mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 16:50:07 +00:00
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
|
/* Set the FPU control word.
|
||
|
|
Copyright (C) 1996, 1997, 1999, 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 <math.h>
|
||
|
|
#include <fpu_control.h>
|
||
|
|
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <ldsodefs.h>
|
||
|
|
#include <dl-procinfo.h>
|
||
|
|
#include <asm/procinfo.h>
|
||
|
|
|
||
|
|
void
|
||
|
|
__setfpucw (fpu_control_t set)
|
||
|
|
{
|
||
|
|
if (GLRO (dl_hwcap) & HWCAP_VFP)
|
||
|
|
{
|
||
|
|
fpu_control_t cw;
|
||
|
|
|
||
|
|
/* Fetch the current control word. */
|
||
|
|
_FPU_GETCW (cw);
|
||
|
|
|
||
|
|
/* Preserve the reserved bits, and set the rest as the user
|
||
|
|
specified (or the default, if the user gave zero). */
|
||
|
|
cw &= _FPU_RESERVED;
|
||
|
|
cw |= set & ~_FPU_RESERVED;
|
||
|
|
|
||
|
|
_FPU_SETCW (cw);
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Do nothing if a VFP unit isn't present. */
|
||
|
|
}
|