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/* Install given floating-point environment.
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 <assert.h>
#include "internal.h"
libm_hidden_proto(fesetenv)
int
fesetenv (const fenv_t *envp)
{
unsigned int exc;
unsigned int txmode;
__asm__ ("MOV %0,TXMODE" : "=r" (txmode));
/* Clear rounding mode bits (round to nearest). */
txmode &= ~(0x3 << 16);
if (envp == FE_DFL_ENV)
{
exc = 0;
}
else if (envp == FE_NOMASK_ENV)
{
exc = 0x1f;
}
else
{
exc = envp->txdefr & (FE_ALL_EXCEPT | (FE_ALL_EXCEPT << 16));
/* Write rounding mode and guard bit. */
txmode |= (0x1 << 18 ) | (envp->txmode & (0x3 << 16));
}
__asm__ ("MOV TXMODE,%0" : : "r" (txmode));
metag_set_fpu_flags(exc);
/* Success. */
return 0;
}
libm_hidden_def(fesetenv)
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