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target-i386: fix helper_fprem() and helper_fprem1() wrt softfloat 

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2011-04-20 13:04:23 +02:00
parent a2c9ed3cbf
commit bcb5fec5af
1 changed files with 28 additions and 20 deletions
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48
target-i386/op_helper.c
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@ -4053,21 +4053,24 @@ void helper_fxtract(void)
void helper_fprem1(void)
{
CPU86_LDouble dblq, fpsrcop, fptemp;
double st0, st1, dblq, fpsrcop, fptemp;
CPU86_LDoubleU fpsrcop1, fptemp1;
int expdif;
signed long long int q;
if (isinf(ST0) || isnan(ST0) || isnan(ST1) || (ST1 == 0.0)) {
ST0 = 0.0 / 0.0; /* NaN */
st0 = CPU86_LDouble_to_double(ST0);
st1 = CPU86_LDouble_to_double(ST1);
if (isinf(st0) || isnan(st0) || isnan(st1) || (st1 == 0.0)) {
ST0 = double_to_CPU86_LDouble(0.0 / 0.0); /* NaN */
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
return;
}
fpsrcop = ST0;
fptemp = ST1;
fpsrcop1.d = fpsrcop;
fptemp1.d = fptemp;
fpsrcop = st0;
fptemp = st1;
fpsrcop1.d = ST0;
fptemp1.d = ST1;
expdif = EXPD(fpsrcop1) - EXPD(fptemp1);
if (expdif < 0) {
@ -4081,7 +4084,7 @@ void helper_fprem1(void)
dblq = fpsrcop / fptemp;
/* round dblq towards nearest integer */
dblq = rint(dblq);
ST0 = fpsrcop - fptemp * dblq;
st0 = fpsrcop - fptemp * dblq;
/* convert dblq to q by truncating towards zero */
if (dblq < 0.0)
@ -4097,31 +4100,35 @@ void helper_fprem1(void)
} else {
env->fpus |= 0x400; /* C2 <-- 1 */
fptemp = pow(2.0, expdif - 50);
fpsrcop = (ST0 / ST1) / fptemp;
fpsrcop = (st0 / st1) / fptemp;
/* fpsrcop = integer obtained by chopping */
fpsrcop = (fpsrcop < 0.0) ?
-(floor(fabs(fpsrcop))) : floor(fpsrcop);
ST0 -= (ST1 * fpsrcop * fptemp);
st0 -= (st1 * fpsrcop * fptemp);
}
ST0 = double_to_CPU86_LDouble(st0);
}
void helper_fprem(void)
{
CPU86_LDouble dblq, fpsrcop, fptemp;
double st0, st1, dblq, fpsrcop, fptemp;
CPU86_LDoubleU fpsrcop1, fptemp1;
int expdif;
signed long long int q;
if (isinf(ST0) || isnan(ST0) || isnan(ST1) || (ST1 == 0.0)) {
ST0 = 0.0 / 0.0; /* NaN */
st0 = CPU86_LDouble_to_double(ST0);
st1 = CPU86_LDouble_to_double(ST1);
if (isinf(st0) || isnan(st0) || isnan(st1) || (st1 == 0.0)) {
ST0 = double_to_CPU86_LDouble(0.0 / 0.0); /* NaN */
env->fpus &= (~0x4700); /* (C3,C2,C1,C0) <-- 0000 */
return;
}
fpsrcop = (CPU86_LDouble)ST0;
fptemp = (CPU86_LDouble)ST1;
fpsrcop1.d = fpsrcop;
fptemp1.d = fptemp;
fpsrcop = st0;
fptemp = st1;
fpsrcop1.d = ST0;
fptemp1.d = ST1;
expdif = EXPD(fpsrcop1) - EXPD(fptemp1);
if (expdif < 0) {
@ -4135,7 +4142,7 @@ void helper_fprem(void)
dblq = fpsrcop/*ST0*/ / fptemp/*ST1*/;
/* round dblq towards zero */
dblq = (dblq < 0.0) ? ceil(dblq) : floor(dblq);
ST0 = fpsrcop/*ST0*/ - fptemp * dblq;
st0 = fpsrcop/*ST0*/ - fptemp * dblq;
/* convert dblq to q by truncating towards zero */
if (dblq < 0.0)
@ -4152,12 +4159,13 @@ void helper_fprem(void)
int N = 32 + (expdif % 32); /* as per AMD docs */
env->fpus |= 0x400; /* C2 <-- 1 */
fptemp = pow(2.0, (double)(expdif - N));
fpsrcop = (ST0 / ST1) / fptemp;
fpsrcop = (st0 / st1) / fptemp;
/* fpsrcop = integer obtained by chopping */
fpsrcop = (fpsrcop < 0.0) ?
-(floor(fabs(fpsrcop))) : floor(fpsrcop);
ST0 -= (ST1 * fpsrcop * fptemp);
st0 -= (st1 * fpsrcop * fptemp);
}
ST0 = double_to_CPU86_LDouble(st0);
}
void helper_fyl2xp1(void)