ref: 780ada18aaf072bb46fd26d05f0075ed8514026d
dir: /vp8/common/arm/neon/dc_only_idct_add_neon.c/
/* * Copyright (c) 2014 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> void vp8_dc_only_idct_add_neon( int16_t input_dc, unsigned char *pred_ptr, int pred_stride, unsigned char *dst_ptr, int dst_stride) { int i; uint16_t a1 = ((input_dc + 4) >> 3); uint32x2_t d2u32 = vdup_n_u32(0); uint8x8_t d2u8; uint16x8_t q1u16; uint16x8_t qAdd; qAdd = vdupq_n_u16(a1); for (i = 0; i < 2; i++) { d2u32 = vld1_lane_u32((const uint32_t *)pred_ptr, d2u32, 0); pred_ptr += pred_stride; d2u32 = vld1_lane_u32((const uint32_t *)pred_ptr, d2u32, 1); pred_ptr += pred_stride; q1u16 = vaddw_u8(qAdd, vreinterpret_u8_u32(d2u32)); d2u8 = vqmovun_s16(vreinterpretq_s16_u16(q1u16)); vst1_lane_u32((uint32_t *)dst_ptr, vreinterpret_u32_u8(d2u8), 0); dst_ptr += dst_stride; vst1_lane_u32((uint32_t *)dst_ptr, vreinterpret_u32_u8(d2u8), 1); dst_ptr += dst_stride; } }