493 lines
16 KiB
C
493 lines
16 KiB
C
/*
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* Copyright (c) 2002 Brian Foley
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* Copyright (c) 2002 Dieter Shirley
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "../dsputil.h"
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#include "dsputil_altivec.h"
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#if CONFIG_DARWIN
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#include <sys/sysctl.h>
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#endif
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int pix_abs16x16_x2_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
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{
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int s, i;
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vector unsigned char *tv, zero;
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vector unsigned char pix1v, pix2v, pix2iv, avgv, t5;
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vector unsigned int sad;
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vector signed int sumdiffs;
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s = 0;
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zero = vec_splat_u8(0);
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sad = vec_splat_u32(0);
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for(i=0;i<16;i++) {
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/*
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Read unaligned pixels into our vectors. The vectors are as follows:
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pix1v: pix1[0]-pix1[15]
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pix2v: pix2[0]-pix2[15] pix2iv: pix2[1]-pix2[16]
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*/
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tv = (vector unsigned char *) pix1;
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pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
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tv = (vector unsigned char *) &pix2[0];
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pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
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tv = (vector unsigned char *) &pix2[1];
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pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));
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/* Calculate the average vector */
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avgv = vec_avg(pix2v, pix2iv);
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/* Calculate a sum of abs differences vector */
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t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
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/* Add each 4 pixel group together and put 4 results into sad */
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sad = vec_sum4s(t5, sad);
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pix1 += line_size;
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pix2 += line_size;
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}
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/* Sum up the four partial sums, and put the result into s */
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sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
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sumdiffs = vec_splat(sumdiffs, 3);
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vec_ste(sumdiffs, 0, &s);
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return s;
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}
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int pix_abs16x16_y2_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
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{
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int s, i;
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vector unsigned char *tv, zero;
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vector unsigned char pix1v, pix2v, pix3v, avgv, t5;
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vector unsigned int sad;
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vector signed int sumdiffs;
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uint8_t *pix3 = pix2 + line_size;
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s = 0;
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zero = vec_splat_u8(0);
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sad = vec_splat_u32(0);
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/*
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Due to the fact that pix3 = pix2 + line_size, the pix3 of one
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iteration becomes pix2 in the next iteration. We can use this
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fact to avoid a potentially expensive unaligned read, each
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time around the loop.
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Read unaligned pixels into our vectors. The vectors are as follows:
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pix2v: pix2[0]-pix2[15]
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Split the pixel vectors into shorts
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*/
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tv = (vector unsigned char *) &pix2[0];
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pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
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for(i=0;i<16;i++) {
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/*
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Read unaligned pixels into our vectors. The vectors are as follows:
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pix1v: pix1[0]-pix1[15]
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pix3v: pix3[0]-pix3[15]
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*/
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tv = (vector unsigned char *) pix1;
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pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
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tv = (vector unsigned char *) &pix3[0];
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pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));
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/* Calculate the average vector */
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avgv = vec_avg(pix2v, pix3v);
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/* Calculate a sum of abs differences vector */
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t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
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/* Add each 4 pixel group together and put 4 results into sad */
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sad = vec_sum4s(t5, sad);
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pix1 += line_size;
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pix2v = pix3v;
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pix3 += line_size;
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}
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/* Sum up the four partial sums, and put the result into s */
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sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
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sumdiffs = vec_splat(sumdiffs, 3);
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vec_ste(sumdiffs, 0, &s);
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return s;
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}
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int pix_abs16x16_xy2_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
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{
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int s, i;
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uint8_t *pix3 = pix2 + line_size;
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vector unsigned char *tv, avgv, t5, zero;
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vector unsigned char pix1v, pix2v, pix3v, pix2iv, pix3iv;
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vector unsigned short pix2lv, pix2hv, pix2ilv, pix2ihv;
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vector unsigned short pix3lv, pix3hv, pix3ilv, pix3ihv;
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vector unsigned short avghv, avglv, two;
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vector unsigned short t1, t2, t3, t4;
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vector unsigned int sad;
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vector signed int sumdiffs;
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zero = vec_splat_u8(0);
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two = vec_splat_u16(2);
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sad = vec_splat_u32(0);
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s = 0;
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/*
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Due to the fact that pix3 = pix2 + line_size, the pix3 of one
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iteration becomes pix2 in the next iteration. We can use this
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fact to avoid a potentially expensive unaligned read, as well
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as some splitting, and vector addition each time around the loop.
