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PowerPC: Fix modf/modff optimization return sign

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This patch fix the optimized powerpc-fpu modf/modff implementation
when using in non-default rounding mode where the zero sign is not
as expected. It fixes the libm testsuite tests

  modf_downward (0)  == 0.00000000000000000000e+00
  modf_downward (20) == 0.00000000000000000000e+00
  modf_downward (21) == 0.00000000000000000000e+00

Where the sign returned was negative.
This commit is contained in:
Adhemerval Zanella 2014-03-08 11:24:32 -06:00
parent e9996ef750
commit 54b46a4b3e
3 changed files with 10 additions and 4 deletions
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6
ChangeLog
View File

@ -1,3 +1,9 @@
2014-03-03 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
* sysdeps/powerpc/power5+/fpu/s_modf.c (__modf): Fix to return correct
sign in non default rounding modes.
* sysdeps/powerpc/power5+/fpu/s_modff.c (__modff): Likewise.
2014-03-08 Joseph Myers <joseph@codesourcery.com>
* math/libm-test.inc (ALL_RM_TEST): New macro.

4
sysdeps/powerpc/power5+/fpu/s_modf.c
View File

@ -36,12 +36,12 @@ __modf (double x, double *iptr)
if (x >= 0.0)
{
*iptr = __floor (x);
return (x - *iptr);
return __copysign (x - *iptr, x);
}
else
{
*iptr = __ceil (x);
return (x - *iptr);
return __copysign (x - *iptr, x);
}
}
weak_alias (__modf, modf)

4
sysdeps/powerpc/power5+/fpu/s_modff.c
View File

@ -35,12 +35,12 @@ __modff (float x, float *iptr)
if (x >= 0.0)
{
*iptr = __floorf (x);
return (x - *iptr);
return __copysignf (x - *iptr, x);
}
else
{
*iptr = __ceilf (x);
return (x - *iptr);
return __copysignf (x - *iptr, x);
}
}
weak_alias (__modff, modff)