ref: c706c02291ab756685828a4f1804d72a3db330f4
dir: /vpx_dsp/ppc/variance_vsx.c/
/* * Copyright (c) 2017 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_dsp/ppc/types_vsx.h" static inline uint8x16_t read4x2(const uint8_t *a, int stride) { const uint32x4_t a0 = (uint32x4_t)vec_vsx_ld(0, a); const uint32x4_t a1 = (uint32x4_t)vec_vsx_ld(0, a + stride); return (uint8x16_t)vec_mergeh(a0, a1); } uint32_t vpx_get4x4sse_cs_vsx(const uint8_t *a, int a_stride, const uint8_t *b, int b_stride) { int distortion; const int16x8_t a0 = unpack_to_s16_h(read4x2(a, a_stride)); const int16x8_t a1 = unpack_to_s16_h(read4x2(a + a_stride * 2, a_stride)); const int16x8_t b0 = unpack_to_s16_h(read4x2(b, b_stride)); const int16x8_t b1 = unpack_to_s16_h(read4x2(b + b_stride * 2, b_stride)); const int16x8_t d0 = vec_sub(a0, b0); const int16x8_t d1 = vec_sub(a1, b1); const int32x4_t ds = vec_msum(d1, d1, vec_msum(d0, d0, vec_splat_s32(0))); const int32x4_t d = vec_splat(vec_sums(ds, vec_splat_s32(0)), 3); vec_ste(d, 0, &distortion); return distortion; } // TODO(lu_zero): Unroll uint32_t vpx_get_mb_ss_vsx(const int16_t *a) { unsigned int i, sum = 0; int32x4_t s = vec_splat_s32(0); for (i = 0; i < 256; i += 8) { const int16x8_t v = vec_vsx_ld(0, a + i); s = vec_msum(v, v, s); } s = vec_splat(vec_sums(s, vec_splat_s32(0)), 3); vec_ste((uint32x4_t)s, 0, &sum); return sum; } void vpx_comp_avg_pred_vsx(uint8_t *comp_pred, const uint8_t *pred, int width, int height, const uint8_t *ref, int ref_stride) { int i, j; /* comp_pred and pred must be 16 byte aligned. */ assert(((intptr_t)comp_pred & 0xf) == 0); assert(((intptr_t)pred & 0xf) == 0); if (width >= 16) { for (i = 0; i < height; ++i) { for (j = 0; j < width; j += 16) { const uint8x16_t v = vec_avg(vec_vsx_ld(j, pred), vec_vsx_ld(j, ref)); vec_vsx_st(v, j, comp_pred); } comp_pred += width; pred += width; ref += ref_stride; } } else if (width == 8) { // Process 2 lines at time for (i = 0; i < height / 2; ++i) { const uint8x16_t r0 = vec_vsx_ld(0, ref); const uint8x16_t r1 = vec_vsx_ld(0, ref + ref_stride); const uint8x16_t r = xxpermdi(r0, r1, 0); const uint8x16_t v = vec_avg(vec_vsx_ld(0, pred), r); vec_vsx_st(v, 0, comp_pred); comp_pred += 16; // width * 2; pred += 16; // width * 2; ref += ref_stride * 2; } } else { assert(width == 4); // process 4 lines at time for (i = 0; i < height / 4; ++i) { const uint32x4_t r0 = (uint32x4_t)vec_vsx_ld(0, ref); const uint32x4_t r1 = (uint32x4_t)vec_vsx_ld(0, ref + ref_stride); const uint32x4_t r2 = (uint32x4_t)vec_vsx_ld(0, ref + ref_stride * 2); const uint32x4_t r3 = (uint32x4_t)vec_vsx_ld(0, ref + ref_stride * 3); const uint8x16_t r = (uint8x16_t)xxpermdi(vec_mergeh(r0, r1), vec_mergeh(r2, r3), 0); const uint8x16_t v = vec_avg(vec_vsx_ld(0, pred), r); vec_vsx_st(v, 0, comp_pred); comp_pred += 16; // width * 4; pred += 16; // width * 4; ref += ref_stride * 4; } } }