ref: 927fad48472b969065226e6e727e5e7670d2ff68
dir: libvpx/vpx_dsp/mips/convolve8_avg_dspr2.c
/*
* Copyright (c) 2013 The WebM project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <assert.h>
#include <stdio.h>
#include "./vpx_dsp_rtcd.h"
#include "vpx_dsp/mips/convolve_common_dspr2.h"
#include "vpx_dsp/vpx_convolve.h"
#include "vpx_dsp/vpx_dsp_common.h"
#include "vpx_dsp/vpx_filter.h"
#include "vpx_ports/mem.h"
#if HAVE_DSPR2
static void convolve_avg_vert_4_dspr2(const uint8_t *src, int32_t src_stride,
uint8_t *dst, int32_t dst_stride,
const int16_t *filter_y, int32_t w,
int32_t h) {
int32_t x, y;
const uint8_t *src_ptr;
uint8_t *dst_ptr;
uint8_t *cm = vpx_ff_cropTbl;
uint32_t vector4a = 64;
uint32_t load1, load2, load3, load4;
uint32_t p1, p2;
uint32_t n1, n2;
uint32_t scratch1, scratch2;
uint32_t store1, store2;
int32_t vector1b, vector2b, vector3b, vector4b;
int32_t Temp1, Temp2;
vector1b = ((const int32_t *)filter_y)[0];
vector2b = ((const int32_t *)filter_y)[1];
vector3b = ((const int32_t *)filter_y)[2];
vector4b = ((const int32_t *)filter_y)[3];
src -= 3 * src_stride;
for (y = h; y--;) {
/* prefetch data to cache memory */
prefetch_store(dst + dst_stride);
for (x = 0; x < w; x += 4) {
src_ptr = src + x;
dst_ptr = dst + x;
__asm__ __volatile__(
"ulw %[load1], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load2], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load3], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load4], 0(%[src_ptr]) \n\t"
"mtlo %[vector4a], $ac0 \n\t"
"mtlo %[vector4a], $ac1 \n\t"
"mtlo %[vector4a], $ac2 \n\t"
"mtlo %[vector4a], $ac3 \n\t"
"mthi $zero, $ac0 \n\t"
"mthi $zero, $ac1 \n\t"
"mthi $zero, $ac2 \n\t"
"mthi $zero, $ac3 \n\t"
"preceu.ph.qbr %[scratch1], %[load1] \n\t"
"preceu.ph.qbr %[p1], %[load2] \n\t"
"precrq.ph.w %[n1], %[p1], %[scratch1] \n\t" /* pixel 2 */
"append %[p1], %[scratch1], 16 \n\t" /* pixel 1 */
"preceu.ph.qbr %[scratch2], %[load3] \n\t"
"preceu.ph.qbr %[p2], %[load4] \n\t"
"precrq.ph.w %[n2], %[p2], %[scratch2] \n\t" /* pixel 2 */
"append %[p2], %[scratch2], 16 \n\t" /* pixel 1 */
"dpa.w.ph $ac0, %[p1], %[vector1b] \n\t"
"dpa.w.ph $ac0, %[p2], %[vector2b] \n\t"
"dpa.w.ph $ac1, %[n1], %[vector1b] \n\t"
"dpa.w.ph $ac1, %[n2], %[vector2b] \n\t"
"preceu.ph.qbl %[scratch1], %[load1] \n\t"
"preceu.ph.qbl %[p1], %[load2] \n\t"
"precrq.ph.w %[n1], %[p1], %[scratch1] \n\t" /* pixel 2 */
"append %[p1], %[scratch1], 16 \n\t" /* pixel 1 */
"preceu.ph.qbl %[scratch2], %[load3] \n\t"
"preceu.ph.qbl %[p2], %[load4] \n\t"
"precrq.ph.w %[n2], %[p2], %[scratch2] \n\t" /* pixel 2 */
"append %[p2], %[scratch2], 16 \n\t" /* pixel 1 */
"dpa.w.ph $ac2, %[p1], %[vector1b] \n\t"
"dpa.w.ph $ac2, %[p2], %[vector2b] \n\t"
