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fasthyperbolic.h
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fasthyperbolic.h
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/*=====================================================================*
* Copyright (C) 2011 Paul Mineiro *
* 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 Paul Mineiro nor the names *
* of other 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. *
* *
* Contact: Paul Mineiro <paul@mineiro.com> *
*=====================================================================*/
#ifndef __FAST_HYPERBOLIC_H_
#define __FAST_HYPERBOLIC_H_
#include <stdint.h>
#include "sse.h"
#include "fastexp.h"
static inline float
fastsinh (float p)
{
return 0.5f * (fastexp (p) - fastexp (-p));
}
static inline float
fastersinh (float p)
{
return 0.5f * (fasterexp (p) - fasterexp (-p));
}
static inline float
fastcosh (float p)
{
return 0.5f * (fastexp (p) + fastexp (-p));
}
static inline float
fastercosh (float p)
{
return 0.5f * (fasterexp (p) + fasterexp (-p));
}
static inline float
fasttanh (float p)
{
return -1.0f + 2.0f / (1.0f + fastexp (-2.0f * p));
}
static inline float
fastertanh (float p)
{
return -1.0f + 2.0f / (1.0f + fasterexp (-2.0f * p));
}
#ifdef __SSE2__
static inline v4sf
vfastsinh (const v4sf p)
{
const v4sf c_0_5 = v4sfl (0.5f);
return c_0_5 * (vfastexp (p) - vfastexp (-p));
}
static inline v4sf
vfastersinh (const v4sf p)
{
const v4sf c_0_5 = v4sfl (0.5f);
return c_0_5 * (vfasterexp (p) - vfasterexp (-p));
}
static inline v4sf
vfastcosh (const v4sf p)
{
const v4sf c_0_5 = v4sfl (0.5f);
return c_0_5 * (vfastexp (p) + vfastexp (-p));
}
static inline v4sf
vfastercosh (const v4sf p)
{
const v4sf c_0_5 = v4sfl (0.5f);
return c_0_5 * (vfasterexp (p) + vfasterexp (-p));
}
static inline v4sf
vfasttanh (const v4sf p)
{
const v4sf c_1 = v4sfl (1.0f);
const v4sf c_2 = v4sfl (2.0f);
return -c_1 + c_2 / (c_1 + vfastexp (-c_2 * p));
}
static inline v4sf
vfastertanh (const v4sf p)
{
const v4sf c_1 = v4sfl (1.0f);
const v4sf c_2 = v4sfl (2.0f);
return -c_1 + c_2 / (c_1 + vfasterexp (-c_2 * p));
}
#endif //__SSE2__
#endif // __FAST_HYPERBOLIC_H_