#include "as.h"
#include "xtensa-isa.h"
#include "xtensa-relax.h"
#include <stddef.h>
extern xtensa_isa xtensa_default_isa;
typedef struct opname_list_struct opname_list;
typedef opname_list opname_e;
struct opname_list_struct
{
char *opname;
opname_list *next;
};
static opname_list *local_opnames = NULL;
typedef struct opname_map_e_struct opname_map_e;
typedef struct opname_map_struct opname_map;
struct opname_map_e_struct
{
const char *operand_name;
size_t operand_num;
unsigned constant_value;
opname_map_e *next;
};
struct opname_map_struct
{
opname_map_e *head;
opname_map_e **tail;
};
typedef struct precond_e_struct precond_e;
typedef struct precond_list_struct precond_list;
struct precond_e_struct
{
const char *opname1;
unsigned opval1;
CmpOp cmpop;
const char *opname2;
unsigned opval2;
precond_e *next;
};
struct precond_list_struct
{
precond_e *head;
precond_e **tail;
};
typedef struct insn_templ_struct insn_templ;
struct insn_templ_struct
{
const char *opcode_name;
opname_map operand_map;
};
typedef struct insn_pattern_struct insn_pattern;
struct insn_pattern_struct
{
insn_templ t;
precond_list preconds;
};
typedef struct insn_repl_e_struct insn_repl_e;
struct insn_repl_e_struct
{
insn_templ t;
insn_repl_e *next;
};
typedef struct insn_repl_struct insn_repl;
struct insn_repl_struct
{
insn_repl_e *head;
insn_repl_e **tail;
};
typedef struct split_rec_struct split_rec;
struct split_rec_struct
{
char **vec;
size_t count;
};
typedef struct string_pattern_pair_struct string_pattern_pair;
struct string_pattern_pair_struct
{
const char *pattern;
const char *replacement;
};
static string_pattern_pair widen_spec_list[] =
{
{"add.n %ar,%as,%at", "add %ar,%as,%at"},
{"addi.n %ar,%as,%imm", "addi %ar,%as,%imm"},
{"beqz.n %as,%label", "beqz %as,%label"},
{"bnez.n %as,%label", "bnez %as,%label"},
{"l32i.n %at,%as,%imm", "l32i %at,%as,%imm"},
{"mov.n %at,%as", "or %at,%as,%as"},
{"movi.n %as,%imm", "movi %as,%imm"},
{"nop.n", "or 1,1,1"},
{"ret.n", "ret"},
{"retw.n", "retw"},
{"s32i.n %at,%as,%imm", "s32i %at,%as,%imm"},
{"srli %at,%as,%imm", "extui %at,%as,%imm,F32MINUS(%imm)"},
{"slli %ar,%as,0", "or %ar,%as,%as"},
{"movi %at,%imm", "LITERAL0 %imm; l32r %at,%LITERAL0"},
{"addi %ar,%as,%imm", "addmi %ar,%as,%imm"},
{"addmi %ar,%as,%imm", "addmi %ar,%as,HI24S(%imm); addi %ar,%ar,LOW8(%imm)"},
{"addmi %ar,%as,%imm | %ar!=%as",
"LITERAL0 %imm; l32r %ar,%LITERAL0; add %ar,%as,%ar"},
{"l8ui %at,%as,%imm | %at!=%as",
"LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l8ui %at,%at,0"},
{"l16si %at,%as,%imm | %at!=%as",
"LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l16si %at,%at,0"},
{"l16ui %at,%as,%imm | %at!=%as",
"LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l16ui %at,%at,0"},
#if 0
{"l32ai %at,%as,%imm",
"LITERAL0 %imm; l32r %at,%LITERAL0; add.n %at,%at,%as; l32ai %at,%at,0"},
#endif
#if 0
{"l32is %at,%as,%imm",
"LITERAL0 %imm; l32r %at,%LITERAL0; add.n %at,%at,%as; l32is %at,%at,0"},
#endif
{"l32i %at,%as,%imm | %at!=%as",
"LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l32i %at,%at,0"},
{"loop %as,%label",
"loop %as,%LABEL0;"
"rsr %as, 1;"
"wsr %as, 0;"
"addi %as, %as, 0;"
"addmi %as, %as, 0;"
"wsr %as, 1;"
"isync;"
"rsr %as, 2;"
"addi %as, %as, 1;"
"LABEL0"},
{"loopgtz %as,%label",
"beqz %as,%label;"
"bltz %as,%label;"
"loopgtz %as,%LABEL0;"
"rsr %as, 1;"
"wsr %as, 0;"
"addi %as, %as, 0;"
"addmi %as, %as, 0;"
"wsr %as, 1;"
"isync;"
"rsr %as, 2;"
"addi %as, %as, 1;"
"LABEL0"},
{"loopnez %as,%label",
"beqz %as,%label;"
"loopnez %as,%LABEL0;"
"rsr %as, 1;"
"wsr %as, 0;"
"addi %as, %as, 0;"
"addmi %as, %as, 0;"
"wsr %as, 1;"
"isync;"
"rsr %as, 2;"
"addi %as, %as, 1;"
"LABEL0"},
#if 0
{"beqz %as,%label", "bnez.n %as,%LABEL0;j %label;LABEL0"},
