97 lines
3.5 KiB
C
97 lines
3.5 KiB
C
/*
|
|
This Software is provided under the Zope Public License (ZPL) Version 2.1.
|
|
|
|
Copyright (c) 2009, 2010 by the mingw-w64 project
|
|
|
|
See the AUTHORS file for the list of contributors to the mingw-w64 project.
|
|
|
|
This license has been certified as open source. It has also been designated
|
|
as GPL compatible by the Free Software Foundation (FSF).
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions are met:
|
|
|
|
1. Redistributions in source code must retain the accompanying copyright
|
|
notice, this list of conditions, and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the accompanying
|
|
copyright notice, this list of conditions, and the following disclaimer
|
|
in the documentation and/or other materials provided with the
|
|
distribution.
|
|
3. Names of the copyright holders must not be used to endorse or promote
|
|
products derived from this software without prior written permission
|
|
from the copyright holders.
|
|
4. The right to distribute this software or to use it for any purpose does
|
|
not give you the right to use Servicemarks (sm) or Trademarks (tm) of
|
|
the copyright holders. Use of them is covered by separate agreement
|
|
with the copyright holders.
|
|
5. If any files are modified, you must cause the modified files to carry
|
|
prominent notices stating that you changed the files and the date of
|
|
any change.
|
|
|
|
Disclaimer
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY EXPRESSED
|
|
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 HOLDERS 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 "complex_internal.h"
|
|
#include <errno.h>
|
|
|
|
#if defined(__arm__) || defined(_ARM_)
|
|
/* This works around a compiler bug, normally you would inline it with e.g.
|
|
* asm ("fsqrts %[dst], %[src];\n" : [dst] "=w" (res) : [src] "w" (x));
|
|
*/
|
|
__FLT_TYPE __fsqrt_internal( __FLT_TYPE x );
|
|
asm volatile(".def __fsqrt_internal; .scl 2; .type 32; .endef\n"
|
|
"\t.text\n"
|
|
"\t.align 4\n"
|
|
"\t.globl __fsqrt_internal\n"
|
|
"__fsqrt_internal:\n"
|
|
#if _NEW_COMPLEX_FLOAT
|
|
"\t" "fsqrts s0, s0\n"
|
|
#else
|
|
"\t" "fsqrtd d0, d0\n"
|
|
#endif /* _NEW_COMPLEX_FLOAT */
|
|
"\tbx lr");
|
|
#endif /* defined(__arm__) || defined(_ARM_) */
|
|
|
|
__FLT_TYPE
|
|
__FLT_ABI (sqrt) (__FLT_TYPE x)
|
|
{
|
|
__FLT_TYPE res = __FLT_CST (0.0);
|
|
int x_class = fpclassify (x);
|
|
if (x_class == FP_NAN || signbit (x))
|
|
{
|
|
if (x_class == FP_ZERO)
|
|
return __FLT_CST (-0.0);
|
|
|
|
if (x_class == FP_NAN)
|
|
return x;
|
|
|
|
errno = EDOM;
|
|
return -__FLT_NAN;
|
|
}
|
|
else if (x_class == FP_ZERO)
|
|
return __FLT_CST (0.0);
|
|
else if (x_class == FP_INFINITE)
|
|
return __FLT_HUGE_VAL;
|
|
else if (x == __FLT_CST (1.0))
|
|
return __FLT_CST (1.0);
|
|
#if defined(__arm__) || defined(_ARM_)
|
|
__fsqrt_internal(x);
|
|
#elif defined(_X86_) || defined(__i386__) || defined(_AMD64_) || defined(__x86_64__)
|
|
asm volatile ("fsqrt" : "=t" (res) : "0" (x));
|
|
#else
|
|
#error Not supported on your platform yet
|
|
#endif
|
|
return res;
|
|
}
|