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fuchsia / third_party / qemu / e33d61cc9aef14f21fbf16c0e3cf01d2e2965717 / . / target / xtensa / xtensa-isa.c
blob: 630b4f9da1b554190eaec13fd9dce0b915bf85c3 [file] [log] [blame]
/* Configurable Xtensa ISA support.
*
* Copyright (c) 2001-2011 Tensilica Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "xtensa-isa.h"
#include "xtensa-isa-internal.h"
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. */
xtensa_isa xtensa_isa_init(void *xtensa_modules, 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 =
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 =
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 =
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] =
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;
if (sreg->number >= 0) {
isa->sysreg_table[is_user][sreg->number] = n;
}
}
/* Set up the interface lookup table. */
isa->interface_lookup_table =
malloc(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 =
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));
isa->num_stages = XTENSA_UNDEFINED;
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 strcasecmp(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, max_stage;
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
/* Only compute the value once. */
if (intisa->num_stages != XTENSA_UNDEFINED) {
return intisa->num_stages;
}
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;
}
}
}
intisa->num_stages = max_stage + 1;
return intisa->num_states;
}
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 (strcasecmp(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" and "_sin" operands. */
if (inout == 's') {
return 'o';
}
if (inout == 't') {
return 'i';
}
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_t *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_t val)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_operand_internal *intop;
int slot_id;
xtensa_set_field_fn set_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;
}
set_fn = intisa->slots[slot_id].set_field_fns[intop->field_id];
if (!set_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;
}
(*set_fn)(slotbuf, val);
return 0;
}
int xtensa_operand_encode(xtensa_isa isa, xtensa_opcode opc, int opnd,
uint32_t *valp)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_operand_internal *intop;
uint32_t test_val, orig_val;
intop = get_operand(intisa, opc, opnd);
if (!intop) {
return -1;
}
if (!intop->encode) {
/*
* This is a default operand for a field. How can we tell if the
* value fits in the field? Write the value into the field,
* read it back, and then make sure we get the same value.
*/
static xtensa_insnbuf tmpbuf;
int slot_id;
if (!tmpbuf) {
tmpbuf = xtensa_insnbuf_alloc(isa);
CHECK_ALLOC(tmpbuf, -1);
}
/*
* A default operand is always associated with a field,
* but check just to be sure....
*/
if (intop->field_id == XTENSA_UNDEFINED) {
xtisa_errno = xtensa_isa_internal_error;
strcpy(xtisa_error_msg, "operand has no field");
return -1;
}
/* Find some slot that includes the field. */
for (slot_id = 0; slot_id < intisa->num_slots; slot_id++) {
xtensa_get_field_fn get_fn =
intisa->slots[slot_id].get_field_fns[intop->field_id];
xtensa_set_field_fn set_fn =
intisa->slots[slot_id].set_field_fns[intop->field_id];
if (get_fn && set_fn) {
(*set_fn)(tmpbuf, *valp);
return (*get_fn)(tmpbuf) != *valp;
}
}
/* Couldn't find any slot containing the field.... */
xtisa_errno = xtensa_isa_no_field;
strcpy(xtisa_error_msg, "field does not exist in any slot");
return -1;
}
/*
* Encode the value. In some cases, the encoding function may detect
* errors, but most of the time the only way to determine if the value
* was successfully encoded is to decode it and check if it matches
* the original value.