{"bnez %as,%label", "beqz.n %as,%LABEL0;j %label;LABEL0"},
#else
{"beqz %as,%label", "bnez %as,%LABEL0;j %label;LABEL0"},
{"bnez %as,%label", "beqz %as,%LABEL0;j %label;LABEL0"},
#endif
{"bgez %as,%label", "bltz %as,%LABEL0;j %label;LABEL0"},
{"bltz %as,%label", "bgez %as,%LABEL0;j %label;LABEL0"},
{"beqi %as,%imm,%label", "bnei %as,%imm,%LABEL0;j %label;LABEL0"},
{"bnei %as,%imm,%label", "beqi %as,%imm,%LABEL0;j %label;LABEL0"},
{"bgei %as,%imm,%label", "blti %as,%imm,%LABEL0;j %label;LABEL0"},
{"blti %as,%imm,%label", "bgei %as,%imm,%LABEL0;j %label;LABEL0"},
{"bgeui %as,%imm,%label", "bltui %as,%imm,%LABEL0;j %label;LABEL0"},
{"bltui %as,%imm,%label", "bgeui %as,%imm,%LABEL0;j %label;LABEL0"},
{"bbci %as,%imm,%label", "bbsi %as,%imm,%LABEL0;j %label;LABEL0"},
{"bbsi %as,%imm,%label", "bbci %as,%imm,%LABEL0;j %label;LABEL0"},
{"beq %as,%at,%label", "bne %as,%at,%LABEL0;j %label;LABEL0"},
{"bne %as,%at,%label", "beq %as,%at,%LABEL0;j %label;LABEL0"},
{"bge %as,%at,%label", "blt %as,%at,%LABEL0;j %label;LABEL0"},
{"blt %as,%at,%label", "bge %as,%at,%LABEL0;j %label;LABEL0"},
{"bgeu %as,%at,%label", "bltu %as,%at,%LABEL0;j %label;LABEL0"},
{"bltu %as,%at,%label", "bgeu %as,%at,%LABEL0;j %label;LABEL0"},
{"bany %as,%at,%label", "bnone %as,%at,%LABEL0;j %label;LABEL0"},
#if 1
{"bt %bs,%label", "bf %bs,%LABEL0;j %label;LABEL0"},
{"bf %bs,%label", "bt %bs,%LABEL0;j %label;LABEL0"},
#endif
{"bnone %as,%at,%label", "bany %as,%at,%LABEL0;j %label;LABEL0"},
{"ball %as,%at,%label", "bnall %as,%at,%LABEL0;j %label;LABEL0"},
{"bnall %as,%at,%label", "ball %as,%at,%LABEL0;j %label;LABEL0"},
{"bbc %as,%at,%label", "bbs %as,%at,%LABEL0;j %label;LABEL0"},
{"bbs %as,%at,%label", "bbc %as,%at,%LABEL0;j %label;LABEL0"},
{"call0 %label", "LITERAL0 %label; l32r a0,%LITERAL0; callx0 a0"},
{"call4 %label", "LITERAL0 %label; l32r a4,%LITERAL0; callx4 a4"},
{"call8 %label", "LITERAL0 %label; l32r a8,%LITERAL0; callx8 a8"},
{"call12 %label", "LITERAL0 %label; l32r a12,%LITERAL0; callx12 a12"}
};
#define WIDEN_COUNT (sizeof (widen_spec_list) / sizeof (string_pattern_pair))
string_pattern_pair simplify_spec_list[] =
{
{"add %ar,%as,%at", "add.n %ar,%as,%at"},
{"addi.n %ar,%as,0", "mov.n %ar,%as"},
{"addi %ar,%as,0", "mov.n %ar,%as"},
{"addi %ar,%as,%imm", "addi.n %ar,%as,%imm"},
{"addmi %ar,%as,%imm", "addi.n %ar,%as,%imm"},
{"beqz %as,%label", "beqz.n %as,%label"},
{"bnez %as,%label", "bnez.n %as,%label"},
{"l32i %at,%as,%imm", "l32i.n %at,%as,%imm"},
{"movi %as,%imm", "movi.n %as,%imm"},
{"or %ar,%as,%at | %as==%at", "mov.n %ar,%as"},
{"ret", "ret.n"},
{"retw", "retw.n"},
{"s32i %at,%as,%imm", "s32i.n %at,%as,%imm"},
{"slli %ar,%as,0", "mov.n %ar,%as"}
};
#define SIMPLIFY_COUNT \
(sizeof (simplify_spec_list) / sizeof (string_pattern_pair))
static void append_transition
PARAMS ((TransitionTable *, xtensa_opcode, TransitionRule *));
static void append_condition
PARAMS ((TransitionRule *, Precondition *));
static void append_value_condition
PARAMS ((TransitionRule *, CmpOp, unsigned, unsigned));
static void append_constant_value_condition
PARAMS ((TransitionRule *, CmpOp, unsigned, unsigned));
static void append_build_insn
PARAMS ((TransitionRule *, BuildInstr *));
static void append_op
PARAMS ((BuildInstr *, BuildOp *));
static void append_literal_op
PARAMS ((BuildInstr *, unsigned, unsigned));
static void append_label_op
PARAMS ((BuildInstr *, unsigned, unsigned));
static void append_constant_op
PARAMS ((BuildInstr *, unsigned, unsigned));
static void append_field_op
PARAMS ((BuildInstr *, unsigned, unsigned));
static void append_user_fn_field_op
PARAMS ((BuildInstr *, unsigned, OpType, unsigned));
static long operand_function_HI24S
PARAMS ((long));
