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alpha: fix rint on sNaN input

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The alpha version of rint wrongly return sNaN for sNaN input. Fix that
by checking for NaN and by returning the input value added with itself
in that case.

Changelog:
	* sysdeps/alpha/fpu/s_rint.c (__rint): Add argument with itself
	when it is a NaN.
	* sysdeps/alpha/fpu/s_rintf.c (__rintf): Likewise.
This commit is contained in:
Aurelien Jarno 2016-08-02 09:18:59 +02:00
parent 65cc568cf5
commit cb7f9d63b9
3 changed files with 9 additions and 0 deletions
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3
ChangeLog
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@ -8,6 +8,9 @@
when it is a NaN. when it is a NaN.
[_IEEE_FP_INEXACT] Remove. [_IEEE_FP_INEXACT] Remove.
* sysdeps/alpha/fpu/s_floorf.c (__floorf): Likewise. * sysdeps/alpha/fpu/s_floorf.c (__floorf): Likewise.
* sysdeps/alpha/fpu/s_rint.c (__rint): Add argument with itself
when it is a NaN.
* sysdeps/alpha/fpu/s_rintf.c (__rintf): Likewise.
2016-08-01 Carlos O'Donell <carlos@redhat.com> 2016-08-01 Carlos O'Donell <carlos@redhat.com>

3
sysdeps/alpha/fpu/s_rint.c
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@ -23,6 +23,9 @@
double double
__rint (double x) __rint (double x)
{ {
if (isnan (x))
return x + x;
if (isless (fabs (x), 9007199254740992.0)) /* 1 << DBL_MANT_DIG */ if (isless (fabs (x), 9007199254740992.0)) /* 1 << DBL_MANT_DIG */
{ {
double tmp1, new_x; double tmp1, new_x;

3
sysdeps/alpha/fpu/s_rintf.c
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@ -22,6 +22,9 @@
float float
__rintf (float x) __rintf (float x)
{ {
if (isnanf (x))
return x + x;
if (isless (fabsf (x), 16777216.0f)) /* 1 << FLT_MANT_DIG */ if (isless (fabsf (x), 16777216.0f)) /* 1 << FLT_MANT_DIG */
{ {
/* Note that Alpha S_Floating is stored in registers in a /* Note that Alpha S_Floating is stored in registers in a