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alpha: fix ceil on sNaN input

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

Finally remove the code to handle inexact exception, ceil should never
generate such an exception.

Changelog:
	* sysdeps/alpha/fpu/s_ceil.c (__ceil): Add argument with itself
	when it is a NaN.
	[_IEEE_FP_INEXACT] Remove.
	* sysdeps/alpha/fpu/s_ceilf.c (__ceilf): Likewise.
This commit is contained in:
Aurelien Jarno 2016-08-02 09:18:59 +02:00
parent e720d3d9fe
commit 062e53c195
3 changed files with 13 additions and 8 deletions
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7
ChangeLog
View File

@ -1,3 +1,10 @@
2016-08-02 Aurelien Jarno <aurelien@aurel32.net>
* sysdeps/alpha/fpu/s_ceil.c (__ceil): Add argument with itself
when it is a NaN.
[_IEEE_FP_INEXACT] Remove.
* sysdeps/alpha/fpu/s_ceilf.c (__ceilf): Likewise.
2016-08-01 Carlos O'Donell <carlos@redhat.com>
* version.h (RELEASE): Set to "development"

7
sysdeps/alpha/fpu/s_ceil.c
View File

@ -26,17 +26,16 @@
double
__ceil (double x)
{
if (isnan (x))
return x + x;
if (isless (fabs (x), 9007199254740992.0)) /* 1 << DBL_MANT_DIG */
{
double tmp1, new_x;
new_x = -x;
__asm (
#ifdef _IEEE_FP_INEXACT
"cvttq/svim %2,%1\n\t"
#else
"cvttq/svm %2,%1\n\t"
#endif
"cvtqt/m %1,%0\n\t"
: "=f"(new_x), "=&f"(tmp1)
: "f"(new_x));

7
sysdeps/alpha/fpu/s_ceilf.c
View File

@ -25,6 +25,9 @@
float
__ceilf (float x)
{
if (isnanf (x))
return x + x;
if (isless (fabsf (x), 16777216.0f)) /* 1 << FLT_MANT_DIG */
{
/* Note that Alpha S_Floating is stored in registers in a
@ -36,11 +39,7 @@ __ceilf (float x)
new_x = -x;
__asm ("cvtst/s %3,%2\n\t"
#ifdef _IEEE_FP_INEXACT
"cvttq/svim %2,%1\n\t"
#else
"cvttq/svm %2,%1\n\t"
#endif
"cvtqt/m %1,%0\n\t"
: "=f"(new_x), "=&f"(tmp1), "=&f"(tmp2)
: "f"(new_x));