[thirdparty/glibc.git] / sysdeps / s390 / fpu / fix-fp-int-compare-invalid.h

/* Fix for missing "invalid" exceptions from floating-point
   comparisons.  s390 version.
   Copyright (C) 2016-2019 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   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
   <https://www.gnu.org/licenses/>.  */

#ifndef FIX_FP_INT_COMPARE_INVALID_H
#define FIX_FP_INT_COMPARE_INVALID_H	1

/* GCC uses unordered comparison instructions like cebr (Short BFP COMPARE)
   when it should use ordered comparison instructions like kebr
   (Short BFP COMPARE AND SIGNAL) in order to raise invalid exceptions if
   any operand is quiet (or signaling) NAN. See gcc bugzilla:
   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77918>.
   There exists an equivalent gcc bugzilla for Intel:
   <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52451>.
   Once the s390 gcc bug is fixed, the definition of FIX_COMPARE_INVALID
   should have a __GNUC_PREREQ conditional added so that e.g. the workaround
   to call feraiseexcept (FE_INVALID) in math/s_iseqsig_template.c can be
   avoided.  */
#define FIX_COMPARE_INVALID 1

#endif /* fix-fp-int-compare-invalid.h */
Commit	Line	Data
8e36adc0 SL	1	/* Fix for missing "invalid" exceptions from floating-point
8e36adc0 SL	2	comparisons. s390 version.
04277e02	3	Copyright (C) 2016-2019 Free Software Foundation, Inc.
8e36adc0 SL	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
5a82c748	18	<https://www.gnu.org/licenses/>. */
8e36adc0 SL	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	Once the s390 gcc bug is fixed, the definition of FIX_COMPARE_INVALID
	31	should have a __GNUC_PREREQ conditional added so that e.g. the workaround
	32	to call feraiseexcept (FE_INVALID) in math/s_iseqsig_template.c can be
	33	avoided. */
	34	#define FIX_COMPARE_INVALID 1
	35
	36	#endif /* fix-fp-int-compare-invalid.h */