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FFmpeg/libavcodec/ppc/dsputil_altivec.c

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/*
* Copyright (c) 2002 Brian Foley
* Copyright (c) 2002 Dieter Shirley
* Copyright (c) 2003-2004 Romain Dolbeau <romain@dolbeau.org>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#if HAVE_ALTIVEC_H
#include <altivec.h>
#endif
#include "libavutil/attributes.h"
#include "libavutil/ppc/types_altivec.h"
#include "libavutil/ppc/util_altivec.h"
#include "libavcodec/dsputil.h"
#include "dsputil_altivec.h"
static int sad16_x2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s;
const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
vector unsigned char perm1 = vec_lvsl(0, pix2);
vector unsigned char perm2 = vec_add(perm1, vec_splat_u8(1));
vector unsigned char pix2l, pix2r;
vector unsigned char pix1v, pix2v, pix2iv, avgv, t5;
vector unsigned int sad;
vector signed int sumdiffs;
s = 0;
sad = (vector unsigned int)vec_splat_u32(0);
for (i = 0; i < h; i++) {
/* Read unaligned pixels into our vectors. The vectors are as follows:
pix1v: pix1[0]-pix1[15]
pix2v: pix2[0]-pix2[15] pix2iv: pix2[1]-pix2[16] */
pix1v = vec_ld( 0, pix1);
pix2l = vec_ld( 0, pix2);
pix2r = vec_ld(16, pix2);
pix2v = vec_perm(pix2l, pix2r, perm1);
pix2iv = vec_perm(pix2l, pix2r, perm2);
/* Calculate the average vector */
avgv = vec_avg(pix2v, pix2iv);
/* Calculate a sum of abs differences vector */
t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t5, sad);
pix1 += line_size;
pix2 += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
static int sad16_y2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s;
const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
vector unsigned char perm = vec_lvsl(0, pix2);
vector unsigned char pix2l, pix2r;
vector unsigned char pix1v, pix2v, pix3v, avgv, t5;
vector unsigned int sad;
vector signed int sumdiffs;
uint8_t *pix3 = pix2 + line_size;
s = 0;
sad = (vector unsigned int)vec_splat_u32(0);
/* Due to the fact that pix3 = pix2 + line_size, the pix3 of one
iteration becomes pix2 in the next iteration. We can use this
fact to avoid a potentially expensive unaligned read, each
time around the loop.
Read unaligned pixels into our vectors. The vectors are as follows:
pix2v: pix2[0]-pix2[15]
Split the pixel vectors into shorts */
pix2l = vec_ld( 0, pix2);
pix2r = vec_ld(15, pix2);
pix2v = vec_perm(pix2l, pix2r, perm);
for (i = 0; i < h; i++) {
/* Read unaligned pixels into our vectors. The vectors are as follows:
pix1v: pix1[0]-pix1[15]
pix3v: pix3[0]-pix3[15] */
pix1v = vec_ld(0, pix1);
pix2l = vec_ld( 0, pix3);
pix2r = vec_ld(15, pix3);
pix3v = vec_perm(pix2l, pix2r, perm);
/* Calculate the average vector */
avgv = vec_avg(pix2v, pix3v);
/* Calculate a sum of abs differences vector */
t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t5, sad);
pix1 += line_size;
pix2v = pix3v;
pix3 += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
static int sad16_xy2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s;
uint8_t *pix3 = pix2 + line_size;
const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
const vector unsigned short two = (const vector unsigned short)vec_splat_u16(2);
vector unsigned char avgv, t5;
vector unsigned char perm1 = vec_lvsl(0, pix2);
vector unsigned char perm2 = vec_add(perm1, vec_splat_u8(1));
vector unsigned char pix2l, pix2r;
vector unsigned char pix1v, pix2v, pix3v, pix2iv, pix3iv;
vector unsigned short pix2lv, pix2hv, pix2ilv, pix2ihv;
vector unsigned short pix3lv, pix3hv, pix3ilv, pix3ihv;
vector unsigned short avghv, avglv;
vector unsigned short t1, t2, t3, t4;
vector unsigned int sad;
vector signed int sumdiffs;
sad = (vector unsigned int)vec_splat_u32(0);
s = 0;
/* Due to the fact that pix3 = pix2 + line_size, the pix3 of one
iteration becomes pix2 in the next iteration. We can use this
fact to avoid a potentially expensive unaligned read, as well
as some splitting, and vector addition each time around the loop.