static long operand_function_F32MINUS
PARAMS ((long));
static long operand_function_LOW8
PARAMS ((long));
extern bfd_boolean xg_has_userdef_op_fn
PARAMS ((OpType));
extern long xg_apply_userdef_op_fn
PARAMS ((OpType, long));
static const char *enter_opname_n
PARAMS ((const char *, size_t));
static const char *enter_opname
PARAMS ((const char *));
static void init_opname_map
PARAMS ((opname_map *));
static void clear_opname_map
PARAMS ((opname_map *));
static void init_precond_list
PARAMS ((precond_list *));
static void clear_precond_list
PARAMS ((precond_list *));
static void init_insn_templ
PARAMS ((insn_templ *));
static void clear_insn_templ
PARAMS ((insn_templ *));
static void init_insn_pattern
PARAMS ((insn_pattern *));
static void clear_insn_pattern
PARAMS ((insn_pattern *));
static void init_insn_repl
PARAMS ((insn_repl *));
static void clear_insn_repl
PARAMS ((insn_repl *));
static void init_split_rec
PARAMS ((split_rec *));
static void clear_split_rec
PARAMS ((split_rec *));
static bfd_boolean same_operand_name
PARAMS ((const opname_map_e *, const opname_map_e *));
static opname_map_e *get_opmatch
PARAMS ((opname_map *, const char *));
static bfd_boolean op_is_constant
PARAMS ((const opname_map_e *));
static unsigned op_get_constant
PARAMS ((const opname_map_e *));
static size_t insn_templ_operand_count
PARAMS ((const insn_templ *));
static const char *skip_white
PARAMS ((const char *));
static void trim_whitespace
PARAMS ((char *));
static void split_string
PARAMS ((split_rec *, const char *, char, bfd_boolean));
static bfd_boolean parse_insn_pattern
PARAMS ((const char *, insn_pattern *));
static bfd_boolean parse_insn_repl
PARAMS ((const char *, insn_repl *));
static bfd_boolean parse_insn_templ
PARAMS ((const char *, insn_templ *));
static bfd_boolean parse_special_fn
PARAMS ((const char *, const char **, const char **));
static bfd_boolean parse_precond
PARAMS ((const char *, precond_e *));
static bfd_boolean parse_constant
PARAMS ((const char *, unsigned *));
static bfd_boolean parse_id_constant
PARAMS ((const char *, const char *, unsigned *));
static TransitionRule *build_transition
PARAMS ((insn_pattern *, insn_repl *, const char *, const char *));
static TransitionTable *build_transition_table
PARAMS ((const string_pattern_pair *, size_t));
void
append_transition (tt, opcode, t)
TransitionTable *tt;
xtensa_opcode opcode;
TransitionRule *t;
{
TransitionList *tl = (TransitionList *) xmalloc (sizeof (TransitionList));
TransitionList *prev;
TransitionList *nxt;
assert (tt != NULL);
assert (opcode < tt->num_opcodes);
prev = tt->table[opcode];
tl->rule = t;
tl->next = NULL;
if (prev == NULL)
{
tt->table[opcode] = tl;
return;
}
nxt = prev->next;
while (nxt != NULL)
{
prev = nxt;
nxt = nxt->next;
}
prev->next = tl;
}
void
append_condition (tr, cond)
TransitionRule *tr;
Precondition *cond;
{
PreconditionList *pl =
(PreconditionList *) xmalloc (sizeof (PreconditionList));
PreconditionList *prev = tr->conditions;
PreconditionList *nxt;
pl->precond = cond;
pl->next = NULL;
if (prev == NULL)
{
tr->conditions = pl;
return;
}
nxt = prev->next;
while (nxt != NULL)
{
prev = nxt;
nxt = nxt->next;
}
prev->next = pl;
}
void
append_value_condition (tr, cmp, op1, op2)
TransitionRule *tr;
CmpOp cmp;
unsigned op1;
unsigned op2;
{
Precondition *cond = (Precondition *) xmalloc (sizeof (Precondition));
cond->cmp = cmp;
cond->op_num = op1;
cond->typ = OP_OPERAND;
cond->op_data = op2;
append_condition (tr, cond);
}
void
append_constant_value_condition (tr, cmp, op1, cnst)
TransitionRule *tr;
CmpOp cmp;
unsigned op1;
unsigned cnst;
{
Precondition *cond = (Precondition *) xmalloc (sizeof (Precondition));
cond->cmp = cmp;
cond->op_num = op1;
