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soft float support

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1336 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-03-13 17:01:47 +00:00
parent 4ecc31906d
commit 7a0e1f41ce
9 changed files with 139 additions and 231 deletions
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78
target-i386/helper.c
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@ -2541,13 +2541,11 @@ void helper_fbld_ST0_A0(void)
void helper_fbst_ST0_A0(void)
{
CPU86_LDouble tmp;
int v;
target_ulong mem_ref, mem_end;
int64_t val;
tmp = rint(ST0);
val = (int64_t)tmp;
val = floatx_to_int64(ST0, &env->fp_status);
mem_ref = A0;
mem_end = mem_ref + 9;
if (val < 0) {
@ -2740,29 +2738,7 @@ void helper_fsincos(void)
void helper_frndint(void)
{
CPU86_LDouble a;
a = ST0;
#ifdef __arm__
switch(env->fpuc & RC_MASK) {
default:
case RC_NEAR:
asm("rndd %0, %1" : "=f" (a) : "f"(a));
break;
case RC_DOWN:
asm("rnddm %0, %1" : "=f" (a) : "f"(a));
break;
case RC_UP:
asm("rnddp %0, %1" : "=f" (a) : "f"(a));
break;
case RC_CHOP:
asm("rnddz %0, %1" : "=f" (a) : "f"(a));
break;
}
#else
a = rint(a);
#endif
ST0 = a;
ST0 = floatx_round_to_int(ST0, &env->fp_status);
}
void helper_fscale(void)
@ -3263,25 +3239,43 @@ float approx_rcp(float a)
return 1.0 / a;
}
/* XXX: find a better solution */
double helper_sqrt(double a)
void update_fp_status(void)
{
return sqrt(a);
}
int rnd_type;
/* XXX: move that to another file */
#if defined(__powerpc__)
/* better to call an helper on ppc */
float int32_to_float32(int32_t a)
{
return (float)a;
}
double int32_to_float64(int32_t a)
{
return (double)a;
}
/* set rounding mode */
switch(env->fpuc & RC_MASK) {
default:
case RC_NEAR:
rnd_type = float_round_nearest_even;
break;
case RC_DOWN:
rnd_type = float_round_down;
break;
case RC_UP:
rnd_type = float_round_up;
break;
case RC_CHOP:
rnd_type = float_round_to_zero;
break;
}
set_float_rounding_mode(rnd_type, &env->fp_status);
#ifdef FLOATX80
switch((env->fpuc >> 8) & 3) {
case 0:
rnd_type = 32;
break;
case 2:
rnd_type = 64;
break;
case 3:
default:
rnd_type = 80;
break;
}
set_floatx80_rounding_precision(rnd_type, &env->fp_status);
#endif
}
#if !defined(CONFIG_USER_ONLY)