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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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "../dsputil.h"
#include "gcc_fixes.h"
#include "dsputil_altivec.h"
#ifdef CONFIG_DARWIN
#include <sys/sysctl.h>
#else /* CONFIG_DARWIN */
#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 */
int pix_abs16x16_x2_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
{
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<16;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 pix_abs16x16_y2_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
{
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<16;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 pix_abs16x16_xy2_altivec(uint8_t *pix1, uint8_t *pix2, int line_size)
{
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<16;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 pix_abs16x16_altivec(uint8_t *pix1, uint8_t *pix2, 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 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<16;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 pix_abs8x8_altivec(uint8_t *pix1, uint8_t *pix2, 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 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<8;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 pix_abs8x8_altivec code above w/ squaring added.
*/
int sse8_altivec(void *v, uint8_t *pix1, uint8_t *pix2, 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 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<8;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 pix_abs16x16_altivec code above w/ squaring added.
*/
int sse16_altivec(void *v, uint8_t *pix1, uint8_t *pix2, 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 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<16;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;
}
}
int sad16x16_altivec(void *s, uint8_t *a, uint8_t *b, int stride) {
return pix_abs16x16_altivec(a,b,stride);
}
int sad8x8_altivec(void *s, uint8_t *a, uint8_t *b, int stride) {
return pix_abs8x8_altivec(a,b,stride);
}
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 )) = (((const struct unaligned_32 *) (pixels))->l);
*((uint32_t*)(block+4)) = (((const struct unaligned_32 *) (pixels+4))->l);
*((uint32_t*)(block+8)) = (((const struct unaligned_32 *) (pixels+8))->l);
*((uint32_t*)(block+12)) = (((const struct unaligned_32 *) (pixels+12))->l);
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(16, (unsigned char*)pixels);
pixelsv1B = vec_ld(line_size, (unsigned char*)pixels);
pixelsv2B = vec_ld(16 + line_size, (unsigned char*)pixels);
pixelsv1C = vec_ld(line_size_2, (unsigned char*)pixels);
pixelsv2C = vec_ld(16 + line_size_2, (unsigned char*)pixels);
pixelsv1D = vec_ld(line_size_3, (unsigned char*)pixels);
pixelsv2D = vec_ld(16 + 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)),(((const struct unaligned_32 *)(pixels))->l));
op_avg(*((uint32_t*)(block+4)),(((const struct unaligned_32 *)(pixels+4))->l));
op_avg(*((uint32_t*)(block+8)),(((const struct unaligned_32 *)(pixels+8))->l));
op_avg(*((uint32_t*)(block+12)),(((const struct unaligned_32 *)(pixels+12))->l));
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 has_altivec(void)
{
#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;
}