cond->typ = OP_CONSTANT;
cond->op_data = cnst;
append_condition (tr, cond);
}
void
append_build_insn (tr, bi)
TransitionRule *tr;
BuildInstr *bi;
{
BuildInstr *prev = tr->to_instr;
BuildInstr *nxt;
bi->next = NULL;
if (prev == NULL)
{
tr->to_instr = bi;
return;
}
nxt = prev->next;
while (nxt != 0)
{
prev = nxt;
nxt = prev->next;
}
prev->next = bi;
}
void
append_op (bi, b_op)
BuildInstr *bi;
BuildOp *b_op;
{
BuildOp *prev = bi->ops;
BuildOp *nxt;
if (prev == NULL)
{
bi->ops = b_op;
return;
}
nxt = prev->next;
while (nxt != NULL)
{
prev = nxt;
nxt = nxt->next;
}
prev->next = b_op;
}
void
append_literal_op (bi, op1, litnum)
BuildInstr *bi;
unsigned op1;
unsigned litnum;
{
BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp));
b_op->op_num = op1;
b_op->typ = OP_LITERAL;
b_op->op_data = litnum;
b_op->next = NULL;
append_op (bi, b_op);
}
void
append_label_op (bi, op1, labnum)
BuildInstr *bi;
unsigned op1;
unsigned labnum;
{
BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp));
b_op->op_num = op1;
b_op->typ = OP_LABEL;
b_op->op_data = labnum;
b_op->next = NULL;
append_op (bi, b_op);
}
void
append_constant_op (bi, op1, cnst)
BuildInstr *bi;
unsigned op1;
unsigned cnst;
{
BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp));
b_op->op_num = op1;
b_op->typ = OP_CONSTANT;
b_op->op_data = cnst;
b_op->next = NULL;
append_op (bi, b_op);
}
void
append_field_op (bi, op1, src_op)
BuildInstr *bi;
unsigned op1;
unsigned src_op;
{
BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp));
b_op->op_num = op1;
b_op->typ = OP_OPERAND;
b_op->op_data = src_op;
b_op->next = NULL;
append_op (bi, b_op);
}
void
append_user_fn_field_op (bi, op1, typ, src_op)
BuildInstr *bi;
unsigned op1;
OpType typ;
unsigned src_op;
{
BuildOp *b_op = (BuildOp *) xmalloc (sizeof (BuildOp));
b_op->op_num = op1;
b_op->typ = typ;
b_op->op_data = src_op;
b_op->next = NULL;
append_op (bi, b_op);
}
long
operand_function_HI24S (a)
long a;
{
if (a & 0x80)
return (a & (~0xff)) + 0x100;
else
return (a & (~0xff));
}
long
operand_function_F32MINUS (a)
long a;
{
return (32 - a);
}
long
operand_function_LOW8 (a)
long a;
{
if (a & 0x80)
return (a & 0xff) | ~0xff;
else
return (a & 0xff);
}
bfd_boolean
xg_has_userdef_op_fn (op)
OpType op;
{
switch (op)
{
case OP_OPERAND_F32MINUS:
case OP_OPERAND_LOW8:
case OP_OPERAND_HI24S:
return TRUE;
default:
break;
}
return FALSE;
}
long
xg_apply_userdef_op_fn (op, a)
OpType op;
long a;
{
switch (op)
{
case OP_OPERAND_F32MINUS:
return operand_function_F32MINUS (a);
case OP_OPERAND_LOW8:
return operand_function_LOW8 (a);
case OP_OPERAND_HI24S:
return operand_function_HI24S (a);
default:
break;
}
return FALSE;
}
const char *
enter_opname_n (name, len)
const char *name;
size_t len;
{
opname_e *op;
for (op = local_opnames; op != NULL; op = op->next)
{
if (strlen (op->opname) == len && strncmp (op->opname, name, len) == 0)
return op->opname;
}
op = (opname_e *) xmalloc (sizeof (opname_e));
op->opname = (char *) xmalloc (len + 1);
strncpy (op->opname, name, len);
op->opname[len] = '\0';
return op->opname;
}
static const char *
enter_opname (name)
const char *name;
{
opname_e *op;
for (op = local_opnames; op != NULL; op = op->next)
{
if (strcmp (op->opname, name) == 0)
return op->opname;
}
op = (opname_e *) xmalloc (sizeof (opname_e));
op->opname = strdup (name);
return op->opname;
}
void
init_opname_map (m)
opname_map *m;
{
m->head = NULL;
m->tail = &m->head;
}
void
clear_opname_map (m)
opname_map *m;
{
opname_map_e *e;
while (m->head != NULL)
{
e = m->head;
m->head = e->next;
free (e);
}
m->tail = &m->head;
}
static bfd_boolean
same_operand_name (m1, m2)
const opname_map_e *m1;
const opname_map_e *m2;
{
if (m1->operand_name == NULL || m1->operand_name == NULL)
