63 lines
2.5 KiB
C
63 lines
2.5 KiB
C
/* ldexpf4
|
|
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.
|
|
*/
|
|
|
|
#ifndef ___SIMD_MATH_LDEXPF4_H___
|
|
#define ___SIMD_MATH_LDEXPF4_H___
|
|
|
|
#include <simdmath.h>
|
|
#include <spu_intrinsics.h>
|
|
|
|
static inline vector float
|
|
_ldexpf4 (vector float x, vector signed int exp)
|
|
{
|
|
vec_int4 zeros = spu_splats(0);
|
|
|
|
vec_uint4 expmask = spu_splats(0x7F800000U);
|
|
vec_int4 e1 = spu_and((vec_int4)x, (vec_int4)expmask);
|
|
vec_int4 e2 = spu_rlmask(e1,-23);
|
|
|
|
vec_uint4 maxmask = spu_cmpgt(exp, 255);
|
|
vec_uint4 minmask = spu_cmpgt(spu_splats(-255), exp);
|
|
minmask = spu_or (minmask, spu_cmpeq(x, (vec_float4)zeros));
|
|
|
|
vec_int4 esum = spu_add(e2, exp);
|
|
|
|
maxmask = spu_or (maxmask, spu_cmpgt(esum, 255));
|
|
maxmask = spu_and(maxmask, spu_splats(0x7FFFFFFFU));
|
|
minmask = spu_or (minmask, spu_cmpgt(zeros, esum));
|
|
|
|
x = spu_sel(x, (vec_float4)spu_sl(esum,23), expmask);
|
|
x = spu_sel(x, (vec_float4)zeros, minmask);
|
|
//x = spu_sel(x, (vec_float4)spu_splats((int)0xFFFFFFFF), maxmask);
|
|
x = spu_sel(x, (vec_float4)maxmask, maxmask);
|
|
return x;
|
|
}
|
|
|
|
#endif
|