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Diffstat (limited to '')
-rw-r--r-- | third_party/aom/aom_dsp/arm/sum_squares_neon.c | 574 |
1 files changed, 574 insertions, 0 deletions
diff --git a/third_party/aom/aom_dsp/arm/sum_squares_neon.c b/third_party/aom/aom_dsp/arm/sum_squares_neon.c new file mode 100644 index 0000000000..424b2b4445 --- /dev/null +++ b/third_party/aom/aom_dsp/arm/sum_squares_neon.c @@ -0,0 +1,574 @@ +/* + * Copyright (c) 2020, 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_sum_squares_2d_i16_4x4_neon(const int16_t *src, + int stride) { + int16x4_t s0 = vld1_s16(src + 0 * stride); + int16x4_t s1 = vld1_s16(src + 1 * stride); + int16x4_t s2 = vld1_s16(src + 2 * stride); + int16x4_t s3 = vld1_s16(src + 3 * stride); + + int32x4_t sum_squares = vmull_s16(s0, s0); + sum_squares = vmlal_s16(sum_squares, s1, s1); + sum_squares = vmlal_s16(sum_squares, s2, s2); + sum_squares = vmlal_s16(sum_squares, s3, s3); + + return horizontal_long_add_u32x4(vreinterpretq_u32_s32(sum_squares)); +} + +static INLINE uint64_t aom_sum_squares_2d_i16_4xn_neon(const int16_t *src, + int stride, int height) { + int32x4_t sum_squares[2] = { vdupq_n_s32(0), vdupq_n_s32(0) }; + + int h = height; + do { + int16x4_t s0 = vld1_s16(src + 0 * stride); + int16x4_t s1 = vld1_s16(src + 1 * stride); + int16x4_t s2 = vld1_s16(src + 2 * stride); + int16x4_t s3 = vld1_s16(src + 3 * stride); + + sum_squares[0] = vmlal_s16(sum_squares[0], s0, s0); + sum_squares[0] = vmlal_s16(sum_squares[0], s1, s1); + sum_squares[1] = vmlal_s16(sum_squares[1], s2, s2); + sum_squares[1] = vmlal_s16(sum_squares[1], s3, s3); + + src += 4 * stride; + h -= 4; + } while (h != 0); + + return horizontal_long_add_u32x4( + vreinterpretq_u32_s32(vaddq_s32(sum_squares[0], sum_squares[1]))); +} + +static INLINE uint64_t aom_sum_squares_2d_i16_nxn_neon(const int16_t *src, + int stride, int width, + int height) { + uint64x2_t sum_squares = vdupq_n_u64(0); + + int h = height; + do { + int32x4_t ss_row[2] = { vdupq_n_s32(0), vdupq_n_s32(0) }; + int w = 0; + do { + const int16_t *s = src + w; + int16x8_t s0 = vld1q_s16(s + 0 * stride); + int16x8_t s1 = vld1q_s16(s + 1 * stride); + int16x8_t s2 = vld1q_s16(s + 2 * stride); + int16x8_t s3 = vld1q_s16(s + 3 * stride); + + ss_row[0] = vmlal_s16(ss_row[0], vget_low_s16(s0), vget_low_s16(s0)); + ss_row[0] = vmlal_s16(ss_row[0], vget_low_s16(s1), vget_low_s16(s1)); + ss_row[0] = vmlal_s16(ss_row[0], vget_low_s16(s2), vget_low_s16(s2)); + ss_row[0] = vmlal_s16(ss_row[0], vget_low_s16(s3), vget_low_s16(s3)); + ss_row[1] = vmlal_s16(ss_row[1], vget_high_s16(s0), vget_high_s16(s0)); + ss_row[1] = vmlal_s16(ss_row[1], vget_high_s16(s1), vget_high_s16(s1)); + ss_row[1] = vmlal_s16(ss_row[1], vget_high_s16(s2), vget_high_s16(s2)); + ss_row[1] = vmlal_s16(ss_row[1], vget_high_s16(s3), vget_high_s16(s3)); + w += 8; + } while (w < width); + + sum_squares = vpadalq_u32( + sum_squares, vreinterpretq_u32_s32(vaddq_s32(ss_row[0], ss_row[1]))); + + src += 4 * stride; + h -= 4; + } while (h != 0); + + return horizontal_add_u64x2(sum_squares); +} + +uint64_t aom_sum_squares_2d_i16_neon(const int16_t *src, int stride, int