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FFmpeg/libavcodec/ppc/dsputil_altivec.c
Luca Barbato 832e6e9071 avoid possible segfault situations 
Originally committed as revision 5895 to svn://svn.ffmpeg.org/ffmpeg/trunk
2006-08-02 21:37:38 +00:00

1810 lines
66 KiB
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 library 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 of the License, or (at your option) any later version.
*
* This library 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 this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "../dsputil.h"
#include "gcc_fixes.h"
#include "dsputil_altivec.h"
#ifdef CONFIG_DARWIN
#include <sys/sysctl.h>
#else /* CONFIG_DARWIN */
#ifdef __AMIGAOS4__
#include <exec/exec.h>
#include <interfaces/exec.h>
#include <proto/exec.h>
#else /* __AMIGAOS4__ */
#include <signal.h>
#include <setjmp.h>
static sigjmp_buf jmpbuf;
static volatile sig_atomic_t canjump = 0;
static void sigill_handler (int sig)
{
if (!canjump) {
signal (sig, SIG_DFL);
raise (sig);
}
canjump = 0;
siglongjmp (jmpbuf, 1);
}
#endif /* CONFIG_DARWIN */
#endif /* __AMIGAOS4__ */
int sad16_x2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s __attribute__((aligned(16)));
const_vector unsigned char zero = (const_vector unsigned char)vec_splat_u8(0);
vector unsigned char *tv;
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]
*/
tv = (vector unsigned char *) pix1;
pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
tv = (vector unsigned char *) &pix2[0];
pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
tv = (vector unsigned char *) &pix2[1];
pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));
/* 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;
}
int sad16_y2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s __attribute__((aligned(16)));
const_vector unsigned char zero = (const_vector unsigned char)vec_splat_u8(0);
vector unsigned char *tv;
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
*/
tv = (vector unsigned char *) &pix2[0];
pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
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]
*/
tv = (vector unsigned char *) pix1;
pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
tv = (vector unsigned char *) &pix3[0];
pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));
/* 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;
}
int sad16_xy2_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s __attribute__((aligned(16)));
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 *tv, avgv, t5;
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
*/
tv = (vector unsigned char *) &pix2[0];
pix2v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[0]));
tv = (vector unsigned char *) &pix2[1];
pix2iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix2[1]));
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]
*/
tv = (vector unsigned char *) pix1;
pix1v = vec_perm(tv[0], tv[1], vec_lvsl(0, pix1));
tv = (vector unsigned char *) &pix3[0];
pix3v = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[0]));
tv = (vector unsigned char *) &pix3[1];
pix3iv = vec_perm(tv[0], tv[1], vec_lvsl(0, &pix3[1]));
/*
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;
}
int sad16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s __attribute__((aligned(16)));
const_vector unsigned int zero = (const_vector unsigned int)vec_splat_u32(0);
vector unsigned char perm1, perm2, *pix1v, *pix2v;
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 */
perm1 = vec_lvsl(0, pix1);
pix1v = (vector unsigned char *) pix1;
perm2 = vec_lvsl(0, pix2);
pix2v = (vector unsigned char *) pix2;
t1 = vec_perm(pix1v[0], pix1v[1], perm1);
t2 = vec_perm(pix2v[0], pix2v[1], perm2);
/* 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;
}
int sad8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s __attribute__((aligned(16)));
const_vector unsigned int zero = (const_vector unsigned int)vec_splat_u32(0);
vector unsigned char perm1, perm2, permclear, *pix1v, *pix2v;
vector unsigned char t1, t2, t3,t4, t5;
vector unsigned int sad;
vector signed int sumdiffs;
sad = (vector unsigned int)vec_splat_u32(0);
permclear = (vector unsigned char)AVV(255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0);
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. */
perm1 = vec_lvsl(0, pix1);
pix1v = (vector unsigned char *) pix1;
perm2 = vec_lvsl(0, pix2);
pix2v = (vector unsigned char *) pix2;
t1 = vec_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);
t2 = vec_and(vec_perm(pix2v[0], pix2v[1], 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;
}
int pix_norm1_altivec(uint8_t *pix, int line_size)
{
int i;
int s __attribute__((aligned(16)));
const_vector unsigned int zero = (const_vector unsigned int)vec_splat_u32(0);
vector unsigned char *tv;
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 */
tv = (vector unsigned char *) pix;
pixv = vec_perm(tv[0], tv[1], vec_lvsl(0, pix));
/* 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.
*/
int sse8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s __attribute__((aligned(16)));
const_vector unsigned int zero = (const_vector unsigned int)vec_splat_u32(0);
vector unsigned char perm1, perm2, permclear, *pix1v, *pix2v;
vector unsigned char t1, t2, t3,t4, t5;
vector unsigned int sum;
vector signed int sumsqr;
sum = (vector unsigned int)vec_splat_u32(0);
permclear = (vector unsigned char)AVV(255,255,255,255,255,255,255,255,0,0,0,0,0,0,0,0);
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. */
perm1 = vec_lvsl(0, pix1);
pix1v = (vector unsigned char *) pix1;
perm2 = vec_lvsl(0, pix2);
pix2v = (vector unsigned char *) pix2;
t1 = vec_and(vec_perm(pix1v[0], pix1v[1], perm1), permclear);
t2 = vec_and(vec_perm(pix2v[0], pix2v[1], 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.
