1 ;// 2 ;// Copyright (C) 2007-2008 ARM Limited 3 ;// 4 ;// Licensed under the Apache License, Version 2.0 (the "License"); 5 ;// you may not use this file except in compliance with the License. 6 ;// You may obtain a copy of the License at 7 ;// 8 ;// http://www.apache.org/licenses/LICENSE-2.0 9 ;// 10 ;// Unless required by applicable law or agreed to in writing, software 11 ;// distributed under the License is distributed on an "AS IS" BASIS, 12 ;// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 ;// See the License for the specific language governing permissions and 14 ;// limitations under the License. 15 ;// 16 ;// 17 ;// 18 ;// File Name: omxVCM4P2_FindMVpred_s.s 19 ;// OpenMAX DL: v1.0.2 20 ;// Revision: 9641 21 ;// Date: Thursday, February 7, 2008 22 ;// 23 ;// 24 ;// 25 ;// 26 27 ;// Function: 28 ;// omxVCM4P2_FindMVpred 29 ;// 30 ;// Include headers 31 INCLUDE omxtypes_s.h 32 INCLUDE armCOMM_s.h 33 INCLUDE armVCCOMM_s.h 34 35 ;// Define cpu variants 36 M_VARIANTS ARM1136JS 37 38 39 IF ARM1136JS 40 41 M_TABLE armVCM4P2_pBlkIndexTable 42 DCD OMXVCBlk0, OMXVCBlk1 43 DCD OMXVCBlk2, OMXVCBlk3 44 45 ;//-------------------------------------------- 46 ;// Declare input registers 47 ;//-------------------------------------------- 48 49 pSrcMVCurMB RN 0 50 pSrcCandMV1 RN 1 51 pSrcCandMV2 RN 2 52 pSrcCandMV3 RN 3 53 pDstMVPred RN 4 54 pDstMVPredME RN 5 55 iBlk RN 6 56 57 pTable RN 4 58 CandMV RN 12 59 60 pCandMV1 RN 7 61 pCandMV2 RN 8 62 pCandMV3 RN 9 63 64 CandMV1dx RN 0 65 CandMV1dy RN 1 66 CandMV2dx RN 2 67 CandMV2dy RN 3 68 CandMV3dx RN 10 69 CandMV3dy RN 11 70 71 temp RN 14 72 73 zero RN 14 74 return RN 0 75 76 ; ---------------------------------------------- 77 ; Main routine 78 ; ---------------------------------------------- 79 80 M_ALLOC4 MV, 4 81 82 ;// Function header 83 M_START omxVCM4P2_FindMVpred, r11 84 85 ;// Define stack arguments 86 M_ARG ppDstMVPred, 4 87 M_ARG ppDstMVPredME, 4 88 M_ARG Blk, 4 89 90 M_ADR CandMV, MV 91 MOV zero, #0 92 M_LDR iBlk, Blk 93 94 ;// Set the default value for these 95 ;// to be used if pSrcCandMV[1|2|3] == NULL 96 MOV pCandMV1, CandMV 97 MOV pCandMV2, CandMV 98 MOV pCandMV3, CandMV 99 100 STR zero, [CandMV] 101 102 ;// Branch to the case based on blk number 103 M_SWITCH iBlk 104 M_CASE OMXVCBlk0 ;// iBlk=0 105 M_CASE OMXVCBlk1 ;// iBlk=0 106 M_CASE OMXVCBlk2 ;// iBlk=0 107 M_CASE OMXVCBlk3 ;// iBlk=0 108 M_ENDSWITCH 109 110 OMXVCBlk0 111 CMP pSrcCandMV1, #0 112 ADDNE pCandMV1, pSrcCandMV1, #4 113 114 CMP pSrcCandMV2, #0 115 ADDNE pCandMV2, pSrcCandMV2, #8 116 117 CMP pSrcCandMV3, #0 118 ADDNE pCandMV3, pSrcCandMV3, #8 119 CMPEQ pSrcCandMV1, #0 120 121 MOVEQ pCandMV3, pCandMV2 122 MOVEQ pCandMV1, pCandMV2 123 124 CMP pSrcCandMV1, #0 125 CMPEQ pSrcCandMV2, #0 126 127 MOVEQ pCandMV1, pCandMV3 128 MOVEQ pCandMV2, pCandMV3 129 130 CMP pSrcCandMV2, #0 131 CMPEQ pSrcCandMV3, #0 132 133 MOVEQ pCandMV2, pCandMV1 134 MOVEQ pCandMV3, pCandMV1 135 136 B BlkEnd 137 138 OMXVCBlk1 139 MOV pCandMV1, pSrcMVCurMB 140 CMP pSrcCandMV3, #0 141 ADDNE pCandMV3, pSrcCandMV3, #8 142 143 CMP pSrcCandMV2, #0 144 ADDNE pCandMV2, pSrcCandMV2, #12 145 146 CMPEQ pSrcCandMV3, #0 147 148 MOVEQ pCandMV2, pCandMV1 149 MOVEQ pCandMV3, pCandMV1 150 151 B BlkEnd 152 153 OMXVCBlk2 154 CMP pSrcCandMV1, #0 155 MOV pCandMV2, pSrcMVCurMB 156 ADD pCandMV3, pSrcMVCurMB, #4 157 ADDNE pCandMV1, pSrcCandMV1, #12 158 B BlkEnd 159 160 OMXVCBlk3 161 ADD pCandMV1, pSrcMVCurMB, #8 162 MOV pCandMV2, pSrcMVCurMB 163 ADD pCandMV3, pSrcMVCurMB, #4 164 165 BlkEnd 166 167 ;// Using the transperancy info, zero 168 ;// out the candidate MV if neccesary 169 LDRSH CandMV1dx, [pCandMV1], #2 170 LDRSH CandMV2dx, [pCandMV2], #2 171 LDRSH CandMV3dx, [pCandMV3], #2 172 173 ;// Load argument from the stack 174 M_LDR pDstMVPredME, ppDstMVPredME 175 176 LDRSH CandMV1dy, [pCandMV1] 177 LDRSH CandMV2dy, [pCandMV2] 178 LDRSH CandMV3dy, [pCandMV3] 179 180 CMP pDstMVPredME, #0 181 182 ;// Store the candidate MV's into the pDstMVPredME, 183 ;// these can be used in the fast algorithm if implemented 184 185 STRHNE CandMV1dx, [pDstMVPredME], #2 186 STRHNE CandMV1dy, [pDstMVPredME], #2 187 STRHNE CandMV2dx, [pDstMVPredME], #2 188 STRHNE CandMV2dy, [pDstMVPredME], #2 189 STRHNE CandMV3dx, [pDstMVPredME], #2 190 STRHNE CandMV3dy, [pDstMVPredME] 191 192 ; Find the median of the 3 candidate MV's 193 M_MEDIAN3 CandMV1dx, CandMV2dx, CandMV3dx, temp 194 195 ;// Load argument from the stack 196 M_LDR pDstMVPred, ppDstMVPred 197 198 M_MEDIAN3 CandMV1dy, CandMV2dy, CandMV3dy, temp 199 200 STRH CandMV3dx, [pDstMVPred], #2 201 STRH CandMV3dy, [pDstMVPred] 202 203 MOV return, #OMX_Sts_NoErr 204 205 M_END 206 ENDIF ;// ARM1136JS :LOR: CortexA8 207 208 END 209
