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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 | |
| parent | 62560ee84095274bab1050817f42e782df226a17 (diff) | |
| download | glibc-1ac9c1cf87216bf9f8ac4f7c9754d025d9f2c4ae.tar.gz glibc-1ac9c1cf87216bf9f8ac4f7c9754d025d9f2c4ae.tar.xz glibc-1ac9c1cf87216bf9f8ac4f7c9754d025d9f2c4ae.zip | |
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')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_trunc.c | 6 | ||||
| -rw-r--r-- | sysdeps/ieee754/float128/float128_private.h | 3 | ||||
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_truncf.c | 6 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_truncl.c | 6 |
4 files changed, 21 insertions, 0 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_trunc.c b/sysdeps/ieee754/dbl-64/s_trunc.c index 0de68ce298..c3129fea7b 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) diff --git a/sysdeps/ieee754/float128/float128_private.h b/sysdeps/ieee754/float128/float128_private.h index 01881b574a..9cd3a63f11 100644 --- a/sysdeps/ieee754/float128/float128_private.h +++ b/sysdeps/ieee754/float128/float128_private.h @@ -148,6 +148,8 @@ #define USE_FLOORL_BUILTIN USE_FLOORF128_BUILTIN #undef USE_CEILL_BUILTIN #define USE_CEILL_BUILTIN USE_CEILF128_BUILTIN +#undef USE_TRUNCL_BUILTIN +#define USE_TRUNCL_BUILTIN USE_TRUNCF128_BUILTIN /* IEEE function renames. */ #define __ieee754_acoshl __ieee754_acoshf128 @@ -355,6 +357,7 @@ #define __builtin_rintl __builtin_rintf128 #define __builtin_floorl __builtin_floorf128 #define __builtin_ceill __builtin_ceilf128 +#define __builtin_truncl __builtin_truncf128 /* Get the constant suffix from bits/floatn-compat.h. */ #define L(x) __f128 (x) diff --git a/sysdeps/ieee754/flt-32/s_truncf.c b/sysdeps/ieee754/flt-32/s_truncf.c index e587706b5b..274638820e 100644 --- a/sysdeps/ieee754/flt-32/s_truncf.c +++ b/sysdeps/ieee754/flt-32/s_truncf.c @@ -22,11 +22,16 @@ #include <math_private.h> #include <libm-alias-float.h> +#include <math-use-builtins.h> float __truncf (float x) { +#if USE_TRUNCF_BUILTIN + return __builtin_truncf (x); +#else + /* Use generic implementation. */ int32_t i0, j0; int sx; @@ -49,6 +54,7 @@ __truncf (float x) } return x; +#endif /* ! USE_TRUNCF_BUILTIN */ } #ifndef __truncf libm_alias_float (__trunc, trunc) diff --git a/sysdeps/ieee754/ldbl-128/s_truncl.c b/sysdeps/ieee754/ldbl-128/s_truncl.c index de4dd34d59..d11ab937e2 100644 --- a/sysdeps/ieee754/ldbl-128/s_truncl.c +++ b/sysdeps/ieee754/ldbl-128/s_truncl.c @@ -23,11 +23,16 @@ #include <math_private.h> #include <libm-alias-ldouble.h> +#include <math-use-builtins.h> _Float128 __truncl (_Float128 x) { +#if USE_TRUNCL_BUILTIN + return __builtin_truncl (x); +#else + /* Use generic implementation. */ int32_t j0; uint64_t i0, i1, sx; @@ -54,5 +59,6 @@ __truncl (_Float128 x) } return x; +#endif /* ! USE_TRUNCL_BUILTIN */ } libm_alias_ldouble (__trunc, trunc) |