*/
orig_val = *valp;
if ((*intop->encode)(valp) ||
(test_val = *valp, (*intop->decode)(&test_val)) ||
test_val != orig_val) {
xtisa_errno = xtensa_isa_bad_value;
sprintf(xtisa_error_msg, "cannot encode operand value 0x%08x", *valp);
return -1;
}
return 0;
}
int xtensa_operand_decode(xtensa_isa isa, xtensa_opcode opc, int opnd,
uint32_t *valp)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_operand_internal *intop;
intop = get_operand(intisa, opc, opnd);
if (!intop) {
return -1;
}
/* Use identity function for "default" operands. */
if (!intop->decode) {
return 0;
}
if ((*intop->decode)(valp)) {
xtisa_errno = xtensa_isa_bad_value;
sprintf(xtisa_error_msg, "cannot decode operand value 0x%08x", *valp);
return -1;
}
return 0;
}
int xtensa_operand_is_register(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 XTENSA_UNDEFINED;
}
if ((intop->flags & XTENSA_OPERAND_IS_REGISTER) != 0) {
return 1;
}
return 0;
}
xtensa_regfile xtensa_operand_regfile(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 XTENSA_UNDEFINED;
}
return intop->regfile;
}
int xtensa_operand_num_regs(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 XTENSA_UNDEFINED;
}
return intop->num_regs;
}
int xtensa_operand_is_known_reg(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 XTENSA_UNDEFINED;
}
if ((intop->flags & XTENSA_OPERAND_IS_UNKNOWN) == 0) {
return 1;
}
return 0;
}
int xtensa_operand_is_PCrelative(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 XTENSA_UNDEFINED;
}
if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) != 0) {
return 1;
}
return 0;
}
int xtensa_operand_do_reloc(xtensa_isa isa, xtensa_opcode opc, int opnd,
uint32_t *valp, uint32_t pc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_operand_internal *intop;
intop = get_operand(intisa, opc, opnd);
if (!intop) {
return -1;
}
if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) == 0) {
return 0;
}
if (!intop->do_reloc) {
xtisa_errno = xtensa_isa_internal_error;
strcpy(xtisa_error_msg, "operand missing do_reloc function");
return -1;
}
if ((*intop->do_reloc)(valp, pc)) {
xtisa_errno = xtensa_isa_bad_value;
sprintf(xtisa_error_msg,
"do_reloc failed for value 0x%08x at PC 0x%08x", *valp, pc);
return -1;
}
return 0;
}
int xtensa_operand_undo_reloc(xtensa_isa isa, xtensa_opcode opc, int opnd,
uint32_t *valp, uint32_t pc)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_operand_internal *intop;
intop = get_operand(intisa, opc, opnd);
if (!intop) {
return -1;
}
if ((intop->flags & XTENSA_OPERAND_IS_PCRELATIVE) == 0) {
return 0;
}
if (!intop->undo_reloc) {
xtisa_errno = xtensa_isa_internal_error;
strcpy(xtisa_error_msg, "operand missing undo_reloc function");
return -1;
}
if ((*intop->undo_reloc)(valp, pc)) {
xtisa_errno = xtensa_isa_bad_value;
sprintf(xtisa_error_msg,
"undo_reloc failed for value 0x%08x at PC 0x%08x", *valp, pc);
return -1;
}
return 0;
}
/* State Operands. */
#define CHECK_STATE_OPERAND(INTISA, OPC, ICLASS, STOP, ERRVAL) \
do { \
if ((STOP) < 0 || (STOP) >= (ICLASS)->num_stateOperands) { \
xtisa_errno = xtensa_isa_bad_operand; \
sprintf(xtisa_error_msg, "invalid state operand number (%d); " \
"opcode \"%s\" has %d state operands", (STOP), \
(INTISA)->opcodes[(OPC)].name, \
(ICLASS)->num_stateOperands); \
return ERRVAL; \
} \
} while (0)
xtensa_state xtensa_stateOperand_state(xtensa_isa isa, xtensa_opcode opc,
int stOp)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_iclass_internal *iclass;
int iclass_id;
CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
iclass_id = intisa->opcodes[opc].iclass_id;
iclass = &intisa->iclasses[iclass_id];
CHECK_STATE_OPERAND(intisa, opc, iclass, stOp, XTENSA_UNDEFINED);
