#include "as.h"
#include "xtensa-isa.h"
#include "xtensa-relax.h"
#include <stddef.h>
#include "xtensa-config.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;
int 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;
ReqOptionList *options;
};
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;
int 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 ? IsaUseDensityInstruction", "add %ar,%as,%at"},
{"addi.n %ar,%as,%imm ? IsaUseDensityInstruction", "addi %ar,%as,%imm"},
{"beqz.n %as,%label ? IsaUseDensityInstruction", "beqz %as,%label"},
{"bnez.n %as,%label ? IsaUseDensityInstruction", "bnez %as,%label"},
{"l32i.n %at,%as,%imm ? IsaUseDensityInstruction", "l32i %at,%as,%imm"},
{"mov.n %at,%as ? IsaUseDensityInstruction", "or %at,%as,%as"},
{"movi.n %as,%imm ? IsaUseDensityInstruction", "movi %as,%imm"},
{"nop.n ? IsaUseDensityInstruction ? realnop", "nop"},
{"nop.n ? IsaUseDensityInstruction ? no-realnop", "or 1,1,1"},
{"ret.n %as ? IsaUseDensityInstruction", "ret %as"},
{"retw.n %as ? IsaUseDensityInstruction", "retw %as"},
{"s32i.n %at,%as,%imm ? IsaUseDensityInstruction", "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 ? IsaUseL32R ",
"LITERAL0 %imm; l32r %at,%LITERAL0"},
{"movi %at,%imm ? IsaUseConst16",
"const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm)"},
{"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 ? IsaUseL32R",
"LITERAL0 %imm; l32r %ar,%LITERAL0; add %ar,%as,%ar"},
{"addmi %ar,%as,%imm | %ar!=%as ? IsaUseConst16",
"const16 %ar,HI16U(%imm); const16 %ar,LOW16U(%imm); add %ar,%as,%ar"},
{"l8ui %at,%as,%imm | %at!=%as ? IsaUseL32R",
"LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l8ui %at,%at,0"},
{"l16si %at,%as,%imm | %at!=%as ? IsaUseL32R",
"LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l16si %at,%at,0"},
{"l16ui %at,%as,%imm | %at!=%as ? IsaUseL32R",
"LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l16ui %at,%at,0"},
{"l32i %at,%as,%imm | %at!=%as ? IsaUseL32R",
"LITERAL0 %imm; l32r %at,%LITERAL0; add %at,%at,%as; l32i %at,%at,0"},
{"l8ui %at,%as,%imm | %at!=%as ? IsaUseConst16",
"const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l8ui %at,%at,0"},
{"l16si %at,%as,%imm | %at!=%as ? IsaUseConst16",
"const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l16si %at,%at,0"},
{"l16ui %at,%as,%imm | %at!=%as ? IsaUseConst16",
"const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l16ui %at,%at,0"},
{"l32i %at,%as,%imm | %at!=%as ? IsaUseConst16",
"const16 %at,HI16U(%imm); const16 %at,LOW16U(%imm); add %at,%at,%as; l32i %at,%at,0"},
{"loop %as,%label | %as!=1 ? IsaUseLoops",
"loop %as,%LABEL0;"
"rsr.lend %as;"
"wsr.lbeg %as;"
"addi %as, %as, 0;"
"addmi %as, %as, 0;"
"wsr.lend %as;"
"isync;"
"rsr.lcount %as;"
"addi %as, %as, 1;"
"LABEL0"},
{"loopgtz %as,%label | %as!=1 ? IsaUseLoops",
"beqz %as,%label;"
"bltz %as,%label;"
"loopgtz %as,%LABEL0;"
"rsr.lend %as;"
"wsr.lbeg %as;"
"addi %as, %as, 0;"
"addmi %as, %as, 0;"
"wsr.lend %as;"
"isync;"
"rsr.lcount %as;"
"addi %as, %as, 1;"
"LABEL0"},
{"loopnez %as,%label | %as!=1 ? IsaUseLoops",
"beqz %as,%label;"
"loopnez %as,%LABEL0;"
"rsr.lend %as;"
"wsr.lbeg %as;"
"addi %as, %as, 0;"
"addmi %as, %as, 0;"
"wsr.lend %as;"
"isync;"
"rsr.lcount %as;"
"addi %as, %as, 1;"
"LABEL0"},
{"beqz %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%LABEL0;j %label;LABEL0"},
{"bnez %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%LABEL0;j %label;LABEL0"},
{"beqz %as,%label", "bnez %as,%LABEL0;j %label;LABEL0"},
{"bnez %as,%label", "beqz %as,%LABEL0;j %label;LABEL0"},
{"beqzt %as,%label ? IsaUsePredictedBranches", "bnez %as,%LABEL0;j %label;LABEL0"},
{"bnezt %as,%label ? IsaUsePredictedBranches", "beqz %as,%LABEL0;j %label;LABEL0"},
{"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"},
{"beqt %as,%at,%label ? IsaUsePredictedBranches", "bne %as,%at,%LABEL0;j %label;LABEL0"},