"dpa.w.ph $ac3, %[n1], %[vector1b] \n\t"
"dpa.w.ph $ac3, %[n2], %[vector2b] \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load1], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load2], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load3], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load4], 0(%[src_ptr]) \n\t"
"preceu.ph.qbr %[scratch1], %[load1] \n\t"
"preceu.ph.qbr %[p1], %[load2] \n\t"
"precrq.ph.w %[n1], %[p1], %[scratch1] \n\t" /* pixel 2 */
"append %[p1], %[scratch1], 16 \n\t" /* pixel 1 */
"preceu.ph.qbr %[scratch2], %[load3] \n\t"
"preceu.ph.qbr %[p2], %[load4] \n\t"
"precrq.ph.w %[n2], %[p2], %[scratch2] \n\t" /* pixel 2 */
"append %[p2], %[scratch2], 16 \n\t" /* pixel 1 */
"dpa.w.ph $ac0, %[p1], %[vector3b] \n\t"
"dpa.w.ph $ac0, %[p2], %[vector4b] \n\t"
"extp %[Temp1], $ac0, 31 \n\t"
"dpa.w.ph $ac1, %[n1], %[vector3b] \n\t"
"dpa.w.ph $ac1, %[n2], %[vector4b] \n\t"
"extp %[Temp2], $ac1, 31 \n\t"
"preceu.ph.qbl %[scratch1], %[load1] \n\t"
"preceu.ph.qbl %[p1], %[load2] \n\t"
"precrq.ph.w %[n1], %[p1], %[scratch1] \n\t" /* pixel 2 */
"append %[p1], %[scratch1], 16 \n\t" /* pixel 1 */
"lbu %[scratch1], 0(%[dst_ptr]) \n\t"
"preceu.ph.qbl %[scratch2], %[load3] \n\t"
"preceu.ph.qbl %[p2], %[load4] \n\t"
"precrq.ph.w %[n2], %[p2], %[scratch2] \n\t" /* pixel 2 */
"append %[p2], %[scratch2], 16 \n\t" /* pixel 1 */
"lbu %[scratch2], 1(%[dst_ptr]) \n\t"
"lbux %[store1], %[Temp1](%[cm]) \n\t"
"dpa.w.ph $ac2, %[p1], %[vector3b] \n\t"
"dpa.w.ph $ac2, %[p2], %[vector4b] \n\t"
"addqh_r.w %[store1], %[store1], %[scratch1] \n\t" /* pixel 1 */
"extp %[Temp1], $ac2, 31 \n\t"
"lbux %[store2], %[Temp2](%[cm]) \n\t"
"dpa.w.ph $ac3, %[n1], %[vector3b] \n\t"
"dpa.w.ph $ac3, %[n2], %[vector4b] \n\t"
"addqh_r.w %[store2], %[store2], %[scratch2] \n\t" /* pixel 2 */
"extp %[Temp2], $ac3, 31 \n\t"
"lbu %[scratch1], 2(%[dst_ptr]) \n\t"
"sb %[store1], 0(%[dst_ptr]) \n\t"
"sb %[store2], 1(%[dst_ptr]) \n\t"
"lbu %[scratch2], 3(%[dst_ptr]) \n\t"
"lbux %[store1], %[Temp1](%[cm]) \n\t"
"lbux %[store2], %[Temp2](%[cm]) \n\t"
"addqh_r.w %[store1], %[store1], %[scratch1] \n\t" /* pixel 3 */
"addqh_r.w %[store2], %[store2], %[scratch2] \n\t" /* pixel 4 */
"sb %[store1], 2(%[dst_ptr]) \n\t"
"sb %[store2], 3(%[dst_ptr]) \n\t"
: [load1] "=&r"(load1), [load2] "=&r"(load2), [load3] "=&r"(load3),
[load4] "=&r"(load4), [p1] "=&r"(p1), [p2] "=&r"(p2),
[n1] "=&r"(n1), [n2] "=&r"(n2), [scratch1] "=&r"(scratch1),
[scratch2] "=&r"(scratch2), [Temp1] "=&r"(Temp1),
[Temp2] "=&r"(Temp2), [store1] "=&r"(store1),
[store2] "=&r"(store2), [src_ptr] "+r"(src_ptr)
: [vector1b] "r"(vector1b), [vector2b] "r"(vector2b),
[vector3b] "r"(vector3b), [vector4b] "r"(vector4b),
[vector4a] "r"(vector4a), [src_stride] "r"(src_stride),
