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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. * 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.
31 lines
937 B
C
31 lines
937 B
C
#ifndef _LIBC_FLOAT_H
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#define _LIBC_FLOAT_H
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#ifndef _ISOMAC
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# define __STDC_WANT_IEC_60559_TYPES_EXT__
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#endif
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#include_next <float.h>
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/* Supplement float.h macros for _Float128 for older compilers
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which do not yet support the type. These are described in
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TS 18661-3. */
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#include <features.h>
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#include <bits/floatn.h>
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#if !__GNUC_PREREQ (7, 0) \
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&& __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)
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# define FLT128_MANT_DIG 113
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# define FLT128_DECIMAL_DIG 36
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# define FLT128_DIG 33
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# define FLT128_MIN_EXP (-16381)
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# define FLT128_MIN_10_EXP (-4931)
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# define FLT128_MAX_EXP 16384
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# define FLT128_MAX_10_EXP 4932
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# define FLT128_MAX 1.18973149535723176508575932662800702e+4932Q
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# define FLT128_EPSILON 1.92592994438723585305597794258492732e-34Q
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# define FLT128_MIN 3.36210314311209350626267781732175260e-4932Q
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# define FLT128_TRUE_MIN 6.47517511943802511092443895822764655e-4966Q
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#endif
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#endif /* _LIBC_FLOAT_H */
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