mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-01 17:30:07 +00:00
39 lines
1.3 KiB
C
39 lines
1.3 KiB
C
|
/* Set current rounding direction.
|
||
|
|
Copyright (C) 1997 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Library General Public License as
|
||
|
|
published by the Free Software Foundation; either version 2 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
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public
|
||
|
|
License along with the GNU C Library; see the file COPYING.LIB. 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)
|
||
|
|
{
|
||
|
|
fexcept_t fpcr;
|
||
|
|
|
||
|
|
if (round & ~FE_UPWARD)
|
||
|
|
/* ROUND is no valid rounding mode. */
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
__asm__ ("fmove%.l %!,%0" : "=dm" (fpcr));
|
||
|
|
fpcr &= ~FE_UPWARD;
|
||
|
|
fpcr |= round;
|
||
|
|
__asm__ __volatile__ ("fmove%.l %0,%!" : : "dm" (fpcr));
|
||
|
|
|
||
|
|
return 1;
|
||
|
|
}
|