mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 02:03:35 +08:00
be668a8d78
This patch changes the exp10f error handling semantics to only set
errno according to POSIX rules. New symbol version is introduced at
GLIBC_2.32. The old wrappers are kept for compat symbols.
There are some outliers that need special handling:
- ia64 provides an optimized implementation of exp10f that uses ia64
specific routines to set SVID compatibility. The new symbol version
is aliased to the exp10f one.
- m68k also provides an optimized implementation, and the new version
uses it instead of the sysdeps/ieee754/flt32 one.
- riscv and csky uses the generic template implementation that
does not provide SVID support. For both cases a new exp10f
version is not added, but rather the symbols version of the
generic sysdeps/ieee754/flt32 is adjusted instead.
Checked on aarch64-linux-gnu, x86_64-linux-gnu, i686-linux-gnu,
powerpc64le-linux-gnu.
47 lines
1.5 KiB
C
47 lines
1.5 KiB
C
/* Copyright (C) 2011-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
|
|
/*
|
|
* wrapper exp10f(x)
|
|
*/
|
|
|
|
#include <math.h>
|
|
#include <math_private.h>
|
|
#include <math-svid-compat.h>
|
|
#include <libm-alias-float.h>
|
|
|
|
#if LIBM_SVID_COMPAT
|
|
float
|
|
__exp10f_compat (float x)
|
|
{
|
|
float z = __exp10f (x);
|
|
if (__builtin_expect (!isfinite (z) || z == 0, 0)
|
|
&& isfinite (x) && _LIB_VERSION != _IEEE_)
|
|
/* exp10f overflow (146) if x > 0, underflow (147) if x < 0. */
|
|
return __kernel_standard_f (x, x, 146 + !!signbit (x));
|
|
|
|
return z;
|
|
}
|
|
compat_symbol (libm, __exp10f_compat, exp10f, GLIBC_2_1);
|
|
# if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_27)
|
|
strong_alias (__exp10f_compat, __pow10f)
|
|
compat_symbol (libm, __pow10f, pow10f, GLIBC_2_1);
|
|
# endif
|
|
#endif
|