ref: 197827edb87eb9387d946af999366c4ec5f0d88e
dir: /vpx_dsp/ppc/hadamard_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 "./vpx_dsp_rtcd.h" #include "vpx_dsp/ppc/types_vsx.h" #include "vpx_dsp/ppc/transpose_vsx.h" #include "vpx_dsp/ppc/bitdepth_conversion_vsx.h" static void vpx_hadamard_s16_8x8_one_pass(int16x8_t v[8]) { const int16x8_t b0 = vec_add(v[0], v[1]); const int16x8_t b1 = vec_sub(v[0], v[1]); const int16x8_t b2 = vec_add(v[2], v[3]); const int16x8_t b3 = vec_sub(v[2], v[3]); const int16x8_t b4 = vec_add(v[4], v[5]); const int16x8_t b5 = vec_sub(v[4], v[5]); const int16x8_t b6 = vec_add(v[6], v[7]); const int16x8_t b7 = vec_sub(v[6], v[7]); const int16x8_t c0 = vec_add(b0, b2); const int16x8_t c1 = vec_add(b1, b3); const int16x8_t c2 = vec_sub(b0, b2); const int16x8_t c3 = vec_sub(b1, b3); const int16x8_t c4 = vec_add(b4, b6); const int16x8_t c5 = vec_add(b5, b7); const int16x8_t c6 = vec_sub(b4, b6); const int16x8_t c7 = vec_sub(b5, b7); v[0] = vec_add(c0, c4); v[1] = vec_sub(c2, c6); v[2] = vec_sub(c0, c4); v[3] = vec_add(c2, c6); v[4] = vec_add(c3, c7); v[5] = vec_sub(c3, c7); v[6] = vec_sub(c1, c5); v[7] = vec_add(c1, c5); } void vpx_hadamard_8x8_vsx(const int16_t *src_diff, ptrdiff_t src_stride, tran_low_t *coeff) { int16x8_t v[8]; v[0] = vec_vsx_ld(0, src_diff); v[1] = vec_vsx_ld(0, src_diff + src_stride); v[2] = vec_vsx_ld(0, src_diff + (2 * src_stride)); v[3] = vec_vsx_ld(0, src_diff + (3 * src_stride)); v[4] = vec_vsx_ld(0, src_diff + (4 * src_stride)); v[5] = vec_vsx_ld(0, src_diff + (5 * src_stride)); v[6] = vec_vsx_ld(0, src_diff + (6 * src_stride)); v[7] = vec_vsx_ld(0, src_diff + (7 * src_stride)); vpx_hadamard_s16_8x8_one_pass(v); vpx_transpose_s16_8x8(v); vpx_hadamard_s16_8x8_one_pass(v); store_tran_low(v[0], 0, coeff); store_tran_low(v[1], 0, coeff + 8); store_tran_low(v[2], 0, coeff + 16); store_tran_low(v[3], 0, coeff + 24); store_tran_low(v[4], 0, coeff + 32); store_tran_low(v[5], 0, coeff + 40); store_tran_low(v[6], 0, coeff + 48); store_tran_low(v[7], 0, coeff + 56); } void vpx_hadamard_16x16_vsx(const int16_t *src_diff, ptrdiff_t src_stride, tran_low_t *coeff) { int i; const uint16x8_t ones = vec_splat_u16(1); /* Rearrange 16x16 to 8x32 and remove stride. * Top left first. */ vpx_hadamard_8x8_vsx(src_diff, src_stride, coeff); /* Top right. */ vpx_hadamard_8x8_vsx(src_diff + 8 + 0 * src_stride, src_stride, coeff + 64); /* Bottom left. */ vpx_hadamard_8x8_vsx(src_diff + 0 + 8 * src_stride, src_stride, coeff + 128); /* Bottom right. */ vpx_hadamard_8x8_vsx(src_diff + 8 + 8 * src_stride, src_stride, coeff + 192); /* Overlay the 8x8 blocks and combine. */ for (i = 0; i < 64; i += 8) { const int16x8_t a0 = load_tran_low(0, coeff); const int16x8_t a1 = load_tran_low(0, coeff + 64); const int16x8_t a2 = load_tran_low(0, coeff + 128); const int16x8_t a3 = load_tran_low(0, coeff + 192); /* Prevent the result from escaping int16_t. */ const int16x8_t b0 = vec_sra(a0, ones); const int16x8_t b1 = vec_sra(a1, ones); const int16x8_t b2 = vec_sra(a2, ones); const int16x8_t b3 = vec_sra(a3, ones); const int16x8_t c0 = vec_add(b0, b1); const int16x8_t c2 = vec_add(b2, b3); const int16x8_t c1 = vec_sub(b0, b1); const int16x8_t c3 = vec_sub(b2, b3); const int16x8_t d0 = vec_add(c0, c2); const int16x8_t d1 = vec_add(c1, c3); const int16x8_t d2 = vec_sub(c0, c2); const int16x8_t d3 = vec_sub(c1, c3); store_tran_low(d0, 0, coeff); store_tran_low(d1, 0, coeff + 64); store_tran_low(d2, 0, coeff + 128); store_tran_low(d3, 0, coeff + 192); coeff += 8; } }