1 ; 2 ; Copyright (c) 2010 The WebM project authors. All Rights Reserved. 3 ; 4 ; Use of this source code is governed by a BSD-style license 5 ; that can be found in the LICENSE file in the root of the source 6 ; tree. An additional intellectual property rights grant can be found 7 ; in the file PATENTS. All contributing project authors may 8 ; be found in the AUTHORS file in the root of the source tree. 9 ; 10 11 12 EXPORT |vp8_copy_mem16x16_v6| 13 ; ARM 14 ; REQUIRE8 15 ; PRESERVE8 16 17 AREA Block, CODE, READONLY ; name this block of code 18 ;void copy_mem16x16_v6( unsigned char *src, int src_stride, unsigned char *dst, int dst_stride) 19 ;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= 20 |vp8_copy_mem16x16_v6| PROC 21 stmdb sp!, {r4 - r7} 22 ;push {r4-r7} 23 24 ;preload 25 pld [r0, #31] ; preload for next 16x16 block 26 27 ands r4, r0, #15 28 beq copy_mem16x16_fast 29 30 ands r4, r0, #7 31 beq copy_mem16x16_8 32 33 ands r4, r0, #3 34 beq copy_mem16x16_4 35 36 ;copy one byte each time 37 ldrb r4, [r0] 38 ldrb r5, [r0, #1] 39 ldrb r6, [r0, #2] 40 ldrb r7, [r0, #3] 41 42 mov r12, #16 43 44 copy_mem16x16_1_loop 45 strb r4, [r2] 46 strb r5, [r2, #1] 47 strb r6, [r2, #2] 48 strb r7, [r2, #3] 49 50 ldrb r4, [r0, #4] 51 ldrb r5, [r0, #5] 52 ldrb r6, [r0, #6] 53 ldrb r7, [r0, #7] 54 55 subs r12, r12, #1 56 57 strb r4, [r2, #4] 58 strb r5, [r2, #5] 59 strb r6, [r2, #6] 60 strb r7, [r2, #7] 61 62 ldrb r4, [r0, #8] 63 ldrb r5, [r0, #9] 64 ldrb r6, [r0, #10] 65 ldrb r7, [r0, #11] 66 67 strb r4, [r2, #8] 68 strb r5, [r2, #9] 69 strb r6, [r2, #10] 70 strb r7, [r2, #11] 71 72 ldrb r4, [r0, #12] 73 ldrb r5, [r0, #13] 74 ldrb r6, [r0, #14] 75 ldrb r7, [r0, #15] 76 77 add r0, r0, r1 78 79 strb r4, [r2, #12] 80 strb r5, [r2, #13] 81 strb r6, [r2, #14] 82 strb r7, [r2, #15] 83 84 add r2, r2, r3 85 86 ldrneb r4, [r0] 87 ldrneb r5, [r0, #1] 88 ldrneb r6, [r0, #2] 89 ldrneb r7, [r0, #3] 90 91 pld [r0, #31] ; preload for next 16x16 block 92 93 bne copy_mem16x16_1_loop 94 95 ldmia sp!, {r4 - r7} 96 ;pop {r4-r7} 97 mov pc, lr 98 99 ;copy 4 bytes each time 100 copy_mem16x16_4 101 ldr r4, [r0] 102 ldr r5, [r0, #4] 103 ldr r6, [r0, #8] 104 ldr r7, [r0, #12] 105 106 mov r12, #16 107 108 copy_mem16x16_4_loop 109 subs r12, r12, #1 110 add r0, r0, r1 111 112 str r4, [r2] 113 str r5, [r2, #4] 114 str r6, [r2, #8] 115 str r7, [r2, #12] 116 117 add r2, r2, r3 118 119 ldrne r4, [r0] 120 ldrne r5, [r0, #4] 121 ldrne r6, [r0, #8] 122 ldrne r7, [r0, #12] 123 124 pld [r0, #31] ; preload for next 16x16 block 125 126 bne copy_mem16x16_4_loop 127 128 ldmia sp!, {r4 - r7} 129 ;pop {r4-r7} 130 mov pc, lr 131 132 ;copy 8 bytes each time 133 copy_mem16x16_8 134 sub r1, r1, #16 135 sub r3, r3, #16 136 137 mov r12, #16 138 139 copy_mem16x16_8_loop 140 ldmia r0!, {r4-r5} 141 ;ldm r0, {r4-r5} 142 ldmia r0!, {r6-r7} 143 144 add r0, r0, r1 145 146 stmia r2!, {r4-r5} 147 subs r12, r12, #1 148 ;stm r2, {r4-r5} 149 stmia r2!, {r6-r7} 150 151 add r2, r2, r3 152 153 pld [r0, #31] ; preload for next 16x16 block 154 bne copy_mem16x16_8_loop 155 156 ldmia sp!, {r4 - r7} 157 ;pop {r4-r7} 158 mov pc, lr 159 160 ;copy 16 bytes each time 161 copy_mem16x16_fast 162 ;sub r1, r1, #16 163 ;sub r3, r3, #16 164 165 mov r12, #16 166 167 copy_mem16x16_fast_loop 168 ldmia r0, {r4-r7} 169 ;ldm r0, {r4-r7} 170 add r0, r0, r1 171 172 subs r12, r12, #1 173 stmia r2, {r4-r7} 174 ;stm r2, {r4-r7} 175 add r2, r2, r3 176 177 pld [r0, #31] ; preload for next 16x16 block 178 bne copy_mem16x16_fast_loop 179 180 ldmia sp!, {r4 - r7} 181 ;pop {r4-r7} 182 mov pc, lr 183 184 ENDP ; |vp8_copy_mem16x16_v6| 185 186 END 187
