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[PATCH v2 8/9] Allow macros prefixed with FLT128 in include/float.h
- From: "Gabriel F. T. Gomes" <gftg at linux dot vnet dot ibm dot com>
- To: libc-alpha at sourceware dot org
- Date: Fri, 2 Jun 2017 20:27:30 -0300
- Subject: [PATCH v2 8/9] Allow macros prefixed with FLT128 in include/float.h
- Authentication-results: sourceware.org; auth=none
- References: <1496446051-16852-1-git-send-email-gftg@linux.vnet.ibm.com>
Changes since v1:
- This patch is new in this series.
-- 8< --
TS 18661-3 specifies that macros prefixed with FLTN_ can be defined in
float.h, only if __STDC_WANT_IEC_60559_TYPES_EXT__ is defined as a macro
before the inclusion of float.h. Since GCC 7.0, these macros are provided
under this condition, however, for older versions of GCC, these macros are
not provided at all. This patch allows the definitions of such macros in
include/float.h for older compilers, if the condition above is met, and
even if _ISOMAC is defined.
2017-06-01 Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com>
* include/float.h: Allow the definition of macros prefixed with
FLT128 even if _ISOMAC is defined, but provided that
__STDC_WANT_IEC_60559_TYPES_EXT__ is defined as a macro.
---
include/float.h | 31 +++++++++++++++----------------
1 file changed, 15 insertions(+), 16 deletions(-)
diff --git a/include/float.h b/include/float.h
index 20c4acb..a5b357d 100644
--- a/include/float.h
+++ b/include/float.h
@@ -10,22 +10,21 @@
/* Supplement float.h macros for _Float128 for older compilers
which do not yet support the type. These are described in
TS 18661-3. */
-#ifndef _ISOMAC
-# include <features.h>
-# include <bits/floatn.h>
-# if !__GNUC_PREREQ (7, 0) && __HAVE_DISTINCT_FLOAT128
-# define FLT128_MANT_DIG 113
-# define FLT128_DECIMAL_DIG 36
-# define FLT128_DIG 33
-# define FLT128_MIN_EXP (-16381)
-# 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
-# endif
+#include <features.h>
+#include <bits/floatn.h>
+#if !__GNUC_PREREQ (7, 0) \
+ && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
+# define FLT128_MANT_DIG 113
+# define FLT128_DECIMAL_DIG 36
+# define FLT128_DIG 33
+# define FLT128_MIN_EXP (-16381)
+# 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
#endif
#endif /* _LIBC_FLOAT_H */
--
2.4.11