Retro68/gcc/newlib/libm/machine/spu/headers/logd2.h

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/* -------------------------------------------------------------- */
/* (C)Copyright 2001,2008, */
/* International Business Machines Corporation, */
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/* 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__ */