[cm] "r"(cm), [dst_ptr] "r"(dst_ptr));
}
/* Next row... */
src += src_stride;
dst += dst_stride;
}
}
static void convolve_avg_vert_64_dspr2(const uint8_t *src, int32_t src_stride,
uint8_t *dst, int32_t dst_stride,
const int16_t *filter_y, int32_t h) {
int32_t x, y;
const uint8_t *src_ptr;
uint8_t *dst_ptr;
uint8_t *cm = vpx_ff_cropTbl;
uint32_t vector4a = 64;
uint32_t load1, load2, load3, load4;
uint32_t p1, p2;
uint32_t n1, n2;
uint32_t scratch1, scratch2;
uint32_t store1, store2;
int32_t vector1b, vector2b, vector3b, vector4b;
int32_t Temp1, Temp2;
vector1b = ((const int32_t *)filter_y)[0];
vector2b = ((const int32_t *)filter_y)[1];
vector3b = ((const int32_t *)filter_y)[2];
vector4b = ((const int32_t *)filter_y)[3];
src -= 3 * src_stride;
for (y = h; y--;) {
/* prefetch data to cache memory */
prefetch_store(dst + dst_stride);
prefetch_store(dst + dst_stride + 32);
for (x = 0; x < 64; x += 4) {
src_ptr = src + x;
dst_ptr = dst + x;
__asm__ __volatile__(
"ulw %[load1], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load2], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load3], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load4], 0(%[src_ptr]) \n\t"
"mtlo %[vector4a], $ac0 \n\t"
"mtlo %[vector4a], $ac1 \n\t"
"mtlo %[vector4a], $ac2 \n\t"
"mtlo %[vector4a], $ac3 \n\t"
"mthi $zero, $ac0 \n\t"
"mthi $zero, $ac1 \n\t"
"mthi $zero, $ac2 \n\t"
"mthi $zero, $ac3 \n\t"
"preceu.ph.qbr %[scratch1], %[load1] \n\t"
"preceu.ph.qbr %[p1], %[load2] \n\t"
"precrq.ph.w %[n1], %[p1], %[scratch1] \n\t" /* pixel 2 */
"append %[p1], %[scratch1], 16 \n\t" /* pixel 1 */
"preceu.ph.qbr %[scratch2], %[load3] \n\t"
"preceu.ph.qbr %[p2], %[load4] \n\t"
"precrq.ph.w %[n2], %[p2], %[scratch2] \n\t" /* pixel 2 */
"append %[p2], %[scratch2], 16 \n\t" /* pixel 1 */
"dpa.w.ph $ac0, %[p1], %[vector1b] \n\t"
"dpa.w.ph $ac0, %[p2], %[vector2b] \n\t"
"dpa.w.ph $ac1, %[n1], %[vector1b] \n\t"
"dpa.w.ph $ac1, %[n2], %[vector2b] \n\t"
"preceu.ph.qbl %[scratch1], %[load1] \n\t"
"preceu.ph.qbl %[p1], %[load2] \n\t"
"precrq.ph.w %[n1], %[p1], %[scratch1] \n\t" /* pixel 2 */
"append %[p1], %[scratch1], 16 \n\t" /* pixel 1 */
"preceu.ph.qbl %[scratch2], %[load3] \n\t"
"preceu.ph.qbl %[p2], %[load4] \n\t"
"precrq.ph.w %[n2], %[p2], %[scratch2] \n\t" /* pixel 2 */
"append %[p2], %[scratch2], 16 \n\t" /* pixel 1 */
"dpa.w.ph $ac2, %[p1], %[vector1b] \n\t"
"dpa.w.ph $ac2, %[p2], %[vector2b] \n\t"
"dpa.w.ph $ac3, %[n1], %[vector1b] \n\t"
"dpa.w.ph $ac3, %[n2], %[vector2b] \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load1], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load2], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load3], 0(%[src_ptr]) \n\t"
