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/*
* Copyright (c) 2022 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 "./vpx_dsp_rtcd.h"
#include "vpx/vpx_integer.h"
#include "vpx_util/loongson_intrinsics.h"
void vpx_comp_avg_pred_lsx(uint8_t *comp_pred, const uint8_t *pred, int width,
int height, const uint8_t *ref, int ref_stride) {
// width > 8 || width == 8 || width == 4
if (width > 8) {
int i, j;
for (i = 0; i < height; ++i) {
for (j = 0; j < width; j += 16) {
__m128i p, r, avg;
p = __lsx_vld(pred + j, 0);
r = __lsx_vld(ref + j, 0);
avg = __lsx_vavgr_bu(p, r);
__lsx_vst(avg, comp_pred + j, 0);
}
comp_pred += width;
pred += width;
ref += ref_stride;
}
} else if (width == 8) {
int i = height * width;
do {
__m128i p, r, r_0, r_1;
p = __lsx_vld(pred, 0);
r_0 = __lsx_vld(ref, 0);
ref += ref_stride;
r_1 = __lsx_vld(ref, 0);
ref += ref_stride;
r = __lsx_vilvl_d(r_1, r_0);
r = __lsx_vavgr_bu(p, r);
__lsx_vst(r, comp_pred, 0);
pred += 16;
comp_pred += 16;
i -= 16;
} while (i);
} else { // width = 4
int i = height * width;
assert(width == 4);
do {
__m128i p, r, r_0, r_1, r_2, r_3;
p = __lsx_vld(pred, 0);
if (width == ref_stride) {
r = __lsx_vld(ref, 0);
ref += 16;
} else {
r_0 = __lsx_vld(ref, 0);
ref += ref_stride;
r_1 = __lsx_vld(ref, 0);
ref += ref_stride;
r_2 = __lsx_vld(ref, 0);
ref += ref_stride;
r_3 = __lsx_vld(ref, 0);
ref += ref_stride;
DUP2_ARG2(__lsx_vilvl_w, r_1, r_0, r_3, r_2, r_0, r_2);
r = __lsx_vilvl_d(r_2, r_0);
}
r = __lsx_vavgr_bu(p, r);
__lsx_vst(r, comp_pred, 0);
comp_pred += 16;
pred += 16;
i -= 16;
} while (i);
}
}