width, + int height) { + // 4 elements per row only requires half an SIMD register, so this + // must be a special case, but also note that over 75% of all calls + // are with size == 4, so it is also the common case. + if (LIKELY(width == 4 && height == 4)) { + return aom_sum_squares_2d_i16_4x4_neon(src, stride); + } else if (LIKELY(width == 4 && (height & 3) == 0)) { + return aom_sum_squares_2d_i16_4xn_neon(src, stride, height); + } else if (LIKELY((width & 7) == 0 && (height & 3) == 0)) { + // Generic case + return aom_sum_squares_2d_i16_nxn_neon(src, stride, width, height); + } else { + return aom_sum_squares_2d_i16_c(src, stride, width, height); + } +} + +static INLINE uint64_t aom_sum_sse_2d_i16_4x4_neon(const int16_t *src, + int stride, int *sum) { + int16x4_t s0 = vld1_s16(src + 0 * stride); + int16x4_t s1 = vld1_s16(src + 1 * stride); + int16x4_t s2 = vld1_s16(src + 2 * stride); + int16x4_t s3 = vld1_s16(src + 3 * stride); + + int32x4_t sse = vmull_s16(s0, s0); + sse = vmlal_s16(sse, s1, s1); + sse = vmlal_s16(sse, s2, s2); + sse = vmlal_s16(sse, s3, s3); + + int32x4_t sum_01 = vaddl_s16(s0, s1); + int32x4_t sum_23 = vaddl_s16(s2, s3); + *sum += horizontal_add_s32x4(vaddq_s32(sum_01, sum_23)); + + return horizontal_long_add_u32x4(vreinterpretq_u32_s32(sse)); +} + +static INLINE uint64_t aom_sum_sse_2d_i16_4xn_neon(const int16_t *src, + int stride, int height, + int *sum) { + int32x4_t sse[2] = { vdupq_n_s32(0), vdupq_n_s32(0) }; + int32x2_t sum_acc[2] = { vdup_n_s32(0), vdup_n_s32(0) }; + + int h = height; + do { + int16x4_t s0 = vld1_s16(src + 0 * stride); + int16x4_t s1 = vld1_s16(src + 1 * stride); + int16x4_t s2 = vld1_s16(src + 2 * stride); + int16x4_t s3 = vld1_s16(src + 3 * stride); + + sse[0] = vmlal_s16(sse[0], s0, s0); + sse[0] = vmlal_s16(sse[0], s1, s1); + sse[1] = vmlal_s16(sse[1], s2, s2); + sse[1] = vmlal_s16(sse[1], s3, s3); + + sum_acc[0] = vpadal_s16(sum_acc[0], s0); + sum_acc[0] = vpadal_s16(sum_acc[0], s1); + sum_acc[1] = vpadal_s16(sum_acc[1], s2); + sum_acc[1] = vpadal_s16(sum_acc[1], s3); + + src += 4 * stride; + h -= 4; + } while (h != 0); + + *sum += horizontal_add_s32x4(vcombine_s32(sum_acc[0], sum_acc[1])); + return horizontal_long_add_u32x4( + vreinterpretq_u32_s32(vaddq_s32(sse[0], sse[1]))); +} + +static INLINE uint64_t aom_sum_sse_2d_i16_nxn_neon(const int16_t *src, + int stride, int width, + int height, int *sum) { + uint64x2_t sse = vdupq_n_u64(0); + int32x4_t sum_acc = vdupq_n_s32(0); + + int h = height; + do { + int32x4_t sse_row[2] = { vdupq_n_s32(0), vdupq_n_s32(0) }; + int w = 0; + do { + const int16_t *s = src + w; + int16x8_t s0 = vld1q_s16(s + 0 * stride); + int16x8_t s1 = vld1q_s16(s + 1 * stride); + int16x8_t s2 = vld1q_s16(s + 2 * stride); + int16x8_t s3 = vld1q_s16(s + 3 * stride); + + sse_row[0] = vmlal_s16(sse_row[0], vget_low_s16(s0), vget_low_s16(s0)); + sse_row[0] = vmlal_s16(sse_row[0], vget_low_s16(s1), vget_low_s16(s1)); + sse_row[0] = vmlal_s16(sse_row[0], vget_low_s16(s2), vget_low_s16(s2)); + sse_row[0] = vmlal_s16(sse_row[0], vget_low_s16(s3), vget_low_s16(s3)); + sse_row[1] = vmlal_s16(sse_row[1], vget_high_s16(s0), vget_high_s16(s0)); + sse_row[1] = vmlal_s16(sse_row[1], vget_high_s16(s1), vget_high_s16(s1)); + sse_row[1] = vmlal_s16(sse_row[1], vget_high_s16(s2), vget_high_s16(s2)); + sse_row[1] = vmlal_s16(sse_row[1], vget_high_s16(s3), vget_high_s16(s3)); + + sum_acc = vpadalq_s16(sum_acc, s0); + sum_acc = vpadalq_s16(sum_acc, s1); + sum_acc = vpadalq_s16(sum_acc, s2); + sum_acc = vpadalq_s16(sum_acc, s3); + + w += 8; + } while (w < width); + + sse = vpadalq_u32(sse, + vreinterpretq_u32_s32(vaddq_s32(sse_row[0], sse_row[1]))); + + src += 4 * stride; + h -= 4; + } while (h != 0); + + *sum += horizontal_add_s32x4(sum_acc); + return horizontal_add_u64x2(sse); +} + +uint64_t aom_sum_sse_2d_i16_neon(const int16_t *src, int stride, int width, + int height, int *sum) { + uint64_t sse; + + if (LIKELY(width == 4 && height == 4)) { + sse = aom_sum_sse_2d_i16_4x4_neon(src, stride, sum); + } else if (LIKELY(width == 4 && (height & 3) == 0)) { + // width = 4, height is a multiple of 4. + sse = aom_sum_sse_2d_i16_4xn_neon(src, stride, height, sum); + } else if (LIKELY((width & 7) == 0 && (height & 3) == 0)) { + // Generic case - width is multiple of 8, height is multiple of 4. + sse = aom_sum_sse_2d_i16_nxn_neon(src, stride, width, height, sum); + } else { + sse = aom_sum_sse_2d_i16_c(src, stride, width, height, sum); + } + + return sse; +} + +static INLINE uint64_t aom_sum_squares_i16_4xn_neon(const int16_t *src, + uint32_t n) { + uint64x2_t sum_u64 = vdupq_n_u64(0); + + int i = n; + do { + uint32x4_t sum; + int16x4_t s0 = vld1_s16(src); + + sum = vreinterpretq_u32_s32(vmull_s16(s0, s0)); + + sum_u64 = vpadalq_u32(sum_u64, sum); + + src += 4; + i -= 4; + } while (i >= 4); + + if (i > 0) { + return horizontal_add_u64x2(sum_u64) + aom_sum_squares_i16_c(src, i); + } + return horizontal_add_u64x2(sum_u64); +} + +static INLINE uint64_t aom_sum_squares_i16_8xn_neon(const int16_t *src, + uint32_t n) { + uint64x2_t sum_u64[2] = { vdupq_n_u64(0), vdupq_n_u64(0) }; + + int i = n; + do { + uint32x4_t sum[2]; + int16x8_t s0 = vld1q_s16(src); + + sum[0] = + vreinterpretq_u32_s32(vmull_s16(vget_low_s16(s0), vget_low_s16(s0))); + sum[1] = + vreinterpretq_u32_s32(vmull_s16(vget_high_s16(s0), vget_high_s16(s0))); + + sum_u64[0] = vpadalq_u32(sum_u64[0], sum[0]); + sum_u64[1] = vpadalq_u32(sum_u64[1], sum[1]); + + src += 8; + i -= 8; + } while (i >= 8); + + if (i > 0) { + return horizontal_add_u64x2(vaddq_u64(sum_u64[0], sum_u64[1])) + + aom_sum_squares_i16_c(src, i); + } + return horizontal_add_u64x2(vaddq_u64(sum_u64[0], sum_u64[1])); +} + +uint64_t aom_sum_squares_i16_neon(const int16_t *src, uint32_t n) { + // This function seems to be called only for values of N >= 64. See + // av1/encoder/compound_type.c. + if (LIKELY(n >= 8)) { + return aom_sum_squares_i16_8xn_neon(src, n); + } + if (n >= 4) { + return aom_sum_squares_i16_4xn_neon(src, n); + } + return aom_sum_squares_i16_c(src, n); +} + +static INLINE uint64_t aom_var_2d_u8_4xh_neon(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); + uint32x4_t sse_u32 = vdupq_n_u32(0); + + // 255*256 = 65280, so we can accumulate up to 256 8-bit elements in a 16-bit + // element before we need to accumulate