Read unaligned pixels into our vectors. The vectors are as follows:
pix2v: pix2[0]-pix2[15] pix2iv: pix2[1]-pix2[16]
Split the pixel vectors into shorts */
pix2l = vec_ld( 0, pix2);
pix2r = vec_ld(16, pix2);
pix2v = vec_perm(pix2l, pix2r, perm1);
pix2iv = vec_perm(pix2l, pix2r, perm2);
pix2hv = (vector unsigned short) vec_mergeh(zero, pix2v);
pix2lv = (vector unsigned short) vec_mergel(zero, pix2v);
pix2ihv = (vector unsigned short) vec_mergeh(zero, pix2iv);
pix2ilv = (vector unsigned short) vec_mergel(zero, pix2iv);
t1 = vec_add(pix2hv, pix2ihv);
t2 = vec_add(pix2lv, pix2ilv);
for (i = 0; i < h; i++) {
/* Read unaligned pixels into our vectors. The vectors are as follows:
pix1v: pix1[0]-pix1[15]
pix3v: pix3[0]-pix3[15] pix3iv: pix3[1]-pix3[16] */
pix1v = vec_ld(0, pix1);
pix2l = vec_ld( 0, pix3);
pix2r = vec_ld(16, pix3);
pix3v = vec_perm(pix2l, pix2r, perm1);
pix3iv = vec_perm(pix2l, pix2r, perm2);
/* Note that AltiVec does have vec_avg, but this works on vector pairs
and rounds up. We could do avg(avg(a,b),avg(c,d)), but the rounding
would mean that, for example, avg(3,0,0,1) = 2, when it should be 1.
Instead, we have to split the pixel vectors into vectors of shorts,
and do the averaging by hand. */
/* Split the pixel vectors into shorts */
pix3hv = (vector unsigned short) vec_mergeh(zero, pix3v);
pix3lv = (vector unsigned short) vec_mergel(zero, pix3v);
pix3ihv = (vector unsigned short) vec_mergeh(zero, pix3iv);
pix3ilv = (vector unsigned short) vec_mergel(zero, pix3iv);
/* Do the averaging on them */
t3 = vec_add(pix3hv, pix3ihv);
t4 = vec_add(pix3lv, pix3ilv);
avghv = vec_sr(vec_add(vec_add(t1, t3), two), two);
avglv = vec_sr(vec_add(vec_add(t2, t4), two), two);
/* Pack the shorts back into a result */
avgv = vec_pack(avghv, avglv);
/* Calculate a sum of abs differences vector */
t5 = vec_sub(vec_max(pix1v, avgv), vec_min(pix1v, avgv));
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t5, sad);
pix1 += line_size;
pix3 += line_size;
/* Transfer the calculated values for pix3 into pix2 */
t1 = t3;
t2 = t4;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
static int sad16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s;
const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
vector unsigned char perm = vec_lvsl(0, pix2);
vector unsigned char t1, t2, t3,t4, t5;
vector unsigned int sad;
vector signed int sumdiffs;
sad = (vector unsigned int)vec_splat_u32(0);
for (i = 0; i < h; i++) {
/* Read potentially unaligned pixels into t1 and t2 */
vector unsigned char pix2l = vec_ld( 0, pix2);
vector unsigned char pix2r = vec_ld(15, pix2);
t1 = vec_ld(0, pix1);
t2 = vec_perm(pix2l, pix2r, perm);
/* Calculate a sum of abs differences vector */
t3 = vec_max(t1, t2);
t4 = vec_min(t1, t2);
t5 = vec_sub(t3, t4);
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t5, sad);
pix1 += line_size;
pix2 += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
static int sad8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s;
const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
const vector unsigned char permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};
vector unsigned char perm1 = vec_lvsl(0, pix1);
vector unsigned char perm2 = vec_lvsl(0, pix2);
vector unsigned char t1, t2, t3,t4, t5;
