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| author | Stefan Liebler <stli@linux.ibm.com> | 2019-12-11 15:09:22 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2019-12-11 15:12:17 +0100 |
| commit | 1ac9c1cf87216bf9f8ac4f7c9754d025d9f2c4ae (patch) | |
| tree | 8c87cea663ef68ef46470f8d96a0c0c833062428 /sysdeps/ieee754/dbl-64/s_trunc.c | |
| parent | 62560ee84095274bab1050817f42e782df226a17 (diff) | |
| download | glibc-1ac9c1cf87216bf9f8ac4f7c9754d025d9f2c4ae.zip glibc-1ac9c1cf87216bf9f8ac4f7c9754d025d9f2c4ae.tar.gz glibc-1ac9c1cf87216bf9f8ac4f7c9754d025d9f2c4ae.tar.bz2 | |
Use GCC builtins for trunc functions if desired.
This patch is using the corresponding GCC builtin for truncf, trunc,
truncl and truncf128 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/dbl-64/s_trunc.c')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_trunc.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_trunc.c b/sysdeps/ieee754/dbl-64/s_trunc.c index 0de68ce..c3129fe 100644 --- a/sysdeps/ieee754/dbl-64/s_trunc.c +++ b/sysdeps/ieee754/dbl-64/s_trunc.c @@ -22,11 +22,16 @@ #include <math_private.h> #include <libm-alias-double.h> +#include <math-use-builtins.h> double __trunc (double x) { +#if USE_TRUNC_BUILTIN + return __builtin_trunc (x); +#else + /* Use generic implementation. */ int64_t i0, j0; int64_t sx; @@ -49,6 +54,7 @@ __trunc (double x) } return x; +#endif /* ! USE_TRUNC_BUILTIN */ } #ifndef __trunc libm_alias_double (__trunc, trunc) |