to 32-bit elements. Since we're + // accumulating in uint16x4_t vectors, this means we can accumulate up to 4 + // rows of 256 elements. Therefore the limit can be computed as: h_limit = (4 + // * 256) / width. + int h_limit = (4 * 256) / width; + int h_tmp = height > h_limit ? h_limit : height; + + int h = 0; + do { + uint16x4_t sum_u16 = vdup_n_u16(0); + do { + uint8_t *src_ptr = src; + int w = width; + do { + uint8x8_t s0 = load_unaligned_u8(src_ptr, src_stride); + + sum_u16 = vpadal_u8(sum_u16, s0); + + uint16x8_t sse_u16 = vmull_u8(s0, s0); + + sse_u32 = vpadalq_u16(sse_u32, sse_u16); + + 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; + h += 2; + } while (h < h_tmp && h < height); + + sum_u32 = vpadal_u16(sum_u32, sum_u16); + h_tmp += h_limit; + } while (h < height); + + sum += horizontal_long_add_u32x2(sum_u32); + sse += horizontal_long_add_u32x4(sse_u32); + + return sse - sum * sum / (width * height); +} + +static INLINE uint64_t aom_var_2d_u8_8xh_neon(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); + uint32x4_t sse_u32 = vdupq_n_u32(0); + + // 255*256 = 65280, so we can accumulate up to 256 8-bit elements in a 16-bit + // element before we need to accumulate to 32-bit elements. Since we're + // accumulating in uint16x4_t vectors, this means we can accumulate up to 4 + // rows of 256 elements. Therefore the limit can be computed as: h_limit = (4 + // * 256) / width. + int h_limit = (4 * 256) / width; + int h_tmp = height > h_limit ? h_limit : height; + + int h = 0; + do { + uint16x4_t sum_u16 = vdup_n_u16(0); + do { + uint8_t *src_ptr = src; + int w = width; + do { + uint8x8_t s0 = vld1_u8(src_ptr); + + sum_u16 = vpadal_u8(sum_u16, s0); + + uint16x8_t sse_u16 = vmull_u8(s0, s0); + + sse_u32 = vpadalq_u16(sse_u32, sse_u16); + + 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; + ++h; + } while (h < h_tmp && h < height); + + sum_u32 = vpadal_u16(sum_u32, sum_u16); + h_tmp += h_limit; + } while (h < height); + + sum += horizontal_long_add_u32x2(sum_u32); + sse += horizontal_long_add_u32x4(sse_u32); + + return sse - sum * sum / (width * height); +} + +static INLINE uint64_t aom_var_2d_u8_16xh_neon(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[2] = { vdupq_n_u32(0), vdupq_n_u32(0) }; + + // 255*256 = 65280, so we can accumulate up to 256 8-bit elements in a 16-bit + // element before we need to accumulate to 32-bit elements. Since we're + // accumulating in uint16x8_t vectors, this means we can accumulate up to 8 + // rows of 256 elements. Therefore the limit can be computed as: h_limit = (8 + // * 256) / width. + int h_limit = (8 * 256) / width; + int h_tmp = height > h_limit ? h_limit : height; + + int h = 0; + do { + uint16x8_t sum_u16 = vdupq_n_u16(0); + do { + int w = width; + uint8_t *src_ptr = src; + do { + uint8x16_t s0 = vld1q_u8(src_ptr); + + sum_u16 = vpadalq_u8(sum_u16, s0); + + uint16x8_t sse_u16_lo = vmull_u8(vget_low_u8(s0), vget_low_u8(s0)); + uint16x8_t sse_u16_hi = vmull_u8(vget_high_u8(s0), vget_high_u8(s0)); + + sse_u32[0] = vpadalq_u16(sse_u32[0], sse_u16_lo); + sse_u32[1] = vpadalq_u16(sse_u32[1], sse_u16_hi); + + 