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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/ldbl-128 | |
| 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/ldbl-128')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_roundevenl.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128/s_roundevenl.c b/sysdeps/ieee754/ldbl-128/s_roundevenl.c index 7c9c11f..afbf13d 100644 --- a/sysdeps/ieee754/ldbl-128/s_roundevenl.c +++ b/sysdeps/ieee754/ldbl-128/s_roundevenl.c @@ -21,6 +21,7 @@ #include <math.h> #include <math_private.h> #include <libm-alias-ldouble.h> +#include <math-use-builtins.h> #include <stdint.h> #define BIAS 0x3fff @@ -30,6 +31,9 @@ _Float128 __roundevenl (_Float128 x) { +#if USE_ROUNDEVENL_BUILTIN + return __builtin_roundevenl (x); +#else uint64_t hx, lx, uhx; GET_LDOUBLE_WORDS64 (hx, lx, x); uhx = hx & 0x7fffffffffffffffULL; @@ -101,5 +105,6 @@ __roundevenl (_Float128 x) } SET_LDOUBLE_WORDS64 (x, hx, lx); return x; +#endif /* ! USE_ROUNDEVENL_BUILTIN */ } libm_alias_ldouble (__roundeven, roundeven) |