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/* Set current rounding direction.
Copyright (C) 2013 Imagination Technologies Ltd.
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; see the file COPYING.LIB. If
not, see <http://www.gnu.org/licenses/>. */
#include <fenv.h>
#include <unistd.h>
int
fesetround (int round)
{
unsigned int txmode;
if ((round & ~0x3) != 0)
/* ROUND is no valid rounding mode. */
return 1;
__asm__ ("MOV %0,TXMODE" : "=r" (txmode));
txmode &= ~(0x3 << 16);
/* Write rounding mode and guard bit. */
txmode |= (0x1 << 18 ) | (round << 16);
__asm__ ("MOV TXMODE,%0" : : "r" (txmode));
return 0;
}
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