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Read unaligned pixels into our vectors. The vectors are as follows:
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pix2v: pix2[0]-pix2[15] pix2iv: pix2[1]-pix2[16]
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Split the pixel vectors into shorts
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*/
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tv = (vector unsigned char *) &pix2[0];
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pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
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tv = (vector unsigned char *) &pix2[1];
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pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));
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pix2hv = (vector unsigned short) vec_mergeh(zero, pix2v);
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pix2lv = (vector unsigned short) vec_mergel(zero, pix2v);
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pix2ihv = (vector unsigned short) vec_mergeh(zero, pix2iv);
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pix2ilv = (vector unsigned short) vec_mergel(zero, pix2iv);
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t1 = vec_add(pix2hv, pix2ihv);
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t2 = vec_add(pix2lv, pix2ilv);
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for(i=0;i<16;i++) {
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/*
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Read unaligned pixels into our vectors. The vectors are as follows:
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pix1v: pix1[0]-pix1[15]
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pix3v: pix3[0]-pix3[15] pix3iv: pix3[1]-pix3[16]
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*/
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tv = (vector unsigned char *) pix1;
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pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
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tv = (vector unsigned char *) &pix3[0];
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pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));
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tv = (vector unsigned char *) &pix3[1];
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pix3iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[1]));
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/*
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Note that Altivec does have vec_avg, but this works on vector pairs
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and rounds up. We could do avg(avg(a,b),avg(c,d)), but the rounding
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would mean that, for example, avg(3,0,0,1) = 2, when it should be 1.
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Instead, we have to split the pixel vectors into vectors of shorts,
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and do the averaging by hand.
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*/
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/* Split the pixel vectors into shorts */
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pix3hv = (vector unsigned short) vec_mergeh(zero, pix3v);
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pix3lv = (vector unsigned short) vec_mergel(zero, pix3v);
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pix3ihv = (vector unsigned short) vec_mergeh(zero, pix3iv);
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pix3ilv = (vector unsigned short) vec_mergel(zero, pix3iv);
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/* Do the averaging on them */
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t3 = vec_add(pix3hv, pix3ihv);
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t4 = vec_add(pix3lv, pix3ilv);
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avghv = vec_sr(vec_add(vec_add(t1, t3), two), two);
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avglv = vec_sr(vec_add(vec_add(t2, t4), two), two);
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/* Pack the shorts back into a result */
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avgv = vec_pack(avghv, avglv);
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/* Calculate a sum of abs differences vector */
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t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
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/* Add each 4 pixel group together and put 4 results into sad */
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sad = vec_sum4s(t5, sad);
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pix1 += line_size;
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pix3 += line_size;
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/* Transfer the calculated values for pix3 into pix2 */
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t1 = t3;
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t2 = t4;
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}
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/* Sum up the four partial sums, and put the result into s */
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sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
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sumdiffs = vec_splat(sumdiffs, 3);
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vec_ste(sumdiffs, 0, &s);
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return s;
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}
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int pix_abs16x16_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
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{
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int i, s;
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vector unsigned char perm1, perm2, *pix1v, *pix2v;
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vector unsigned char t1, t2, t3,t4, t5;
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vector unsigned int sad, zero;
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vector signed int sumdiffs;
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zero = (vector unsigned int) (0);
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sad = (vector unsigned int) (0);
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for(i=0;i<16;i++) {
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/* Read potentially unaligned pixels into t1 and t2 */
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perm1 = vec_lvsl(0, pix1);
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pix1v = (vector unsigned char *) pix1;
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perm2 = vec_lvsl(0, pix2);
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pix2v = (vector unsigned char *) pix2;
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t1 = vec_perm(pix1v[0], pix1v[1], perm1);
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t2 = vec_perm(pix2v[0], pix2v[1], perm2);
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/* Calculate a sum of abs differences vector */
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t3 = vec_max(t1, t2);
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t4 = vec_min(t1, t2);
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t5 = vec_sub(t3, t4);
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/* Add each 4 pixel group together and put 4 results into sad */
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sad = vec_sum4s(t5, sad);
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pix1 += line_size;
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pix2 += line_size;
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}
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/* Sum up the four partial sums, and put the result into s */
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sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