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; + ++h; + } while (h < h_tmp && h < height); + + sum_u32 = vpadalq_u16(sum_u32, sum_u16); + h_tmp += h_limit; + } while (h < height); + + sum += horizontal_long_add_u32x4(sum_u32); + sse += horizontal_long_add_u32x4(vaddq_u32(sse_u32[0], sse_u32[1])); + + return sse - sum * sum / (width * height); +} + +uint64_t aom_var_2d_u8_neon(uint8_t *src, int src_stride, int width, + int height) { + if (width >= 16) { + return aom_var_2d_u8_16xh_neon(src, src_stride, width, height); + } + if (width >= 8) { + return aom_var_2d_u8_8xh_neon(src, src_stride, width, height); + } + if (width >= 4 && height % 2 == 0) { + return aom_var_2d_u8_4xh_neon(src, src_stride, width, height); + } + return aom_var_2d_u8_c(src, src_stride, width, height); +} + +static INLINE uint64_t aom_var_2d_u16_4xh_neon(uint8_t *src, int src_stride, + int width, int height) { + uint16_t *src_u16 = CONVERT_TO_SHORTPTR(src); + uint64_t sum = 0; + uint64_t sse = 0; + uint32x2_t sum_u32 = vdup_n_u32(0); + uint64x2_t sse_u64 = vdupq_n_u64(0); + + int h = height; + do { + int w = width; + uint16_t *src_ptr = src_u16; + do { + uint16x4_t s0 = vld1_u16(src_ptr); + + sum_u32 = vpadal_u16(sum_u32, s0); + + uint32x4_t sse_u32 = vmull_u16(s0, s0); + + sse_u64 = vpadalq_u32(sse_u64, sse_u32); + + src_ptr += 4; + w -= 4; + } while (w >= 4); + + // Process remaining columns in the row using C. + while (w > 0) { + int idx = width - w; + const uint16_t v = src_u16[idx]; + sum += v; + sse += v * v; + w--; + } + + src_u16 += src_stride; + } while (--h != 0); + + sum += horizontal_long_add_u32x2(sum_u32); + sse += horizontal_add_u64x2(sse_u64); + + return sse - sum * sum / (width * height); +} + +static INLINE uint64_t aom_var_2d_u16_8xh_neon(uint8_t *src, int src_stride, + int width, int height) { + uint16_t *src_u16 = CONVERT_TO_SHORTPTR(src); + uint64_t sum = 0; + uint64_t sse = 0; + uint32x4_t sum_u32 = vdupq_n_u32(0); + uint64x2_t sse_u64[2] = { vdupq_n_u64(0), vdupq_n_u64(0) }; + + int h = height; + do { + int w = width; + uint16_t *src_ptr = src_u16; + do { + uint16x8_t s0 = vld1q_u16(src_ptr); + + sum_u32 = vpadalq_u16(sum_u32, s0); + + uint32x4_t sse_u32_lo = vmull_u16(vget_low_u16(s0), vget_low_u16(s0)); + uint32x4_t sse_u32_hi = vmull_u16(vget_high_u16(s0), vget_high_u16(s0)); + + sse_u64[0] = vpadalq_u32(sse_u64[0], sse_u32_lo); + sse_u64[1] = vpadalq_u32(sse_u64[1], sse_u32_hi); + + src_ptr += 8; + w -= 8; + } while (w >= 8); + + // Process remaining columns in the row using C. + while (w > 0) { + int idx = width - w; + const uint16_t v = src_u16[idx]; + sum += v; + sse += v * v; + w--; + } + + src_u16 += src_stride; + } while (--h != 0); + + sum += horizontal_long_add_u32x4(sum_u32); + sse += horizontal_add_u64x2(vaddq_u64(sse_u64[0], sse_u64[1])); + + return sse - sum * sum / (width * height); +} + +uint64_t aom_var_2d_u16_neon(uint8_t *src, int src_stride, int width, + int height) { + if (width >= 8) { + return aom_var_2d_u16_8xh_neon(src, src_stride, width, height); + } + if (width >= 4) { + return aom_var_2d_u16_4xh_neon(src, src_stride, width, height); + } + return aom_var_2d_u16_c(src, src_stride, width, height); +} |