cd42798aef
Continuing the fixes for C90 libm functions calling C99 fe* functions, this patch fixes the case of fesetenv by making it a weak alias of __fesetenv and making the affected code (including various copies of feupdateenv which also gets called from C90 functions) call __fesetenv. Tested for x86_64 (testsuite, and that disassembly of installed shared libraries is unchanged by the patch). Also tested for ARM (soft-float) that fesetenv failures disappear from the linknamespace test results (fsetround and feupdateenv remain to be addressed to complete fixing bug 17748). [BZ #17748] * include/fenv.h (__fesetenv): Use libm_hidden_proto. * math/fesetenv.c (__fesetenv): Use libm_hidden_def. * sysdeps/aarch64/fpu/fesetenv.c (fesetenv): Rename to __fesetenv and define as weak alias of __fesetenv. Use libm_hidden_weak. * sysdeps/alpha/fpu/fesetenv.c (__fesetenv): Use libm_hidden_def. * sysdeps/arm/fesetenv.c (fesetenv): Rename to __fesetenv and define as weak alias of __fesetenv. Use libm_hidden_weak. * sysdeps/hppa/fpu/fesetenv.c (fesetenv): Likewise. * sysdeps/i386/fpu/fesetenv.c (__fesetenv): Use libm_hidden_def. * sysdeps/ia64/fpu/fesetenv.c (fesetenv): Rename to __fesetenv and define as weak alias of __fesetenv. Use libm_hidden_weak. * sysdeps/m68k/fpu/fesetenv.c (__fesetenv): Use libm_hidden_def. * sysdeps/mips/fpu/fesetenv.c (fesetenv): Rename to __fesetenv and define as weak alias of __fesetenv. Use libm_hidden_weak. * sysdeps/powerpc/fpu/fesetenv.c (__fesetenv): Use libm_hidden_def. * sysdeps/powerpc/nofpu/fesetenv.c (__fesetenv): Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/fesetenv.c (__fesetenv): Likewise. * sysdeps/s390/fpu/fesetenv.c (fesetenv): Rename to __fesetenv and define as weak alias of __fesetenv. Use libm_hidden_weak. * sysdeps/sh/sh4/fpu/fesetenv.c (fesetenv): Likewise. * sysdeps/sparc/fpu/fesetenv.c (__fesetenv): Use libm_hidden_def. * sysdeps/tile/math_private.h (__fesetenv): New inline function. * sysdeps/x86_64/fpu/fesetenv.c (fesetenv): Rename to __fesetenv and define as weak alias of __fesetenv. Use libm_hidden_weak. * sysdeps/generic/math_private.h (default_libc_fesetenv): Use __fesetenv instead of fesetenv. (libc_feresetround_noex_ctx): Likewise. * sysdeps/alpha/fpu/feupdateenv.c (__feupdateenv): Likewise. * sysdeps/hppa/fpu/feupdateenv.c (feupdateenv): Likewise. * sysdeps/i386/fpu/feupdateenv.c (__feupdateenv): Likewise. * sysdeps/ia64/fpu/feupdateenv.c (feupdateenv): Likewise. * sysdeps/m68k/fpu/feupdateenv.c (__feupdateenv): Likewise. * sysdeps/mips/fpu/feupdateenv.c (feupdateenv): Likewise. * sysdeps/powerpc/nofpu/feupdateenv.c (__feupdateenv): Likewise. * sysdeps/powerpc/powerpc32/e500/nofpu/feupdateenv.c (__feupdateenv): Likewise. * sysdeps/s390/fpu/feupdateenv.c (feupdateenv): Likewise. * sysdeps/sh/sh4/fpu/feupdateenv.c (feupdateenv): Likewise. * sysdeps/sparc/fpu/feupdateenv.c (__feupdateenv): Likewise. * sysdeps/x86_64/fpu/feupdateenv.c (__feupdateenv): Likewise.
66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/* Install given floating-point environment.
|
|
Copyright (C) 1997-2015 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by David Huggins-Daines <dhd@debian.org>, 2000
|
|
Based on the m68k version by
|
|
Andreas Schwab <schwab@suse.de>
|
|
|
|
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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <fenv.h>
|
|
|
|
int
|
|
__fesetenv (const fenv_t *envp)
|
|
{
|
|
union { unsigned long long buf[4]; fenv_t env; } temp;
|
|
unsigned long long *bufptr;
|
|
|
|
/* Install the environment specified by ENVP. But there are a few
|
|
values which we do not want to come from the saved environment.
|
|
Therefore, we get the current environment and replace the values
|
|
we want to use from the environment specified by the parameter. */
|
|
bufptr = temp.buf;
|
|
__asm__ (
|
|
"fstd,ma %%fr0,8(%1)\n"
|
|
: "=m" (temp) : "r" (bufptr) : "%r0");
|
|
|
|
temp.env.__status_word &= ~(FE_ALL_EXCEPT
|
|
| (FE_ALL_EXCEPT << 27)
|
|
| FE_DOWNWARD);
|
|
if (envp == FE_DFL_ENV)
|
|
temp.env.__status_word = 0;
|
|
else if (envp == FE_NOMASK_ENV)
|
|
temp.env.__status_word |= FE_ALL_EXCEPT;
|
|
else
|
|
temp.env.__status_word |= (envp->__status_word
|
|
& (FE_ALL_EXCEPT
|
|
| FE_DOWNWARD
|
|
| (FE_ALL_EXCEPT << 27)));
|
|
|
|
/* Load the new environment. We use bufptr again since the
|
|
initial asm has modified the value of the register and here
|
|
we take advantage of that to load in reverse order so fr0
|
|
is loaded last and T-Bit is enabled. */
|
|
__asm__ (
|
|
"fldd,mb -8(%1),%%fr0\n"
|
|
: : "m" (temp), "r" (bufptr) : "%r0" );
|
|
|
|
/* Success. */
|
|
return 0;
|
|
}
|
|
libm_hidden_def (__fesetenv)
|
|
weak_alias (__fesetenv, fesetenv)
|
|
libm_hidden_weak (fesetenv)
|