"add %[src_ptr], %[src_ptr], %[src_stride] \n\t"
"ulw %[load4], 0(%[src_ptr]) \n\t"
"preceu.ph.qbr %[scratch1], %[load1] \n\t"
"preceu.ph.qbr %[p1], %[load2] \n\t"
"precrq.ph.w %[n1], %[p1], %[scratch1] \n\t" /* pixel 2 */
"append %[p1], %[scratch1], 16 \n\t" /* pixel 1 */
"preceu.ph.qbr %[scratch2], %[load3] \n\t"
"preceu.ph.qbr %[p2], %[load4] \n\t"
"precrq.ph.w %[n2], %[p2], %[scratch2] \n\t" /* pixel 2 */
"append %[p2], %[scratch2], 16 \n\t" /* pixel 1 */
"dpa.w.ph $ac0, %[p1], %[vector3b] \n\t"
"dpa.w.ph $ac0, %[p2], %[vector4b] \n\t"
"extp %[Temp1], $ac0, 31 \n\t"
"dpa.w.ph $ac1, %[n1], %[vector3b] \n\t"
"dpa.w.ph $ac1, %[n2], %[vector4b] \n\t"
"extp %[Temp2], $ac1, 31 \n\t"
"preceu.ph.qbl %[scratch1], %[load1] \n\t"
"preceu.ph.qbl %[p1], %[load2] \n\t"
"precrq.ph.w %[n1], %[p1], %[scratch1] \n\t" /* pixel 2 */
"append %[p1], %[scratch1], 16 \n\t" /* pixel 1 */
"lbu %[scratch1], 0(%[dst_ptr]) \n\t"
"preceu.ph.qbl %[scratch2], %[load3] \n\t"
"preceu.ph.qbl %[p2], %[load4] \n\t"
"precrq.ph.w %[n2], %[p2], %[scratch2] \n\t" /* pixel 2 */
"append %[p2], %[scratch2], 16 \n\t" /* pixel 1 */
"lbu %[scratch2], 1(%[dst_ptr]) \n\t"
"lbux %[store1], %[Temp1](%[cm]) \n\t"
"dpa.w.ph $ac2, %[p1], %[vector3b] \n\t"
"dpa.w.ph $ac2, %[p2], %[vector4b] \n\t"
"addqh_r.w %[store1], %[store1], %[scratch1] \n\t" /* pixel 1 */
"extp %[Temp1], $ac2, 31 \n\t"
"lbux %[store2], %[Temp2](%[cm]) \n\t"
"dpa.w.ph $ac3, %[n1], %[vector3b] \n\t"
"dpa.w.ph $ac3, %[n2], %[vector4b] \n\t"
"addqh_r.w %[store2], %[store2], %[scratch2] \n\t" /* pixel 2 */
"extp %[Temp2], $ac3, 31 \n\t"
"lbu %[scratch1], 2(%[dst_ptr]) \n\t"
"sb %[store1], 0(%[dst_ptr]) \n\t"
"sb %[store2], 1(%[dst_ptr]) \n\t"
"lbu %[scratch2], 3(%[dst_ptr]) \n\t"
"lbux %[store1], %[Temp1](%[cm]) \n\t"
"lbux %[store2], %[Temp2](%[cm]) \n\t"
"addqh_r.w %[store1], %[store1], %[scratch1] \n\t" /* pixel 3 */
"addqh_r.w %[store2], %[store2], %[scratch2] \n\t" /* pixel 4 */
"sb %[store1], 2(%[dst_ptr]) \n\t"
"sb %[store2], 3(%[dst_ptr]) \n\t"
: [load1] "=&r"(load1), [load2] "=&r"(load2), [load3] "=&r"(load3),
[load4] "=&r"(load4), [p1] "=&r"(p1), [p2] "=&r"(p2),
[n1] "=&r"(n1), [n2] "=&r"(n2), [scratch1] "=&r"(scratch1),
[scratch2] "=&r"(scratch2), [Temp1] "=&r"(Temp1),
[Temp2] "=&r"(Temp2), [store1] "=&r"(store1),
[store2] "=&r"(store2), [src_ptr] "+r"(src_ptr)
: [vector1b] "r"(vector1b), [vector2b] "r"(vector2b),
[vector3b] "r"(vector3b), [vector4b] "r"(vector4b),
[vector4a] "r"(vector4a), [src_stride] "r"(src_stride),
[cm] "r"(cm), [dst_ptr] "r"(dst_ptr));
}
/* Next row... */
src += src_stride;
dst += dst_stride;
}
}
void vpx_convolve8_avg_vert_dspr2(const uint8_t *src, ptrdiff_t src_stride,
uint8_t *dst, ptrdiff_t dst_stride,
const InterpKernel *filter, int x0_q4,
