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/*
* Copyright (C) 2016-2017 Andes Technology, Inc.
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
/* Raise given exceptions.
Copyright (C) 2004-2013 Free Software Foundation, Inc.
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 <fpu_control.h>
#include <fenv.h>
#include <float.h>
#include "fenv_libc.h"
int
feraiseexcept (int excepts)
{
#ifdef __NDS32_ABI_2FP_PLUS__
float temp1 = 0.0, temp2 = 1.0;
if (FE_INVALID & excepts)
{
__asm__ volatile(
"fmtsr\t %0, $fs0\n\t"
"fdivs\t $fs0, $fs0, $fs0\n\t"
:
:"r"(temp1)
:"$fs0"
);
}
if (FE_DIVBYZERO & excepts)
{
__asm__ volatile(
"fmtsr\t %0, $fs0\n\t"
"fmtsr\t %1, $fs1\n\t"
"fdivs\t $fs0, $fs1, $fs0\n\t"
:
:"r"(temp1),"r"(temp2)
:"$fs0"
);
}
if (FE_OVERFLOW & excepts)
{
/* There's no way to raise overflow without also raising inexact.
*/
unsigned int fpcsr;
temp1 = FLT_MAX;
__asm__ volatile(
"fmfcsr\t %0\n\t"
"fmtsr\t %1, $fs0\n\t"
"fadds\t $fs0, $fs0, $fs0\n\t"
"ori\t %0,%0,0x10\n\t"
"fmtcsr\t %0\n\t"
:"=&r"(fpcsr)
:"r"(temp1)
:"$fs0"
);
}
if (FE_UNDERFLOW & excepts)
{
/* There's no way to raise overflow without also raising inexact.
*/
temp1 = FLT_MIN;
temp2 = 2.0;
__asm__ volatile(
"fmtsr\t %0, $fs0\n\t"
"fmtsr\t %1, $fs1\n\t"
"fdivs\t $fs1, $fs0, $fs1\n\t"
:
:"r"(temp1),"r"(temp2)
:"$fs0","$fs1"
);
}
if (FE_INEXACT & excepts)
{
temp1 = 3.0;
__asm__ volatile(
"fmtsr\t %0, $fs1\n\t"
"fmtsr\t %1, $fs0\n\t"
"fdivs\t $fs1, $fs0, $fs1\n\t"
:
:"r"(temp1),"r"(temp2)
:"$fs0","$fs1"
);
}
return 0;
#endif
/* Unsupported, so fail unless nothing needs to be done. */
return (excepts != 0);
}
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