return iclass->stateOperands[stOp].u.state;
}
char xtensa_stateOperand_inout(xtensa_isa isa, xtensa_opcode opc, int stOp)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_iclass_internal *iclass;
int iclass_id;
CHECK_OPCODE(intisa, opc, 0);
iclass_id = intisa->opcodes[opc].iclass_id;
iclass = &intisa->iclasses[iclass_id];
CHECK_STATE_OPERAND(intisa, opc, iclass, stOp, 0);
return iclass->stateOperands[stOp].inout;
}
/* Interface Operands. */
#define CHECK_INTERFACE_OPERAND(INTISA, OPC, ICLASS, IFOP, ERRVAL) \
do { \
if ((IFOP) < 0 || (IFOP) >= (ICLASS)->num_interfaceOperands) { \
xtisa_errno = xtensa_isa_bad_operand; \
sprintf(xtisa_error_msg, \
"invalid interface operand number (%d); " \
"opcode \"%s\" has %d interface operands", (IFOP), \
(INTISA)->opcodes[(OPC)].name, \
(ICLASS)->num_interfaceOperands); \
return ERRVAL; \
} \
} while (0)
xtensa_interface xtensa_interfaceOperand_interface(xtensa_isa isa,
xtensa_opcode opc,
int ifOp)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_iclass_internal *iclass;
int iclass_id;
CHECK_OPCODE(intisa, opc, XTENSA_UNDEFINED);
iclass_id = intisa->opcodes[opc].iclass_id;
iclass = &intisa->iclasses[iclass_id];
CHECK_INTERFACE_OPERAND(intisa, opc, iclass, ifOp, XTENSA_UNDEFINED);
return iclass->interfaceOperands[ifOp];
}
/* Register Files. */
#define CHECK_REGFILE(INTISA, RF, ERRVAL) \
do { \
if ((RF) < 0 || (RF) >= (INTISA)->num_regfiles) { \
xtisa_errno = xtensa_isa_bad_regfile; \
strcpy(xtisa_error_msg, "invalid regfile specifier"); \
return ERRVAL; \
} \
} while (0)
xtensa_regfile xtensa_regfile_lookup(xtensa_isa isa, const char *name)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
int n;
if (!name || !*name) {
xtisa_errno = xtensa_isa_bad_regfile;
strcpy(xtisa_error_msg, "invalid regfile name");
return XTENSA_UNDEFINED;
}
/* The expected number of regfiles is small; use a linear search. */
for (n = 0; n < intisa->num_regfiles; n++) {
if (!strcmp(intisa->regfiles[n].name, name)) {
return n;
}
}
xtisa_errno = xtensa_isa_bad_regfile;
sprintf(xtisa_error_msg, "regfile \"%s\" not recognized", name);
return XTENSA_UNDEFINED;
}
xtensa_regfile xtensa_regfile_lookup_shortname(xtensa_isa isa,
const char *shortname)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
int n;
if (!shortname || !*shortname) {
xtisa_errno = xtensa_isa_bad_regfile;
strcpy(xtisa_error_msg, "invalid regfile shortname");
return XTENSA_UNDEFINED;
}
/* The expected number of regfiles is small; use a linear search. */
for (n = 0; n < intisa->num_regfiles; n++) {
/*
* Ignore regfile views since they always have the same shortnames
* as their parents.
*/
if (intisa->regfiles[n].parent != n) {
continue;
}
if (!strcmp(intisa->regfiles[n].shortname, shortname)) {
return n;
}
}
xtisa_errno = xtensa_isa_bad_regfile;
sprintf(xtisa_error_msg, "regfile shortname \"%s\" not recognized",
shortname);
return XTENSA_UNDEFINED;
}
const char *xtensa_regfile_name(xtensa_isa isa, xtensa_regfile rf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_REGFILE(intisa, rf, NULL);
return intisa->regfiles[rf].name;
}
const char *xtensa_regfile_shortname(xtensa_isa isa, xtensa_regfile rf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_REGFILE(intisa, rf, NULL);
return intisa->regfiles[rf].shortname;
}
xtensa_regfile xtensa_regfile_view_parent(xtensa_isa isa, xtensa_regfile rf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_REGFILE(intisa, rf, XTENSA_UNDEFINED);
return intisa->regfiles[rf].parent;
}
int xtensa_regfile_num_bits(xtensa_isa isa, xtensa_regfile rf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_REGFILE(intisa, rf, XTENSA_UNDEFINED);