vector unsigned int sad;
vector signed int sumdiffs;
sad = (vector unsigned int)vec_splat_u32(0);
for (i = 0; i < h; i++) {
/* Read potentially unaligned pixels into t1 and t2
Since we're reading 16 pixels, and actually only want 8,
mask out the last 8 pixels. The 0s don't change the sum. */
vector unsigned char pix1l = vec_ld(0, pix1);
vector unsigned char pix1r = vec_ld(7, pix1);
vector unsigned char pix2l = vec_ld(0, pix2);
vector unsigned char pix2r = vec_ld(7, pix2);
t1 = vec_and(vec_perm(pix1l, pix1r, perm1), permclear);
t2 = vec_and(vec_perm(pix2l, pix2r, perm2), permclear);
/* Calculate a sum of abs differences vector */
t3 = vec_max(t1, t2);
t4 = vec_min(t1, t2);
t5 = vec_sub(t3, t4);
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t5, sad);
pix1 += line_size;
pix2 += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
static int pix_norm1_altivec(uint8_t *pix, int line_size)
{
int i;
int s;
const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
vector unsigned char perm = vec_lvsl(0, pix);
vector unsigned char pixv;
vector unsigned int sv;
vector signed int sum;
sv = (vector unsigned int)vec_splat_u32(0);
s = 0;
for (i = 0; i < 16; i++) {
/* Read in the potentially unaligned pixels */
vector unsigned char pixl = vec_ld( 0, pix);
vector unsigned char pixr = vec_ld(15, pix);
pixv = vec_perm(pixl, pixr, perm);
/* Square the values, and add them to our sum */
sv = vec_msum(pixv, pixv, sv);
pix += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sum = vec_sums((vector signed int) sv, (vector signed int) zero);
sum = vec_splat(sum, 3);
vec_ste(sum, 0, &s);
return s;
}
/**
* Sum of Squared Errors for a 8x8 block.
* AltiVec-enhanced.
* It's the sad8_altivec code above w/ squaring added.
*/
static int sse8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s;
const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
const vector unsigned char permclear = (vector unsigned char){255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0};
vector unsigned char perm1 = vec_lvsl(0, pix1);
vector unsigned char perm2 = vec_lvsl(0, pix2);
vector unsigned char t1, t2, t3,t4, t5;
vector unsigned int sum;
vector signed int sumsqr;
sum = (vector unsigned int)vec_splat_u32(0);
for (i = 0; i < h; i++) {
/* Read potentially unaligned pixels into t1 and t2
Since we're reading 16 pixels, and actually only want 8,
mask out the last 8 pixels. The 0s don't change the sum. */
vector unsigned char pix1l = vec_ld(0, pix1);
vector unsigned char pix1r = vec_ld(7, pix1);
vector unsigned char pix2l = vec_ld(0, pix2);
vector unsigned char pix2r = vec_ld(7, pix2);
t1 = vec_and(vec_perm(pix1l, pix1r, perm1), permclear);
t2 = vec_and(vec_perm(pix2l, pix2r, perm2), permclear);
/* Since we want to use unsigned chars, we can take advantage
of the fact that abs(a-b)^2 = (a-b)^2. */
/* Calculate abs differences vector */
t3 = vec_max(t1, t2);
t4 = vec_min(t1, t2);
t5 = vec_sub(t3, t4);
/* Square the values and add them to our sum */
sum = vec_msum(t5, t5, sum);
pix1 += line_size;
pix2 += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
sumsqr = vec_splat(sumsqr, 3);
vec_ste(sumsqr, 0, &s);
return s;
}
/**
* Sum of Squared Errors for a 16x16 block.
* AltiVec-enhanced.
* It's the sad16_altivec code above w/ squaring added.