*/
int sse16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, int line_size, int h)
{
int i;
int s __attribute__((aligned(16)));
const_vector unsigned int zero = (const_vector unsigned int)vec_splat_u32(0);
vector unsigned char perm1, perm2, *pix1v, *pix2v;
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 */
perm1 = vec_lvsl(0, pix1);
pix1v = (vector unsigned char *) pix1;
perm2 = vec_lvsl(0, pix2);
pix2v = (vector unsigned char *) pix2;
t1 = vec_perm(pix1v[0], pix1v[1], perm1);
t2 = vec_perm(pix2v[0], pix2v[1], perm2);
/*
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;
}
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, *pixv;
vector unsigned char t1;
vector unsigned int sad;
vector signed int sumdiffs;
int i;
int s __attribute__((aligned(16)));
sad = (vector unsigned int)vec_splat_u32(0);
for (i = 0; i < 16; i++) {
/* Read the potentially unaligned 16 pixels into t1 */
perm = vec_lvsl(0, pix);
pixv = (vector unsigned char *) pix;
t1 = vec_perm(pixv[0], pixv[1], 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;
}
void get_pixels_altivec(DCTELEM *restrict block, const uint8_t *pixels, int line_size)
{
int i;
vector unsigned char perm, bytes, *pixv;
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.
perm = vec_lvsl(0, pixels);
pixv = (vector unsigned char *) pixels;
bytes = vec_perm(pixv[0], pixv[1], 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;
}
}
void diff_pixels_altivec(DCTELEM *restrict block, const uint8_t *s1,
const uint8_t *s2, int stride)
{
int i;
vector unsigned char perm, bytes, *pixv;
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.
perm = vec_lvsl(0, s1);
pixv = (vector unsigned char *) s1;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts1 = (vector signed short)vec_mergeh(zero, bytes);
// Do the same for the second block of pixels
perm = vec_lvsl(0, s2);
pixv = (vector unsigned char *) s2;
bytes = vec_perm(pixv[0], pixv[1], perm);
// 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.
perm = vec_lvsl(0, s1);
pixv = (vector unsigned char *) s1;
bytes = vec_perm(pixv[0], pixv[1], perm);
// convert the bytes into shorts
shorts1 = (vector signed short)vec_mergeh(zero, bytes);
// Do the same for the second block of pixels
perm = vec_lvsl(0, s2);
pixv = (vector unsigned char *) s2;
bytes = vec_perm(pixv[0], pixv[1], perm);
// 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;
}
}
void add_bytes_altivec(uint8_t *dst, uint8_t *src, int w) {
#ifdef ALTIVEC_USE_REFERENCE_C_CODE
int i;
for(i=0; i+7<w; i++){
dst[i+0] += src[i+0];
dst[i+1] += src[i+1];
dst[i+2] += src[i+2];
dst[i+3] += src[i+3];
dst[i+4] += src[i+4];
dst[i+5] += src[i+5];
dst[i+6] += src[i+6];
dst[i+7] += src[i+7];
}
for(; i<w; i++)
dst[i+0] += src[i+0];
#else /* ALTIVEC_USE_REFERENCE_C_CODE */
register int i;
register vector unsigned char vdst, vsrc;
/* dst and src are 16 bytes-aligned (guaranteed) */
for(i = 0 ; (i + 15) < w ; i++)
{
vdst = vec_ld(i << 4, (unsigned char*)dst);
vsrc = vec_ld(i << 4, (unsigned char*)src);
vdst = vec_add(vsrc, vdst);
vec_st(vdst, i << 4, (unsigned char*)dst);
}
/* if w is not a multiple of 16 */
for (; (i < w) ; i++)
{
dst[i] = src[i];
}
#endif /* ALTIVEC_USE_REFERENCE_C_CODE */
}
/* next one assumes that ((line_size % 16) == 0) */
void put_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
POWERPC_PERF_DECLARE(altivec_put_pixels16_num, 1);
#ifdef ALTIVEC_USE_REFERENCE_C_CODE
int i;
POWERPC_PERF_START_COUNT(altivec_put_pixels16_num, 1);
for(i=0; i<h; i++) {
*((uint32_t*)(block)) = LD32(pixels);
*((uint32_t*)(block+4)) = LD32(pixels+4);
*((uint32_t*)(block+8)) = LD32(pixels+8);
*((uint32_t*)(block+12)) = LD32(pixels+12);
pixels+=line_size;
block +=line_size;
}
POWERPC_PERF_STOP_COUNT(altivec_put_pixels16_num, 1);
#else /* ALTIVEC_USE_REFERENCE_C_CODE */
register vector unsigned char pixelsv1, pixelsv2;
register vector unsigned char pixelsv1B, pixelsv2B;
register vector unsigned char pixelsv1C, pixelsv2C;
register vector unsigned char pixelsv1D, pixelsv2D;
register vector unsigned char perm = vec_lvsl(0, pixels);
int i;
register int line_size_2 = line_size << 1;
register int line_size_3 = line_size + line_size_2;
register int line_size_4 = line_size << 2;
POWERPC_PERF_START_COUNT(altivec_put_pixels16_num, 1);
// hand-unrolling the loop by 4 gains about 15%
// mininum execution time goes from 74 to 60 cycles
// it's faster than -funroll-loops, but using
// -funroll-loops w/ this is bad - 74 cycles again.