return intisa->regfiles[rf].num_bits;
}
int xtensa_regfile_num_entries(xtensa_isa isa, xtensa_regfile rf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_REGFILE(intisa, rf, XTENSA_UNDEFINED);
return intisa->regfiles[rf].num_entries;
}
/* Processor States. */
#define CHECK_STATE(INTISA, ST, ERRVAL) \
do { \
if ((ST) < 0 || (ST) >= (INTISA)->num_states) { \
xtisa_errno = xtensa_isa_bad_state; \
strcpy(xtisa_error_msg, "invalid state specifier"); \
return ERRVAL; \
} \
} while (0)
xtensa_state xtensa_state_lookup(xtensa_isa isa, const char *name)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_lookup_entry entry, *result = 0;
if (!name || !*name) {
xtisa_errno = xtensa_isa_bad_state;
strcpy(xtisa_error_msg, "invalid state name");
return XTENSA_UNDEFINED;
}
if (intisa->num_states != 0) {
entry.key = name;
result = bsearch(&entry, intisa->state_lookup_table,
intisa->num_states, sizeof(xtensa_lookup_entry),
xtensa_isa_name_compare);
}
if (!result) {
xtisa_errno = xtensa_isa_bad_state;
sprintf(xtisa_error_msg, "state \"%s\" not recognized", name);
return XTENSA_UNDEFINED;
}
return result->u.state;
}
const char *xtensa_state_name(xtensa_isa isa, xtensa_state st)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_STATE(intisa, st, NULL);
return intisa->states[st].name;
}
int xtensa_state_num_bits(xtensa_isa isa, xtensa_state st)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_STATE(intisa, st, XTENSA_UNDEFINED);
return intisa->states[st].num_bits;
}
int xtensa_state_is_exported(xtensa_isa isa, xtensa_state st)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_STATE(intisa, st, XTENSA_UNDEFINED);
if ((intisa->states[st].flags & XTENSA_STATE_IS_EXPORTED) != 0) {
return 1;
}
return 0;
}
int xtensa_state_is_shared_or(xtensa_isa isa, xtensa_state st)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_STATE(intisa, st, XTENSA_UNDEFINED);
if ((intisa->states[st].flags & XTENSA_STATE_IS_SHARED_OR) != 0) {
return 1;
}
return 0;
}
/* Sysregs. */
#define CHECK_SYSREG(INTISA, SYSREG, ERRVAL) \
do { \
if ((SYSREG) < 0 || (SYSREG) >= (INTISA)->num_sysregs) { \
xtisa_errno = xtensa_isa_bad_sysreg; \
strcpy(xtisa_error_msg, "invalid sysreg specifier"); \
return ERRVAL; \
} \
} while (0)
xtensa_sysreg xtensa_sysreg_lookup(xtensa_isa isa, int num, int is_user)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
if (is_user != 0) {
is_user = 1;
}
if (num < 0 || num > intisa->max_sysreg_num[is_user] ||
intisa->sysreg_table[is_user][num] == XTENSA_UNDEFINED) {
xtisa_errno = xtensa_isa_bad_sysreg;
strcpy(xtisa_error_msg, "sysreg not recognized");
return XTENSA_UNDEFINED;
}
return intisa->sysreg_table[is_user][num];
}
xtensa_sysreg xtensa_sysreg_lookup_name(xtensa_isa isa, const char *name)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_lookup_entry entry, *result = 0;
if (!name || !*name) {
xtisa_errno = xtensa_isa_bad_sysreg;
strcpy(xtisa_error_msg, "invalid sysreg name");
return XTENSA_UNDEFINED;
}
if (intisa->num_sysregs != 0) {
entry.key = name;
result = bsearch(&entry, intisa->sysreg_lookup_table,
intisa->num_sysregs, sizeof(xtensa_lookup_entry),
xtensa_isa_name_compare);
}
if (!result) {
xtisa_errno = xtensa_isa_bad_sysreg;
sprintf(xtisa_error_msg, "sysreg \"%s\" not recognized", name);
return XTENSA_UNDEFINED;
}
return result->u.sysreg;
}
const char *xtensa_sysreg_name(xtensa_isa isa, xtensa_sysreg sysreg)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_SYSREG(intisa, sysreg, NULL);
return intisa->sysregs[sysreg].name;
}
int xtensa_sysreg_number(xtensa_isa isa, xtensa_sysreg sysreg)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_SYSREG(intisa, sysreg, XTENSA_UNDEFINED);
