1  /* Fix for missing "invalid" exceptions from floating-point
       2     comparisons.  s390 version.
       3     Copyright (C) 2016-2023 Free Software Foundation, Inc.
       4     This file is part of the GNU C Library.
       5  
       6     The GNU C Library is free software; you can redistribute it and/or
       7     modify it under the terms of the GNU Lesser General Public
       8     License as published by the Free Software Foundation; either
       9     version 2.1 of the License, or (at your option) any later version.
      10  
      11     The GNU C Library is distributed in the hope that it will be useful,
      12     but WITHOUT ANY WARRANTY; without even the implied warranty of
      13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14     Lesser General Public License for more details.
      15  
      16     You should have received a copy of the GNU Lesser General Public
      17     License along with the GNU C Library; if not, see
      18     <https://www.gnu.org/licenses/>.  */
      19  
      20  #ifndef FIX_FP_INT_COMPARE_INVALID_H
      21  #define FIX_FP_INT_COMPARE_INVALID_H	1
      22  
      23  /* GCC uses unordered comparison instructions like cebr (Short BFP COMPARE)
      24     when it should use ordered comparison instructions like kebr
      25     (Short BFP COMPARE AND SIGNAL) in order to raise invalid exceptions if
      26     any operand is quiet (or signaling) NAN. See gcc bugzilla:
      27     <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77918>.
      28     There exists an equivalent gcc bugzilla for Intel:
      29     <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52451>.
      30     This s390 gcc bug is fixed with gcc 10, thus we don't need the workaround
      31     to call feraiseexcept (FE_INVALID) in math/s_iseqsig_template.c.  */
      32  #if __GNUC_PREREQ (10, 0)
      33  # define FIX_COMPARE_INVALID 0
      34  #else
      35  # define FIX_COMPARE_INVALID 1
      36  #endif
      37  
      38  #endif /* fix-fp-int-compare-invalid.h */