{"bnet %as,%at,%label ? IsaUsePredictedBranches", "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"},
{"bt %bs,%label ? IsaUseBooleans", "bf %bs,%LABEL0;j %label;LABEL0"},
{"bf %bs,%label ? IsaUseBooleans", "bt %bs,%LABEL0;j %label;LABEL0"},
{"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,%ar0 ? IsaUseL32R",
"LITERAL0 %label; l32r a0,%LITERAL0; callx0 a0,%ar0"},
{"call4 %label,%ar4 ? IsaUseL32R",
"LITERAL0 %label; l32r a4,%LITERAL0; callx4 a4,%ar4"},
{"call8 %label,%ar8 ? IsaUseL32R",
"LITERAL0 %label; l32r a8,%LITERAL0; callx8 a8,%ar8"},
{"call12 %label,%ar12 ? IsaUseL32R",
"LITERAL0 %label; l32r a12,%LITERAL0; callx12 a12,%ar12"},
{"call0 %label,%ar0 ? IsaUseConst16",
"const16 a0,HI16U(%label); const16 a0,LOW16U(%label); callx0 a0,%ar0"},
{"call4 %label,%ar4 ? IsaUseConst16",
"const16 a4,HI16U(%label); const16 a4,LOW16U(%label); callx4 a4,%ar4"},
{"call8 %label,%ar8 ? IsaUseConst16",
"const16 a8,HI16U(%label); const16 a8,LOW16U(%label); callx8 a8,%ar8"},
{"call12 %label,%ar12 ? IsaUseConst16",
"const16 a12,HI16U(%label); const16 a12,LOW16U(%label); callx12 a12,%ar12"}
};
#define WIDEN_COUNT (sizeof (widen_spec_list) / sizeof (string_pattern_pair))
string_pattern_pair simplify_spec_list[] =
{
{"add %ar,%as,%at ? IsaUseDensityInstruction", "add.n %ar,%as,%at"},
{"addi.n %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"},
{"addi %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"},
{"addi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"},
{"addmi %ar,%as,%imm ? IsaUseDensityInstruction", "addi.n %ar,%as,%imm"},
{"beqz %as,%label ? IsaUseDensityInstruction", "beqz.n %as,%label"},
{"bnez %as,%label ? IsaUseDensityInstruction", "bnez.n %as,%label"},
{"l32i %at,%as,%imm ? IsaUseDensityInstruction", "l32i.n %at,%as,%imm"},
{"movi %as,%imm ? IsaUseDensityInstruction", "movi.n %as,%imm"},
{"nop ? realnop ? IsaUseDensityInstruction", "nop.n"},
{"or %ar,%as,%at | %ar==%as | %as==%at ? IsaUseDensityInstruction", "nop.n"},
{"or %ar,%as,%at | %ar!=%as | %as==%at ? IsaUseDensityInstruction", "mov.n %ar,%as"},
{"ret %as ? IsaUseDensityInstruction", "ret.n %as"},
{"retw %as ? IsaUseDensityInstruction", "retw.n %as"},
{"s32i %at,%as,%imm ? IsaUseDensityInstruction", "s32i.n %at,%as,%imm"},
{"slli %ar,%as,0 ? IsaUseDensityInstruction", "mov.n %ar,%as"}
};
#define SIMPLIFY_COUNT \
(sizeof (simplify_spec_list) / sizeof (string_pattern_pair))
extern bfd_boolean xg_has_userdef_op_fn (OpType);
extern long xg_apply_userdef_op_fn (OpType, long);
static void
append_transition (TransitionTable *tt,
xtensa_opcode opcode,
TransitionRule *t,
transition_cmp_fn cmp)
{
TransitionList *tl = (TransitionList *) xmalloc (sizeof (TransitionList));
TransitionList *prev;
TransitionList **t_p;
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;
}
for (t_p = &tt->table[opcode]; (*t_p) != NULL; t_p = &(*t_p)->next)
{
if (cmp && cmp (t, (*t_p)->rule) < 0)
{
tl->next = *t_p;
*t_p = tl;
return;
}
}
(*t_p) = tl;
}
static void
append_condition (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;
}
static void
append_value_condition (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);
}
static void
append_constant_value_condition (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);
}
static void
append_build_insn (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;
}
static void
append_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;
}
static void
append_literal_op (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);
}
static void
append_label_op (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);
}
static void
append_constant_op (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);
}
static void
append_field_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);
}
static void
