1; 2; Copyright (c) 2011 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_subtract_mby_armv6| 13 EXPORT |vp8_subtract_mbuv_armv6| 14 EXPORT |vp8_subtract_b_armv6| 15 16 INCLUDE asm_enc_offsets.asm 17 18 ARM 19 REQUIRE8 20 PRESERVE8 21 22 AREA ||.text||, CODE, READONLY, ALIGN=2 23 24; r0 BLOCK *be 25; r1 BLOCKD *bd 26; r2 int pitch 27|vp8_subtract_b_armv6| PROC 28 29 stmfd sp!, {r4-r9} 30 31 ldr r4, [r0, #vp8_block_base_src] 32 ldr r5, [r0, #vp8_block_src] 33 ldr r6, [r0, #vp8_block_src_diff] 34 35 ldr r3, [r4] 36 ldr r7, [r0, #vp8_block_src_stride] 37 add r3, r3, r5 ; src = *base_src + src 38 ldr r8, [r1, #vp8_blockd_predictor] 39 40 mov r9, #4 ; loop count 41 42loop_block 43 44 ldr r0, [r3], r7 ; src 45 ldr r1, [r8], r2 ; pred 46 47 uxtb16 r4, r0 ; [s2 | s0] 48 uxtb16 r5, r1 ; [p2 | p0] 49 uxtb16 r0, r0, ror #8 ; [s3 | s1] 50 uxtb16 r1, r1, ror #8 ; [p3 | p1] 51 52 usub16 r4, r4, r5 ; [d2 | d0] 53 usub16 r5, r0, r1 ; [d3 | d1] 54 55 subs r9, r9, #1 ; decrement loop counter 56 57 pkhbt r0, r4, r5, lsl #16 ; [d1 | d0] 58 pkhtb r1, r5, r4, asr #16 ; [d3 | d2] 59 60 str r0, [r6, #0] ; diff 61 str r1, [r6, #4] ; diff 62 63 add r6, r6, r2, lsl #1 ; update diff pointer 64 bne loop_block 65 66 ldmfd sp!, {r4-r9} 67 mov pc, lr 68 69 ENDP 70 71 72; r0 short *diff 73; r1 unsigned char *usrc 74; r2 unsigned char *vsrc 75; r3 unsigned char *pred 76; stack int stride 77|vp8_subtract_mbuv_armv6| PROC 78 79 stmfd sp!, {r4-r12, lr} 80 81 add r0, r0, #512 ; set *diff point to Cb 82 add r3, r3, #256 ; set *pred point to Cb 83 84 mov r4, #8 ; loop count 85 ldr r5, [sp, #40] ; stride 86 87 ; Subtract U block 88loop_u 89 ldr r6, [r1] ; src (A) 90 ldr r7, [r3], #4 ; pred (A) 91 92 uxtb16 r8, r6 ; [s2 | s0] (A) 93 uxtb16 r9, r7 ; [p2 | p0] (A) 94 uxtb16 r10, r6, ror #8 ; [s3 | s1] (A) 95 uxtb16 r11, r7, ror #8 ; [p3 | p1] (A) 96 97 usub16 r6, r8, r9 ; [d2 | d0] (A) 98 usub16 r7, r10, r11 ; [d3 | d1] (A) 99 100 ldr r10, [r1, #4] ; src (B) 101 ldr r11, [r3], #4 ; pred (B) 102 103 pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (A) 104 pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (A) 105 106 str r8, [r0], #4 ; diff (A) 107 uxtb16 r8, r10 ; [s2 | s0] (B) 108 str r9, [r0], #4 ; diff (A) 109 110 uxtb16 r9, r11 ; [p2 | p0] (B) 111 uxtb16 r10, r10, ror #8 ; [s3 | s1] (B) 112 uxtb16 r11, r11, ror #8 ; [p3 | p1] (B) 113 114 usub16 r6, r8, r9 ; [d2 | d0] (B) 115 usub16 r7, r10, r11 ; [d3 | d1] (B) 116 117 add r1, r1, r5 ; update usrc pointer 118 119 pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (B) 120 pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (B) 121 122 str r8, [r0], #4 ; diff (B) 123 subs r4, r4, #1 ; update loop counter 124 str r9, [r0], #4 ; diff (B) 125 126 bne loop_u 127 128 mov r4, #8 ; loop count 129 130 ; Subtract V block 131loop_v 132 ldr r6, [r2] ; src (A) 133 ldr r7, [r3], #4 ; pred (A) 134 135 uxtb16 r8, r6 ; [s2 | s0] (A) 136 uxtb16 r9, r7 ; [p2 | p0] (A) 137 uxtb16 r10, r6, ror #8 ; [s3 | s1] (A) 138 uxtb16 r11, r7, ror #8 ; [p3 | p1] (A) 139 140 usub16 r6, r8, r9 ; [d2 | d0] (A) 141 usub16 r7, r10, r11 ; [d3 | d1] (A) 142 143 ldr r10, [r2, #4] ; src (B) 144 ldr r11, [r3], #4 ; pred (B) 145 146 pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (A) 147 pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (A) 148 149 str r8, [r0], #4 ; diff (A) 150 uxtb16 r8, r10 ; [s2 | s0] (B) 151 str r9, [r0], #4 ; diff (A) 152 153 uxtb16 r9, r11 ; [p2 | p0] (B) 154 uxtb16 r10, r10, ror #8 ; [s3 | s1] (B) 155 uxtb16 r11, r11, ror #8 ; [p3 | p1] (B) 156 157 usub16 r6, r8, r9 ; [d2 | d0] (B) 158 usub16 r7, r10, r11 ; [d3 | d1] (B) 159 160 add r2, r2, r5 ; update vsrc pointer 161 162 pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (B) 163 pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (B) 164 165 str r8, [r0], #4 ; diff (B) 166 subs r4, r4, #1 ; update loop counter 167 str r9, [r0], #4 ; diff (B) 168 169 bne loop_v 170 171 ldmfd sp!, {r4-r12, pc} 172 173 ENDP 174 175 176; r0 short *diff 177; r1 unsigned char *src 178; r2 unsigned char *pred 179; r3 int stride 180|vp8_subtract_mby_armv6| PROC 181 182 stmfd sp!, {r4-r11} 183 184 mov r4, #16 185loop 186 ldr r6, [r1] ; src (A) 187 ldr r7, [r2], #4 ; pred (A) 188 189 uxtb16 r8, r6 ; [s2 | s0] (A) 190 uxtb16 r9, r7 ; [p2 | p0] (A) 191 uxtb16 r10, r6, ror #8 ; [s3 | s1] (A) 192 uxtb16 r11, r7, ror #8 ; [p3 | p1] (A) 193 194 usub16 r6, r8, r9 ; [d2 | d0] (A) 195 usub16 r7, r10, r11 ; [d3 | d1] (A) 196 197 ldr r10, [r1, #4] ; src (B) 198 ldr r11, [r2], #4 ; pred (B) 199 200 pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (A) 201 pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (A) 202 203 str r8, [r0], #4 ; diff (A) 204 uxtb16 r8, r10 ; [s2 | s0] (B) 205 str r9, [r0], #4 ; diff (A) 206 207 uxtb16 r9, r11 ; [p2 | p0] (B) 208 uxtb16 r10, r10, ror #8 ; [s3 | s1] (B) 209 uxtb16 r11, r11, ror #8 ; [p3 | p1] (B) 210 211 usub16 r6, r8, r9 ; [d2 | d0] (B) 212 usub16 r7, r10, r11 ; [d3 | d1] (B) 213 214 ldr r10, [r1, #8] ; src (C) 215 ldr r11, [r2], #4 ; pred (C) 216 217 pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (B) 218 pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (B) 219 220 str r8, [r0], #4 ; diff (B) 221 uxtb16 r8, r10 ; [s2 | s0] (C) 222 str r9, [r0], #4 ; diff (B) 223 224 uxtb16 r9, r11 ; [p2 | p0] (C) 225 uxtb16 r10, r10, ror #8 ; [s3 | s1] (C) 226 uxtb16 r11, r11, ror #8 ; [p3 | p1] (C) 227 228 usub16 r6, r8, r9 ; [d2 | d0] (C) 229 usub16 r7, r10, r11 ; [d3 | d1] (C) 230 231 ldr r10, [r1, #12] ; src (D) 232 ldr r11, [r2], #4 ; pred (D) 233 234 pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (C) 235 pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (C) 236 237 str r8, [r0], #4 ; diff (C) 238 uxtb16 r8, r10 ; [s2 | s0] (D) 239 str r9, [r0], #4 ; diff (C) 240 241 uxtb16 r9, r11 ; [p2 | p0] (D) 242 uxtb16 r10, r10, ror #8 ; [s3 | s1] (D) 243 uxtb16 r11, r11, ror #8 ; [p3 | p1] (D) 244 245 usub16 r6, r8, r9 ; [d2 | d0] (D) 246 usub16 r7, r10, r11 ; [d3 | d1] (D) 247 248 add r1, r1, r3 ; update src pointer 249 250 pkhbt r8, r6, r7, lsl #16 ; [d1 | d0] (D) 251 pkhtb r9, r7, r6, asr #16 ; [d3 | d2] (D) 252 253 str r8, [r0], #4 ; diff (D) 254 subs r4, r4, #1 ; update loop counter 255 str r9, [r0], #4 ; diff (D) 256 257 bne loop 258 259 ldmfd sp!, {r4-r11} 260 mov pc, lr 261 262 ENDP 263 264 END 265 266