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sumdiffs = vec_splat(sumdiffs, 3);
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vec_ste(sumdiffs, 0, &s);
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return s;
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}
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int pix_abs8x8_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
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{
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int i, s;
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vector unsigned char perm1, perm2, permclear, *pix1v, *pix2v;
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vector unsigned char t1, t2, t3,t4, t5;
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vector unsigned int sad, zero;
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vector signed int sumdiffs;
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zero = (vector unsigned int) (0);
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sad = (vector unsigned int) (0);
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permclear = (vector unsigned char) (255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0);
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for(i=0;i<8;i++) {
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/* Read potentially unaligned pixels into t1 and t2
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Since we're reading 16 pixels, and actually only want 8,
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mask out the last 8 pixels. The 0s don't change the sum. */
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perm1 = vec_lvsl(0, pix1);
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pix1v = (vector unsigned char *) pix1;
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perm2 = vec_lvsl(0, pix2);
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pix2v = (vector unsigned char *) pix2;
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t1 = vec_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);
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t2 = vec_and(vec_perm(pix2v[0], pix2v[1], perm2), permclear);
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/* Calculate a sum of abs differences vector */
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t3 = vec_max(t1, t2);
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t4 = vec_min(t1, t2);
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t5 = vec_sub(t3, t4);
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/* Add each 4 pixel group together and put 4 results into sad */
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sad = vec_sum4s(t5, sad);
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pix1 += line_size;
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pix2 += line_size;
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}
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/* Sum up the four partial sums, and put the result into s */
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sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
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sumdiffs = vec_splat(sumdiffs, 3);
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vec_ste(sumdiffs, 0, &s);
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return s;
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}
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int pix_norm1_altivec(uint8_t *pix, int line_size)
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{
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int s, i;
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vector unsigned char *tv, zero;
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vector unsigned char pixv;
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vector unsigned int sv;
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vector signed int sum;
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zero = vec_splat_u8(0);
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sv = vec_splat_u32(0);
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s = 0;
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for (i = 0; i < 16; i++) {
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/* Read in the potentially unaligned pixels */
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tv = (vector unsigned char *) pix;
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pixv = vec_perm(tv[0], tv[1], vec_lvsl(0, pix));
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/* Square the values, and add them to our sum */
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sv = vec_msum(pixv, pixv, sv);
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pix += line_size;
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}
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/* Sum up the four partial sums, and put the result into s */
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sum = vec_sums((vector signed int) sv, (vector signed int) zero);
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sum = vec_splat(sum, 3);
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vec_ste(sum, 0, &s);
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return s;
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}
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int pix_sum_altivec(UINT8 * pix, int line_size)
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{
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vector unsigned char perm, *pixv;
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vector unsigned char t1;
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vector unsigned int sad, zero;
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vector signed int sumdiffs;
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int s, i;
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zero = (vector unsigned int) (0);
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sad = (vector unsigned int) (0);
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for (i = 0; i < 16; i++) {
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/* Read the potentially unaligned 16 pixels into t1 */
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perm = vec_lvsl(0, pix);
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pixv = (vector unsigned char *) pix;
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t1 = vec_perm(pixv[0], pixv[1], perm);
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/* Add each 4 pixel group together and put 4 results into sad */
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sad = vec_sum4s(t1, sad);
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pix += line_size;
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}
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/* Sum up the four partial sums, and put the result into s */
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sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
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sumdiffs = vec_splat(sumdiffs, 3);
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vec_ste(sumdiffs, 0, &s);
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return s;
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}
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void get_pixels_altivec(DCTELEM *restrict block, const UINT8 *pixels, int line_size)
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{
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int i;
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vector unsigned char perm, bytes, *pixv;
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vector unsigned char zero = (vector unsigned char) (0);
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vector signed short shorts;
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for(i=0;i<8;i++)
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{
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// Read potentially unaligned pixels.
