1 @/* 2 @ ** Copyright 2003-2010, VisualOn, Inc. 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: AutoCorrelation_v5.s 19 @ 20 @ Content: AutoCorrelation function armv5 assemble 21 @ 22 @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 23 24 25 .section .text 26 .global AutoCorrelation 27 28 AutoCorrelation: 29 stmdb sp!, {r4 - r11, lr} 30 31 sub r13, r13, #20 32 33 mov r5, r0 34 mov r7, r1 35 mov r9, r3 36 mov r2, r2, lsl #16 37 mov r0, #0 38 mov r4, r2, asr #16 39 mov r8, #0 40 cmp r4, #0 41 ble L136 42 43 cmp r4, #8 44 mov r2, #0 45 blt L133 46 47 sub r12, r4, #8 48 L132: 49 ldr r6, [r5, r2] 50 add r2, r2, #4 51 smulbb r3, r6, r6 52 ldr r1, [r5, r2] 53 smultt r10, r6, r6 54 mov r3, r3, asr #9 55 smulbb r6, r1, r1 56 mov r10, r10, asr #9 57 qadd r0, r0, r3 58 smultt r11, r1, r1 59 add r2, r2, #4 60 qadd r0, r0, r10 61 mov r6, r6, asr #9 62 mov r11, r11, asr #9 63 ldr r1, [r5, r2] 64 qadd r0, r0, r6 65 smulbb r10, r1, r1 66 smultt r6, r1, r1 67 qadd r0, r0, r11 68 mov r10, r10, asr #9 69 mov r6, r6, asr #9 70 qadd r0, r0, r10 71 add r2, r2, #4 72 add r8, r8, #6 73 74 qadd r0, r0, r6 75 cmp r8, r12 76 blt L132 77 L133: 78 ldrsh r6, [r5, r2] 79 mul r10, r6, r6 80 add r2, r2, #2 81 mov r1, r10, asr #9 82 qadd r0, r0, r1 83 L134: 84 add r8, r8, #1 85 cmp r8, r4 86 blt L133 87 L135: 88 L136: 89 str r0, [r7, #0] 90 cmp r0, #0 91 beq L1320 92 L137: 93 mov r2, r9, lsl #16 94 mov r8, #1 95 mov r2, r2, asr #16 96 cmp r2, #1 97 ble L1319 98 L138: 99 L139: 100 sub r4, r4, #1 101 mov r14, #0 102 mov r3, #0 103 cmp r4, #0 104 ble L1317 105 L1310: 106 cmp r4, #6 107 addlt r6, r5, r8, lsl #1 108 blt L1314 109 L1311: 110 add r6, r5, r8, lsl #1 111 sub r12, r4, #6 112 str r8, [r13, #8] 113 str r7, [r13, #4] 114 L1312: 115 mov r1, r3, lsl #1 116 ldrsh r7, [r6, r1] 117 ldrsh r10, [r5, r1] 118 add r8, r1, r6 119 add r9, r5, r1 120 mul r7, r10, r7 121 ldrsh r1, [r8, #2] 122 ldrsh r10, [r8, #4] 123 add r7, r14, r7, asr #9 124 ldrsh r0, [r9, #2] 125 ldrsh r11, [r9, #4] 126 mul r1, r0, r1 127 ldrsh r14, [r8, #6] 128 mul r10, r11, r10 129 add r7, r7, r1, asr #9 130 ldrsh r8, [r8, #8] 131 add r3, r3, #5 132 ldrsh r11, [r9, #6] 133 ldrsh r1, [r9, #8] 134 mul r14, r11, r14 135 add r7, r7, r10, asr #9 136 mul r1, r1, r8 137 add r14, r7, r14, asr #9 138 cmp r3, r12 139 add r14, r14, r1, asr #9 140 ble L1312 141 L1313: 142 ldr r8, [r13, #8] 143 ldr r7, [r13, #4] 144 L1314: 145 L1315: 146 mov r12, r3, lsl #1 147 ldrsh r9, [r6, r12] 148 ldrsh r12, [r5, r12] 149 add r3, r3, #1 150 cmp r3, r4 151 mul r12, r12, r9 152 add r14, r14, r12, asr #9 153 blt L1315 154 L1316: 155 L1317: 156 str r14, [r7, +r8, lsl #2] 157 add r8, r8, #1 158 cmp r8, r2 159 blt L139 160 161 L1319: 162 L1320: 163 add r13, r13, #20 164 ldmia sp!, {r4 - r11, pc} 165 166 @ENDP @ |AutoCorrelation| 167 .end 168