// all this is on a 7450, tuning for the 7450
#if 0
for(i=0; i<h; i++) {
pixelsv1 = vec_ld(0, (unsigned char*)pixels);
pixelsv2 = vec_ld(16, (unsigned char*)pixels);
vec_st(vec_perm(pixelsv1, pixelsv2, perm),
0, (unsigned char*)block);
pixels+=line_size;
block +=line_size;
}
#else
for(i=0; i<h; i+=4) {
pixelsv1 = vec_ld(0, (unsigned char*)pixels);
pixelsv2 = vec_ld(15, (unsigned char*)pixels);
pixelsv1B = vec_ld(line_size, (unsigned char*)pixels);
pixelsv2B = vec_ld(15 + line_size, (unsigned char*)pixels);
pixelsv1C = vec_ld(line_size_2, (unsigned char*)pixels);
pixelsv2C = vec_ld(15 + line_size_2, (unsigned char*)pixels);
pixelsv1D = vec_ld(line_size_3, (unsigned char*)pixels);
pixelsv2D = vec_ld(15 + line_size_3, (unsigned char*)pixels);
vec_st(vec_perm(pixelsv1, pixelsv2, perm),
0, (unsigned char*)block);
vec_st(vec_perm(pixelsv1B, pixelsv2B, perm),
line_size, (unsigned char*)block);
vec_st(vec_perm(pixelsv1C, pixelsv2C, perm),
line_size_2, (unsigned char*)block);
vec_st(vec_perm(pixelsv1D, pixelsv2D, perm),
line_size_3, (unsigned char*)block);
pixels+=line_size_4;
block +=line_size_4;
}
#endif
POWERPC_PERF_STOP_COUNT(altivec_put_pixels16_num, 1);
#endif /* ALTIVEC_USE_REFERENCE_C_CODE */
}
/* next one assumes that ((line_size % 16) == 0) */
#define op_avg(a,b) a = ( ((a)|(b)) - ((((a)^(b))&0xFEFEFEFEUL)>>1) )
void avg_pixels16_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
POWERPC_PERF_DECLARE(altivec_avg_pixels16_num, 1);
#ifdef ALTIVEC_USE_REFERENCE_C_CODE
int i;
POWERPC_PERF_START_COUNT(altivec_avg_pixels16_num, 1);
for(i=0; i<h; i++) {
op_avg(*((uint32_t*)(block)),LD32(pixels));
op_avg(*((uint32_t*)(block+4)),LD32(pixels+4));
op_avg(*((uint32_t*)(block+8)),LD32(pixels+8));
op_avg(*((uint32_t*)(block+12)),LD32(pixels+12));
pixels+=line_size;
block +=line_size;
}
POWERPC_PERF_STOP_COUNT(altivec_avg_pixels16_num, 1);
#else /* ALTIVEC_USE_REFERENCE_C_CODE */
register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;
register vector unsigned char perm = vec_lvsl(0, pixels);
int i;
POWERPC_PERF_START_COUNT(altivec_avg_pixels16_num, 1);
for(i=0; i<h; i++) {
pixelsv1 = vec_ld(0, (unsigned char*)pixels);
pixelsv2 = vec_ld(16, (unsigned char*)pixels);
blockv = vec_ld(0, block);
pixelsv = vec_perm(pixelsv1, pixelsv2, perm);
blockv = vec_avg(blockv,pixelsv);
vec_st(blockv, 0, (unsigned char*)block);
pixels+=line_size;
block +=line_size;
}
POWERPC_PERF_STOP_COUNT(altivec_avg_pixels16_num, 1);
#endif /* ALTIVEC_USE_REFERENCE_C_CODE */
}
/* next one assumes that ((line_size % 8) == 0) */
void avg_pixels8_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
{
POWERPC_PERF_DECLARE(altivec_avg_pixels8_num, 1);
#ifdef ALTIVEC_USE_REFERENCE_C_CODE
int i;
POWERPC_PERF_START_COUNT(altivec_avg_pixels8_num, 1);
for (i = 0; i < h; i++) {
*((uint32_t *) (block)) =
(((*((uint32_t *) (block))) |
((((const struct unaligned_32 *) (pixels))->l))) -
((((*((uint32_t *) (block))) ^
((((const struct unaligned_32 *) (pixels))->
l))) & 0xFEFEFEFEUL) >> 1));
*((uint32_t *) (block + 4)) =
(((*((uint32_t *) (block + 4))) |
((((const struct unaligned_32 *) (pixels + 4))->l))) -
((((*((uint32_t *) (block + 4))) ^
((((const struct unaligned_32 *) (pixels +
4))->
l))) & 0xFEFEFEFEUL) >> 1));
pixels += line_size;
block += line_size;
}
POWERPC_PERF_STOP_COUNT(altivec_avg_pixels8_num, 1);
#else /* ALTIVEC_USE_REFERENCE_C_CODE */
register vector unsigned char pixelsv1, pixelsv2, pixelsv, blockv;
int i;
POWERPC_PERF_START_COUNT(altivec_avg_pixels8_num, 1);
for (i = 0; i < h; i++) {
/*
block is 8 bytes-aligned, so we're either in the
left block (16 bytes-aligned) or in the right block (not)
*/
int rightside = ((unsigned long)block & 0x0000000F);
blockv = vec_ld(0, block);
pixelsv1 = vec_ld(0, (unsigned char*)pixels);
pixelsv2 = vec_ld(16, (unsigned char*)pixels);
pixelsv = vec_perm(pixelsv1, pixelsv2, vec_lvsl(0, pixels));
if (rightside)
{
pixelsv = vec_perm(blockv, pixelsv, vcprm(0,1,s0,s1));
}
else
{
pixelsv = vec_perm(blockv, pixelsv, vcprm(s0,s1,2,3));
}
blockv = vec_avg(blockv, pixelsv);
vec_st(blockv, 0, block);
pixels += line_size;
block += line_size;
}
POWERPC_PERF_STOP_COUNT(altivec_avg_pixels8_num, 1);
#endif /* ALTIVEC_USE_REFERENCE_C_CODE */
}
/* next one assumes that ((line_size % 8) == 0) */
void put_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
POWERPC_PERF_DECLARE(altivec_put_pixels8_xy2_num, 1);
#ifdef ALTIVEC_USE_REFERENCE_C_CODE
int j;
POWERPC_PERF_START_COUNT(altivec_put_pixels8_xy2_num, 1);