*/
static int sse16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s;
const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
vector unsigned char perm = vec_lvsl(0, pix2);
vector unsigned char t1, t2, t3,t4, t5;
vector unsigned int sum;
vector signed int sumsqr;
sum = (vector unsigned int)vec_splat_u32(0);
for (i = 0; i < h; i++) {
/* Read potentially unaligned pixels into t1 and t2 */
vector unsigned char pix2l = vec_ld( 0, pix2);
vector unsigned char pix2r = vec_ld(15, pix2);
t1 = vec_ld(0, pix1);
t2 = vec_perm(pix2l, pix2r, perm);
/* Since we want to use unsigned chars, we can take advantage
of the fact that abs(a-b)^2 = (a-b)^2. */
/* Calculate abs differences vector */
t3 = vec_max(t1, t2);
t4 = vec_min(t1, t2);
t5 = vec_sub(t3, t4);
/* Square the values and add them to our sum */
sum = vec_msum(t5, t5, sum);
pix1 += line_size;
pix2 += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumsqr = vec_sums((vector signed int) sum, (vector signed int) zero);
sumsqr = vec_splat(sumsqr, 3);
vec_ste(sumsqr, 0, &s);
return s;
}
static int pix_sum_altivec(uint8_t * pix, int line_size)
{
const vector unsigned int zero = (const vector unsigned int)vec_splat_u32(0);
vector unsigned char perm = vec_lvsl(0, pix);
vector unsigned char t1;
vector unsigned int sad;
vector signed int sumdiffs;
int i;
int s;
sad = (vector unsigned int)vec_splat_u32(0);
for (i = 0; i < 16; i++) {
/* Read the potentially unaligned 16 pixels into t1 */
vector unsigned char pixl = vec_ld( 0, pix);
vector unsigned char pixr = vec_ld(15, pix);
t1 = vec_perm(pixl, pixr, perm);
/* Add each 4 pixel group together and put 4 results into sad */
sad = vec_sum4s(t1, sad);
pix += line_size;
}
/* Sum up the four partial sums, and put the result into s */
sumdiffs = vec_sums((vector signed int) sad, (vector signed int) zero);
sumdiffs = vec_splat(sumdiffs, 3);
vec_ste(sumdiffs, 0, &s);
return s;
}
static void get_pixels_altivec(int16_t *restrict block, const uint8_t *pixels, int line_size)
{
int i;
vector unsigned char perm = vec_lvsl(0, pixels);
vector unsigned char bytes;
const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
vector signed short shorts;
for (i = 0; i < 8; i++) {
// Read potentially unaligned pixels.
// We're reading 16 pixels, and actually only want 8,
// but we simply ignore the extras.
vector unsigned char pixl = vec_ld(0, pixels);
vector unsigned char pixr = vec_ld(7, pixels);
bytes = vec_perm(pixl, pixr, perm);
// convert the bytes into shorts
shorts = (vector signed short)vec_mergeh(zero, bytes);
// save the data to the block, we assume the block is 16-byte aligned
vec_st(shorts, i*16, (vector signed short*)block);
pixels += line_size;
}
}
static void diff_pixels_altivec(int16_t *restrict block, const uint8_t *s1,
const uint8_t *s2, int stride)
{
int i;
vector unsigned char perm1 = vec_lvsl(0, s1);
vector unsigned char perm2 = vec_lvsl(0, s2);
vector unsigned char bytes, pixl, pixr;
const vector unsigned char zero = (const vector unsigned char)vec_splat_u8(0);
vector signed short shorts1, shorts2;
for (i = 0; i < 4; i++) {
// Read potentially unaligned pixels
// We're reading 16 pixels, and actually only want 8,
// but we simply ignore the extras.
pixl = vec_ld( 0, s1);
pixr = vec_ld(15, s1);
bytes = vec_perm(pixl, pixr, perm1);
// convert the bytes into shorts
shorts1 = (vector signed short)vec_mergeh(zero, bytes);
// Do the same for the second block of pixels
pixl = vec_ld( 0, s2);
pixr = vec_ld(15, s2);
bytes = vec_perm(pixl, pixr, perm2);
// convert the bytes into shorts
shorts2 = (vector signed short)vec_mergeh(zero, bytes);
// Do the subtraction
shorts1 = vec_sub(shorts1, shorts2);
// save the data to the block, we assume the block is 16-byte aligned
vec_st(shorts1, 0, (vector signed short*)block);
s1 += stride;
s2 += stride;
block += 8;
// The code below is a copy of the code above... This is a manual
// unroll.
// Read potentially unaligned pixels
// We're reading 16 pixels, and actually only want 8,
// but we simply ignore the extras.
