| /* |
| * Copyright (c) 2023, Alliance for Open Media. All rights reserved. |
| * |
| * This source code is subject to the terms of the BSD 2 Clause License and |
| * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License |
| * was not distributed with this source code in the LICENSE file, you can |
| * obtain it at www.aomedia.org/license/software. If the Alliance for Open |
| * Media Patent License 1.0 was not distributed with this source code in the |
| * PATENTS file, you can obtain it at www.aomedia.org/license/patent. |
| */ |
| |
| #include <arm_neon.h> |
| #include <assert.h> |
| |
| #include "aom_dsp/arm/mem_neon.h" |
| #include "aom_dsp/arm/sum_neon.h" |
| #include "config/aom_dsp_rtcd.h" |
| |
| static inline uint64_t aom_var_2d_u8_4xh_neon_dotprod(uint8_t *src, |
| int src_stride, int width, |
| int height) { |
| uint64_t sum = 0; |
| uint64_t sse = 0; |
| uint32x2_t sum_u32 = vdup_n_u32(0); |
| uint32x2_t sse_u32 = vdup_n_u32(0); |
| |
| int h = height / 2; |
| do { |
| int w = width; |
| uint8_t *src_ptr = src; |
| do { |
| uint8x8_t s0 = load_unaligned_u8(src_ptr, src_stride); |
| |
| sum_u32 = vdot_u32(sum_u32, s0, vdup_n_u8(1)); |
| |
| sse_u32 = vdot_u32(sse_u32, s0, s0); |
| |
| src_ptr += 8; |
| w -= 8; |
| } while (w >= 8); |
| |
| // Process remaining columns in the row using C. |
| while (w > 0) { |
| int idx = width - w; |
| const uint8_t v = src[idx]; |
| sum += v; |
| sse += v * v; |
| w--; |
| } |
| |
| src += 2 * src_stride; |
| } while (--h != 0); |
| |
| sum += horizontal_long_add_u32x2(sum_u32); |
| sse += horizontal_long_add_u32x2(sse_u32); |
| |
| return sse - sum * sum / (width * height); |
| } |
| |
| static inline uint64_t aom_var_2d_u8_8xh_neon_dotprod(uint8_t *src, |
| int src_stride, int width, |
| int height) { |
| uint64_t sum = 0; |
| uint64_t sse = 0; |
| uint32x2_t sum_u32 = vdup_n_u32(0); |
| uint32x2_t sse_u32 = vdup_n_u32(0); |
| |
| int h = height; |
| do { |
| int w = width; |
| uint8_t *src_ptr = src; |
| do { |
| uint8x8_t s0 = vld1_u8(src_ptr); |
| |
| sum_u32 = vdot_u32(sum_u32, s0, vdup_n_u8(1)); |
| |
| sse_u32 = vdot_u32(sse_u32, s0, s0); |
| |
| src_ptr += 8; |
| w -= 8; |
| } while (w >= 8); |
| |
| // Process remaining columns in the row using C. |
| while (w > 0) { |
| int idx = width - w; |
| const uint8_t v = src[idx]; |
| sum += v; |
| sse += v * v; |
| w--; |
| } |
| |
| src += src_stride; |
| } while (--h != 0); |
| |
| sum += horizontal_long_add_u32x2(sum_u32); |
| sse += horizontal_long_add_u32x2(sse_u32); |
| |
| return sse - sum * sum / (width * height); |
| } |
| |
| static inline uint64_t aom_var_2d_u8_16xh_neon_dotprod(uint8_t *src, |
| int src_stride, |
| int width, int height) { |
| uint64_t sum = 0; |
| uint64_t sse = 0; |
| uint32x4_t sum_u32 = vdupq_n_u32(0); |
| uint32x4_t sse_u32 = vdupq_n_u32(0); |
| |
| int h = height; |
| do { |
| int w = width; |
| uint8_t *src_ptr = src; |
| do { |
| uint8x16_t s0 = vld1q_u8(src_ptr); |
| |
| sum_u32 = vdotq_u32(sum_u32, s0, vdupq_n_u8(1)); |
| |
| sse_u32 = vdotq_u32(sse_u32, s0, s0); |
| |
| src_ptr += 16; |
| w -= 16; |
| } while (w >= 16); |
| |
| // Process remaining columns in the row using C. |
| while (w > 0) { |
| int idx = width - w; |
| const uint8_t v = src[idx]; |
| sum += v; |
| sse += v * v; |
| w--; |
| } |
| |
| src += src_stride; |
| } while (--h != 0); |
| |
| sum += horizontal_long_add_u32x4(sum_u32); |
| sse += horizontal_long_add_u32x4(sse_u32); |
| |
| return sse - sum * sum / (width * height); |
| } |
| |
| uint64_t aom_var_2d_u8_neon_dotprod(uint8_t *src, int src_stride, int width, |
| int height) { |
| if (width >= 16) { |
| return aom_var_2d_u8_16xh_neon_dotprod(src, src_stride, width, height); |
| } |
| if (width >= 8) { |
| return aom_var_2d_u8_8xh_neon_dotprod(src, src_stride, width, height); |
| } |
| if (width >= 4 && height % 2 == 0) { |
| return aom_var_2d_u8_4xh_neon_dotprod(src, src_stride, width, height); |
| } |
| return aom_var_2d_u8_c(src, src_stride, width, height); |
| } |