for (j = 0; j < 2; j++) {
int i;
const uint32_t a = (((const struct unaligned_32 *) (pixels))->l);
const uint32_t b =
(((const struct unaligned_32 *) (pixels + 1))->l);
uint32_t l0 =
(a & 0x03030303UL) + (b & 0x03030303UL) + 0x02020202UL;
uint32_t h0 =
((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
uint32_t l1, h1;
pixels += line_size;
for (i = 0; i < h; i += 2) {
uint32_t a = (((const struct unaligned_32 *) (pixels))->l);
uint32_t b = (((const struct unaligned_32 *) (pixels + 1))->l);
l1 = (a & 0x03030303UL) + (b & 0x03030303UL);
h1 = ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
*((uint32_t *) block) =
h0 + h1 + (((l0 + l1) >> 2) & 0x0F0F0F0FUL);
pixels += line_size;
block += line_size;
a = (((const struct unaligned_32 *) (pixels))->l);
b = (((const struct unaligned_32 *) (pixels + 1))->l);
l0 = (a & 0x03030303UL) + (b & 0x03030303UL) + 0x02020202UL;
h0 = ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
*((uint32_t *) block) =
h0 + h1 + (((l0 + l1) >> 2) & 0x0F0F0F0FUL);
pixels += line_size;
block += line_size;
} pixels += 4 - line_size * (h + 1);
block += 4 - line_size * h;
}
POWERPC_PERF_STOP_COUNT(altivec_put_pixels8_xy2_num, 1);
#else /* ALTIVEC_USE_REFERENCE_C_CODE */
register int i;
register vector unsigned char
pixelsv1, pixelsv2,
pixelsavg;
register vector unsigned char
blockv, temp1, temp2;
register vector unsigned short
pixelssum1, pixelssum2, temp3;
register const_vector unsigned char vczero = (const_vector unsigned char)vec_splat_u8(0);
register const_vector unsigned short vctwo = (const_vector unsigned short)vec_splat_u16(2);
temp1 = vec_ld(0, pixels);
temp2 = vec_ld(16, pixels);
pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
if ((((unsigned long)pixels) & 0x0000000F) == 0x0000000F)
{
pixelsv2 = temp2;
}
else
{
pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
}
pixelsv1 = vec_mergeh(vczero, pixelsv1);
pixelsv2 = vec_mergeh(vczero, pixelsv2);
pixelssum1 = vec_add((vector unsigned short)pixelsv1,
(vector unsigned short)pixelsv2);
pixelssum1 = vec_add(pixelssum1, vctwo);
POWERPC_PERF_START_COUNT(altivec_put_pixels8_xy2_num, 1);
for (i = 0; i < h ; i++) {
int rightside = ((unsigned long)block & 0x0000000F);
blockv = vec_ld(0, block);
temp1 = vec_ld(line_size, pixels);
temp2 = vec_ld(line_size + 16, pixels);
pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
if (((((unsigned long)pixels) + line_size) & 0x0000000F) == 0x0000000F)
{
pixelsv2 = temp2;
}
else
{
pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
}
pixelsv1 = vec_mergeh(vczero, pixelsv1);
pixelsv2 = vec_mergeh(vczero, pixelsv2);
pixelssum2 = vec_add((vector unsigned short)pixelsv1,
(vector unsigned short)pixelsv2);
temp3 = vec_add(pixelssum1, pixelssum2);
temp3 = vec_sra(temp3, vctwo);
pixelssum1 = vec_add(pixelssum2, vctwo);
pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
if (rightside)
{
blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
}
else
{
blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
}
vec_st(blockv, 0, block);
block += line_size;
pixels += line_size;
}
POWERPC_PERF_STOP_COUNT(altivec_put_pixels8_xy2_num, 1);
#endif /* ALTIVEC_USE_REFERENCE_C_CODE */
}
/* next one assumes that ((line_size % 8) == 0) */
void put_no_rnd_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
POWERPC_PERF_DECLARE(altivec_put_no_rnd_pixels8_xy2_num, 1);
#ifdef ALTIVEC_USE_REFERENCE_C_CODE
int j;
POWERPC_PERF_START_COUNT(altivec_put_no_rnd_pixels8_xy2_num, 1);
for (j = 0; j < 2; j++) {
int i;
const uint32_t a = (((const struct unaligned_32 *) (pixels))->l);
const uint32_t b =
(((const struct unaligned_32 *) (pixels + 1))->l);
uint32_t l0 =
(a & 0x03030303UL) + (b & 0x03030303UL) + 0x01010101UL;
uint32_t h0 =
((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
uint32_t l1, h1;
pixels += line_size;
for (i = 0; i < h; i += 2) {
uint32_t a = (((const struct unaligned_32 *) (pixels))->l);
uint32_t b = (((const struct unaligned_32 *) (pixels + 1))->l);
l1 = (a & 0x03030303UL) + (b & 0x03030303UL);
h1 = ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
*((uint32_t *) block) =
h0 + h1 + (((l0 + l1) >> 2) & 0x0F0F0F0FUL);
pixels += line_size;
block += line_size;
a = (((const struct unaligned_32 *) (pixels))->l);
b = (((const struct unaligned_32 *) (pixels + 1))->l);
l0 = (a & 0x03030303UL) + (b & 0x03030303UL) + 0x01010101UL;
h0 = ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
*((uint32_t *) block) =
h0 + h1 + (((l0 + l1) >> 2) & 0x0F0F0F0FUL);
pixels += line_size;
