mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-11 19:49:32 +00:00
68 lines
3.3 KiB
C
68 lines
3.3 KiB
C
/* -------------------------------------------------------------- */
|
|
/* (C)Copyright 2001,2008, */
|
|
/* International Business Machines Corporation, */
|
|
/* Sony Computer Entertainment, Incorporated, */
|
|
/* Toshiba Corporation, */
|
|
/* */
|
|
/* 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 name of IBM Corporation nor the names of its */
|
|
/* 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. */
|
|
/* -------------------------------------------------------------- */
|
|
/* PROLOG END TAG zYx */
|
|
#ifdef __SPU__
|
|
#ifndef _LOGD2_H_
|
|
#define _LOGD2_H_ 1
|
|
|
|
#include <spu_intrinsics.h>
|
|
#include "simdmath.h"
|
|
#include "log2d2.h"
|
|
|
|
|
|
/*
|
|
* FUNCTION
|
|
* vector double _logd2(vector double x)
|
|
*
|
|
* DESCRIPTION
|
|
* The _logd2 function computes the natural log for each double word
|
|
* element of the input x. _logd2 is computed using log2d2 as follows:
|
|
*
|
|
* logd2(x) = log2d2(x) / log2d2(e) = log2d2(x) * logd2(2)
|
|
*
|
|
*/
|
|
static __inline vector double _logd2(vector double x)
|
|
{
|
|
return (spu_mul(_log2d2(x), spu_splats(SM_LN2)));
|
|
}
|
|
|
|
#endif /* _LOGD2_H_ */
|
|
#endif /* __SPU__ */
|