append_user_fn_field_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);
}
static long
operand_function_HI24S (long a)
{
if (a & 0x80)
return (a & (~0xff)) + 0x100;
else
return (a & (~0xff));
}
static long
operand_function_F32MINUS (long a)
{
return (32 - a);
}
static long
operand_function_LOW8 (long a)
{
if (a & 0x80)
return (a & 0xff) | ~0xff;
else
return (a & 0xff);
}
static long
operand_function_LOW16U (long a)
{
return (a & 0xffff);
}
static long
operand_function_HI16U (long a)
{
unsigned long b = a & 0xffff0000;
return (long) (b >> 16);
}
bfd_boolean
xg_has_userdef_op_fn (OpType op)
{
switch (op)
{
case OP_OPERAND_F32MINUS:
case OP_OPERAND_LOW8:
case OP_OPERAND_HI24S:
case OP_OPERAND_LOW16U:
case OP_OPERAND_HI16U:
return TRUE;
default:
break;
}
return FALSE;
}
long
xg_apply_userdef_op_fn (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);
case OP_OPERAND_LOW16U:
return operand_function_LOW16U (a);
case OP_OPERAND_HI16U:
return operand_function_HI16U (a);
default:
break;
}
return FALSE;
}
static const char *
enter_opname_n (const char *name, int len)
{
opname_e *op;
for (op = local_opnames; op != NULL; op = op->next)
{
if (strlen (op->opname) == (unsigned) 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 (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 = xstrdup (name);
return op->opname;
}
static void
init_opname_map (opname_map *m)
{
m->head = NULL;
m->tail = &m->head;
}
static void
clear_opname_map (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 (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);
}
static opname_map_e *
get_opmatch (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;
}
static bfd_boolean
op_is_constant (const opname_map_e *m1)
{
return (m1->operand_name == NULL);
}
static unsigned
op_get_constant (const opname_map_e *m1)
{
assert (m1->operand_name == NULL);
return m1->constant_value;
}
static void
init_precond_list (precond_list *l)
{
l->head = NULL;
l->tail = &l->head;
}
static void
clear_precond_list (precond_list *l)
{
precond_e *e;
while (l->head != NULL)
{
e = l->head;
l->head = e->next;
free (e);
}
l->tail = &l->head;
}
static void
init_insn_templ (insn_templ *t)
{
t->opcode_name = NULL;
init_opname_map (&t->operand_map);
}
static void
clear_insn_templ (insn_templ *t)
{
clear_opname_map (&t->operand_map);
}
static void
init_insn_pattern (insn_pattern *p)
{
init_insn_templ (&p->t);
init_precond_list (&p->preconds);
p->options = NULL;
}
static void
clear_insn_pattern (insn_pattern *p)
{
clear_insn_templ (&p->t);
clear_precond_list (&p->preconds);
}
static void
init_insn_repl (insn_repl *r)
{
r->head = NULL;
r->tail = &r->head;
}
static void
clear_insn_repl (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 int
insn_templ_operand_count (const insn_templ *t)
{
int i = 0;
const opname_map_e *op;
for (op = t->operand_map.head; op != NULL; op = op->next, i++)
;
return i;
}
static bfd_boolean
parse_constant (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;
}
static bfd_boolean
parse_id_constant (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 (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;
}
static const char *
skip_white (const char *p)
{
if (p == NULL)
return p;
while (*p == ' ')
++p;
return p;
}
static void
trim_whitespace (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';
}
static void
split_string (split_rec *rec,
const char *in,
char c,
bfd_boolean elide_whitespace)
{
int cnt = 0;
int 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;
int len;
q = p;
if (elide_whitespace)
q = skip_white (q);
p = strchr (q, c);
if (p == NULL)
rec->vec[i] = xstrdup (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]);
}
}
static void
clear_split_rec (split_rec *rec)
{
int i;
for (i = 0; i < rec->count; i++)
free (rec->vec[i]);
if (rec->count > 0)
free (rec->vec);
}
static void
init_split_rec (split_rec *rec)
