ref: 10fb9b94f4ca5df111b6a861141a18d436eff197
dir: /vpx_dsp/arm/sum_squares_neon.c/
/* * Copyright (c) 2018 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 <assert.h> #include "./vpx_dsp_rtcd.h" uint64_t vpx_sum_squares_2d_i16_neon(const int16_t *src, int stride, int size) { uint64x1_t s2; if (size == 4) { int16x4_t s[4]; int32x4_t s0; uint32x2_t s1; s[0] = vld1_s16(src + 0 * stride); s[1] = vld1_s16(src + 1 * stride); s[2] = vld1_s16(src + 2 * stride); s[3] = vld1_s16(src + 3 * stride); s0 = vmull_s16(s[0], s[0]); s0 = vmlal_s16(s0, s[1], s[1]); s0 = vmlal_s16(s0, s[2], s[2]); s0 = vmlal_s16(s0, s[3], s[3]); s1 = vpadd_u32(vget_low_u32(vreinterpretq_u32_s32(s0)), vget_high_u32(vreinterpretq_u32_s32(s0))); s2 = vpaddl_u32(s1); } else { int r = size; uint64x2_t s1 = vdupq_n_u64(0); do { int c = size; int32x4_t s0 = vdupq_n_s32(0); const int16_t *src_t = src; do { int16x8_t s[8]; s[0] = vld1q_s16(src_t + 0 * stride); s[1] = vld1q_s16(src_t + 1 * stride); s[2] = vld1q_s16(src_t + 2 * stride); s[3] = vld1q_s16(src_t + 3 * stride); s[4] = vld1q_s16(src_t + 4 * stride); s[5] = vld1q_s16(src_t + 5 * stride); s[6] = vld1q_s16(src_t + 6 * stride); s[7] = vld1q_s16(src_t + 7 * stride); s0 = vmlal_s16(s0, vget_low_s16(s[0]), vget_low_s16(s[0])); s0 = vmlal_s16(s0, vget_low_s16(s[1]), vget_low_s16(s[1])); s0 = vmlal_s16(s0, vget_low_s16(s[2]), vget_low_s16(s[2])); s0 = vmlal_s16(s0, vget_low_s16(s[3]), vget_low_s16(s[3])); s0 = vmlal_s16(s0, vget_low_s16(s[4]), vget_low_s16(s[4])); s0 = vmlal_s16(s0, vget_low_s16(s[5]), vget_low_s16(s[5])); s0 = vmlal_s16(s0, vget_low_s16(s[6]), vget_low_s16(s[6])); s0 = vmlal_s16(s0, vget_low_s16(s[7]), vget_low_s16(s[7])); s0 = vmlal_s16(s0, vget_high_s16(s[0]), vget_high_s16(s[0])); s0 = vmlal_s16(s0, vget_high_s16(s[1]), vget_high_s16(s[1])); s0 = vmlal_s16(s0, vget_high_s16(s[2]), vget_high_s16(s[2])); s0 = vmlal_s16(s0, vget_high_s16(s[3]), vget_high_s16(s[3])); s0 = vmlal_s16(s0, vget_high_s16(s[4]), vget_high_s16(s[4])); s0 = vmlal_s16(s0, vget_high_s16(s[5]), vget_high_s16(s[5])); s0 = vmlal_s16(s0, vget_high_s16(s[6]), vget_high_s16(s[6])); s0 = vmlal_s16(s0, vget_high_s16(s[7]), vget_high_s16(s[7])); src_t += 8; c -= 8; } while (c); s1 = vaddw_u32(s1, vget_low_u32(vreinterpretq_u32_s32(s0))); s1 = vaddw_u32(s1, vget_high_u32(vreinterpretq_u32_s32(s0))); src += 8 * stride; r -= 8; } while (r); s2 = vadd_u64(vget_low_u64(s1), vget_high_u64(s1)); } return vget_lane_u64(s2, 0); }