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FFmpeg/libavcodec/ppc/me_cmp.c
Luca Barbato da60b99a88 ppc: Restrict some Altivec implementations to Big Endian 
In Little Endian the vec_ld/vec_st operations work as
expected only for byte-vectors.
2015-05-31 12:07:11 +02:00

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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 Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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/cpu.h"
#include "libavutil/ppc/cpu.h"
#include "libavutil/ppc/types_altivec.h"
#include "libavutil/ppc/util_altivec.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/mpegvideo.h"
#include "libavcodec/me_cmp.h"
#if HAVE_ALTIVEC && HAVE_BIGENDIAN
static int sad16_x2_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
ptrdiff_t stride, int h)
{
int i, s = 0;
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 int sad = (vector unsigned int) vec_splat_u32(0);
vector signed int sumdiffs;
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] */
vector unsigned char pix1v = vec_ld(0, pix1);
vector unsigned char pix2l = vec_ld(0, pix2);
vector unsigned char pix2r = vec_ld(16, pix2);
vector unsigned char pix2v = vec_perm(pix2l, pix2r, perm1);
vector unsigned char pix2iv = vec_perm(pix2l, pix2r, perm2);
/* Calculate the average vector. */
vector unsigned char avgv = vec_avg(pix2v, pix2iv);
/* Calculate a sum of abs differences vector. */
vector unsigned char 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 += stride;
pix2 += stride;
}
/* 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(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
ptrdiff_t stride, int h)
{
int i, s = 0;
const vector unsigned char zero =
(const vector unsigned char) vec_splat_u8(0);
vector unsigned char perm = vec_lvsl(0, pix2);
vector unsigned char pix1v, pix3v, avgv, t5;
vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
vector signed int sumdiffs;
uint8_t *pix3 = pix2 + stride;
/* Due to the fact that pix3 = pix2 + stride, 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. */
vector unsigned char pix2l = vec_ld(0, pix2);
vector unsigned char pix2r = vec_ld(15, pix2);
vector unsigned char 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 += stride;
pix2v = pix3v;
pix3 += stride;
}
/* 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(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
ptrdiff_t stride, int h)
{
int i, s = 0;
uint8_t *pix3 = pix2 + stride;
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 pix1v, pix3v, pix3iv;
vector unsigned short pix3lv, pix3hv, pix3ilv, pix3ihv;
vector unsigned short avghv, avglv;
vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
vector signed int sumdiffs;
/* Due to the fact that pix3 = pix2 + stride, 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. */
vector unsigned char pix2l = vec_ld(0, pix2);
vector unsigned char pix2r = vec_ld(16, pix2);
vector unsigned char pix2v = vec_perm(pix2l, pix2r, perm1);
vector unsigned char pix2iv = vec_perm(pix2l, pix2r, perm2);
vector unsigned short pix2hv =
(vector unsigned short) vec_mergeh(zero, pix2v);
vector unsigned short pix2lv =
(vector unsigned short) vec_mergel(zero, pix2v);
vector unsigned short pix2ihv =
(vector unsigned short) vec_mergeh(zero, pix2iv);
vector unsigned short pix2ilv =
(vector unsigned short) vec_mergel(zero, pix2iv);
vector unsigned short t1 = vec_add(pix2hv, pix2ihv);
vector unsigned short t2 = vec_add(pix2lv, pix2ilv);
vector unsigned short t3, t4;
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 += stride;
pix3 += stride;
/* 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(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
ptrdiff_t stride, int h)
{
int i, s;
const vector unsigned int zero =
(const vector unsigned int) vec_splat_u32(0);
vector unsigned char perm = vec_lvsl(0, pix2);
vector unsigned int sad = (vector unsigned int) vec_splat_u32(0);
vector signed int sumdiffs;
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);
vector unsigned char t1 = vec_ld(0, pix1);
vector unsigned char t2 = vec_perm(pix2l, pix2r, perm);
/* Calculate a sum of abs differences vector. */
vector unsigned char t3 = vec_max(t1, t2);
vector unsigned char t4 = vec_min(t1, t2);
vector unsigned char t5 = vec_sub(t3, t4);
/* Add each 4 pixel group together and put 4 results into sad. */
sad = vec_sum4s(t5, sad);
pix1 += stride;
pix2 += stride;
}
/* 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(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
ptrdiff_t stride, int h)
{
int i, 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 int sad = (vector unsigned int) vec_splat_u32(0);
vector signed int sumdiffs;
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);
vector unsigned char t1 = vec_and(vec_perm(pix1l, pix1r, perm1),
permclear);
vector unsigned char t2 = vec_and(vec_perm(pix2l, pix2r, perm2),
permclear);
/* Calculate a sum of abs differences vector. */
vector unsigned char t3 = vec_max(t1, t2);
vector unsigned char t4 = vec_min(t1, t2);
vector unsigned char t5 = vec_sub(t3, t4);
/* Add each 4 pixel group together and put 4 results into sad. */
sad = vec_sum4s(t5, sad);
pix1 += stride;
pix2 += stride;
}
/* 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;
}
/* Sum of Squared Errors for an 8x8 block, AltiVec-enhanced.
