mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-15 04:20:28 +08:00
57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/* Set current rounding direction.
|
|
Copyright (C) 2004, 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, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <fenv.h>
|
|
#include <fpu_control.h>
|
|
|
|
#include <unistd.h>
|
|
#include <ldsodefs.h>
|
|
#include <dl-procinfo.h>
|
|
#include <sysdep.h>
|
|
|
|
int
|
|
fesetround (int round)
|
|
{
|
|
if (GLRO (dl_hwcap) & HWCAP_ARM_VFP)
|
|
{
|
|
fpu_control_t temp;
|
|
|
|
switch (round)
|
|
{
|
|
case FE_TONEAREST:
|
|
case FE_UPWARD:
|
|
case FE_DOWNWARD:
|
|
case FE_TOWARDZERO:
|
|
_FPU_GETCW (temp);
|
|
temp = (temp & ~FE_TOWARDZERO) | round;
|
|
_FPU_SETCW (temp);
|
|
return 0;
|
|
default:
|
|
return 1;
|
|
}
|
|
}
|
|
else if (round == FE_TONEAREST)
|
|
/* This is the only supported rounding mode for soft-fp. */
|
|
return 0;
|
|
|
|
/* Unsupported, so fail. */
|
|
return 1;
|
|
}
|
|
|
|
libm_hidden_def (fesetround)
|