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authorJoseph Myers <joseph@codesourcery.com>2017-10-17 20:16:01 +0000
committerJoseph Myers <joseph@codesourcery.com>2017-10-17 20:16:01 +0000
commit13c92696d2f66e94e4f04248550cc2b8f283bfd0 (patch)
treeed78614959cadafa22818b78bc27150d1001eeb6 /include
parent71d85045fdaefbd2dc1708ed6123ebdb880cb3ed (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.h12
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 */