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| author | Stefan Liebler <stli@linux.ibm.com> | 2019-12-11 15:09:24 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2019-12-11 15:12:18 +0100 |
| commit | f82996f8159981619ac7ed8a4c1838c2ad72ab61 (patch) | |
| tree | 684c4c0fad4471c925d49b8772d60e35e9ca5de6 /sysdeps/ieee754/flt-32 | |
| parent | 1ac9c1cf87216bf9f8ac4f7c9754d025d9f2c4ae (diff) | |
| download | glibc-f82996f8159981619ac7ed8a4c1838c2ad72ab61.zip glibc-f82996f8159981619ac7ed8a4c1838c2ad72ab61.tar.gz glibc-f82996f8159981619ac7ed8a4c1838c2ad72ab61.tar.bz2 | |
Use GCC builtins for round functions if desired.
This patch is using the corresponding GCC builtin for roundf, round,
roundl and roundf128 if the USE_FUNCTION_BUILTIN macros are defined to one
in math-use-builtins.h.
This is the case for s390 if build with at least --march=z196 --mzarch.
Otherwise the generic implementation is used. The code of the generic
implementation is not changed.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'sysdeps/ieee754/flt-32')
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_roundf.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sysdeps/ieee754/flt-32/s_roundf.c b/sysdeps/ieee754/flt-32/s_roundf.c index cddab7b..5d91239 100644 --- a/sysdeps/ieee754/flt-32/s_roundf.c +++ b/sysdeps/ieee754/flt-32/s_roundf.c @@ -22,11 +22,16 @@ #include <math_private.h> #include <libm-alias-float.h> +#include <math-use-builtins.h> float __roundf (float x) { +#if USE_ROUNDF_BUILTIN + return __builtin_roundf (x); +#else + /* Use generic implementation. */ int32_t i0, j0; GET_FLOAT_WORD (i0, x); @@ -61,5 +66,6 @@ __roundf (float x) SET_FLOAT_WORD (x, i0); return x; +#endif /* ! USE_ROUNDF_BUILTIN */ } libm_alias_float (__round, round) |