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Added SCE SIMD math library in Extras/simdmathlibrary

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The upcoming vectormath that will used to speed up the SPU version of Extras/BulletMultiThreaded depends on this.
This commit is contained in:
ejcoumans
2007-07-23 04:58:24 +00:00
parent 685138d033
commit 7529cdb3f6
287 changed files with 32064 additions and 0 deletions
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73
Extras/simdmathlibrary/ppu/logf4.c Normal file
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/* logf4 -
Copyright (C) 2006, 2007 Sony Computer Entertainment Inc.
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 the Sony Computer Entertainment Inc 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.
*/
#include <simdmath.h>
#include <altivec.h>
#include "common-types.h"
#define _LOGF_H_ln2msb ((float)(0.6931470632553f))
#define _LOGF_H_negln2lsb ((float)(-1.1730463525e-7f))
#define _LOGF_H_c0 ((float)(-0.2988439998f))
#define _LOGF_H_c1 ((float)(-0.3997655209f))
#define _LOGF_H_c2 ((float)(-0.6666679125f))
vector float
logf4 (vector float x)
{
vec_int4 zeros = vec_splatsi4(0);
vec_float4 ones = vec_splatsf4(1.0f);
//vec_uchar16 zeromask = (vec_uchar16)vec_cmpeq(x, (vec_float4)zeros);
vec_int4 expmask = vec_splatsi4(0x7F800000);
vec_int4 xexp = vec_add( vec_sr(vec_and((vec_int4)x, expmask), vec_splatsu4(23)), vec_splatsi4(-126) );
x = vec_sel(x, (vec_float4)(vec_splatsi4(0x3F000000)), (vec_uint4)expmask);
vec_uint4 mask = (vec_uint4)vec_cmpgt(vec_splatsf4((float)0.7071067811865f), x);
x = vec_sel(x , vec_add(x, x) , mask);
xexp = vec_sel(xexp, vec_sub(xexp,vec_splatsi4(1)), mask);
vec_float4 x1 = vec_sub(x , ones);
vec_float4 z = divf4 (x1, vec_add(x, ones));
vec_float4 w = vec_madd(z , z, (vec_float4)zeros);
vec_float4 polywneg;
polywneg = vec_madd(vec_splatsf4(_LOGF_H_c0), w, vec_splatsf4(_LOGF_H_c1));
polywneg = vec_madd(polywneg , w, vec_splatsf4(_LOGF_H_c2));
vec_float4 y = vec_madd(z, vec_madd(polywneg, w, x1), (vec_float4)zeros);
vec_float4 wnew = vec_ctf(xexp,0);
vec_float4 zz1 = vec_madd(vec_splatsf4(_LOGF_H_ln2msb) , wnew, x1);
vec_float4 zz2neg = vec_madd(vec_splatsf4(_LOGF_H_negln2lsb), wnew, y );
//return vec_sel(vec_sub(zz1,zz2neg), (vec_float4)zeromask, zeromask);
return vec_sub(zz1,zz2neg);
}