* It's the sad8_altivec code above w/ squaring added. */
static int sse8_altivec(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
ptrdiff_t stride, int h)
{
int i, 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 int sum = (vector unsigned int) vec_splat_u32(0);
vector signed int sumsqr;
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);
vector unsigned char t1 = vec_and(vec_perm(pix1l, pix1r, perm1),
permclear);
vector unsigned char 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. */
vector unsigned char t3 = vec_max(t1, t2);
vector unsigned char t4 = vec_min(t1, t2);
vector unsigned char t5 = vec_sub(t3, t4);
/* Square the values and add them to our sum. */
sum = vec_msum(t5, t5, sum);
pix1 += stride;
pix2 += stride;
}
/* 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(MpegEncContext *v, uint8_t *pix1, uint8_t *pix2,
ptrdiff_t stride, int h)
{
int i, s;
const vector unsigned int zero =
(const vector unsigned int) vec_splat_u32(0);
vector unsigned char perm = vec_lvsl(0, pix2);
vector unsigned int sum = (vector unsigned int) vec_splat_u32(0);
vector signed int sumsqr;
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);
vector unsigned char t1 = vec_ld(0, pix1);
vector unsigned char 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. */
vector unsigned char t3 = vec_max(t1, t2);
vector unsigned char t4 = vec_min(t1, t2);
vector unsigned char t5 = vec_sub(t3, t4);
/* Square the values and add them to our sum. */
sum = vec_msum(t5, t5, sum);
pix1 += stride;
pix2 += stride;
}
/* 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 hadamard8_diff8x8_altivec(MpegEncContext *s, uint8_t *dst,
uint8_t *src, ptrdiff_t 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 = vec_ld(stride * i, src); \
register vector unsigned char src2 = vec_ld(stride * i + 15, src); \
register vector unsigned char srcO = \
vec_perm(src1, src2, vec_lvsl(stride * i, src)); \
register vector unsigned char dst1 = vec_ld(stride * i, dst); \
register vector unsigned char dst2 = vec_ld(stride * i + 15, dst); \
register vector unsigned char 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. */ \
register vector signed short srcV = \
(vector signed short) vec_mergeh((vector signed char) vzero, \
(vector signed char) srcO); \
register vector signed short dstV = \
(vector signed short) vec_mergeh((vector signed char) vzero, \
(vector signed char) dstO); \
\
/* subtractions inside the first butterfly */ \
register vector signed short but0 = vec_sub(srcV, dstV); \
register vector signed short op1 = vec_perm(but0, but0, perm1); \
register vector signed short but1 = vec_mladd(but0, vprod1, op1); \
register vector signed short op2 = vec_perm(but1, but1, perm2); \
register vector signed short but2 = vec_mladd(but1, vprod2, op2); \
register vector signed short 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
* gives the compiler more room 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 includes hand-made register
* allocation. It's not clean, but on a 7450 the resulting code is much faster
* (best case falls 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% fewer 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 *s, uint8_t *dst,
uint8_t *src, ptrdiff_t 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") = \
vec_ld(stride * i, src); \
register vector unsigned char src2 __asm__ ("v23") = \
vec_ld(stride * i + 16, src); \
register vector unsigned char srcO __asm__ ("v22") = \
vec_perm(src1, src2, vec_lvsl(stride * i, src)); \
register vector unsigned char dst1 __asm__ ("v24") = \
vec_ld(stride * i, dst); \
register vector unsigned char dst2 __asm__ ("v25") = \
vec_ld(stride * i + 16, dst); \
register vector unsigned char dstO __asm__ ("v23") = \
vec_perm(dst1, dst2, vec_lvsl(stride * i, dst)); \
\
/* Promote the unsigned chars to signed shorts. */ \
register vector signed short srcV __asm__ ("v24") = \
(vector signed short) vec_mergeh((vector signed char) vzero, \