pixl = vec_ld( 0, s1);
pixr = vec_ld(15, s1);
bytes = vec_perm(pixl, pixr, perm1);
// convert the bytes into shorts
shorts1 = (vector signed short)vec_mergeh(zero, bytes);
// Do the same for the second block of pixels
pixl = vec_ld( 0, s2);
pixr = vec_ld(15, s2);
bytes = vec_perm(pixl, pixr, perm2);
// convert the bytes into shorts
shorts2 = (vector signed short)vec_mergeh(zero, bytes);
// Do the subtraction
shorts1 = vec_sub(shorts1, shorts2);
// save the data to the block, we assume the block is 16-byte aligned
vec_st(shorts1, 0, (vector signed short*)block);
s1 += stride;
s2 += stride;
block += 8;
}
}
static void clear_block_altivec(int16_t *block) {
LOAD_ZERO;
vec_st(zero_s16v, 0, block);
vec_st(zero_s16v, 16, block);
vec_st(zero_s16v, 32, block);
vec_st(zero_s16v, 48, block);
vec_st(zero_s16v, 64, block);
vec_st(zero_s16v, 80, block);
vec_st(zero_s16v, 96, block);
vec_st(zero_s16v, 112, block);
}
static void add_bytes_altivec(uint8_t *dst, uint8_t *src, int w) {
register int i;
register vector unsigned char vdst, vsrc;
/* dst and src are 16 bytes-aligned (guaranteed) */
for (i = 0 ; (i + 15) < w ; i+=16) {
vdst = vec_ld(i, (unsigned char*)dst);
vsrc = vec_ld(i, (unsigned char*)src);
vdst = vec_add(vsrc, vdst);
vec_st(vdst, i, (unsigned char*)dst);
}
/* if w is not a multiple of 16 */
for (; (i < w) ; i++) {
dst[i] = src[i];
}
}
static int hadamard8_diff8x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){
int sum;
register const vector unsigned char vzero =
(const vector unsigned char)vec_splat_u8(0);
register vector signed short temp0, temp1, temp2, temp3, temp4,
temp5, temp6, temp7;
{
register const vector signed short vprod1 =(const vector signed short)
{ 1,-1, 1,-1, 1,-1, 1,-1 };
register const vector signed short vprod2 =(const vector signed short)
{ 1, 1,-1,-1, 1, 1,-1,-1 };
register const vector signed short vprod3 =(const vector signed short)
{ 1, 1, 1, 1,-1,-1,-1,-1 };
register const vector unsigned char perm1 = (const vector unsigned char)
{0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D};
register const vector unsigned char perm2 = (const vector unsigned char)
{0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B};
register const vector unsigned char perm3 = (const vector unsigned char)
{0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
#define ONEITERBUTTERFLY(i, res) \
{ \
register vector unsigned char src1, src2, srcO; \
register vector unsigned char dst1, dst2, dstO; \
register vector signed short srcV, dstV; \
register vector signed short but0, but1, but2, op1, op2, op3; \
src1 = vec_ld(stride * i, src); \
src2 = vec_ld((stride * i) + 15, src); \
srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src)); \
dst1 = vec_ld(stride * i, dst); \
dst2 = vec_ld((stride * i) + 15, dst); \
dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst)); \
/* promote the unsigned chars to signed shorts */ \
/* we're in the 8x8 function, we only care for the first 8 */ \
srcV = (vector signed short)vec_mergeh((vector signed char)vzero, \
(vector signed char)srcO); \
dstV = (vector signed short)vec_mergeh((vector signed char)vzero, \
(vector signed char)dstO); \
/* subtractions inside the first butterfly */ \
but0 = vec_sub(srcV, dstV); \
op1 = vec_perm(but0, but0, perm1); \
but1 = vec_mladd(but0, vprod1, op1); \
op2 = vec_perm(but1, but1, perm2); \
but2 = vec_mladd(but1, vprod2, op2); \
op3 = vec_perm(but2, but2, perm3); \
res = vec_mladd(but2, vprod3, op3); \
}
ONEITERBUTTERFLY(0, temp0);
ONEITERBUTTERFLY(1, temp1);
ONEITERBUTTERFLY(2, temp2);
ONEITERBUTTERFLY(3, temp3);
ONEITERBUTTERFLY(4, temp4);
ONEITERBUTTERFLY(5, temp5);
ONEITERBUTTERFLY(6, temp6);