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// We're reading 16 pixels, and actually only want 8,
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// but we simply ignore the extras.
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perm = vec_lvsl(0, pixels);
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pixv = (vector unsigned char *) pixels;
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bytes = vec_perm(pixv[0], pixv[1], perm);
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// convert the bytes into shorts
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shorts = (vector signed short)vec_mergeh(zero, bytes);
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// save the data to the block, we assume the block is 16-byte aligned
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vec_st(shorts, i*16, (vector signed short*)block);
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pixels += line_size;
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}
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}
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void diff_pixels_altivec(DCTELEM *restrict block, const UINT8 *s1,
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const UINT8 *s2, int stride)
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{
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int i;
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vector unsigned char perm, bytes, *pixv;
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vector unsigned char zero = (vector unsigned char) (0);
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vector signed short shorts1, shorts2;
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for(i=0;i<4;i++)
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{
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// Read potentially unaligned pixels
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// We're reading 16 pixels, and actually only want 8,
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// but we simply ignore the extras.
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perm = vec_lvsl(0, s1);
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pixv = (vector unsigned char *) s1;
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bytes = vec_perm(pixv[0], pixv[1], perm);
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// convert the bytes into shorts
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shorts1 = (vector signed short)vec_mergeh(zero, bytes);
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// Do the same for the second block of pixels
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perm = vec_lvsl(0, s2);
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pixv = (vector unsigned char *) s2;
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bytes = vec_perm(pixv[0], pixv[1], perm);
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// convert the bytes into shorts
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shorts2 = (vector signed short)vec_mergeh(zero, bytes);
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// Do the subtraction
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shorts1 = vec_sub(shorts1, shorts2);
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// save the data to the block, we assume the block is 16-byte aligned
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vec_st(shorts1, 0, (vector signed short*)block);
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s1 += stride;
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s2 += stride;
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block += 8;
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// The code below is a copy of the code above... This is a manual
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// unroll.
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// Read potentially unaligned pixels
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// We're reading 16 pixels, and actually only want 8,
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// but we simply ignore the extras.
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perm = vec_lvsl(0, s1);
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pixv = (vector unsigned char *) s1;
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bytes = vec_perm(pixv[0], pixv[1], perm);
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// convert the bytes into shorts
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shorts1 = (vector signed short)vec_mergeh(zero, bytes);
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// Do the same for the second block of pixels
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perm = vec_lvsl(0, s2);
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pixv = (vector unsigned char *) s2;
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bytes = vec_perm(pixv[0], pixv[1], perm);
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// convert the bytes into shorts
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shorts2 = (vector signed short)vec_mergeh(zero, bytes);
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// Do the subtraction
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shorts1 = vec_sub(shorts1, shorts2);
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// save the data to the block, we assume the block is 16-byte aligned
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vec_st(shorts1, 0, (vector signed short*)block);
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s1 += stride;
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s2 += stride;
|
|
block += 8;
|
|
}
|
|
}
|
|
|
|
|
|
int has_altivec(void)
|
|
{
|
|
#if CONFIG_DARWIN
|
|
int sels[2] = {CTL_HW, HW_VECTORUNIT};
|
|
int has_vu = 0;
|
|
size_t len = sizeof(has_vu);
|
|
int err;
|
|
|
|
err = sysctl(sels, 2, &has_vu, &len, NULL, 0);
|
|
|
|
if (err == 0) return (has_vu != 0);
|
|
#endif
|
|
return 0;
|
|
}
|
|
|