libgcc/config/ia64/sfp-exceptions.c

   1 /*
   2  * Copyright (C) 2012-2018 Free Software Foundation, Inc.
   3  *
   4  * This file is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 3, or (at your option) any
   7  * later version.
   8  *
   9  * This file is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * Under Section 7 of GPL version 3, you are granted additional
  15  * permissions described in the GCC Runtime Library Exception, version
  16  * 3.1, as published by the Free Software Foundation.
  17  *
  18  * You should have received a copy of the GNU General Public License and
  19  * a copy of the GCC Runtime Library Exception along with this program;
  20  * see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  21  * <http://www.gnu.org/licenses/>.
  22  */
  23
  24 #include "sfp-machine.h"
  25
  26 void
  27 __sfp_handle_exceptions (int _fex)
  28 {
  29   double d;
  30
  31   if (_fex & FP_EX_INVALID)
  32     {
  33       asm volatile ("frcpa.s0 %0, p1 = f0, f0" : "=f" (d) : : "p1");
  34     }
  35   if (_fex & FP_EX_DIVZERO)
  36     {
  37       asm volatile ("frcpa.s0 %0, p1 = f1, f0" : "=f" (d) : : "p1");
  38     }
  39   if (_fex & FP_EX_OVERFLOW)
  40     {
  41       d = __DBL_MAX__;
  42       asm volatile ("fadd.d.s0 %0 = %0, %0" : "+f" (d));
  43     }
  44   if (_fex & FP_EX_UNDERFLOW)
  45     {
  46       d = __DBL_MIN__;
  47       asm volatile ("fnma.d.s0 %0 = %0, %0, f0" : "+f" (d));
  48     }
  49   if (_fex & FP_EX_INEXACT)
  50     {
  51       d = __DBL_MAX__;
  52       asm volatile ("fsub.d.s0 %0 = %0, f1" : "+f" (d));
  53     }
  54 }