return FALSE;
return (m1->operand_name == m2->operand_name);
}
opname_map_e *
get_opmatch (map, operand_name)
opname_map *map;
const char *operand_name;
{
opname_map_e *m;
for (m = map->head; m != NULL; m = m->next)
{
if (strcmp (m->operand_name, operand_name) == 0)
return m;
}
return NULL;
}
bfd_boolean
op_is_constant (m1)
const opname_map_e *m1;
{
return (m1->operand_name == NULL);
}
static unsigned
op_get_constant (m1)
const opname_map_e *m1;
{
assert (m1->operand_name == NULL);
return m1->constant_value;
}
void
init_precond_list (l)
precond_list *l;
{
l->head = NULL;
l->tail = &l->head;
}
void
clear_precond_list (l)
precond_list *l;
{
precond_e *e;
while (l->head != NULL)
{
e = l->head;
l->head = e->next;
free (e);
}
l->tail = &l->head;
}
void
init_insn_templ (t)
insn_templ *t;
{
t->opcode_name = NULL;
init_opname_map (&t->operand_map);
}
void
clear_insn_templ (t)
insn_templ *t;
{
clear_opname_map (&t->operand_map);
}
void
init_insn_pattern (p)
insn_pattern *p;
{
init_insn_templ (&p->t);
init_precond_list (&p->preconds);
}
void
clear_insn_pattern (p)
insn_pattern *p;
{
clear_insn_templ (&p->t);
clear_precond_list (&p->preconds);
}
void
init_insn_repl (r)
insn_repl *r;
{
r->head = NULL;
r->tail = &r->head;
}
void
clear_insn_repl (r)
insn_repl *r;
{
insn_repl_e *e;
while (r->head != NULL)
{
e = r->head;
r->head = e->next;
clear_insn_templ (&e->t);
}
r->tail = &r->head;
}
static size_t
insn_templ_operand_count (t)
const insn_templ *t;
{
size_t i = 0;
const opname_map_e *op;
for (op = t->operand_map.head; op != NULL; op = op->next, ++i)
;
return i;
}
bfd_boolean
parse_constant (in, val_p)
const char *in;
unsigned *val_p;
{
unsigned val = 0;
const char *p;
if (in == NULL)
return FALSE;
p = in;
while (*p != '\0')
{
if (*p >= '0' && *p <= '9')
val = val * 10 + (*p - '0');
else
return FALSE;
++p;
}
*val_p = val;
return TRUE;
}
bfd_boolean
parse_id_constant (in, name, val_p)
const char *in;
const char *name;
unsigned *val_p;
{
unsigned namelen = 0;
const char *p;
if (in == NULL)
return FALSE;
if (name != NULL)
namelen = strlen (name);
if (name != NULL && strncmp (in, name, namelen) != 0)
return FALSE;
p = &in[namelen];
return parse_constant (p, val_p);
}
static bfd_boolean
parse_special_fn (name, fn_name_p, arg_name_p)
const char *name;
const char **fn_name_p;
const char **arg_name_p;
{
char *p_start;
const char *p_end;
p_start = strchr (name, '(');
if (p_start == NULL)
return FALSE;
p_end = strchr (p_start, ')');
if (p_end == NULL)
return FALSE;
if (p_end[1] != '\0')
return FALSE;
*fn_name_p = enter_opname_n (name, p_start - name);
*arg_name_p = enter_opname_n (p_start + 1, p_end - p_start - 1);
return TRUE;
}
const char *
skip_white (p)
const char *p;
{
if (p == NULL)
return p;
while (*p == ' ')
++p;
return p;
}
void
trim_whitespace (in)
char *in;
{
char *last_white = NULL;
char *p = in;
while (p && *p != '\0')
{
while (*p == ' ')
{
if (last_white == NULL)
last_white = p;
p++;
}
if (*p != '\0')
{
last_white = NULL;
p++;
}
}
if (last_white)
*last_white = '\0';
}
void
split_string (rec, in, c, elide_whitespace)
split_rec *rec;
const char *in;
char c;
bfd_boolean elide_whitespace;
{
size_t cnt = 0;
size_t i;
const char *p = in;
while (p != NULL && *p != '\0')
{
cnt++;
p = strchr (p, c);
if (p)
p++;
}
rec->count = cnt;
rec->vec = NULL;
if (rec->count == 0)
return;
rec->vec = (char **) xmalloc (sizeof (char *) * cnt);
for (i = 0; i < cnt; i++)
rec->vec[i] = 0;
p = in;
for (i = 0; i < cnt; i++)
{
const char *q;
size_t len;
q = p;
if (elide_whitespace)
q = skip_white (q);
p = strchr (q, c);
if (p == NULL)
rec->vec[i] = strdup (q);
else
{
len = p - q;
rec->vec[i] = (char *) xmalloc (sizeof (char) * (len + 1));
strncpy (rec->vec[i], q, len);
