mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-05 03:01:05 +00:00
9b8a727776
feholdexcept. * sysdeps/alpha/fpu/feholdexcpt.c: Add libm_hidden_def. * sysdeps/alpha/fpu/fesetround.c: Likewise. * sysdeps/generic/feholdexcpt.c: Likewise. * sysdeps/generic/fesetround.c: Likewise. * sysdeps/i386/fpu/feholdexcpt.c: Likewise. * sysdeps/i386/fpu/fesetround.c: Likewise. * sysdeps/ia64/fpu/feholdexcpt.c: Likewise. * sysdeps/ia64/fpu/fesetround.c: Likewise. * sysdeps/powerpc/fpu/feholdexcpt.c: Likewise. * sysdeps/powerpc/fpu/fesetround.c: Likewise. * sysdeps/s390/fpu/feholdexcpt.c: Likewise. * sysdeps/s390/fpu/fesetround.c: Likewise. * sysdeps/sh/sh4/fpu/feholdexcpt.c: Likewise. * sysdeps/sh/sh4/fpu/fesetround.c: Likewise. * sysdeps/sparc/fpu/feholdexcpt.c: Likewise. * sysdeps/sparc/fpu/fesetround.c: Likewise. * sysdeps/x86_64/fpu/feholdexcpt.c: Likewise. * sysdeps/x86_64/fpu/fesetround.c: Likewise. * sysdeps/generic/s_significand.c (__significand): Use __ilogb not ilogb. * sysdeps/generic/s_significandf.c (__significandf): Use __ilogbf not ilogbf.
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/* Set current rounding direction.
|
|
Copyright (C) 2001, 2005 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#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)
|