int32_t x_step_q4, int y0_q4, int y_step_q4,
int w, int h) {
const int16_t *const filter_y = filter[y0_q4];
assert(y_step_q4 == 16);
assert(((const int32_t *)filter_y)[1] != 0x800000);
if (vpx_get_filter_taps(filter_y) == 2) {
vpx_convolve2_avg_vert_dspr2(src, src_stride, dst, dst_stride, filter,
x0_q4, x_step_q4, y0_q4, y_step_q4, w, h);
} else {
uint32_t pos = 38;
/* bit positon for extract from acc */
__asm__ __volatile__("wrdsp %[pos], 1 \n\t"
:
: [pos] "r"(pos));
prefetch_store(dst);
switch (w) {
case 4:
case 8:
case 16:
case 32:
convolve_avg_vert_4_dspr2(src, src_stride, dst, dst_stride, filter_y, w,
h);
break;
case 64:
prefetch_store(dst + 32);
convolve_avg_vert_64_dspr2(src, src_stride, dst, dst_stride, filter_y,
h);
break;
default:
vpx_convolve8_avg_vert_c(src, src_stride, dst, dst_stride, filter,
x0_q4, x_step_q4, y0_q4, y_step_q4, w, h);
break;
}
}
}
void vpx_convolve8_avg_dspr2(const uint8_t *src, ptrdiff_t src_stride,
uint8_t *dst, ptrdiff_t dst_stride,
const InterpKernel *filter, int x0_q4,
int32_t x_step_q4, int y0_q4, int y_step_q4, int w,
int h) {
/* Fixed size intermediate buffer places limits on parameters. */
DECLARE_ALIGNED(32, uint8_t, temp[64 * 135]);
int32_t intermediate_height = ((h * y_step_q4) >> 4) + 7;
assert(w <= 64);
assert(h <= 64);
assert(x_step_q4 == 16);
assert(y_step_q4 == 16);
if (intermediate_height < h) intermediate_height = h;
vpx_convolve8_horiz(src - (src_stride * 3), src_stride, temp, 64, filter,
x0_q4, x_step_q4, y0_q4, y_step_q4, w,
intermediate_height);
vpx_convolve8_avg_vert(temp + 64 * 3, 64, dst, dst_stride, filter, x0_q4,
x_step_q4, y0_q4, y_step_q4, w, h);
}
void vpx_convolve_avg_dspr2(const uint8_t *src, ptrdiff_t src_stride,
uint8_t *dst, ptrdiff_t dst_stride,
const InterpKernel *filter, int x0_q4,
int32_t x_step_q4, int y0_q4, int y_step_q4, int w,
int h) {
int x, y;
uint32_t tp1, tp2, tn1, tp3, tp4, tn2;
(void)filter;
(void)x0_q4;
(void)x_step_q4;
(void)y0_q4;
(void)y_step_q4;
/* prefetch data to cache memory */
prefetch_load(src);
prefetch_load(src + 32);
prefetch_store(dst);
switch (w) {
case 4:
/* 1 word storage */
for (y = h; y--;) {
prefetch_load(src + src_stride);
prefetch_load(src + src_stride + 32);
prefetch_store(dst + dst_stride);
__asm__ __volatile__(
"ulw %[tp1], 0(%[src]) \n\t"
"ulw %[tp2], 0(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"sw %[tn1], 0(%[dst]) \n\t" /* store */
: [tn1] "=&r"(tn1), [tp1] "=&r"(tp1), [tp2] "=&r"(tp2)
: [src] "r"(src), [dst] "r"(dst));
src += src_stride;
dst += dst_stride;
}
break;
case 8:
/* 2 word storage */
for (y = h; y--;) {
prefetch_load(src + src_stride);
prefetch_load(src + src_stride + 32);
prefetch_store(dst + dst_stride);
__asm__ __volatile__(
"ulw %[tp1], 0(%[src]) \n\t"
