71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/*
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(c) Copyright 2019 Joel Sherrill <joel@rtems.org
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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1. Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <fenv.h>
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#include <errno.h>
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/*
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FUNCTION
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<<feholdexcept>>---save current floating-point environment
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INDEX
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feholdexcept
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SYNOPSIS
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#include <fenv.h>
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int feholdexcept(fenv_t *<[envp]>);
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Link with -lm.
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DESCRIPTION
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This method attempts to save the current floating-point environment
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in the fenv_t instance pointed to by <[envp]>, clear the floating
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point status flags, and then, if supported by the target architecture,
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install a "non-stop" (e.g. continue on floating point exceptions) mode
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for all floating-point exceptions.
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RETURNS
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This method will return zero if the non-stop floating-point exception
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handler was installed. Otherwise, a non-zero value is returned.
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PORTABILITY
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ANSI C requires <<feholdexcept>>.
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Not all Newlib targets have a working implementation. Refer to
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the file <<sys/fenv.h>> to see the status for your target.
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*/
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/*
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* This is a non-functional implementation that should be overridden
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* by an architecture specific implementation in newlib/libm/machine/ARCH.
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*/
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int feholdexcept(fenv_t *envp)
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{
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return -ENOTSUP;
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}
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