1 /* Fix for missing "invalid" exceptions from floating-point 2 comparisons. s390 version. 3 Copyright (C) 2016-2021 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 */ 39