ONEITERBUTTERFLY(7, temp7);
}
#undef ONEITERBUTTERFLY
{
register vector signed int vsum;
register vector signed short line0 = vec_add(temp0, temp1);
register vector signed short line1 = vec_sub(temp0, temp1);
register vector signed short line2 = vec_add(temp2, temp3);
register vector signed short line3 = vec_sub(temp2, temp3);
register vector signed short line4 = vec_add(temp4, temp5);
register vector signed short line5 = vec_sub(temp4, temp5);
register vector signed short line6 = vec_add(temp6, temp7);
register vector signed short line7 = vec_sub(temp6, temp7);
register vector signed short line0B = vec_add(line0, line2);
register vector signed short line2B = vec_sub(line0, line2);
register vector signed short line1B = vec_add(line1, line3);
register vector signed short line3B = vec_sub(line1, line3);
register vector signed short line4B = vec_add(line4, line6);
register vector signed short line6B = vec_sub(line4, line6);
register vector signed short line5B = vec_add(line5, line7);
register vector signed short line7B = vec_sub(line5, line7);
register vector signed short line0C = vec_add(line0B, line4B);
register vector signed short line4C = vec_sub(line0B, line4B);
register vector signed short line1C = vec_add(line1B, line5B);
register vector signed short line5C = vec_sub(line1B, line5B);
register vector signed short line2C = vec_add(line2B, line6B);
register vector signed short line6C = vec_sub(line2B, line6B);
register vector signed short line3C = vec_add(line3B, line7B);
register vector signed short line7C = vec_sub(line3B, line7B);
vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
vsum = vec_sum4s(vec_abs(line1C), vsum);
vsum = vec_sum4s(vec_abs(line2C), vsum);
vsum = vec_sum4s(vec_abs(line3C), vsum);
vsum = vec_sum4s(vec_abs(line4C), vsum);
vsum = vec_sum4s(vec_abs(line5C), vsum);
vsum = vec_sum4s(vec_abs(line6C), vsum);
vsum = vec_sum4s(vec_abs(line7C), vsum);
vsum = vec_sums(vsum, (vector signed int)vzero);
vsum = vec_splat(vsum, 3);
vec_ste(vsum, 0, &sum);
}
return sum;
}
/*
16x8 works with 16 elements; it allows to avoid replicating loads, and
give the compiler more rooms for scheduling. It's only used from
inside hadamard8_diff16_altivec.
Unfortunately, it seems gcc-3.3 is a bit dumb, and the compiled code has a LOT
of spill code, it seems gcc (unlike xlc) cannot keep everything in registers
by itself. The following code include hand-made registers allocation. It's not
clean, but on a 7450 the resulting code is much faster (best case fall from
700+ cycles to 550).
xlc doesn't add spill code, but it doesn't know how to schedule for the 7450,
and its code isn't much faster than gcc-3.3 on the 7450 (but uses 25% less
instructions...)
On the 970, the hand-made RA is still a win (around 690 vs. around 780), but
xlc goes to around 660 on the regular C code...
*/
static int hadamard8_diff16x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h) {
int sum;
register vector signed short
temp0 __asm__ ("v0"),
temp1 __asm__ ("v1"),
temp2 __asm__ ("v2"),
temp3 __asm__ ("v3"),
temp4 __asm__ ("v4"),
temp5 __asm__ ("v5"),
temp6 __asm__ ("v6"),
temp7 __asm__ ("v7");
register vector signed short
temp0S __asm__ ("v8"),
temp1S __asm__ ("v9"),
temp2S __asm__ ("v10"),
temp3S __asm__ ("v11"),
temp4S __asm__ ("v12"),
temp5S __asm__ ("v13"),
temp6S __asm__ ("v14"),
temp7S __asm__ ("v15");
register const vector unsigned char vzero __asm__ ("v31") =
(const vector unsigned char)vec_splat_u8(0);
{
register const vector signed short vprod1 __asm__ ("v16") =
(const vector signed short){ 1,-1, 1,-1, 1,-1, 1,-1 };
register const vector signed short vprod2 __asm__ ("v17") =
(const vector signed short){ 1, 1,-1,-1, 1, 1,-1,-1 };
