensa_isa_bad_opcode;
sprintf (xtisa_error_msg, "opcode \"%s\" not recognized", opname);
return XTENSA_UNDEFINED;
}
return result->u.opcode;
}
xtensa_opcode
xtensa_opcode_decode (xtensa_isa isa, xtensa_format fmt, int slot,
const xtensa_insnbuf slotbuf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int slot_id;
xtensa_opcode opc;
CHECK_FORMAT (intisa, fmt, XTENSA_UNDEFINED);
CHECK_SLOT (intisa, fmt, slot, XTENSA_UNDEFINED);
slot_id = intisa->formats[fmt].slot_id[slot];
opc = (intisa->slots[slot_id].opcode_decode_fn) (slotbuf);
if (opc != XTENSA_UNDEFINED)
return opc;
xtisa_errno = xtensa_isa_bad_opcode;
strcpy (xtisa_error_msg, "cannot decode opcode");
return XTENSA_UNDEFINED;
}
int
xtensa_opcode_encode (xtensa_isa isa, xtensa_format fmt, int slot,
xtensa_insnbuf slotbuf, xtensa_opcode opc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int slot_id;
xtensa_opcode_encode_fn encode_fn;
CHECK_FORMAT (intisa, fmt, -1);
CHECK_SLOT (intisa, fmt, slot, -1);
CHECK_OPCODE (intisa, opc, -1);
slot_id = intisa->formats[fmt].slot_id[slot];
encode_fn = intisa->opcodes[opc].encode_fns[slot_id];
if (!encode_fn)
{
xtisa_errno = xtensa_isa_wrong_slot;
sprintf (xtisa_error_msg,
"opcode \"%s\" is not allowed in slot %d of format \"%s\"",
intisa->opcodes[opc].name, slot, intisa->formats[fmt].name);
return -1;
}
(*encode_fn) (slotbuf);
return 0;
}
const char *
xtensa_opcode_name (xtensa_isa isa, xtensa_opcode opc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
CHECK_OPCODE (intisa, opc, NULL);
return intisa->opcodes[opc].name;
}
int
xtensa_opcode_is_branch (xtensa_isa isa, xtensa_opcode opc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_BRANCH) != 0)
return 1;
return 0;
}
int
xtensa_opcode_is_jump (xtensa_isa isa, xtensa_opcode opc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_JUMP) != 0)
return 1;
return 0;
}
int
xtensa_opcode_is_loop (xtensa_isa isa, xtensa_opcode opc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_LOOP) != 0)
return 1;
return 0;
}
int
xtensa_opcode_is_call (xtensa_isa isa, xtensa_opcode opc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
if ((intisa->opcodes[opc].flags & XTENSA_OPCODE_IS_CALL) != 0)
return 1;
return 0;
}
int
xtensa_opcode_num_operands (xtensa_isa isa, xtensa_opcode opc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int iclass_id;
CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
iclass_id = intisa->opcodes[opc].iclass_id;
return intisa->iclasses[iclass_id].num_operands;
}
int
xtensa_opcode_num_stateOperands (xtensa_isa isa, xtensa_opcode opc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int iclass_id;
CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
iclass_id = intisa->opcodes[opc].iclass_id;
return intisa->iclasses[iclass_id].num_stateOperands;
}
int
xtensa_opcode_num_interfaceOperands (xtensa_isa isa, xtensa_opcode opc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
int iclass_id;
CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
iclass_id = intisa->opcodes[opc].iclass_id;
return intisa->iclasses[iclass_id].num_interfaceOperands;
}
int
xtensa_opcode_num_funcUnit_uses (xtensa_isa isa, xtensa_opcode opc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
return intisa->opcodes[opc].num_funcUnit_uses;
}
xtensa_funcUnit_use *
xtensa_opcode_funcUnit_use (xtensa_isa isa, xtensa_opcode opc, int u)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
CHECK_OPCODE (intisa, opc, NULL);
if (u < 0 || u >= intisa->opcodes[opc].num_funcUnit_uses)
{
xtisa_errno = xtensa_isa_bad_funcUnit;
sprintf (xtisa_error_msg, "invalid functional unit use number (%d); "
