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glibc/sysdeps/powerpc/math-tests.h

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New <math.h> macro named issignaling to check for a signaling NaN (sNaN). It is based on draft TS 18661 and currently enabled as a GNU extension.
2013-04-02 11:51:02 +00:00
/* Configuration for math tests. PowerPC version.
Update copyright dates with scripts/update-copyrights.
2017-01-01 00:14:16 +00:00
Copyright (C) 2013-2017 Free Software Foundation, Inc.
New <math.h> macro named issignaling to check for a signaling NaN (sNaN). It is based on draft TS 18661 and currently enabled as a GNU extension.
2013-04-02 11:51:02 +00:00
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
<http://www.gnu.org/licenses/>. */
/* On PowerPC, in versions of GCC up to at least 4.7.2, a type cast -- which is
a IEEE 754-2008 general-computational convertFormat operation (IEEE
754-2008, 5.4.2) -- does not turn a sNaN into a qNaN (whilst raising an
INVALID exception), which is contrary to IEEE 754-2008 5.1 and 7.2. This
Refer to two GCC PRs.
2013-04-03 12:13:44 +00:00
renders certain tests infeasible in this scenario.
<http://gcc.gnu.org/PR56828>. */
New <math.h> macro named issignaling to check for a signaling NaN (sNaN). It is based on draft TS 18661 and currently enabled as a GNU extension.
2013-04-02 11:51:02 +00:00
#define SNAN_TESTS_TYPE_CAST 0
Add tests for fegetexceptflag, fesetexceptflag. I noticed that there was no meaningful test coverage for fegetexceptflag and fesetexceptflag (one test ensures that calls to them compile and link, but nothing to verify they work correctly). This patch adds tests for these functions. fesetexceptflag is meant to set the relevant exception flag bits to the saved state without causing enabled traps to be taken. On some architectures, it is not possible to set exception flag bits without causing enabled traps to occur. Such architectures need to define EXCEPTION_SET_FORCES_TRAP to 1 in their math-tests.h, as is done in this patch for powerpc. x86 avoids needing to define this because the traps resulting from setting exception bits don't occur until the next floating-point operation or fwait instruction. Tested for x86_64, x86 and powerpc. Note that test-fexcept fails for powerpc because of a pre-existing bug in fesetexceptflag for powerpc, which I'll fix separately. * math/test-fexcept-traps.c: New file. * math/test-fexcept.c: Likewise. * math/Makefile (tests): Add test-fexcept and test-fexcept-traps. * sysdeps/generic/math-tests.h (EXCEPTION_SET_FORCES_TRAP): New macro. * sysdeps/powerpc/math-tests.h [!__NO_FPRS__] (EXCEPTION_SET_FORCES_TRAP): Likewise.
2016-08-10 21:01:08 +00:00
#ifndef __NO_FPRS__
/* Setting exception flags in FPSCR results in enabled traps for those
exceptions being taken. */
# define EXCEPTION_SET_FORCES_TRAP 1
#endif
New <math.h> macro named issignaling to check for a signaling NaN (sNaN). It is based on draft TS 18661 and currently enabled as a GNU extension.
2013-04-02 11:51:02 +00:00
#include_next <math-tests.h>
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