return intisa->sysregs[sysreg].number;
}
int xtensa_sysreg_is_user(xtensa_isa isa, xtensa_sysreg sysreg)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_SYSREG(intisa, sysreg, XTENSA_UNDEFINED);
if (intisa->sysregs[sysreg].is_user) {
return 1;
}
return 0;
}
/* Interfaces. */
#define CHECK_INTERFACE(INTISA, INTF, ERRVAL) \
do { \
if ((INTF) < 0 || (INTF) >= (INTISA)->num_interfaces) { \
xtisa_errno = xtensa_isa_bad_interface; \
strcpy(xtisa_error_msg, "invalid interface specifier"); \
return ERRVAL; \
} \
} while (0)
xtensa_interface xtensa_interface_lookup(xtensa_isa isa, const char *ifname)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_lookup_entry entry, *result = 0;
if (!ifname || !*ifname) {
xtisa_errno = xtensa_isa_bad_interface;
strcpy(xtisa_error_msg, "invalid interface name");
return XTENSA_UNDEFINED;
}
if (intisa->num_interfaces != 0) {
entry.key = ifname;
result = bsearch(&entry, intisa->interface_lookup_table,
intisa->num_interfaces, sizeof(xtensa_lookup_entry),
xtensa_isa_name_compare);
}
if (!result) {
xtisa_errno = xtensa_isa_bad_interface;
sprintf(xtisa_error_msg, "interface \"%s\" not recognized", ifname);
return XTENSA_UNDEFINED;
}
return result->u.intf;
}
const char *xtensa_interface_name(xtensa_isa isa, xtensa_interface intf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_INTERFACE(intisa, intf, NULL);
return intisa->interfaces[intf].name;
}
int xtensa_interface_num_bits(xtensa_isa isa, xtensa_interface intf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_INTERFACE(intisa, intf, XTENSA_UNDEFINED);
return intisa->interfaces[intf].num_bits;
}
char xtensa_interface_inout(xtensa_isa isa, xtensa_interface intf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_INTERFACE(intisa, intf, 0);
return intisa->interfaces[intf].inout;
}
int xtensa_interface_has_side_effect(xtensa_isa isa, xtensa_interface intf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_INTERFACE(intisa, intf, XTENSA_UNDEFINED);
if ((intisa->interfaces[intf].flags &
XTENSA_INTERFACE_HAS_SIDE_EFFECT) != 0) {
return 1;
}
return 0;
}
int xtensa_interface_class_id(xtensa_isa isa, xtensa_interface intf)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_INTERFACE(intisa, intf, XTENSA_UNDEFINED);
return intisa->interfaces[intf].class_id;
}
/* Functional Units. */
#define CHECK_FUNCUNIT(INTISA, FUN, ERRVAL) \
do { \
if ((FUN) < 0 || (FUN) >= (INTISA)->num_funcUnits) { \
xtisa_errno = xtensa_isa_bad_funcUnit; \
strcpy(xtisa_error_msg, "invalid functional unit specifier"); \
return ERRVAL; \
} \
} while (0)
xtensa_funcUnit xtensa_funcUnit_lookup(xtensa_isa isa, const char *fname)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
xtensa_lookup_entry entry, *result = 0;
if (!fname || !*fname) {
xtisa_errno = xtensa_isa_bad_funcUnit;
strcpy(xtisa_error_msg, "invalid functional unit name");
return XTENSA_UNDEFINED;
}
if (intisa->num_funcUnits != 0) {
entry.key = fname;
result = bsearch(&entry, intisa->funcUnit_lookup_table,
intisa->num_funcUnits, sizeof(xtensa_lookup_entry),
xtensa_isa_name_compare);
}
if (!result) {
xtisa_errno = xtensa_isa_bad_funcUnit;
sprintf(xtisa_error_msg,
"functional unit \"%s\" not recognized", fname);
return XTENSA_UNDEFINED;
}
return result->u.fun;
}
const char *xtensa_funcUnit_name(xtensa_isa isa, xtensa_funcUnit fun)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_FUNCUNIT(intisa, fun, NULL);
return intisa->funcUnits[fun].name;
}
int xtensa_funcUnit_num_copies(xtensa_isa isa, xtensa_funcUnit fun)
{
xtensa_isa_internal *intisa = (xtensa_isa_internal *)isa;
CHECK_FUNCUNIT(intisa, fun, XTENSA_UNDEFINED);
return intisa->funcUnits[fun].num_copies;
}