54 lines
2.3 KiB
C
54 lines
2.3 KiB
C
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/*
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* Copyright (c) 2017 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include <stdlib.h>
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#include "vpx_dsp/ppc/types_vsx.h"
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#include "vpx/vpx_integer.h"
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#define PROCESS16(offset) \
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v_a = vec_vsx_ld(offset, a); \
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v_b = vec_vsx_ld(offset, b); \
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v_ah = unpack_to_s16_h(v_a); \
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v_al = unpack_to_s16_l(v_a); \
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v_bh = unpack_to_s16_h(v_b); \
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v_bl = unpack_to_s16_l(v_b); \
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v_subh = vec_sub(v_ah, v_bh); \
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v_subl = vec_sub(v_al, v_bl); \
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v_absh = vec_abs(v_subh); \
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v_absl = vec_abs(v_subl); \
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v_sad = vec_sum4s(v_absh, v_sad); \
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v_sad = vec_sum4s(v_absl, v_sad);
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#define SAD16(height) \
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unsigned int vpx_sad16x##height##_vsx(const uint8_t *a, int a_stride, \
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const uint8_t *b, int b_stride) { \
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int y; \
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unsigned int sad[4]; \
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uint8x16_t v_a, v_b; \
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int16x8_t v_ah, v_al, v_bh, v_bl, v_absh, v_absl, v_subh, v_subl; \
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int32x4_t v_sad = vec_splat_s32(0); \
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\
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for (y = 0; y < height; y++) { \
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PROCESS16(0); \
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\
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a += a_stride; \
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b += b_stride; \
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} \
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vec_vsx_st((uint32x4_t)v_sad, 0, sad); \
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\
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return sad[3] + sad[2] + sad[1] + sad[0]; \
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}
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SAD16(8);
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SAD16(16);
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SAD16(32);
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