mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 01:00:07 +00:00
01238691bb
Continuing the fixes for C90 libm functions calling C99 fe* functions, this patch fixes the case of fesetround by making it a weak alias of __fesetround and making the affected code call __fesetround. An existing __fesetround function in fenv_libc.h for powerpc is renamed to __fesetround_inline. Tested for x86_64 (testsuite, and that disassembly of installed shared libraries is unchanged by the patch). Also tested for ARM (soft-float) that fesetround failures disappear from the linknamespace test results (feupdateenv remains to be addressed to complete fixing bug 17748). [BZ #17748] * include/fenv.h (__fesetround): Declare. Use libm_hidden_proto. * math/fesetround.c (fesetround): Rename to __fesetround and define as weak alias of __fesetround. Use libm_hidden_weak. * sysdeps/aarch64/fpu/fesetround.c (fesetround): Likewise. * sysdeps/alpha/fpu/fesetround.c (fesetround): Likewise. * sysdeps/arm/fesetround.c (fesetround): Likewise. * sysdeps/hppa/fpu/fesetround.c (fesetround): Likewise. * sysdeps/i386/fpu/fesetround.c (fesetround): Likewise. * sysdeps/ia64/fpu/fesetround.c (fesetround): Likewise. * sysdeps/m68k/fpu/fesetround.c (fesetround): Likewise. * sysdeps/mips/fpu/fesetround.c (fesetround): Likewise. * sysdeps/powerpc/fpu/fenv_libc.h (__fesetround): Rename to __fesetround_inline. * sysdeps/powerpc/fpu/fenv_private.h (libc_fesetround_ppc): Call __fesetround_inline instead of __fesetround. * sysdeps/powerpc/fpu/fesetround.c (fesetround): Rename to __fesetround and define as weak alias of __fesetround. Use libm_hidden_weak. Call __fesetround_inline instead of __fesetround. * sysdeps/powerpc/nofpu/fesetround.c (fesetround): Rename to __fesetround and define as weak alias of __fesetround. Use libm_hidden_weak. * sysdeps/powerpc/powerpc32/e500/nofpu/fesetround.c (fesetround): Likewise. * sysdeps/s390/fpu/fesetround.c (fesetround): Likewise. * sysdeps/sh/sh4/fpu/fesetround.c (fesetround): Likewise. * sysdeps/sparc/fpu/fesetround.c (fesetround): Likewise. * sysdeps/tile/math_private.h (__fesetround): New inline function. * sysdeps/x86_64/fpu/fesetround.c (fesetround): Rename to __fesetround and define as weak alias of __fesetround. Use libm_hidden_weak. * sysdeps/generic/math_private.h (default_libc_fesetround): Call __fesetround instead of fesetround. (default_libc_feholdexcept_setround): Likewise. (libc_feholdsetround_ctx): Likewise. (libc_feholdsetround_noex_ctx): Likewise.
49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/* Set current rounding direction.
|
|
Copyright (C) 2001-2015 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
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
|
|
__fesetround (int round)
|
|
{
|
|
unsigned short int cw;
|
|
int mxcsr;
|
|
|
|
if ((round & ~0xc00) != 0)
|
|
/* ROUND is no valid rounding mode. */
|
|
return 1;
|
|
|
|
/* First set the x87 FPU. */
|
|
asm ("fnstcw %0" : "=m" (*&cw));
|
|
cw &= ~0xc00;
|
|
cw |= round;
|
|
asm ("fldcw %0" : : "m" (*&cw));
|
|
|
|
/* And now the MSCSR register for SSE, the precision is at different bit
|
|
positions in the different units, we need to shift it 3 bits. */
|
|
asm ("stmxcsr %0" : "=m" (*&mxcsr));
|
|
mxcsr &= ~ 0x6000;
|
|
mxcsr |= round << 3;
|
|
asm ("ldmxcsr %0" : : "m" (*&mxcsr));
|
|
|
|
return 0;
|
|
}
|
|
libm_hidden_def (__fesetround)
|
|
weak_alias (__fesetround, fesetround)
|
|
libm_hidden_weak (fesetround)
|