register const vector signed short vprod3 __asm__ ("v18") =
(const vector signed short){ 1, 1, 1, 1,-1,-1,-1,-1 };
register const vector unsigned char perm1 __asm__ ("v19") =
(const vector unsigned char)
{0x02, 0x03, 0x00, 0x01, 0x06, 0x07, 0x04, 0x05,
0x0A, 0x0B, 0x08, 0x09, 0x0E, 0x0F, 0x0C, 0x0D};
register const vector unsigned char perm2 __asm__ ("v20") =
(const vector unsigned char)
{0x04, 0x05, 0x06, 0x07, 0x00, 0x01, 0x02, 0x03,
0x0C, 0x0D, 0x0E, 0x0F, 0x08, 0x09, 0x0A, 0x0B};
register const vector unsigned char perm3 __asm__ ("v21") =
(const vector unsigned char)
{0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07};
#define ONEITERBUTTERFLY(i, res1, res2) \
{ \
register vector unsigned char src1 __asm__ ("v22"), \
src2 __asm__ ("v23"), \
dst1 __asm__ ("v24"), \
dst2 __asm__ ("v25"), \
srcO __asm__ ("v22"), \
dstO __asm__ ("v23"); \
\
register vector signed short srcV __asm__ ("v24"), \
dstV __asm__ ("v25"), \
srcW __asm__ ("v26"), \
dstW __asm__ ("v27"), \
but0 __asm__ ("v28"), \
but0S __asm__ ("v29"), \
op1 __asm__ ("v30"), \
but1 __asm__ ("v22"), \
op1S __asm__ ("v23"), \
but1S __asm__ ("v24"), \
op2 __asm__ ("v25"), \
but2 __asm__ ("v26"), \
op2S __asm__ ("v27"), \
but2S __asm__ ("v28"), \
op3 __asm__ ("v29"), \
op3S __asm__ ("v30"); \
\
src1 = vec_ld(stride * i, src); \
src2 = vec_ld((stride * i) + 16, src); \
srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src)); \
dst1 = vec_ld(stride * i, dst); \
dst2 = vec_ld((stride * i) + 16, dst); \
dstO = vec_perm(dst1, dst2, vec_lvsl(stride * i, dst)); \
/* promote the unsigned chars to signed shorts */ \
srcV = (vector signed short)vec_mergeh((vector signed char)vzero, \
(vector signed char)srcO); \
dstV = (vector signed short)vec_mergeh((vector signed char)vzero, \
(vector signed char)dstO); \
srcW = (vector signed short)vec_mergel((vector signed char)vzero, \
(vector signed char)srcO); \
dstW = (vector signed short)vec_mergel((vector signed char)vzero, \
(vector signed char)dstO); \
/* subtractions inside the first butterfly */ \
but0 = vec_sub(srcV, dstV); \
but0S = vec_sub(srcW, dstW); \
op1 = vec_perm(but0, but0, perm1); \
but1 = vec_mladd(but0, vprod1, op1); \
op1S = vec_perm(but0S, but0S, perm1); \
but1S = vec_mladd(but0S, vprod1, op1S); \
op2 = vec_perm(but1, but1, perm2); \
but2 = vec_mladd(but1, vprod2, op2); \
op2S = vec_perm(but1S, but1S, perm2); \
but2S = vec_mladd(but1S, vprod2, op2S); \
op3 = vec_perm(but2, but2, perm3); \
res1 = vec_mladd(but2, vprod3, op3); \
op3S = vec_perm(but2S, but2S, perm3); \
res2 = vec_mladd(but2S, vprod3, op3S); \
}
ONEITERBUTTERFLY(0, temp0, temp0S);
ONEITERBUTTERFLY(1, temp1, temp1S);
ONEITERBUTTERFLY(2, temp2, temp2S);
ONEITERBUTTERFLY(3, temp3, temp3S);
ONEITERBUTTERFLY(4, temp4, temp4S);
ONEITERBUTTERFLY(5, temp5, temp5S);
ONEITERBUTTERFLY(6, temp6, temp6S);
ONEITERBUTTERFLY(7, temp7, temp7S);
}
#undef ONEITERBUTTERFLY
{
register vector signed int vsum;
register vector signed short line0S, line1S, line2S, line3S, line4S,
line5S, line6S, line7S, line0BS,line2BS,
line1BS,line3BS,line4BS,line6BS,line5BS,
line7BS,line0CS,line4CS,line1CS,line5CS,
line2CS,line6CS,line3CS,line7CS;
register vector signed short line0 = vec_add(temp0, temp1);
register vector signed short line1 = vec_sub(temp0, temp1);
register vector signed short line2 = vec_add(temp2, temp3);
register vector signed short line3 = vec_sub(temp2, temp3);
register vector signed short line4 = vec_add(temp4, temp5);
register vector signed short line5 = vec_sub(temp4, temp5);
register vector signed short line6 = vec_add(temp6, temp7);
register vector signed short line7 = vec_sub(temp6, temp7);