"ulw %[tp2], 0(%[dst]) \n\t"
"ulw %[tp3], 4(%[src]) \n\t"
"ulw %[tp4], 4(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"sw %[tn1], 0(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 4(%[dst]) \n\t" /* store */
: [tp1] "=&r"(tp1), [tp2] "=&r"(tp2), [tp3] "=&r"(tp3),
[tp4] "=&r"(tp4), [tn1] "=&r"(tn1), [tn2] "=&r"(tn2)
: [src] "r"(src), [dst] "r"(dst));
src += src_stride;
dst += dst_stride;
}
break;
case 16:
/* 4 word storage */
for (y = h; y--;) {
prefetch_load(src + src_stride);
prefetch_load(src + src_stride + 32);
prefetch_store(dst + dst_stride);
__asm__ __volatile__(
"ulw %[tp1], 0(%[src]) \n\t"
"ulw %[tp2], 0(%[dst]) \n\t"
"ulw %[tp3], 4(%[src]) \n\t"
"ulw %[tp4], 4(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"ulw %[tp1], 8(%[src]) \n\t"
"ulw %[tp2], 8(%[dst]) \n\t"
"sw %[tn1], 0(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 4(%[dst]) \n\t" /* store */
"ulw %[tp3], 12(%[src]) \n\t"
"ulw %[tp4], 12(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"sw %[tn1], 8(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 12(%[dst]) \n\t" /* store */
: [tp1] "=&r"(tp1), [tp2] "=&r"(tp2), [tp3] "=&r"(tp3),
[tp4] "=&r"(tp4), [tn1] "=&r"(tn1), [tn2] "=&r"(tn2)
: [src] "r"(src), [dst] "r"(dst));
src += src_stride;
dst += dst_stride;
}
break;
case 32:
/* 8 word storage */
for (y = h; y--;) {
prefetch_load(src + src_stride);
prefetch_load(src + src_stride + 32);
prefetch_store(dst + dst_stride);
__asm__ __volatile__(
"ulw %[tp1], 0(%[src]) \n\t"
"ulw %[tp2], 0(%[dst]) \n\t"
"ulw %[tp3], 4(%[src]) \n\t"
"ulw %[tp4], 4(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"ulw %[tp1], 8(%[src]) \n\t"
"ulw %[tp2], 8(%[dst]) \n\t"
"sw %[tn1], 0(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 4(%[dst]) \n\t" /* store */
"ulw %[tp3], 12(%[src]) \n\t"
"ulw %[tp4], 12(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"ulw %[tp1], 16(%[src]) \n\t"
"ulw %[tp2], 16(%[dst]) \n\t"
"sw %[tn1], 8(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 12(%[dst]) \n\t" /* store */
"ulw %[tp3], 20(%[src]) \n\t"
"ulw %[tp4], 20(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"ulw %[tp1], 24(%[src]) \n\t"
"ulw %[tp2], 24(%[dst]) \n\t"
"sw %[tn1], 16(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 20(%[dst]) \n\t" /* store */
"ulw %[tp3], 28(%[src]) \n\t"
"ulw %[tp4], 28(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"sw %[tn1], 24(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 28(%[dst]) \n\t" /* store */
: [tp1] "=&r"(tp1), [tp2] "=&r"(tp2), [tp3] "=&r"(tp3),
[tp4] "=&r"(tp4), [tn1] "=&r"(tn1), [tn2] "=&r"(tn2)
: [src] "r"(src), [dst] "r"(dst));
src += src_stride;
dst += dst_stride;
}
break;
case 64:
prefetch_load(src + 64);
