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5220a1aa8d
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.
99 lines
3.7 KiB
C
99 lines
3.7 KiB
C
/* Configuration for math tests. Generic version.
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Copyright (C) 2013-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* Indicate whether to run tests involving sNaN values for the float, double,
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and long double C data types, respectively. All are run unless
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overridden. */
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#ifndef SNAN_TESTS_float
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# define SNAN_TESTS_float 1
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#endif
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#ifndef SNAN_TESTS_double
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# define SNAN_TESTS_double 1
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#endif
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#ifndef SNAN_TESTS_long_double
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# define SNAN_TESTS_long_double 1
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#endif
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/* Return nonzero value if to run tests involving sNaN values for X. */
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#define SNAN_TESTS(x) \
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(sizeof (x) == sizeof (float) ? SNAN_TESTS_float \
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: sizeof (x) == sizeof (double) ? SNAN_TESTS_double \
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: SNAN_TESTS_long_double)
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/* Indicate whether to run tests involving type casts of sNaN values. These
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are run unless overridden. */
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#ifndef SNAN_TESTS_TYPE_CAST
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# define SNAN_TESTS_TYPE_CAST 1
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#endif
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/* Indicate whether to run tests involving a given rounding mode for a
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given floating-point type, given that fesetround succeeds for that
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mode. All are run if fesetround succeeds unless overridden. */
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#ifndef ROUNDING_TESTS_float
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# define ROUNDING_TESTS_float(MODE) 1
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#endif
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#ifndef ROUNDING_TESTS_double
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# define ROUNDING_TESTS_double(MODE) 1
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#endif
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#ifndef ROUNDING_TESTS_long_double
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# define ROUNDING_TESTS_long_double(MODE) 1
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#endif
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#define ROUNDING_TESTS(TYPE, MODE) \
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(sizeof (TYPE) == sizeof (float) ? ROUNDING_TESTS_float (MODE) \
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: sizeof (TYPE) == sizeof (double) ? ROUNDING_TESTS_double (MODE) \
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: ROUNDING_TESTS_long_double (MODE))
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/* Indicate whether to run tests of floating-point exceptions for a
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given floating-point type, given that the exception macros are
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defined. All are run unless overridden. */
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#ifndef EXCEPTION_TESTS_float
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# define EXCEPTION_TESTS_float 1
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#endif
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#ifndef EXCEPTION_TESTS_double
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# define EXCEPTION_TESTS_double 1
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#endif
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#ifndef EXCEPTION_TESTS_long_double
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# define EXCEPTION_TESTS_long_double 1
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#endif
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#define EXCEPTION_TESTS(TYPE) \
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(sizeof (TYPE) == sizeof (float) ? EXCEPTION_TESTS_float \
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: sizeof (TYPE) == sizeof (double) ? EXCEPTION_TESTS_double \
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: EXCEPTION_TESTS_long_double)
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/* Indicate whether the given exception trap(s) can be enabled
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in feenableexcept. If non-zero, the traps are always supported.
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If zero, traps may or may not be supported depending on the
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target (this can be determined by checking the return value
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of feenableexcept). This enables skipping of tests which use
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traps. By default traps are supported unless overridden. */
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#ifndef EXCEPTION_ENABLE_SUPPORTED
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# define EXCEPTION_ENABLE_SUPPORTED(EXCEPT) \
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(EXCEPTION_TESTS_float || EXCEPTION_TESTS_double)
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#endif
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/* Indicate whether exception traps, if enabled, occur whenever an
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exception flag is set explicitly, so it is not possible to set flag
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bits with traps enabled without causing traps to be taken. If
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traps cannot be enabled, the value of this macro does not
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matter. */
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#ifndef EXCEPTION_SET_FORCES_TRAP
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# define EXCEPTION_SET_FORCES_TRAP 0
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#endif
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