register vector signed short line0B = vec_add(line0, line2);
register vector signed short line2B = vec_sub(line0, line2);
register vector signed short line1B = vec_add(line1, line3);
register vector signed short line3B = vec_sub(line1, line3);
register vector signed short line4B = vec_add(line4, line6);
register vector signed short line6B = vec_sub(line4, line6);
register vector signed short line5B = vec_add(line5, line7);
register vector signed short line7B = vec_sub(line5, line7);
register vector signed short line0C = vec_add(line0B, line4B);
register vector signed short line4C = vec_sub(line0B, line4B);
register vector signed short line1C = vec_add(line1B, line5B);
register vector signed short line5C = vec_sub(line1B, line5B);
register vector signed short line2C = vec_add(line2B, line6B);
register vector signed short line6C = vec_sub(line2B, line6B);
register vector signed short line3C = vec_add(line3B, line7B);
register vector signed short line7C = vec_sub(line3B, line7B);
vsum = vec_sum4s(vec_abs(line0C), vec_splat_s32(0));
vsum = vec_sum4s(vec_abs(line1C), vsum);
vsum = vec_sum4s(vec_abs(line2C), vsum);
vsum = vec_sum4s(vec_abs(line3C), vsum);
vsum = vec_sum4s(vec_abs(line4C), vsum);
vsum = vec_sum4s(vec_abs(line5C), vsum);
vsum = vec_sum4s(vec_abs(line6C), vsum);
vsum = vec_sum4s(vec_abs(line7C), vsum);
line0S = vec_add(temp0S, temp1S);
line1S = vec_sub(temp0S, temp1S);
line2S = vec_add(temp2S, temp3S);
line3S = vec_sub(temp2S, temp3S);
line4S = vec_add(temp4S, temp5S);
line5S = vec_sub(temp4S, temp5S);
line6S = vec_add(temp6S, temp7S);
line7S = vec_sub(temp6S, temp7S);
line0BS = vec_add(line0S, line2S);
line2BS = vec_sub(line0S, line2S);
line1BS = vec_add(line1S, line3S);
line3BS = vec_sub(line1S, line3S);
line4BS = vec_add(line4S, line6S);
line6BS = vec_sub(line4S, line6S);
line5BS = vec_add(line5S, line7S);
line7BS = vec_sub(line5S, line7S);
line0CS = vec_add(line0BS, line4BS);
line4CS = vec_sub(line0BS, line4BS);
line1CS = vec_add(line1BS, line5BS);
line5CS = vec_sub(line1BS, line5BS);
line2CS = vec_add(line2BS, line6BS);
line6CS = vec_sub(line2BS, line6BS);
line3CS = vec_add(line3BS, line7BS);
line7CS = vec_sub(line3BS, line7BS);
vsum = vec_sum4s(vec_abs(line0CS), vsum);
vsum = vec_sum4s(vec_abs(line1CS), vsum);
vsum = vec_sum4s(vec_abs(line2CS), vsum);
vsum = vec_sum4s(vec_abs(line3CS), vsum);
vsum = vec_sum4s(vec_abs(line4CS), vsum);
vsum = vec_sum4s(vec_abs(line5CS), vsum);
vsum = vec_sum4s(vec_abs(line6CS), vsum);
vsum = vec_sum4s(vec_abs(line7CS), vsum);
vsum = vec_sums(vsum, (vector signed int)vzero);
vsum = vec_splat(vsum, 3);
vec_ste(vsum, 0, &sum);
}
return sum;
}
static int hadamard8_diff16_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){
int score;
score = hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
if (h==16) {
dst += 8*stride;
src += 8*stride;
score += hadamard8_diff16x8_altivec(s, dst, src, stride, 8);
}
return score;
}
av_cold void ff_dsputil_init_altivec(DSPContext *c, AVCodecContext *avctx)
{
const int high_bit_depth = avctx->bits_per_raw_sample > 8;
c->pix_abs[0][1] = sad16_x2_altivec;
c->pix_abs[0][2] = sad16_y2_altivec;
c->pix_abs[0][3] = sad16_xy2_altivec;
c->pix_abs[0][0] = sad16_altivec;
c->pix_abs[1][0] = sad8_altivec;
c->sad[0]= sad16_altivec;
c->sad[1]= sad8_altivec;
c->pix_norm1 = pix_norm1_altivec;
c->sse[1]= sse8_altivec;
c->sse[0]= sse16_altivec;
c->pix_sum = pix_sum_altivec;
c->diff_pixels = diff_pixels_altivec;
c->add_bytes= add_bytes_altivec;
if (!high_bit_depth) {
c->get_pixels = get_pixels_altivec;
c->clear_block = clear_block_altivec;
}
c->hadamard8_diff[0] = hadamard8_diff16_altivec;
c->hadamard8_diff[1] = hadamard8_diff8x8_altivec;
}