block += line_size;
} pixels += 4 - line_size * (h + 1);
block += 4 - line_size * h;
}
POWERPC_PERF_STOP_COUNT(altivec_put_no_rnd_pixels8_xy2_num, 1);
#else /* ALTIVEC_USE_REFERENCE_C_CODE */
register int i;
register vector unsigned char
pixelsv1, pixelsv2,
pixelsavg;
register vector unsigned char
blockv, temp1, temp2;
register vector unsigned short
pixelssum1, pixelssum2, temp3;
register const_vector unsigned char vczero = (const_vector unsigned char)vec_splat_u8(0);
register const_vector unsigned short vcone = (const_vector unsigned short)vec_splat_u16(1);
register const_vector unsigned short vctwo = (const_vector unsigned short)vec_splat_u16(2);
temp1 = vec_ld(0, pixels);
temp2 = vec_ld(16, pixels);
pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
if ((((unsigned long)pixels) & 0x0000000F) == 0x0000000F)
{
pixelsv2 = temp2;
}
else
{
pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
}
pixelsv1 = vec_mergeh(vczero, pixelsv1);
pixelsv2 = vec_mergeh(vczero, pixelsv2);
pixelssum1 = vec_add((vector unsigned short)pixelsv1,
(vector unsigned short)pixelsv2);
pixelssum1 = vec_add(pixelssum1, vcone);
POWERPC_PERF_START_COUNT(altivec_put_no_rnd_pixels8_xy2_num, 1);
for (i = 0; i < h ; i++) {
int rightside = ((unsigned long)block & 0x0000000F);
blockv = vec_ld(0, block);
temp1 = vec_ld(line_size, pixels);
temp2 = vec_ld(line_size + 16, pixels);
pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
if (((((unsigned long)pixels) + line_size) & 0x0000000F) == 0x0000000F)
{
pixelsv2 = temp2;
}
else
{
pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
}
pixelsv1 = vec_mergeh(vczero, pixelsv1);
pixelsv2 = vec_mergeh(vczero, pixelsv2);
pixelssum2 = vec_add((vector unsigned short)pixelsv1,
(vector unsigned short)pixelsv2);
temp3 = vec_add(pixelssum1, pixelssum2);
temp3 = vec_sra(temp3, vctwo);
pixelssum1 = vec_add(pixelssum2, vcone);
pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
if (rightside)
{
blockv = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
}
else
{
blockv = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
}
vec_st(blockv, 0, block);
block += line_size;
pixels += line_size;
}
POWERPC_PERF_STOP_COUNT(altivec_put_no_rnd_pixels8_xy2_num, 1);
#endif /* ALTIVEC_USE_REFERENCE_C_CODE */
}
/* next one assumes that ((line_size % 16) == 0) */
void put_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
{
POWERPC_PERF_DECLARE(altivec_put_pixels16_xy2_num, 1);
#ifdef ALTIVEC_USE_REFERENCE_C_CODE
int j;
POWERPC_PERF_START_COUNT(altivec_put_pixels16_xy2_num, 1);
for (j = 0; j < 4; j++) {
int i;
const uint32_t a = (((const struct unaligned_32 *) (pixels))->l);
const uint32_t b =
(((const struct unaligned_32 *) (pixels + 1))->l);
uint32_t l0 =
(a & 0x03030303UL) + (b & 0x03030303UL) + 0x02020202UL;
uint32_t h0 =
((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
uint32_t l1, h1;
pixels += line_size;
for (i = 0; i < h; i += 2) {
uint32_t a = (((const struct unaligned_32 *) (pixels))->l);
uint32_t b = (((const struct unaligned_32 *) (pixels + 1))->l);
l1 = (a & 0x03030303UL) + (b & 0x03030303UL);
h1 = ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
*((uint32_t *) block) =
h0 + h1 + (((l0 + l1) >> 2) & 0x0F0F0F0FUL);
pixels += line_size;
block += line_size;
a = (((const struct unaligned_32 *) (pixels))->l);
b = (((const struct unaligned_32 *) (pixels + 1))->l);
l0 = (a & 0x03030303UL) + (b & 0x03030303UL) + 0x02020202UL;
h0 = ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
*((uint32_t *) block) =
h0 + h1 + (((l0 + l1) >> 2) & 0x0F0F0F0FUL);
pixels += line_size;
block += line_size;
} pixels += 4 - line_size * (h + 1);
block += 4 - line_size * h;
}
POWERPC_PERF_STOP_COUNT(altivec_put_pixels16_xy2_num, 1);
#else /* ALTIVEC_USE_REFERENCE_C_CODE */
register int i;
register vector unsigned char
pixelsv1, pixelsv2, pixelsv3, pixelsv4;
register vector unsigned char
blockv, temp1, temp2;
register vector unsigned short
pixelssum1, pixelssum2, temp3,
pixelssum3, pixelssum4, temp4;
register const_vector unsigned char vczero = (const_vector unsigned char)vec_splat_u8(0);
register const_vector unsigned short vctwo = (const_vector unsigned short)vec_splat_u16(2);
POWERPC_PERF_START_COUNT(altivec_put_pixels16_xy2_num, 1);
temp1 = vec_ld(0, pixels);
temp2 = vec_ld(16, pixels);
pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
if ((((unsigned long)pixels) & 0x0000000F) == 0x0000000F)
{
pixelsv2 = temp2;
}
else
{
pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
}
