ref: 539230a07587bbc2aeac0ce6ae52d20ffb56cc9b
dir: /vpx_dsp/arm/fdct_partial_neon.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 <arm_neon.h> #include "./vpx_dsp_rtcd.h" #include "./vpx_config.h" #include "vpx_dsp/arm/mem_neon.h" #include "vpx_dsp/arm/sum_neon.h" static INLINE tran_low_t get_lane(const int32x2_t a) { #if CONFIG_VP9_HIGHBITDEPTH return vget_lane_s32(a, 0); #else return vget_lane_s16(vreinterpret_s16_s32(a), 0); #endif // CONFIG_VP9_HIGHBITDETPH } void vpx_fdct4x4_1_neon(const int16_t *input, tran_low_t *output, int stride) { int16x4_t a0, a1, a2, a3; int16x8_t b0, b1; int16x8_t c; int32x2_t d; a0 = vld1_s16(input); input += stride; a1 = vld1_s16(input); input += stride; a2 = vld1_s16(input); input += stride; a3 = vld1_s16(input); b0 = vcombine_s16(a0, a1); b1 = vcombine_s16(a2, a3); c = vaddq_s16(b0, b1); d = horizontal_add_int16x8(c); output[0] = get_lane(vshl_n_s32(d, 1)); output[1] = 0; } void vpx_fdct8x8_1_neon(const int16_t *input, tran_low_t *output, int stride) { int r; int16x8_t sum = vld1q_s16(&input[0]); for (r = 1; r < 8; ++r) { const int16x8_t input_00 = vld1q_s16(&input[r * stride]); sum = vaddq_s16(sum, input_00); } output[0] = get_lane(horizontal_add_int16x8(sum)); output[1] = 0; } void vpx_fdct16x16_1_neon(const int16_t *input, tran_low_t *output, int stride) { int r; int16x8_t left = vld1q_s16(input); int16x8_t right = vld1q_s16(input + 8); int32x2_t sum; input += stride; for (r = 1; r < 16; ++r) { const int16x8_t a = vld1q_s16(input); const int16x8_t b = vld1q_s16(input + 8); input += stride; left = vaddq_s16(left, a); right = vaddq_s16(right, b); } sum = vadd_s32(horizontal_add_int16x8(left), horizontal_add_int16x8(right)); output[0] = get_lane(vshr_n_s32(sum, 1)); output[1] = 0; } void vpx_fdct32x32_1_neon(const int16_t *input, tran_low_t *output, int stride) { int r; int16x8_t a0 = vld1q_s16(input); int16x8_t a1 = vld1q_s16(input + 8); int16x8_t a2 = vld1q_s16(input + 16); int16x8_t a3 = vld1q_s16(input + 24); int32x2_t sum; input += stride; for (r = 1; r < 32; ++r) { const int16x8_t b0 = vld1q_s16(input); const int16x8_t b1 = vld1q_s16(input + 8); const int16x8_t b2 = vld1q_s16(input + 16); const int16x8_t b3 = vld1q_s16(input + 24); input += stride; a0 = vaddq_s16(a0, b0); a1 = vaddq_s16(a1, b1); a2 = vaddq_s16(a2, b2); a3 = vaddq_s16(a3, b3); } sum = vadd_s32(horizontal_add_int16x8(a0), horizontal_add_int16x8(a1)); sum = vadd_s32(sum, horizontal_add_int16x8(a2)); sum = vadd_s32(sum, horizontal_add_int16x8(a3)); output[0] = get_lane(vshr_n_s32(sum, 3)); output[1] = 0; }