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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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