pixelsv3 = vec_mergel(vczero, pixelsv1);
pixelsv4 = vec_mergel(vczero, pixelsv2);
pixelsv1 = vec_mergeh(vczero, pixelsv1);
pixelsv2 = vec_mergeh(vczero, pixelsv2);
pixelssum3 = vec_add((vector unsigned short)pixelsv3,
(vector unsigned short)pixelsv4);
pixelssum3 = vec_add(pixelssum3, vctwo);
pixelssum1 = vec_add((vector unsigned short)pixelsv1,
(vector unsigned short)pixelsv2);
pixelssum1 = vec_add(pixelssum1, vctwo);
for (i = 0; i < h ; i++) {
blockv = vec_ld(0, block);
temp1 = vec_ld(line_size, pixels);
temp2 = vec_ld(line_size + 16, pixels);
pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
if (((((unsigned long)pixels) + line_size) & 0x0000000F) == 0x0000000F)
{
pixelsv2 = temp2;
}
else
{
pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
}
pixelsv3 = vec_mergel(vczero, pixelsv1);
pixelsv4 = vec_mergel(vczero, pixelsv2);
pixelsv1 = vec_mergeh(vczero, pixelsv1);
pixelsv2 = vec_mergeh(vczero, pixelsv2);
pixelssum4 = vec_add((vector unsigned short)pixelsv3,
(vector unsigned short)pixelsv4);
pixelssum2 = vec_add((vector unsigned short)pixelsv1,
(vector unsigned short)pixelsv2);
temp4 = vec_add(pixelssum3, pixelssum4);
temp4 = vec_sra(temp4, vctwo);
temp3 = vec_add(pixelssum1, pixelssum2);
temp3 = vec_sra(temp3, vctwo);
pixelssum3 = vec_add(pixelssum4, vctwo);
pixelssum1 = vec_add(pixelssum2, vctwo);
blockv = vec_packsu(temp3, temp4);
vec_st(blockv, 0, block);
block += line_size;
pixels += line_size;
}
POWERPC_PERF_STOP_COUNT(altivec_put_pixels16_xy2_num, 1);
#endif /* ALTIVEC_USE_REFERENCE_C_CODE */
}
/* next one assumes that ((line_size % 16) == 0) */
void put_no_rnd_pixels16_xy2_altivec(uint8_t * block, const uint8_t * pixels, int line_size, int h)
{
POWERPC_PERF_DECLARE(altivec_put_no_rnd_pixels16_xy2_num, 1);
#ifdef ALTIVEC_USE_REFERENCE_C_CODE
int j;
POWERPC_PERF_START_COUNT(altivec_put_no_rnd_pixels16_xy2_num, 1);
for (j = 0; j < 4; j++) {
int i;
const uint32_t a = (((const struct unaligned_32 *) (pixels))->l);
const uint32_t b =
(((const struct unaligned_32 *) (pixels + 1))->l);
uint32_t l0 =
(a & 0x03030303UL) + (b & 0x03030303UL) + 0x01010101UL;
uint32_t h0 =
((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
uint32_t l1, h1;
pixels += line_size;
for (i = 0; i < h; i += 2) {
uint32_t a = (((const struct unaligned_32 *) (pixels))->l);
uint32_t b = (((const struct unaligned_32 *) (pixels + 1))->l);
l1 = (a & 0x03030303UL) + (b & 0x03030303UL);
h1 = ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
*((uint32_t *) block) =
h0 + h1 + (((l0 + l1) >> 2) & 0x0F0F0F0FUL);
pixels += line_size;
block += line_size;
a = (((const struct unaligned_32 *) (pixels))->l);
b = (((const struct unaligned_32 *) (pixels + 1))->l);
l0 = (a & 0x03030303UL) + (b & 0x03030303UL) + 0x01010101UL;
h0 = ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
*((uint32_t *) block) =
h0 + h1 + (((l0 + l1) >> 2) & 0x0F0F0F0FUL);
pixels += line_size;
block += line_size;
} pixels += 4 - line_size * (h + 1);
block += 4 - line_size * h;
}
POWERPC_PERF_STOP_COUNT(altivec_put_no_rnd_pixels16_xy2_num, 1);
#else /* ALTIVEC_USE_REFERENCE_C_CODE */
register int i;
register vector unsigned char
pixelsv1, pixelsv2, pixelsv3, pixelsv4;
register vector unsigned char
blockv, temp1, temp2;
register vector unsigned short
pixelssum1, pixelssum2, temp3,
pixelssum3, pixelssum4, temp4;
register const_vector unsigned char vczero = (const_vector unsigned char)vec_splat_u8(0);
register const_vector unsigned short vcone = (const_vector unsigned short)vec_splat_u16(1);
register const_vector unsigned short vctwo = (const_vector unsigned short)vec_splat_u16(2);
POWERPC_PERF_START_COUNT(altivec_put_no_rnd_pixels16_xy2_num, 1);
temp1 = vec_ld(0, pixels);
temp2 = vec_ld(16, pixels);
pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
if ((((unsigned long)pixels) & 0x0000000F) == 0x0000000F)
{
pixelsv2 = temp2;
}
else
{
pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
}
pixelsv3 = vec_mergel(vczero, pixelsv1);
pixelsv4 = vec_mergel(vczero, pixelsv2);
pixelsv1 = vec_mergeh(vczero, pixelsv1);
pixelsv2 = vec_mergeh(vczero, pixelsv2);
pixelssum3 = vec_add((vector unsigned short)pixelsv3,
(vector unsigned short)pixelsv4);
pixelssum3 = vec_add(pixelssum3, vcone);
pixelssum1 = vec_add((vector unsigned short)pixelsv1,
(vector unsigned short)pixelsv2);
pixelssum1 = vec_add(pixelssum1, vcone);
for (i = 0; i < h ; i++) {
blockv = vec_ld(0, block);
temp1 = vec_ld(line_size, pixels);
temp2 = vec_ld(line_size + 16, pixels);
pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
if (((((unsigned long)pixels) + line_size) & 0x0000000F) == 0x0000000F)
{
pixelsv2 = temp2;
}
else
{
pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
}
pixelsv3 = vec_mergel(vczero, pixelsv1);
pixelsv4 = vec_mergel(vczero, pixelsv2);
pixelsv1 = vec_mergeh(vczero, pixelsv1);
pixelsv2 = vec_mergeh(vczero, pixelsv2);
pixelssum4 = vec_add((vector unsigned short)pixelsv3,
(vector unsigned short)pixelsv4);
pixelssum2 = vec_add((vector unsigned short)pixelsv1,
(vector unsigned short)pixelsv2);
temp4 = vec_add(pixelssum3, pixelssum4);
temp4 = vec_sra(temp4, vctwo);
temp3 = vec_add(pixelssum1, pixelssum2);
temp3 = vec_sra(temp3, vctwo);
pixelssum3 = vec_add(pixelssum4, vcone);
pixelssum1 = vec_add(pixelssum2, vcone);
blockv = vec_packsu(temp3, temp4);
vec_st(blockv, 0, block);
block += line_size;
pixels += line_size;
}
POWERPC_PERF_STOP_COUNT(altivec_put_no_rnd_pixels16_xy2_num, 1);
#endif /* ALTIVEC_USE_REFERENCE_C_CODE */
}
int hadamard8_diff8x8_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){
POWERPC_PERF_DECLARE(altivec_hadamard8_diff8x8_num, 1);
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;
POWERPC_PERF_START_COUNT(altivec_hadamard8_diff8x8_num, 1);
{
register const_vector signed short vprod1 = (const_vector signed short)AVV( 1,-1, 1,-1, 1,-1, 1,-1);
register const_vector signed short vprod2 = (const_vector signed short)AVV( 1, 1,-1,-1, 1, 1,-1,-1);
register const_vector signed short vprod3 = (const_vector signed short)AVV( 1, 1, 1, 1,-1,-1,-1,-1);
register const_vector unsigned char perm1 = (const_vector unsigned char)
AVV(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)
AVV(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)
AVV(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); \
if ((((stride * i) + (unsigned long)src) & 0x0000000F) > 8) \
src2 = vec_ld((stride * i) + 16, src); \
srcO = vec_perm(src1, src2, vec_lvsl(stride * i, src)); \
dst1 = vec_ld(stride * i, dst); \
if ((((stride * i) + (unsigned long)dst) & 0x0000000F) > 8) \
dst2 = vec_ld((stride * i) + 16, 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); \
/* substractions 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);
}
POWERPC_PERF_STOP_COUNT(altivec_hadamard8_diff8x8_num, 1);
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 (arount 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 REG_v(v0),
temp1 REG_v(v1),
temp2 REG_v(v2),
temp3 REG_v(v3),
temp4 REG_v(v4),
temp5 REG_v(v5),
temp6 REG_v(v6),
temp7 REG_v(v7);
register vector signed short
temp0S REG_v(v8),
temp1S REG_v(v9),
temp2S REG_v(v10),
temp3S REG_v(v11),
temp4S REG_v(v12),
temp5S REG_v(v13),
temp6S REG_v(v14),
temp7S REG_v(v15);
register const_vector unsigned char vzero REG_v(v31)= (const_vector unsigned char)vec_splat_u8(0);
{
register const_vector signed short vprod1 REG_v(v16)= (const_vector signed short)AVV( 1,-1, 1,-1, 1,-1, 1,-1);
register const_vector signed short vprod2 REG_v(v17)= (const_vector signed short)AVV( 1, 1,-1,-1, 1, 1,-1,-1);
register const_vector signed short vprod3 REG_v(v18)= (const_vector signed short)AVV( 1, 1, 1, 1,-1,-1,-1,-1);
register const_vector unsigned char perm1 REG_v(v19)= (const_vector unsigned char)
AVV(0x02, 0x03, 0x00, 0x01,
0x06, 0x07, 0x04, 0x05,
0x0A, 0x0B, 0x08, 0x09,
0x0E, 0x0F, 0x0C, 0x0D);
register const_vector unsigned char perm2 REG_v(v20)= (const_vector unsigned char)
AVV(0x04, 0x05, 0x06, 0x07,
0x00, 0x01, 0x02, 0x03,
0x0C, 0x0D, 0x0E, 0x0F,
0x08, 0x09, 0x0A, 0x0B);
register const_vector unsigned char perm3 REG_v(v21)= (const_vector unsigned char)
AVV(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 REG_v(v22), \
src2 REG_v(v23), \
dst1 REG_v(v24), \
dst2 REG_v(v25), \
srcO REG_v(v22), \
dstO REG_v(v23); \
\
register vector signed short srcV REG_v(v24), \
dstV REG_v(v25), \
srcW REG_v(v26), \
dstW REG_v(v27), \
but0 REG_v(v28), \
but0S REG_v(v29), \
op1 REG_v(v30), \
but1 REG_v(v22), \
op1S REG_v(v23), \
but1S REG_v(v24), \
op2 REG_v(v25), \
but2 REG_v(v26), \
op2S REG_v(v27), \
but2S REG_v(v28), \
op3 REG_v(v29), \
op3S REG_v(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); \
/* substractions 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;
}
int hadamard8_diff16_altivec(/*MpegEncContext*/ void *s, uint8_t *dst, uint8_t *src, int stride, int h){
POWERPC_PERF_DECLARE(altivec_hadamard8_diff16_num, 1);
int score;
POWERPC_PERF_START_COUNT(altivec_hadamard8_diff16_num, 1);
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);
