From 13c92696d2f66e94e4f04248550cc2b8f283bfd0 Mon Sep 17 00:00:00 2001 From: Joseph Myers Date: Tue, 17 Oct 2017 20:16:01 +0000 Subject: Use __f128 to define FLT128_* constants in include/float.h for old GCC. When using compilers before GCC 7, include/float.h provides fallback definitions of FLT128_* constants. These definitions use 'Q' constant suffixes, which works for configurations with _Float128 ABI-distinct from long double, but not where it has the same ABI as long double. This patch changes the definitions to use the __f128 macro from , so allowing them to work in the non-distinct _Float128 case (where they are used in building glibc tests, not for building glibc itself) as well. Tested (a) with build-many-glibcs.py with GCC 6 (installed stripped shared libraries unchanged by the patch); (b) with build-many-glibcs.py with GCC 6 together with the main patch to enable float128 aliases; (c) for x86_64 with both GCC 6 and GCC 7. * include/float.h [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_MAX): Define using __f128. [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_EPSILON): Likewise. [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_MIN): Likewise. [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_TRUE_MIN): Likewise. --- ChangeLog | 12 ++++++++++++ include/float.h | 12 ++++++++---- 2 files changed, 20 insertions(+), 4 deletions(-) diff --git a/ChangeLog b/ChangeLog index ed64155fdf..f9ca538705 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,15 @@ +2017-10-17 Joseph Myers + + * include/float.h [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && + __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_MAX): Define using + __f128. + [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE + (IEC_60559_TYPES_EXT)] (FLT128_EPSILON): Likewise. + [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE + (IEC_60559_TYPES_EXT)] (FLT128_MIN): Likewise. + [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE + (IEC_60559_TYPES_EXT)] (FLT128_TRUE_MIN): Likewise. + 2017-10-17 Adhemerval Zanella * bits/uio-ext.h (RWF_HIPRI, RWF_DSYNC, RWF_SYNC, RWF_NOWAIT): New diff --git a/include/float.h b/include/float.h index 736868fd52..939c83de4f 100644 --- a/include/float.h +++ b/include/float.h @@ -24,10 +24,14 @@ # define FLT128_MIN_10_EXP (-4931) # define FLT128_MAX_EXP 16384 # define FLT128_MAX_10_EXP 4932 -# define FLT128_MAX 1.18973149535723176508575932662800702e+4932Q -# define FLT128_EPSILON 1.92592994438723585305597794258492732e-34Q -# define FLT128_MIN 3.36210314311209350626267781732175260e-4932Q -# define FLT128_TRUE_MIN 6.47517511943802511092443895822764655e-4966Q +# define FLT128_MAX \ + __f128 (1.18973149535723176508575932662800702e+4932) +# define FLT128_EPSILON \ + __f128 (1.92592994438723585305597794258492732e-34) +# define FLT128_MIN \ + __f128 (3.36210314311209350626267781732175260e-4932) +# define FLT128_TRUE_MIN \ + __f128 (6.47517511943802511092443895822764655e-4966) #endif #endif /* _LIBC_FLOAT_H */ -- cgit v1.2.3