100 lines
4.2 KiB
C
100 lines
4.2 KiB
C
/* floord2 - for each of two doule slots, round up to smallest integer not more than the value.
|
|
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_FLOORD2_H___
|
|
#define ___SIMD_MATH_FLOORD2_H___
|
|
|
|
#include <simdmath.h>
|
|
#include <spu_intrinsics.h>
|
|
|
|
static inline vector double
|
|
_floord2(vector double in)
|
|
{
|
|
vec_uchar16 swap_words = ((vec_uchar16){4,5,6,7, 0,1,2,3, 12,13,14,15, 8,9,10,11});
|
|
vec_uchar16 splat_hi = ((vec_uchar16){0,1,2,3,0,1,2,3, 8,9,10,11, 8,9,10,11});
|
|
vec_uint4 one = ((vec_uint4){0, 1, 0, 1});
|
|
vec_int4 exp, shift;
|
|
vec_uint4 mask, mask_1, frac_mask, addend, insert, pos, equal0, e_0, e_00, e_sign, exp_ge0;
|
|
vec_ullong2 sign = spu_splats(0x8000000000000000ULL);
|
|
vec_double2 in_hi, out;
|
|
vec_double2 one_d = spu_splats((double)1.0);
|
|
vec_uint4 zero = spu_splats((unsigned int)0x0);
|
|
|
|
/* This function generates the following component
|
|
* based upon the inputs.
|
|
*
|
|
* mask = bits of the input that need to be replaced.
|
|
* insert = value of the bits that need to be replaced
|
|
* addend = value to be added to perform function.
|
|
*
|
|
* These are applied as follows:.
|
|
*
|
|
* out = ((in & mask) | insert) + addend
|
|
*/
|
|
|
|
in_hi = spu_shuffle(in, in, splat_hi);
|
|
exp = spu_and(spu_rlmask((vec_int4)in_hi, -20), 0x7FF);
|
|
shift = spu_sub(((vec_int4){1023, 1043, 1023, 1043}), exp);
|
|
|
|
/* clamp shift to the range 0 to -31.
|
|
*/
|
|
shift = spu_sel(spu_splats((int)-32), spu_andc(shift, (vec_int4)spu_cmpgt(shift, 0)), spu_cmpgt(shift, -32));
|
|
frac_mask = spu_rlmask(((vec_uint4){0xFFFFF, -1, 0xFFFFF, -1}), shift);
|
|
exp_ge0 = spu_cmpgt(exp, 0x3FE);
|
|
mask = spu_orc(frac_mask, exp_ge0);
|
|
|
|
/* addend = ((in & mask) && (in >= 0)) ? mask+1 : 0
|
|
*/
|
|
mask_1 = spu_addx(mask, one, spu_rlqwbyte(spu_genc(mask, one), 4));
|
|
pos = spu_cmpgt((vec_int4)in_hi, -1);
|
|
//pos = spu_cmpgt((vec_int4)in_hi, 0x0); //it is also work
|
|
equal0 = spu_cmpeq(spu_and((vec_uint4)in, mask), 0);
|
|
addend = spu_andc(spu_andc(mask_1, pos), spu_and(equal0, spu_shuffle(equal0, equal0, swap_words)));
|
|
|
|
/* insert
|
|
*/
|
|
e_0 = spu_cmpeq(spu_andc((vec_uint4)in, (vec_uint4)sign), zero);
|
|
e_00 = spu_and(e_0, spu_shuffle(e_0, e_0, swap_words));
|
|
// e_sign = spu_sel((vec_uint4)one_d, zero, spu_cmpeq( spu_and((vec_uint4)in_hi, spu_splats((unsigned int)0x80000000)), zero));
|
|
e_sign = spu_andc( (vec_uint4)one_d, spu_cmpeq( spu_and((vec_uint4)in_hi,spu_splats((unsigned int)0x80000000)), zero));
|
|
insert =spu_andc(spu_andc(e_sign, e_00), exp_ge0);
|
|
|
|
/* replace insert
|
|
*/
|
|
in = spu_sel(in, (vec_double2)insert, spu_andc((vec_ullong2)mask, sign));
|
|
|
|
/* in + addend
|
|
*/
|
|
out = (vec_double2)spu_addx((vec_uint4)in, addend, spu_rlqwbyte(spu_genc((vec_uint4)in, addend), 4));
|
|
|
|
return (out);
|
|
}
|
|
|
|
#endif
|