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| author | Joseph Myers <joseph@codesourcery.com> | 2019-08-13 23:04:38 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2019-08-13 23:04:38 +0000 |
| commit | c3ce62cc0bd6e8a33629e2aabb7783a322e9189c (patch) | |
| tree | cbad12f52e7a0d589b2b1628a39e5c8a7e0ac756 /math | |
| parent | 5a3afa9738f3dbbaf8c0a35665318c1af782111b (diff) | |
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Declare some TS 18661-4 interfaces for C2X.
C2X (current version in git, postdating the most recent public draft
available as a PDF on the WG14 website) adds the interfaces from TS
18661-4, other than the reduction functions, as unconditionally
required and visible in <math.h> for hosted implementations; the
__STDC_WANT_IEC_60559_FUNCS_EXT__ macro is not included in C2X at all
(as the reduction functions aren't included at all, expected to end up
in a version of the TS updated to be relative to C2X).
This patch updates the glibc headers accordingly, following the same
pattern used for 18661-1 functions. As the only 18661-4 functions
currently supported are the exp10 functions that have been in glibc
for a very long time, this means that in fact __GLIBC_USE
(IEC_60559_FUNCS_EXT) ends up being used only to determine the
definition of __GLIBC_USE_IEC_60559_FUNCS_EXT_C2X, not yet in any
headers other than bits/libc-header-start.h.
(I hope to add the other 18661-4 functions to glibc at some point; the
main complication is the current lack of MPFR support for many of
these functions.)
Tested for x86_64.
* bits/libc-header-start.h (__GLIBC_USE_IEC_60559_FUNCS_EXT):
Update comment.
(__GLIBC_USE_IEC_60559_FUNCS_EXT_C2X): New macro.
* bits/math-finite.h [__GLIBC_USE (IEC_60559_FUNCS_EXT)]: Change
to [__GLIBC_USE (IEC_60559_FUNCS_EXT_C2X)].
* math/bits/mathcalls.h [__GLIBC_USE (IEC_60559_FUNCS_EXT)]:
Likewise.
Diffstat (limited to 'math')
| -rw-r--r-- | math/bits/mathcalls.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h index 3d1dc07d98..47808a2915 100644 --- a/math/bits/mathcalls.h +++ b/math/bits/mathcalls.h @@ -109,7 +109,7 @@ __MATHCALL (log10,, (_Mdouble_ __x)); /* Break VALUE into integral and fractional parts. */ __MATHCALL (modf,, (_Mdouble_ __x, _Mdouble_ *__iptr)) __nonnull ((2)); -#if __GLIBC_USE (IEC_60559_FUNCS_EXT) +#if __GLIBC_USE (IEC_60559_FUNCS_EXT_C2X) /* Compute exponent to base ten. */ __MATHCALL (exp10,, (_Mdouble_ __x)); #endif |