}
POWERPC_PERF_STOP_COUNT(altivec_hadamard8_diff16_num, 1);
return score;
}
int has_altivec(void)
{
#ifdef __AMIGAOS4__
ULONG result = 0;
extern struct ExecIFace *IExec;
IExec->GetCPUInfoTags(GCIT_VectorUnit, &result, TAG_DONE);
if (result == VECTORTYPE_ALTIVEC) return 1;
return 0;
#else /* __AMIGAOS4__ */
#ifdef 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);
#else /* CONFIG_DARWIN */
/* no Darwin, do it the brute-force way */
/* this is borrowed from the libmpeg2 library */
{
signal (SIGILL, sigill_handler);
if (sigsetjmp (jmpbuf, 1)) {
signal (SIGILL, SIG_DFL);
} else {
canjump = 1;
asm volatile ("mtspr 256, %0\n\t"
"vand %%v0, %%v0, %%v0"
:
: "r" (-1));
signal (SIGILL, SIG_DFL);
return 1;
}
}
#endif /* CONFIG_DARWIN */
return 0;
#endif /* __AMIGAOS4__ */
}
/* next one assumes that ((line_size % 8) == 0) */
void avg_pixels8_xy2_altivec(uint8_t *block, const uint8_t *pixels, int line_size, int h)
{
POWERPC_PERF_DECLARE(altivec_avg_pixels8_xy2_num, 1);
#ifdef ALTIVEC_USE_REFERENCE_C_CODE
int j;
POWERPC_PERF_START_COUNT(altivec_avg_pixels8_xy2_num, 1);
for (j = 0; j < 2; j++) {
int i;
const uint32_t a = (((const struct unaligned_32 *) (pixels))->l);
const uint32_t b = (((const struct unaligned_32 *) (pixels + 1))->l);
uint32_t l0 = (a & 0x03030303UL) + (b & 0x03030303UL) + 0x02020202UL;
uint32_t h0 = ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
uint32_t l1, h1;
pixels += line_size;
for (i = 0; i < h; i += 2) {
uint32_t a = (((const struct unaligned_32 *) (pixels))->l);
uint32_t b = (((const struct unaligned_32 *) (pixels + 1))->l);
l1 = (a & 0x03030303UL) + (b & 0x03030303UL);
h1 = ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
*((uint32_t *) block) = rnd_avg32(*((uint32_t *) block), h0 + h1 + (((l0 + l1) >> 2) & 0x0F0F0F0FUL));
pixels += line_size;
block += line_size;
a = (((const struct unaligned_32 *) (pixels))->l);
b = (((const struct unaligned_32 *) (pixels + 1))->l);
l0 = (a & 0x03030303UL) + (b & 0x03030303UL) + 0x02020202UL;
h0 = ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2);
*((uint32_t *) block) = rnd_avg32(*((uint32_t *) block), h0 + h1 + (((l0 + l1) >> 2) & 0x0F0F0F0FUL));
pixels += line_size;
block += line_size;
} pixels += 4 - line_size * (h + 1);
block += 4 - line_size * h;
}
POWERPC_PERF_STOP_COUNT(altivec_avg_pixels8_xy2_num, 1);
#else /* ALTIVEC_USE_REFERENCE_C_CODE */
register int i;
register vector unsigned char
pixelsv1, pixelsv2,
pixelsavg;
register vector unsigned char
blockv, temp1, temp2, blocktemp;
register vector unsigned short
pixelssum1, pixelssum2, temp3;
register const_vector unsigned char vczero = (const_vector unsigned char)vec_splat_u8(0);
register const_vector unsigned short vctwo = (const_vector unsigned short)vec_splat_u16(2);
temp1 = vec_ld(0, pixels);
temp2 = vec_ld(16, pixels);
pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(0, pixels));
if ((((unsigned long)pixels) & 0x0000000F) == 0x0000000F)
{
pixelsv2 = temp2;
}
else
{
pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(1, pixels));
}
pixelsv1 = vec_mergeh(vczero, pixelsv1);
pixelsv2 = vec_mergeh(vczero, pixelsv2);
pixelssum1 = vec_add((vector unsigned short)pixelsv1,
(vector unsigned short)pixelsv2);
pixelssum1 = vec_add(pixelssum1, vctwo);
POWERPC_PERF_START_COUNT(altivec_avg_pixels8_xy2_num, 1);
for (i = 0; i < h ; i++) {
int rightside = ((unsigned long)block & 0x0000000F);
blockv = vec_ld(0, block);
temp1 = vec_ld(line_size, pixels);
temp2 = vec_ld(line_size + 16, pixels);
pixelsv1 = vec_perm(temp1, temp2, vec_lvsl(line_size, pixels));
if (((((unsigned long)pixels) + line_size) & 0x0000000F) == 0x0000000F)
{
pixelsv2 = temp2;
}
else
{
pixelsv2 = vec_perm(temp1, temp2, vec_lvsl(line_size + 1, pixels));
}
pixelsv1 = vec_mergeh(vczero, pixelsv1);
pixelsv2 = vec_mergeh(vczero, pixelsv2);
pixelssum2 = vec_add((vector unsigned short)pixelsv1,
(vector unsigned short)pixelsv2);
temp3 = vec_add(pixelssum1, pixelssum2);
temp3 = vec_sra(temp3, vctwo);
pixelssum1 = vec_add(pixelssum2, vctwo);
pixelsavg = vec_packsu(temp3, (vector unsigned short) vczero);
if (rightside)
{
blocktemp = vec_perm(blockv, pixelsavg, vcprm(0, 1, s0, s1));
}
else
{
blocktemp = vec_perm(blockv, pixelsavg, vcprm(s0, s1, 2, 3));
}
blockv = vec_avg(blocktemp, blockv);
vec_st(blockv, 0, block);
block += line_size;
pixels += line_size;
}
POWERPC_PERF_STOP_COUNT(altivec_avg_pixels8_xy2_num, 1);
#endif /* ALTIVEC_USE_REFERENCE_C_CODE */
}
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