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| author | Aurelien Jarno <aurelien@aurel32.net> | 2016-08-02 09:18:59 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2016-08-02 09:18:59 +0200 |
| commit | 062e53c195b4a87754632c7d51254867247698b4 (patch) | |
| tree | 93cf3b7c6ab4e94af89443e99d2020dda46929c8 /sysdeps/alpha/fpu | |
| parent | e720d3d9fea2058adb3de2905f1a399ad3e812ff (diff) | |
| download | glibc-062e53c195b4a87754632c7d51254867247698b4.tar glibc-062e53c195b4a87754632c7d51254867247698b4.tar.gz glibc-062e53c195b4a87754632c7d51254867247698b4.tar.bz2 glibc-062e53c195b4a87754632c7d51254867247698b4.zip | |
alpha: fix ceil on sNaN input
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.
Diffstat (limited to 'sysdeps/alpha/fpu')
| -rw-r--r-- | sysdeps/alpha/fpu/s_ceil.c | 7 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/s_ceilf.c | 7 |
2 files changed, 6 insertions, 8 deletions
diff --git a/sysdeps/alpha/fpu/s_ceil.c b/sysdeps/alpha/fpu/s_ceil.c index c1ff864d4b..e9c350af1c 100644 --- a/sysdeps/alpha/fpu/s_ceil.c +++ b/sysdeps/alpha/fpu/s_ceil.c @@ -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)); diff --git a/sysdeps/alpha/fpu/s_ceilf.c b/sysdeps/alpha/fpu/s_ceilf.c index 7e63a6fe94..77e01a99f7 100644 --- a/sysdeps/alpha/fpu/s_ceilf.c +++ b/sysdeps/alpha/fpu/s_ceilf.c @@ -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)); |