(vector signed char) srcO); \
register vector signed short dstV __asm__ ("v25") = \
(vector signed short) vec_mergeh((vector signed char) vzero, \
(vector signed char) dstO); \
register vector signed short srcW __asm__ ("v26") = \
(vector signed short) vec_mergel((vector signed char) vzero, \
(vector signed char) srcO); \
register vector signed short dstW __asm__ ("v27") = \
(vector signed short) vec_mergel((vector signed char) vzero, \
(vector signed char) dstO); \
\
/* subtractions inside the first butterfly */ \
register vector signed short but0 __asm__ ("v28") = \
vec_sub(srcV, dstV); \
register vector signed short but0S __asm__ ("v29") = \
vec_sub(srcW, dstW); \
register vector signed short op1 __asm__ ("v30") = \
vec_perm(but0, but0, perm1); \
register vector signed short but1 __asm__ ("v22") = \
vec_mladd(but0, vprod1, op1); \
register vector signed short op1S __asm__ ("v23") = \
vec_perm(but0S, but0S, perm1); \
register vector signed short but1S __asm__ ("v24") = \
vec_mladd(but0S, vprod1, op1S); \
register vector signed short op2 __asm__ ("v25") = \
vec_perm(but1, but1, perm2); \
register vector signed short but2 __asm__ ("v26") = \
vec_mladd(but1, vprod2, op2); \
register vector signed short op2S __asm__ ("v27") = \
vec_perm(but1S, but1S, perm2); \
register vector signed short but2S __asm__ ("v28") = \
vec_mladd(but1S, vprod2, op2S); \
register vector signed short op3 __asm__ ("v29") = \
vec_perm(but2, but2, perm3); \
register vector signed short op3S __asm__ ("v30") = \
vec_perm(but2S, but2S, perm3); \
res1 = vec_mladd(but2, vprod3, op3); \
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 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);
register vector signed short line0S = vec_add(temp0S, temp1S);
register vector signed short line1S = vec_sub(temp0S, temp1S);
register vector signed short line2S = vec_add(temp2S, temp3S);
register vector signed short line3S = vec_sub(temp2S, temp3S);
register vector signed short line4S = vec_add(temp4S, temp5S);
register vector signed short line5S = vec_sub(temp4S, temp5S);
register vector signed short line6S = vec_add(temp6S, temp7S);
register vector signed short line7S = vec_sub(temp6S, temp7S);
register vector signed short line0BS = vec_add(line0S, line2S);
register vector signed short line2BS = vec_sub(line0S, line2S);
register vector signed short line1BS = vec_add(line1S, line3S);
register vector signed short line3BS = vec_sub(line1S, line3S);
register vector signed short line4BS = vec_add(line4S, line6S);
register vector signed short line6BS = vec_sub(line4S, line6S);
register vector signed short line5BS = vec_add(line5S, line7S);
register vector signed short line7BS = vec_sub(line5S, line7S);
register vector signed short line0CS = vec_add(line0BS, line4BS);
register vector signed short line4CS = vec_sub(line0BS, line4BS);
register vector signed short line1CS = vec_add(line1BS, line5BS);
register vector signed short line5CS = vec_sub(line1BS, line5BS);
register vector signed short line2CS = vec_add(line2BS, line6BS);
register vector signed short line6CS = vec_sub(line2BS, line6BS);
register vector signed short line3CS = vec_add(line3BS, line7BS);
register vector signed short line7CS = vec_sub(line3BS, line7BS);
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_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 *s, uint8_t *dst,
uint8_t *src, ptrdiff_t stride, int h)
{
int 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;
}
#endif /* HAVE_ALTIVEC */
av_cold void ff_me_cmp_init_ppc(MECmpContext *c, AVCodecContext *avctx)
{
#if HAVE_ALTIVEC && HAVE_BIGENDIAN
if (!PPC_ALTIVEC(av_get_cpu_flags()))
return;
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->sse[0] = sse16_altivec;
c->sse[1] = sse8_altivec;
c->hadamard8_diff[0] = hadamard8_diff16_altivec;
c->hadamard8_diff[1] = hadamard8_diff8x8_altivec;
#endif /* HAVE_ALTIVEC */
}
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