{
rec->vec = NULL;
rec->count = 0;
}
static bfd_boolean
parse_insn_templ (const char *s, insn_templ *t)
{
const char *p = s;
int insn_name_len;
split_rec oprec;
int 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;
}
static bfd_boolean
parse_precond (const char *s, precond_e *precond)
{
const char *p = s;
int 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;
}
static void
clear_req_or_option_list (ReqOrOption **r_p)
{
if (*r_p == NULL)
return;
free ((*r_p)->option_name);
clear_req_or_option_list (&(*r_p)->next);
*r_p = NULL;
}
static void
clear_req_option_list (ReqOption **r_p)
{
if (*r_p == NULL)
return;
clear_req_or_option_list (&(*r_p)->or_option_terms);
clear_req_option_list (&(*r_p)->next);
*r_p = NULL;
}
static ReqOrOption *
clone_req_or_option_list (ReqOrOption *req_or_option)
{
ReqOrOption *new_req_or_option;
if (req_or_option == NULL)
return NULL;
new_req_or_option = (ReqOrOption *) xmalloc (sizeof (ReqOrOption));
new_req_or_option->option_name = xstrdup (req_or_option->option_name);
new_req_or_option->is_true = req_or_option->is_true;
new_req_or_option->next = NULL;
new_req_or_option->next = clone_req_or_option_list (req_or_option->next);
return new_req_or_option;
}
static ReqOption *
clone_req_option_list (ReqOption *req_option)
{
ReqOption *new_req_option;
if (req_option == NULL)
return NULL;
new_req_option = (ReqOption *) xmalloc (sizeof (ReqOption));
new_req_option->or_option_terms = NULL;
new_req_option->next = NULL;
new_req_option->or_option_terms =
clone_req_or_option_list (req_option->or_option_terms);
new_req_option->next = clone_req_option_list (req_option->next);
return new_req_option;
}
static bfd_boolean
parse_option_cond (const char *s, ReqOption *option)
{
int i;
split_rec option_term_rec;
init_split_rec (&option_term_rec);
split_string (&option_term_rec, s, '+', TRUE);
if (option_term_rec.count == 0)
{
clear_split_rec (&option_term_rec);
return FALSE;
}
for (i = 0; i < option_term_rec.count; i++)
{
char *option_name = option_term_rec.vec[i];
bfd_boolean is_true = TRUE;
ReqOrOption *req;
ReqOrOption **r_p;
if (strncmp (option_name, "no-", 3) == 0)
{
option_name = xstrdup (&option_name[3]);
is_true = FALSE;
}
else
option_name = xstrdup (option_name);
req = (ReqOrOption *) xmalloc (sizeof (ReqOrOption));
req->option_name = option_name;
req->is_true = is_true;
req->next = NULL;
for (r_p = &option->or_option_terms; (*r_p) != NULL;
r_p = &(*r_p)->next)
;
(*r_p) = req;
}
return TRUE;
}
static bfd_boolean
parse_insn_pattern (const char *in, insn_pattern *insn)
{
split_rec rec;
split_rec optionrec;
int i;
init_insn_pattern (insn);
init_split_rec (&optionrec);
split_string (&optionrec, in, '?', TRUE);
if (optionrec.count == 0)
{
clear_split_rec (&optionrec);
return FALSE;
}
init_split_rec (&rec);
split_string (&rec, optionrec.vec[0], '|', TRUE);
if (rec.count == 0)
{
clear_split_rec (&rec);
clear_split_rec (&optionrec);
return FALSE;
}
if (!parse_insn_templ (rec.vec[0], &insn->t))
{
clear_split_rec (&rec);
clear_split_rec (&optionrec);
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_split_rec (&optionrec);
clear_insn_pattern (insn);
return FALSE;
}
*insn->preconds.tail = cond;
insn->preconds.tail = &cond->next;
}
for (i = 1; i < optionrec.count; i++)
{
ReqOption **r_p;
ReqOption *req_option = (ReqOption *) xmalloc (sizeof (ReqOption));
req_option->or_option_terms = NULL;
req_option->next = NULL;
if (!parse_option_cond (optionrec.vec[i], req_option))
{
clear_split_rec (&rec);
clear_split_rec (&optionrec);
clear_insn_pattern (insn);
clear_req_option_list (&req_option);
return FALSE;
}
for (r_p = &insn->options; (*r_p) != NULL; r_p = &(*r_p)->next)
;
(*r_p) = req_option;
}
clear_split_rec (&rec);
clear_split_rec (&optionrec);
return TRUE;
}
static bfd_boolean
parse_insn_repl (const char *in, insn_repl *r_p)
{
split_rec rec;