rec->vec[i][len] = '\0';
p++;
}
if (elide_whitespace)
trim_whitespace (rec->vec[i]);
}
}
void
clear_split_rec (rec)
split_rec *rec;
{
size_t i;
for (i = 0; i < rec->count; ++i)
free (rec->vec[i]);
if (rec->count > 0)
free (rec->vec);
}
void
init_split_rec (rec)
split_rec *rec;
{
rec->vec = NULL;
rec->count = 0;
}
bfd_boolean
parse_insn_templ (s, t)
const char *s;
insn_templ *t;
{
const char *p = s;
size_t insn_name_len;
split_rec oprec;
size_t i;
init_split_rec (&oprec);
p = skip_white (p);
insn_name_len = strcspn (s, " ");
if (insn_name_len == 0)
return FALSE;
init_insn_templ (t);
t->opcode_name = enter_opname_n (p, insn_name_len);
p = p + insn_name_len;
split_string (&oprec, p, ',', TRUE);
for (i = 0; i < oprec.count; i++)
{
const char *opname = oprec.vec[i];
opname_map_e *e = (opname_map_e *) xmalloc (sizeof (opname_map_e));
e->next = NULL;
e->operand_name = NULL;
e->constant_value = 0;
e->operand_num = i;
if (opname && opname[0] >= '0' && opname[0] <= '9')
{
unsigned val;
if (parse_constant (opname, &val))
e->constant_value = val;
else
{
free (e);
clear_split_rec (&oprec);
clear_insn_templ (t);
return FALSE;
}
}
else
e->operand_name = enter_opname (oprec.vec[i]);
*t->operand_map.tail = e;
t->operand_map.tail = &e->next;
}
clear_split_rec (&oprec);
return TRUE;
}
bfd_boolean
parse_precond (s, precond)
const char *s;
precond_e *precond;
{
const char *p = s;
size_t len;
precond->opname1 = NULL;
precond->opval1 = 0;
precond->cmpop = OP_EQUAL;
precond->opname2 = NULL;
precond->opval2 = 0;
precond->next = NULL;
p = skip_white (p);
len = strcspn (p, " !=");
if (len == 0)
return FALSE;
precond->opname1 = enter_opname_n (p, len);
p = p + len;
p = skip_white (p);
if (strncmp (p, "==", 2) == 0)
precond->cmpop = OP_EQUAL;
else if (strncmp (p, "!=", 2) == 0)
precond->cmpop = OP_NOTEQUAL;
else
return FALSE;
p = p + 2;
p = skip_white (p);
if (p[0] >= '0' && p[0] <= '9')
{
unsigned val;
if (parse_constant (p, &val))
precond->opval2 = val;
else
return FALSE;
}
else
precond->opname2 = enter_opname (p);
return TRUE;
}
bfd_boolean
parse_insn_pattern (in, insn)
const char *in;
insn_pattern *insn;
{
split_rec rec;
size_t i;
init_split_rec (&rec);
init_insn_pattern (insn);
split_string (&rec, in, '|', TRUE);
if (rec.count == 0)
{
clear_split_rec (&rec);
return FALSE;
}
if (!parse_insn_templ (rec.vec[0], &insn->t))
{
clear_split_rec (&rec);
return FALSE;
}
for (i = 1; i < rec.count; i++)
{
precond_e *cond = (precond_e *) xmalloc (sizeof (precond_e));
if (!parse_precond (rec.vec[i], cond))
{
clear_split_rec (&rec);
clear_insn_pattern (insn);
return FALSE;
}
*insn->preconds.tail = cond;
insn->preconds.tail = &cond->next;
}
clear_split_rec (&rec);
return TRUE;
}
bfd_boolean
parse_insn_repl (in, r_p)
const char *in;
insn_repl *r_p;
{
split_rec rec;
size_t i;
split_string (&rec, in, ';', TRUE);
for (i = 0; i < rec.count; i++)
{
insn_repl_e *e = (insn_repl_e *) xmalloc (sizeof (insn_repl_e));
e->next = NULL;
if (!parse_insn_templ (rec.vec[i], &e->t))
{
free (e);
clear_insn_repl (r_p);
return FALSE;
}
*r_p->tail = e;
r_p->tail = &e->next;
}
return TRUE;
}
TransitionRule *
build_transition (initial_insn, replace_insns, from_string, to_string)
insn_pattern *initial_insn;
insn_repl *replace_insns;
const char *from_string;
const char *to_string;
{
TransitionRule *tr = NULL;
xtensa_opcode opcode;
xtensa_isa isa = xtensa_default_isa;
opname_map_e *op1;
opname_map_e *op2;
precond_e *precond;
insn_repl_e *r;
unsigned label_count = 0;
unsigned max_label_count = 0;
bfd_boolean has_label = FALSE;
unsigned literal_count = 0;
opcode = xtensa_opcode_lookup (isa, initial_insn->t.opcode_name);
if (opcode == XTENSA_UNDEFINED)
{
#if 0
as_warn (_("Invalid opcode '%s' in transition rule '%s'\n"),
