mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-02 01:40:07 +00:00
44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
/* Set the FPU control word.
|
|
Copyright (C) 1996-2014 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 <math.h>
|
|
#include <fpu_control.h>
|
|
#include <arm-features.h>
|
|
|
|
|
|
void
|
|
__setfpucw (fpu_control_t set)
|
|
{
|
|
fpu_control_t fpscr, new_fpscr;
|
|
|
|
/* Do nothing if a VFP unit isn't present. */
|
|
if (!ARM_HAVE_VFP)
|
|
return;
|
|
|
|
_FPU_GETCW (fpscr);
|
|
|
|
/* Preserve the reserved bits, and set the rest as the user
|
|
specified (or the default, if the user gave zero). */
|
|
new_fpscr = fpscr & _FPU_RESERVED;
|
|
new_fpscr |= set & ~_FPU_RESERVED;
|
|
|
|
/* Write FPSCR if changed. */
|
|
if (new_fpscr != fpscr)
|
|
_FPU_SETCW (fpscr);
|
|
}
|