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| author | Shen-Ta Hsieh <ibmibmibm.tw@gmail.com> | 2021-05-24 09:43:12 +0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-06-27 07:56:57 -0700 |
| commit | eb9066203f6e07128d42f771def4b7ad37b25dc1 (patch) | |
| tree | ae5cce761a496d4d1b9ec2f911ec0bbc5638d007 /sysdeps/ieee754/flt-32 | |
| parent | 1683249d17e14827b6579529742eb895027dfa84 (diff) | |
| download | glibc-eb9066203f6e07128d42f771def4b7ad37b25dc1.zip glibc-eb9066203f6e07128d42f771def4b7ad37b25dc1.tar.gz glibc-eb9066203f6e07128d42f771def4b7ad37b25dc1.tar.bz2 | |
Use GCC builtins for roundeven functions if desired.
This patch is using the corresponding GCC builtin for roundevenf,
roundeven and roundevenl if the USE_FUNCTION_BUILTIN macros are defined
to one in math-use-builtins.h.
These builtin functions is supported since GCC 10.
The code of the generic implementation is not changed.
Signed-off-by: Shen-Ta Hsieh <ibmibmibm.tw@gmail.com>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'sysdeps/ieee754/flt-32')
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_roundevenf.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sysdeps/ieee754/flt-32/s_roundevenf.c b/sysdeps/ieee754/flt-32/s_roundevenf.c index 2cc0d7b..4f56857 100644 --- a/sysdeps/ieee754/flt-32/s_roundevenf.c +++ b/sysdeps/ieee754/flt-32/s_roundevenf.c @@ -21,6 +21,7 @@ #include <math.h> #include <math_private.h> #include <libm-alias-float.h> +#include <math-use-builtins.h> #include <stdint.h> #define BIAS 0x7f @@ -30,6 +31,9 @@ float __roundevenf (float x) { +#if USE_ROUNDEVENF_BUILTIN + return __builtin_roundevenf (x); +#else uint32_t ix, ux; GET_FLOAT_WORD (ix, x); ux = ix & 0x7fffffff; @@ -67,6 +71,7 @@ __roundevenf (float x) ix &= 0x80000000; SET_FLOAT_WORD (x, ix); return x; +#endif /* ! USE_ROUNDEVENF_BUILTIN */ } #ifndef __roundevenf libm_alias_float (__roundeven, roundeven) |