initial_insn->t.opcode_name, to_string);
#endif
return NULL;
}
if (xtensa_num_operands (isa, opcode)
!= (int) insn_templ_operand_count (&initial_insn->t))
{
#if 0
as_fatal (_("opcode %s mismatched operand count %d != expected %d"),
xtensa_opcode_name (isa, opcode),
xtensa_num_operands (isa, opcode),
insn_templ_operand_count (&initial_insn->t));
#endif
return NULL;
}
tr = (TransitionRule *) xmalloc (sizeof (TransitionRule));
tr->opcode = opcode;
tr->conditions = NULL;
tr->to_instr = NULL;
for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next)
{
for (op2 = op1->next; op2 != NULL; op2 = op2->next)
{
if (same_operand_name (op1, op2))
{
append_value_condition (tr, OP_EQUAL,
op1->operand_num, op2->operand_num);
}
}
}
for (op1 = initial_insn->t.operand_map.head; op1 != NULL; op1 = op1->next)
{
if (op_is_constant (op1))
{
append_constant_value_condition (tr,
OP_EQUAL,
op1->operand_num,
op_get_constant (op1));
}
}
for (precond = initial_insn->preconds.head;
precond != NULL;
precond = precond->next)
{
op1 = NULL;
op2 = NULL;
if (precond->opname1)
{
op1 = get_opmatch (&initial_insn->t.operand_map, precond->opname1);
if (op1 == NULL)
{
as_fatal (_("opcode '%s': no bound opname '%s' "
"for precondition in '%s'"),
xtensa_opcode_name (isa, opcode),
precond->opname1, from_string);
return NULL;
}
}
if (precond->opname2)
{
op2 = get_opmatch (&initial_insn->t.operand_map, precond->opname2);
if (op2 == NULL)
{
as_fatal (_("opcode '%s': no bound opname '%s' "
"for precondition in %s"),
xtensa_opcode_name (isa, opcode),
precond->opname2, from_string);
return NULL;
}
}
if (op1 == NULL && op2 == NULL)
{
as_fatal (_("opcode '%s': precondition only contains "
"constants in '%s'"),
xtensa_opcode_name (isa, opcode), from_string);
return NULL;
}
else if (op1 != NULL && op2 != NULL)
append_value_condition (tr, precond->cmpop,
op1->operand_num, op2->operand_num);
else if (op2 == NULL)
append_constant_value_condition (tr, precond->cmpop,
op1->operand_num, precond->opval1);
else
append_constant_value_condition (tr, precond->cmpop,
op2->operand_num, precond->opval2);
}
for (r = replace_insns->head; r != NULL; r = r->next)
{
BuildInstr *bi;
const char *opcode_name;
size_t operand_count;
opname_map_e *op;
unsigned idnum = 0;
const char *fn_name;
const char *operand_arg_name;
bi = (BuildInstr *) xmalloc (sizeof (BuildInstr));
append_build_insn (tr, bi);
bi->id = 0;
bi->opcode = XTENSA_UNDEFINED;
bi->ops = NULL;
bi->next = NULL;
opcode_name = r->t.opcode_name;
operand_count = insn_templ_operand_count (&r->t);
if (parse_id_constant (opcode_name, "LITERAL", &idnum))
{
bi->typ = INSTR_LITERAL_DEF;
bi->id = idnum;
if (idnum != literal_count)
as_fatal (_("generated literals must be numbered consecutively"));
++literal_count;
if (operand_count != 1)
as_fatal (_("expected one operand for generated literal"));
}
else if (parse_id_constant (opcode_name, "LABEL", &idnum))
{
bi->typ = INSTR_LABEL_DEF;
bi->id = idnum;
if (idnum != label_count)
as_fatal (_("generated labels must be numbered consecutively"));
++label_count;
if (operand_count != 0)
as_fatal (_("expected 0 operands for generated label"));
}
else
{
bi->typ = INSTR_INSTR;
bi->opcode = xtensa_opcode_lookup (isa, r->t.opcode_name);
if (bi->opcode == XTENSA_UNDEFINED)
return NULL;
if (xtensa_num_operands (isa, bi->opcode)
!= (int) operand_count)
as_fatal (_("opcode '%s': replacement does not have %d ops"),
opcode_name, xtensa_num_operands (isa, bi->opcode));
}
for (op = r->t.operand_map.head; op != NULL; op = op->next)
{
unsigned idnum;
if (op_is_constant (op))
append_constant_op (bi, op->operand_num, op_get_constant (op));
else if (parse_id_constant (op->operand_name, "%LITERAL", &idnum))
{
if (idnum >= literal_count)