int 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;
}
static bfd_boolean
transition_applies (insn_pattern *initial_insn,
const char *from_string ATTRIBUTE_UNUSED,
const char *to_string ATTRIBUTE_UNUSED)
{
ReqOption *req_option;
for (req_option = initial_insn->options;
req_option != NULL;
req_option = req_option->next)
{
ReqOrOption *req_or_option = req_option->or_option_terms;
if (req_or_option == NULL
|| req_or_option->next != NULL)
continue;
if (strncmp (req_or_option->option_name, "IsaUse", 6) == 0)
{
bfd_boolean option_available = FALSE;
char *option_name = req_or_option->option_name + 6;
if (!strcmp (option_name, "DensityInstruction"))
option_available = (XCHAL_HAVE_DENSITY == 1);
else if (!strcmp (option_name, "L32R"))
option_available = (XCHAL_HAVE_L32R == 1);
else if (!strcmp (option_name, "Const16"))
option_available = (XCHAL_HAVE_CONST16 == 1);
else if (!strcmp (option_name, "Loops"))
option_available = (XCHAL_HAVE_LOOPS == 1);
else if (!strcmp (option_name, "PredictedBranches"))
option_available = (XCHAL_HAVE_PREDICTED_BRANCHES == 1);
else if (!strcmp (option_name, "Booleans"))
option_available = (XCHAL_HAVE_BOOLEANS == 1);
else
as_warn (_("invalid configuration option '%s' in transition rule '%s'"),
req_or_option->option_name, from_string);
if ((option_available ^ req_or_option->is_true) != 0)
return FALSE;
}
else if (strcmp (req_or_option->option_name, "realnop") == 0)
{
bfd_boolean nop_available =
(xtensa_opcode_lookup (xtensa_default_isa, "nop")
!= XTENSA_UNDEFINED);
if ((nop_available ^ req_or_option->is_true) != 0)
return FALSE;
}
}
return TRUE;
}
static TransitionRule *
build_transition (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)
{
return NULL;
}
if (xtensa_opcode_num_operands (isa, opcode)
!= insn_templ_operand_count (&initial_insn->t))
{
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->opval2);
else
append_constant_value_condition (tr, precond->cmpop,
op2->operand_num, precond->opval1);
}
tr->options = clone_req_option_list (initial_insn->options);
for (r = replace_insns->head; r != NULL; r = r->next)
{
BuildInstr *bi;
const char *opcode_name;
int 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)
{
as_warn (_("invalid opcode '%s' in transition rule '%s'"),
r->t.opcode_name, to_string);
return NULL;
}
if (xtensa_opcode_num_operands (isa, bi->opcode)
!= (int) operand_count)
as_fatal (_("opcode '%s': replacement does not have %d ops"),
opcode_name,
xtensa_opcode_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 if (strcmp (fn_name, "LOW16U") == 0)
typ = OP_OPERAND_LOW16U;
else if (strcmp (fn_name, "HI16U") == 0)
typ = OP_OPERAND_HI16U;
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;
}
static TransitionTable *
build_transition_table (const string_pattern_pair *transitions,
int transition_count,
transition_cmp_fn cmp)
{
TransitionTable *table = NULL;
int num_opcodes = xtensa_isa_num_opcodes (xtensa_default_isa);
int i, 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;
}
if (transition_applies (&initial_insn, from_string, to_string))
{
tr = build_transition (&initial_insn, &replace_insns,
from_string, to_string);
if (tr)
append_transition (table, tr->opcode, tr, cmp);
else
{
#if TENSILICA_DEBUG
as_warn (_("could not build transition for %s => %s"),
from_string, to_string);
#endif
}
}
clear_insn_repl (&replace_insns);
clear_insn_pattern (&initial_insn);
}
return table;
}
extern TransitionTable *
xg_build_widen_table (transition_cmp_fn cmp)
{
static TransitionTable *table = NULL;
if (table == NULL)
table = build_transition_table (widen_spec_list, WIDEN_COUNT, cmp);
return table;
}
extern TransitionTable *
xg_build_simplify_table (transition_cmp_fn cmp)
{
static TransitionTable *table = NULL;
if (table == NULL)
table = build_transition_table (simplify_spec_list, SIMPLIFY_COUNT, cmp);
return table;
}