1//****************************************************************************** 2//* 3//* Copyright (C) 2015 The Android Open Source Project 4//* 5//* Licensed under the Apache License, Version 2.0 (the "License"); 6//* you may not use this file except in compliance with the License. 7//* You may obtain a copy of the License at: 8//* 9//* http://www.apache.org/licenses/LICENSE-2.0 10//* 11//* Unless required by applicable law or agreed to in writing, software 12//* distributed under the License is distributed on an "AS IS" BASIS, 13//* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14//* See the License for the specific language governing permissions and 15//* limitations under the License. 16//* 17//***************************************************************************** 18//* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore 19//*/ 20 21 22//****************************************************************************** 23//* 24//* 25//* @brief 26//* This file contains definitions of routines for SAD caclulation 27//* 28//* @author 29//* Ittiam 30//* 31//* @par List of Functions: 32//* - icv_sad_8x4_av8() 33//* 34//* @remarks 35//* None 36//* 37//******************************************************************************* 38 39 40//****************************************************************************** 41//* 42//* @brief computes distortion (SAD) between 2 8x4 blocks 43//* 44//* 45//* @par Description 46//* This functions computes SAD between 2 8x4 blocks. 47//* 48//* @param[in] pu1_src 49//* UWORD8 pointer to the source 50//* 51//* @param[out] pu1_ref 52//* UWORD8 pointer to the reference buffer 53//* 54//* @param[in] src_strd 55//* integer source stride 56//* 57//* @param[in] ref_strd 58//* integer reference stride 59//* 60//* @param[in] wd 61//* Width (assumed to be 8) 62//* 63//* @param[in] ht 64//* Height (assumed to be 4) 65//* 66//* @returns 67//* SAD value in r0 68//* 69//* @remarks 70//* 71//****************************************************************************** 72 73 .global icv_sad_8x4_av8 74 75icv_sad_8x4_av8: 76 77 // Load 8x4 source 78 ld1 {v0.8b}, [x0], x2 79 ld1 {v1.8b}, [x0], x2 80 ld1 {v2.8b}, [x0], x2 81 ld1 {v3.8b}, [x0], x2 82 83 // Load 8x4 reference 84 ld1 {v4.8b}, [x1], x3 85 ld1 {v5.8b}, [x1], x3 86 ld1 {v6.8b}, [x1], x3 87 ld1 {v7.8b}, [x1], x3 88 89 uabdl v0.8h, v0.8b, v4.8b 90 uabal v0.8h, v1.8b, v5.8b 91 uabal v0.8h, v2.8b, v6.8b 92 uabal v0.8h, v3.8b, v7.8b 93 94 addp v0.8h, v0.8h, v0.8h 95 addp v0.8h, v0.8h, v0.8h 96 addp v0.8h, v0.8h, v0.8h 97 98 smov x0, v0.h[0] 99 100 ret 101