Use GCC builtins for round functions if desired.
commitf82996f8159981619ac7ed8a4c1838c2ad72ab61
authorStefan Liebler <stli@linux.ibm.com>
Wed, 11 Dec 2019 14:09:24 +0000 (11 15:09 +0100)
committerStefan Liebler <stli@linux.ibm.com>
Wed, 11 Dec 2019 14:12:18 +0000 (11 15:12 +0100)
tree684c4c0fad4471c925d49b8772d60e35e9ca5de6
parent1ac9c1cf87216bf9f8ac4f7c9754d025d9f2c4ae
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>
sysdeps/generic/math-use-builtins.h
sysdeps/ieee754/dbl-64/s_round.c
sysdeps/ieee754/float128/float128_private.h
sysdeps/ieee754/flt-32/s_roundf.c
sysdeps/ieee754/ldbl-128/s_roundl.c
sysdeps/s390/fpu/math-use-builtins.h