prefetch_store(dst + 32);
/* 16 word storage */
for (y = h; y--;) {
prefetch_load(src + src_stride);
prefetch_load(src + src_stride + 32);
prefetch_load(src + src_stride + 64);
prefetch_store(dst + dst_stride);
prefetch_store(dst + dst_stride + 32);
__asm__ __volatile__(
"ulw %[tp1], 0(%[src]) \n\t"
"ulw %[tp2], 0(%[dst]) \n\t"
"ulw %[tp3], 4(%[src]) \n\t"
"ulw %[tp4], 4(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"ulw %[tp1], 8(%[src]) \n\t"
"ulw %[tp2], 8(%[dst]) \n\t"
"sw %[tn1], 0(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 4(%[dst]) \n\t" /* store */
"ulw %[tp3], 12(%[src]) \n\t"
"ulw %[tp4], 12(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"ulw %[tp1], 16(%[src]) \n\t"
"ulw %[tp2], 16(%[dst]) \n\t"
"sw %[tn1], 8(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 12(%[dst]) \n\t" /* store */
"ulw %[tp3], 20(%[src]) \n\t"
"ulw %[tp4], 20(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"ulw %[tp1], 24(%[src]) \n\t"
"ulw %[tp2], 24(%[dst]) \n\t"
"sw %[tn1], 16(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 20(%[dst]) \n\t" /* store */
"ulw %[tp3], 28(%[src]) \n\t"
"ulw %[tp4], 28(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"ulw %[tp1], 32(%[src]) \n\t"
"ulw %[tp2], 32(%[dst]) \n\t"
"sw %[tn1], 24(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 28(%[dst]) \n\t" /* store */
"ulw %[tp3], 36(%[src]) \n\t"
"ulw %[tp4], 36(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"ulw %[tp1], 40(%[src]) \n\t"
"ulw %[tp2], 40(%[dst]) \n\t"
"sw %[tn1], 32(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 36(%[dst]) \n\t" /* store */
"ulw %[tp3], 44(%[src]) \n\t"
"ulw %[tp4], 44(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"ulw %[tp1], 48(%[src]) \n\t"
"ulw %[tp2], 48(%[dst]) \n\t"
"sw %[tn1], 40(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 44(%[dst]) \n\t" /* store */
"ulw %[tp3], 52(%[src]) \n\t"
"ulw %[tp4], 52(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"ulw %[tp1], 56(%[src]) \n\t"
"ulw %[tp2], 56(%[dst]) \n\t"
"sw %[tn1], 48(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 52(%[dst]) \n\t" /* store */
"ulw %[tp3], 60(%[src]) \n\t"
"ulw %[tp4], 60(%[dst]) \n\t"
"adduh_r.qb %[tn1], %[tp2], %[tp1] \n\t" /* average */
"sw %[tn1], 56(%[dst]) \n\t" /* store */
"adduh_r.qb %[tn2], %[tp3], %[tp4] \n\t" /* average */
"sw %[tn2], 60(%[dst]) \n\t" /* store */
: [tp1] "=&r"(tp1), [tp2] "=&r"(tp2), [tp3] "=&r"(tp3),
[tp4] "=&r"(tp4), [tn1] "=&r"(tn1), [tn2] "=&r"(tn2)
: [src] "r"(src), [dst] "r"(dst));
src += src_stride;
dst += dst_stride;
}
break;
default:
for (y = h; y > 0; --y) {
for (x = 0; x < w; ++x) {
dst[x] = (dst[x] + src[x] + 1) >> 1;
}
src += src_stride;
dst += dst_stride;
}
break;
}
}
#endif