258 lines
7.7 KiB
C
258 lines
7.7 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_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_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;
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block += 8;
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}
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}
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int has_altivec(void)
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{
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#if CONFIG_DARWIN
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int sels[2] = {CTL_HW, HW_VECTORUNIT};
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int has_vu = 0;
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size_t len = sizeof(has_vu);
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int err;
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err = sysctl(sels, 2, &has_vu, &len, NULL, 0);
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if (err == 0) return (has_vu != 0);
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#endif
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return 0;
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}
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