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| author | Joseph Myers <joseph@codesourcery.com> | 2017-10-17 20:16:01 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2017-10-17 20:16:01 +0000 |
| commit | 13c92696d2f66e94e4f04248550cc2b8f283bfd0 (patch) | |
| tree | ed78614959cadafa22818b78bc27150d1001eeb6 /include | |
| parent | 71d85045fdaefbd2dc1708ed6123ebdb880cb3ed (diff) | |
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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
<bits/floatn.h>, 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.
Diffstat (limited to 'include')
| -rw-r--r-- | include/float.h | 12 |
1 files changed, 8 insertions, 4 deletions
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 */ |