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_a9() 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_a9 74 75 icv_sad_8x4_a9: 76 77 push {lr} 78 79 vld1.8 d4, [r0], r2 80 vld1.8 d5, [r1], r3 81 82 vld1.8 d6, [r0], r2 83 vabdl.u8 q0, d5, d4 84 85 vld1.8 d7, [r1], r3 86 vabal.u8 q0, d7, d6 87 88 vld1.8 d4, [r0], r2 89 vld1.8 d5, [r1], r3 90 91 vld1.8 d6, [r0], r2 92 vabal.u8 q0, d5, d4 93 94 vld1.8 d7, [r1], r3 95 vabal.u8 q0, d7, d6 96 97 vadd.i16 d0, d1, d0 98 vpaddl.u16 d0, d0 99 vpaddl.u32 d0, d0 100 101 vmov.32 r0, d0[0] 102 103 pop {pc} 104