as_fatal (_("opcode %s: replacement "
"literal %d >= literal_count(%d)"),
opcode_name, idnum, literal_count);
append_literal_op (bi, op->operand_num, idnum);
}
else if (parse_id_constant (op->operand_name, "%LABEL", &idnum))
{
has_label = TRUE;
if (idnum > max_label_count)
max_label_count = idnum;
append_label_op (bi, op->operand_num, idnum);
}
else if (parse_id_constant (op->operand_name, "a", &idnum))
append_constant_op (bi, op->operand_num, idnum);
else if (op->operand_name[0] == '%')
{
opname_map_e *orig_op;
orig_op = get_opmatch (&initial_insn->t.operand_map,
op->operand_name);
if (orig_op == NULL)
{
as_fatal (_("opcode %s: unidentified operand '%s' in '%s'"),
opcode_name, op->operand_name, to_string);
append_constant_op (bi, op->operand_num, 0);
}
else
append_field_op (bi, op->operand_num, orig_op->operand_num);
}
else if (parse_special_fn (op->operand_name,
&fn_name, &operand_arg_name))
{
opname_map_e *orig_op;
OpType typ = OP_CONSTANT;
if (strcmp (fn_name, "LOW8") == 0)
typ = OP_OPERAND_LOW8;
else if (strcmp (fn_name, "HI24S") == 0)
typ = OP_OPERAND_HI24S;
else if (strcmp (fn_name, "F32MINUS") == 0)
typ = OP_OPERAND_F32MINUS;
else
as_fatal (_("unknown user defined function %s"), fn_name);
orig_op = get_opmatch (&initial_insn->t.operand_map,
operand_arg_name);
if (orig_op == NULL)
{
as_fatal (_("opcode %s: unidentified operand '%s' in '%s'"),
opcode_name, op->operand_name, to_string);
append_constant_op (bi, op->operand_num, 0);
}
else
append_user_fn_field_op (bi, op->operand_num,
typ, orig_op->operand_num);
}
else
{
as_fatal (_("opcode %s: could not parse operand '%s' in '%s'"),
opcode_name, op->operand_name, to_string);
append_constant_op (bi, op->operand_num, 0);
}
}
}
if (has_label && max_label_count >= label_count)
{
as_fatal (_("opcode %s: replacement label %d >= label_count(%d)"),
xtensa_opcode_name (isa, opcode),
max_label_count, label_count);
return NULL;
}
return tr;
}
TransitionTable *
build_transition_table (transitions, transition_count)
const string_pattern_pair *transitions;
size_t transition_count;
{
TransitionTable *table = NULL;
int num_opcodes = xtensa_num_opcodes (xtensa_default_isa);
int i;
size_t tnum;
if (table != NULL)
return table;
table = (TransitionTable *) xmalloc (sizeof (TransitionTable));
table->num_opcodes = num_opcodes;
table->table =
(TransitionList **) xmalloc (sizeof (TransitionTable *) * num_opcodes);
for (i = 0; i < num_opcodes; i++)
table->table[i] = NULL;
for (tnum = 0; tnum < transition_count; tnum++)
{
const char *from_string = transitions[tnum].pattern;
const char *to_string = transitions[tnum].replacement;
insn_pattern initial_insn;
insn_repl replace_insns;
TransitionRule *tr;
init_insn_pattern (&initial_insn);
if (!parse_insn_pattern (from_string, &initial_insn))
{
as_fatal (_("could not parse INSN_PATTERN '%s'"), from_string);
clear_insn_pattern (&initial_insn);
continue;
}
init_insn_repl (&replace_insns);
if (!parse_insn_repl (to_string, &replace_insns))
{
as_fatal (_("could not parse INSN_REPL '%s'"), to_string);
clear_insn_pattern (&initial_insn);
clear_insn_repl (&replace_insns);
continue;
}
tr = build_transition (&initial_insn, &replace_insns,
from_string, to_string);
if (tr)
append_transition (table, tr->opcode, tr);
clear_insn_repl (&replace_insns);
clear_insn_pattern (&initial_insn);
}
return table;
}
extern TransitionTable *
xg_build_widen_table ()
{
static TransitionTable *table = NULL;
if (table == NULL)
table = build_transition_table (widen_spec_list, WIDEN_COUNT);
return table;
}
extern TransitionTable *
xg_build_simplify_table ()
{
static TransitionTable *table = NULL;
if (table == NULL)
table = build_transition_table (simplify_spec_list, SIMPLIFY_COUNT);
return table;
}