71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
|
/*
|
||
|
|
(c) Copyright 2017 Michael R. Neilly
|
||
|
|
All rights reserved.
|
||
|
|
|
||
|
|
Redistribution and use in source and binary forms, with or without
|
||
|
|
modification, are permitted provided that the following conditions
|
||
|
|
are met:
|
||
|
|
|
||
|
|
* Redistributions of source code must retain the above copyright
|
||
|
|
notice, this list of conditions and the following disclaimer.
|
||
|
|
|
||
|
|
* Redistributions in binary form must reproduce the above copyright
|
||
|
|
notice, this list of conditions and the following disclaimer in the
|
||
|
|
documentation and/or other materials provided with the distribution.
|
||
|
|
|
||
|
|
* Neither the names of the copyright holders nor the names of their
|
||
|
|
contributors may be used to endorse or promote products derived from
|
||
|
|
this software without specific prior written permission.
|
||
|
|
|
||
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
||
|
|
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
||
|
|
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
||
|
|
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
||
|
|
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
||
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
||
|
|
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
||
|
|
ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <fenv.h>
|
||
|
|
|
||
|
|
/* This implementation is intended to comply with the following
|
||
|
|
* specification:
|
||
|
|
*
|
||
|
|
* http://pubs.opengroup.org/onlinepubs/009695399/functions/fegetenv.html
|
||
|
|
* Referred to as 'fegetenv.html below.
|
||
|
|
*
|
||
|
|
* "The fegetenv() function shall attempt to store the current
|
||
|
|
* floating-point environment in the object pointed to by envp."
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
int fegetenv(fenv_t *envp)
|
||
|
|
{
|
||
|
|
|
||
|
|
#if __riscv_flen
|
||
|
|
|
||
|
|
/* Get the current environment (FCSR) */
|
||
|
|
|
||
|
|
fenv_t fcsr;
|
||
|
|
asm volatile("frcsr %0" : "=r"(fcsr));
|
||
|
|
|
||
|
|
/* Store FCSR in envp */
|
||
|
|
|
||
|
|
*envp = fcsr;
|
||
|
|
|
||
|
|
/* Per 'fegetenv.html:
|
||
|
|
*
|
||
|
|
* "If the representation was successfully stored, fegetenv() shall
|
||
|
|
* return zero. Otherwise, it shall return a non-zero value.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|