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moved bcheck.c outside of tcc - optimized add sp code

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This commit is contained in:
bellard 2002-07-24 22:11:30 +00:00
parent b12e91aa01
commit 58af3a6cd2
1 changed files with 44 additions and 13 deletions
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57
i386-gen.c
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@ -331,6 +331,16 @@ void gfunc_param(GFuncContext *c)
vtop--;
}
static void gadd_sp(int val)
{
if (val == (char)val) {
o(0xc483);
g(val);
} else {
oad(0xc481, val); /* add $xxx, %esp */
}
}
/* generate function call with address in (vtop->t, vtop->c) and free function
context. Stack entry is popped */
void gfunc_call(GFuncContext *c)
@ -353,7 +363,7 @@ void gfunc_call(GFuncContext *c)
o(0xd0 + r);
}
if (c->args_size && c->func_call == FUNC_CDECL)
oad(0xc481, c->args_size); /* add $xxx, %esp */
gadd_sp(c->args_size);
vtop--;
}
@ -409,6 +419,7 @@ void gfunc_epilog(void)
if (do_bounds_check && func_bound_ptr != lbounds_section->data_ptr) {
int saved_ind;
int *bounds_ptr;
Sym *sym, *sym_data;
/* add end of table info */
bounds_ptr = (int *)lbounds_section->data_ptr;
*bounds_ptr++ = 0;
@ -416,13 +427,26 @@ void gfunc_epilog(void)
/* generate bound local allocation */
saved_ind = ind;
ind = (int)func_sub_sp_ptr + 4;
oad(0xb8, (int)func_bound_ptr); /* mov %eax, xxx */
oad(0xe8, (int)__bound_local_new - ind - 5);
sym_data = get_sym_ref(char_pointer_type, lbounds_section,
func_bound_ptr - lbounds_section->data,
lbounds_section->data_ptr - func_bound_ptr);
greloc(cur_text_section, sym_data,
ind + 1 - (int)cur_text_section->data, R_386_32);
oad(0xb8, 0); /* mov %eax, xxx */
sym = external_sym(TOK___bound_local_new, func_old_type, 0);
greloc(cur_text_section, sym,
ind + 1 - (int)cur_text_section->data, R_386_PC32);
oad(0xe8, -4);
ind = saved_ind;
/* generate bound check local freeing */
o(0x5250); /* save returned value, if any */
oad(0xb8, (int)func_bound_ptr); /* mov %eax, xxx */
oad(0xe8, (int)__bound_local_delete - ind - 5);
greloc(cur_text_section, sym_data,
ind + 1 - (int)cur_text_section->data, R_386_32);
oad(0xb8, 0); /* mov %eax, xxx */
sym = external_sym(TOK___bound_local_delete, func_old_type, 0);
greloc(cur_text_section, sym,
ind + 1 - (int)cur_text_section->data, R_386_PC32);
oad(0xe8, -4);
o(0x585a); /* restore returned value, if any */
}
#endif
@ -738,12 +762,6 @@ void gen_opf(int op)
}
}
/* FPU control word for rounding to nearest mode */
/* XXX: should move that into tcc lib support code ! */
static unsigned short __tcc_fpu_control = 0x137f;
/* FPU control word for round to zero mode for int convertion */
static unsigned short __tcc_int_fpu_control = 0x137f | 0x0c00;
/* convert integers to fp 't' type. Must handle 'int', 'unsigned int'
and 'long long' cases. */
void gen_cvt_itof(int t)
@ -779,6 +797,7 @@ void gen_cvt_itof(int t)
void gen_cvt_ftoi(int t)
{
int r, r2, size;
Sym *sym;
gv(RC_FLOAT);
if (t != VT_INT)
@ -786,14 +805,26 @@ void gen_cvt_ftoi(int t)
else
size = 4;
oad(0x2dd9, (int)&__tcc_int_fpu_control); /* ldcw xxx */
o(0x2dd9); /* ldcw xxx */
sym = external_sym(TOK___tcc_int_fpu_control,
VT_SHORT | VT_UNSIGNED, VT_LVAL);
greloc(cur_text_section, sym,
ind - (int)cur_text_section->data, R_386_32);
gen_le32(0);
oad(0xec81, size); /* sub $xxx, %esp */
if (size == 4)
o(0x1cdb); /* fistpl */
else
o(0x3cdf); /* fistpll */
o(0x24);
oad(0x2dd9, (int)&__tcc_fpu_control); /* ldcw xxx */
o(0x2dd9); /* ldcw xxx */
sym = external_sym(TOK___tcc_fpu_control,
VT_SHORT | VT_UNSIGNED, VT_LVAL);
greloc(cur_text_section, sym,
ind - (int)cur_text_section->data, R_386_32);
gen_le32(0);
r = get_reg(RC_INT);
o(0x58 + r); /* pop r */
if (size == 8) {