diff options
| 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 | |
| parent | 1ac9c1cf87216bf9f8ac4f7c9754d025d9f2c4ae (diff) | |
| download | glibc-f82996f8159981619ac7ed8a4c1838c2ad72ab61.tar glibc-f82996f8159981619ac7ed8a4c1838c2ad72ab61.tar.gz glibc-f82996f8159981619ac7ed8a4c1838c2ad72ab61.tar.bz2 glibc-f82996f8159981619ac7ed8a4c1838c2ad72ab61.zip | |
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')
| -rw-r--r-- | sysdeps/ieee754/dbl-64/s_round.c | 6 | ||||
| -rw-r--r-- | sysdeps/ieee754/float128/float128_private.h | 3 | ||||
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_roundf.c | 6 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_roundl.c | 6 |
4 files changed, 21 insertions, 0 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_round.c b/sysdeps/ieee754/dbl-64/s_round.c index 8f4b7cff86..7eb1ecb482 100644 --- a/sysdeps/ieee754/dbl-64/s_round.c +++ b/sysdeps/ieee754/dbl-64/s_round.c @@ -23,11 +23,16 @@ #include <math_private.h> #include <libm-alias-double.h> #include <stdint.h> +#include <math-use-builtins.h> double __round (double x) { +#if USE_ROUND_BUILTIN + return __builtin_round (x); +#else + /* Use generic implementation. */ int64_t i0, j0; EXTRACT_WORDS64 (i0, x); @@ -62,5 +67,6 @@ __round (double x) INSERT_WORDS64 (x, i0); return x; +#endif /* ! USE_ROUND_BUILTIN */ } libm_alias_double (__round, round) diff --git a/sysdeps/ieee754/float128/float128_private.h b/sysdeps/ieee754/float128/float128_private.h index 9cd3a63f11..a6c76ce364 100644 --- a/sysdeps/ieee754/float128/float128_private.h +++ b/sysdeps/ieee754/float128/float128_private.h @@ -150,6 +150,8 @@ #define USE_CEILL_BUILTIN USE_CEILF128_BUILTIN #undef USE_TRUNCL_BUILTIN #define USE_TRUNCL_BUILTIN USE_TRUNCF128_BUILTIN +#undef USE_ROUNDL_BUILTIN +#define USE_ROUNDL_BUILTIN USE_ROUNDF128_BUILTIN /* IEEE function renames. */ #define __ieee754_acoshl __ieee754_acoshf128 @@ -358,6 +360,7 @@ #define __builtin_floorl __builtin_floorf128 #define __builtin_ceill __builtin_ceilf128 #define __builtin_truncl __builtin_truncf128 +#define __builtin_roundl __builtin_roundf128 /* Get the constant suffix from bits/floatn-compat.h. */ #define L(x) __f128 (x) diff --git a/sysdeps/ieee754/flt-32/s_roundf.c b/sysdeps/ieee754/flt-32/s_roundf.c index cddab7b505..5d91239d6e 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) diff --git a/sysdeps/ieee754/ldbl-128/s_roundl.c b/sysdeps/ieee754/ldbl-128/s_roundl.c index d41c9a04dc..8c7ae82217 100644 --- a/sysdeps/ieee754/ldbl-128/s_roundl.c +++ b/sysdeps/ieee754/ldbl-128/s_roundl.c @@ -23,11 +23,16 @@ #include <math_private.h> #include <libm-alias-ldouble.h> +#include <math-use-builtins.h> _Float128 __roundl (_Float128 x) { +#if USE_ROUNDL_BUILTIN + return __builtin_roundl (x); +#else + /* Use generic implementation. */ int32_t j0; uint64_t i1, i0; @@ -78,5 +83,6 @@ __roundl (_Float128 x) SET_LDOUBLE_WORDS64 (x, i0, i1); return x; +#endif /* ! USE_ROUNDL_BUILTIN */ } libm_alias_ldouble (__round, round) |