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| author | Stefan Liebler <stli@linux.ibm.com> | 2019-12-11 15:09:18 +0100 |
|---|---|---|
| committer | Stefan Liebler <stli@linux.ibm.com> | 2019-12-11 15:12:15 +0100 |
| commit | ae3577f607b50bf3ce9b0877e43ad2508c9da61b (patch) | |
| tree | b284b10fc26c0454a71be353759f3d2f892b06e0 /sysdeps/ieee754/ldbl-128 | |
| parent | 36e9acbd5cb2c330c0d53195db4a0ee31f2c3097 (diff) | |
| download | glibc-ae3577f607b50bf3ce9b0877e43ad2508c9da61b.zip glibc-ae3577f607b50bf3ce9b0877e43ad2508c9da61b.tar.gz glibc-ae3577f607b50bf3ce9b0877e43ad2508c9da61b.tar.bz2 | |
Use GCC builtins for nearbyint functions if desired.
This patch is using the corresponding GCC builtin for nearbyintf, nearbyint,
nearbintl and nearbyintf128 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/ldbl-128')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_nearbyintl.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/sysdeps/ieee754/ldbl-128/s_nearbyintl.c b/sysdeps/ieee754/ldbl-128/s_nearbyintl.c index f044cb4..a4ad8e8 100644 --- a/sysdeps/ieee754/ldbl-128/s_nearbyintl.c +++ b/sysdeps/ieee754/ldbl-128/s_nearbyintl.c @@ -28,15 +28,19 @@ #include <math-barriers.h> #include <math_private.h> #include <libm-alias-ldouble.h> - -static const _Float128 -TWO112[2]={ - L(5.19229685853482762853049632922009600E+33), /* 0x406F000000000000, 0 */ - L(-5.19229685853482762853049632922009600E+33) /* 0xC06F000000000000, 0 */ -}; +#include <math-use-builtins.h> _Float128 __nearbyintl(_Float128 x) { +#if USE_NEARBYINTL_BUILTIN + return __builtin_nearbyintl (x); +#else + /* Use generic implementation. */ + static const _Float128 + TWO112[2] = { + L(5.19229685853482762853049632922009600E+33), /* 0x406F000000000000, 0 */ + L(-5.19229685853482762853049632922009600E+33) /* 0xC06F000000000000, 0 */ + }; fenv_t env; int64_t i0,j0,sx; uint64_t i1 __attribute__ ((unused)); @@ -65,5 +69,6 @@ _Float128 __nearbyintl(_Float128 x) math_force_eval (t); fesetenv (&env); return t; +#endif /* ! USE_NEARBYINTL_BUILTIN */ } libm_alias_ldouble (__nearbyint, nearbyint) |