"opcode \"%s\" has %d", u, intisa->opcodes[opc].name,
intisa->opcodes[opc].num_funcUnit_uses);
return NULL;
}
return &intisa->opcodes[opc].funcUnit_uses[u];
}
/* Operand information. */
#define CHECK_OPERAND(INTISA,OPC,ICLASS,OPND,ERRVAL) \
do { \
if ((OPND) < 0 || (OPND) >= (ICLASS)->num_operands) \
{ \
xtisa_errno = xtensa_isa_bad_operand; \
sprintf (xtisa_error_msg, "invalid operand number (%d); " \
"opcode \"%s\" has %d operands", (OPND), \
(INTISA)->opcodes[(OPC)].name, (ICLASS)->num_operands); \
return (ERRVAL); \
} \
} while (0)
static xtensa_operand_internal *
get_operand (xtensa_isa_internal *intisa, xtensa_opcode opc, int opnd)
{
xtensa_iclass_internal *iclass;
int iclass_id, operand_id;
CHECK_OPCODE (intisa, opc, NULL);
iclass_id = intisa->opcodes[opc].iclass_id;
iclass = &intisa->iclasses[iclass_id];
CHECK_OPERAND (intisa, opc, iclass, opnd, NULL);
operand_id = iclass->operands[opnd].u.operand_id;
return &intisa->operands[operand_id];
}
const char *
xtensa_operand_name (xtensa_isa isa, xtensa_opcode opc, int opnd)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
xtensa_operand_internal *intop;
intop = get_operand (intisa, opc, opnd);
if (!intop) return NULL;
return intop->name;
}
int
xtensa_operand_is_visible (xtensa_isa isa, xtensa_opcode opc, int opnd)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
xtensa_iclass_internal *iclass;
int iclass_id, operand_id;
xtensa_operand_internal *intop;
CHECK_OPCODE (intisa, opc, XTENSA_UNDEFINED);
iclass_id = intisa->opcodes[opc].iclass_id;
iclass = &intisa->iclasses[iclass_id];
CHECK_OPERAND (intisa, opc, iclass, opnd, XTENSA_UNDEFINED);
/* Special case for "sout" operands. */
if (iclass->operands[opnd].inout == 's')
return 0;
operand_id = iclass->operands[opnd].u.operand_id;
intop = &intisa->operands[operand_id];
if ((intop->flags & XTENSA_OPERAND_IS_INVISIBLE) == 0)
return 1;
return 0;
}
char
xtensa_operand_inout (xtensa_isa isa, xtensa_opcode opc, int opnd)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
xtensa_iclass_internal *iclass;
int iclass_id;
char inout;
CHECK_OPCODE (intisa, opc, 0);
iclass_id = intisa->opcodes[opc].iclass_id;
iclass = &intisa->iclasses[iclass_id];
CHECK_OPERAND (intisa, opc, iclass, opnd, 0);
inout = iclass->operands[opnd].inout;
/* Special case for "sout" operands. */
if (inout == 's')
return 'o';
return inout;
}
int
xtensa_operand_get_field (xtensa_isa isa, xtensa_opcode opc, int opnd,
xtensa_format fmt, int slot,
const xtensa_insnbuf slotbuf, uint32 *valp)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
xtensa_operand_internal *intop;
int slot_id;
xtensa_get_field_fn get_fn;
intop = get_operand (intisa, opc, opnd);
if (!intop) return -1;
CHECK_FORMAT (intisa, fmt, -1);
CHECK_SLOT (intisa, fmt, slot, -1);
slot_id = intisa->formats[fmt].slot_id[slot];
if (intop->field_id == XTENSA_UNDEFINED)
{
xtisa_errno = xtensa_isa_no_field;
strcpy (xtisa_error_msg, "implicit operand has no field");
return -1;
}
get_fn = intisa->slots[slot_id].get_field_fns[intop->field_id];
if (!get_fn)
{
xtisa_errno = xtensa_isa_wrong_slot;
sprintf (xtisa_error_msg,
"operand \"%s\" does not exist in slot %d of format \"%s\"",
intop->name, slot, intisa->formats[fmt].name);
return -1;
}
*valp = (*get_fn) (slotbuf);
return 0;
}
int
xtensa_operand_set_field (xtensa_isa isa, xtensa_opcode opc, int opnd,
xtensa_format fmt, int slot,
xtensa_insnbuf slotbuf, uint32 val)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *) isa;
xtensa_operand_internal *intop;
int slot_id;
xtensa_set_field_fn set_fn;