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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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103
Extras/simdmathlibrary/ppu/cbrtf4.c Normal file
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/* cbrtf4 -
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 __calcQuot(xexp) n = xexp; \
vec_uint4 negxexpmask = (vec_uint4)vec_cmpgt( ((vec_int4){0, 0, 0, 0}) , n); \
n = vec_sel(n, vec_add(n, ((vec_int4){2, 2, 2, 2}) ), negxexpmask); \
\
quot = vec_add(vec_sra(n, ((vec_uint4){2, 2, 2, 2}) ), vec_sra(n, ((vec_uint4){4, 4, 4, 4}) )); \
quot = vec_add(quot, vec_sra(quot, ((vec_uint4){4, 4, 4, 4}) )); \
quot = vec_add(quot, vec_sra(quot, ((vec_uint4){8, 8, 8, 8}) )); \
quot = vec_add(quot, vec_sra(quot, ((vec_uint4){16, 16, 16, 16}) )); \
vec_int4 r = vec_sub(vec_sub(n,quot), vec_sl(quot, ((vec_uint4){1, 1, 1, 1}) )); \
quot = vec_add( \
quot, \
vec_sra( \
vec_add( \
vec_add(r,((vec_int4){5, 5, 5, 5})), \
vec_sl (r,((vec_uint4){2, 2, 2, 2})) \
), \
((vec_uint4){4, 4, 4, 4}) \
) \
); \
#define _CBRTF_H_cbrt2 1.2599210498948731648 // 2^(1/3)
#define _CBRTF_H_sqr_cbrt2 1.5874010519681994748 // 2^(2/3)
vector float
cbrtf4 (vector float x)
{
vec_float4 zeros = (vec_float4){0.0f, 0.0f, 0.0f, 0.0f};
vec_int4 xexp, n;
vec_float4 sgnmask = (vec_float4)(vec_splatsi4(0x80000000));
vec_uint4 negmask = (vec_uint4)vec_cmpgt(zeros, x);
x = vec_andc(x, sgnmask);
x = frexpf4(x, &xexp);
vec_float4 p = vec_madd(
vec_madd(x, vec_splatsf4(-0.191502161678719066f), vec_splatsf4(0.697570460207922770f)),
x,
vec_splatsf4(0.492659620528969547f)
);
vec_float4 p3 = vec_madd(p, vec_madd(p, p, zeros), zeros);
vec_int4 quot;
__calcQuot(xexp);
vec_int4 modval = vec_sub(vec_sub(xexp,quot), vec_sl(quot,vec_splatsu4(1))); // mod = xexp - 3*quotient
vec_float4 factor = vec_splatsf4(1.0/_CBRTF_H_sqr_cbrt2);
factor = vec_sel(factor, vec_splatsf4(1.0/_CBRTF_H_cbrt2), vec_cmpeq(modval,vec_splatsi4(-1)));
factor = vec_sel(factor, vec_splatsf4( 1.0), vec_cmpeq(modval,vec_splatsi4( 0)));
factor = vec_sel(factor, vec_splatsf4( _CBRTF_H_cbrt2), vec_cmpeq(modval,vec_splatsi4( 1)));
factor = vec_sel(factor, vec_splatsf4(_CBRTF_H_sqr_cbrt2), vec_cmpeq(modval,vec_splatsi4( 2)));
vec_float4 pre = vec_madd(p, factor, zeros);
vec_float4 numr = vec_madd(x , vec_splatsf4(2.0f), p3);
vec_float4 denr = vec_madd(p3, vec_splatsf4(2.0f), x );
vec_float4 res = vec_madd(pre, divf4(numr, denr), zeros);
res = ldexpf4(res, quot);
return vec_sel(res, vec_or(res,sgnmask), negmask);
}
/*
_FUNC_DEF(vec_float4, cbrtf4, (vec_float4 x))
{
vec_uint4 neg = (vec_uint4)vec_cmpgt((vec_float4)(0.0f), x);
vec_float4 sbit = (vec_float4)(vec_float4)((int)0x80000000);
vec_float4 absx = vec_andc(x, sbit);
vec_float4 res = exp2f4(vec_mul((vec_float4)(0.3333333333333f), log2f4(absx)));
res = vec_sel(res, vec_or(sbit, res), neg);
return res;
}
*/