1/** 2 * Copyright (C) 2010 Mans Rullgard 3 * 4 * This file is part of Libav. 5 * 6 * Libav is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * Libav is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with Libav; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21#include "asm.S" 22 23.macro rac_get_prob h, bs, buf, cw, pr, t0, t1 24 adds \bs, \bs, \t0 25 lsl \cw, \cw, \t0 26 lsl \t0, \h, \t0 27 rsb \h, \pr, #256 28 it cs 29 ldrhcs \t1, [\buf], #2 30 smlabb \h, \t0, \pr, \h 31T itttt cs 32 rev16cs \t1, \t1 33A orrcs \cw, \cw, \t1, lsl \bs 34T lslcs \t1, \t1, \bs 35T orrcs \cw, \cw, \t1 36 subcs \bs, \bs, #16 37 lsr \h, \h, #8 38 cmp \cw, \h, lsl #16 39 itt ge 40 subge \cw, \cw, \h, lsl #16 41 subge \h, \t0, \h 42.endm 43 44.macro rac_get_128 h, bs, buf, cw, t0, t1 45 adds \bs, \bs, \t0 46 lsl \cw, \cw, \t0 47 lsl \t0, \h, \t0 48 it cs 49 ldrhcs \t1, [\buf], #2 50 mov \h, #128 51 it cs 52 rev16cs \t1, \t1 53 add \h, \h, \t0, lsl #7 54A orrcs \cw, \cw, \t1, lsl \bs 55T ittt cs 56T lslcs \t1, \t1, \bs 57T orrcs \cw, \cw, \t1 58 subcs \bs, \bs, #16 59 lsr \h, \h, #8 60 cmp \cw, \h, lsl #16 61 itt ge 62 subge \cw, \cw, \h, lsl #16 63 subge \h, \t0, \h 64.endm 65 66function ff_decode_block_coeffs_armv6, export=1 67 push {r0,r1,r4-r11,lr} 68 movrel lr, X(ff_vp56_norm_shift) 69 ldrd r4, r5, [sp, #44] @ token_prob, qmul 70 cmp r3, #0 71 ldr r11, [r5] 72 ldm r0, {r5-r7} @ high, bits, buf 73 it ne 74 pkhtbne r11, r11, r11, asr #16 75 ldr r8, [r0, #16] @ code_word 760: 77 ldrb r9, [lr, r5] 78 add r3, r3, #1 79 ldrb r0, [r4, #1] 80 rac_get_prob r5, r6, r7, r8, r0, r9, r10 81 blt 2f 82 83 ldrb r9, [lr, r5] 84 ldrb r0, [r4, #2] 85 rac_get_prob r5, r6, r7, r8, r0, r9, r10 86 ldrb r9, [lr, r5] 87 bge 3f 88 89 add r4, r3, r3, lsl #5 90 sxth r12, r11 91 add r4, r2, r4 92 adds r6, r6, r9 93 add r4, r4, #11 94 lsl r8, r8, r9 95 it cs 96 ldrhcs r10, [r7], #2 97 lsl r9, r5, r9 98 mov r5, #128 99 it cs 100 rev16cs r10, r10 101 add r5, r5, r9, lsl #7 102T ittt cs 103T lslcs r10, r10, r6 104T orrcs r8, r8, r10 105A orrcs r8, r8, r10, lsl r6 106 subcs r6, r6, #16 107 lsr r5, r5, #8 108 cmp r8, r5, lsl #16 109 movrel r10, zigzag_scan-1 110 itt ge 111 subge r8, r8, r5, lsl #16 112 subge r5, r9, r5 113 ldrb r10, [r10, r3] 114 it ge 115 rsbge r12, r12, #0 116 cmp r3, #16 117 strh r12, [r1, r10] 118 bge 6f 1195: 120 ldrb r9, [lr, r5] 121 ldrb r0, [r4] 122 rac_get_prob r5, r6, r7, r8, r0, r9, r10 123 pkhtb r11, r11, r11, asr #16 124 bge 0b 125 1266: 127 ldr r0, [sp] 128 ldr r9, [r0, #12] 129 cmp r7, r9 130 it hi 131 movhi r7, r9 132 stm r0, {r5-r7} @ high, bits, buf 133 str r8, [r0, #16] @ code_word 134 135 add sp, sp, #8 136 mov r0, r3 137 pop {r4-r11,pc} 1382: 139 add r4, r3, r3, lsl #5 140 cmp r3, #16 141 add r4, r2, r4 142 pkhtb r11, r11, r11, asr #16 143 bne 0b 144 b 6b 1453: 146 ldrb r0, [r4, #3] 147 rac_get_prob r5, r6, r7, r8, r0, r9, r10 148 ldrb r9, [lr, r5] 149 bge 1f 150 151 mov r12, #2 152 ldrb r0, [r4, #4] 153 rac_get_prob r5, r6, r7, r8, r0, r9, r10 154 it ge 155 addge r12, #1 156 ldrb r9, [lr, r5] 157 blt 4f 158 ldrb r0, [r4, #5] 159 rac_get_prob r5, r6, r7, r8, r0, r9, r10 160 it ge 161 addge r12, #1 162 ldrb r9, [lr, r5] 163 b 4f 1641: 165 ldrb r0, [r4, #6] 166 rac_get_prob r5, r6, r7, r8, r0, r9, r10 167 ldrb r9, [lr, r5] 168 bge 3f 169 170 ldrb r0, [r4, #7] 171 rac_get_prob r5, r6, r7, r8, r0, r9, r10 172 ldrb r9, [lr, r5] 173 bge 2f 174 175 mov r12, #5 176 mov r0, #159 177 rac_get_prob r5, r6, r7, r8, r0, r9, r10 178 it ge 179 addge r12, r12, #1 180 ldrb r9, [lr, r5] 181 b 4f 1822: 183 mov r12, #7 184 mov r0, #165 185 rac_get_prob r5, r6, r7, r8, r0, r9, r10 186 it ge 187 addge r12, r12, #2 188 ldrb r9, [lr, r5] 189 mov r0, #145 190 rac_get_prob r5, r6, r7, r8, r0, r9, r10 191 it ge 192 addge r12, r12, #1 193 ldrb r9, [lr, r5] 194 b 4f 1953: 196 ldrb r0, [r4, #8] 197 rac_get_prob r5, r6, r7, r8, r0, r9, r10 198 it ge 199 addge r4, r4, #1 200 ldrb r9, [lr, r5] 201 ite ge 202 movge r12, #2 203 movlt r12, #0 204 ldrb r0, [r4, #9] 205 rac_get_prob r5, r6, r7, r8, r0, r9, r10 206 mov r9, #8 207 it ge 208 addge r12, r12, #1 209 movrel r4, X(ff_vp8_dct_cat_prob) 210 lsl r9, r9, r12 211 ldr r4, [r4, r12, lsl #2] 212 add r12, r9, #3 213 mov r1, #0 214 ldrb r0, [r4], #1 2151: 216 ldrb r9, [lr, r5] 217 lsl r1, r1, #1 218 rac_get_prob r5, r6, r7, r8, r0, r9, r10 219 ldrb r0, [r4], #1 220 it ge 221 addge r1, r1, #1 222 cmp r0, #0 223 bne 1b 224 ldrb r9, [lr, r5] 225 add r12, r12, r1 226 ldr r1, [sp, #4] 2274: 228 add r4, r3, r3, lsl #5 229 add r4, r2, r4 230 add r4, r4, #22 231 rac_get_128 r5, r6, r7, r8, r9, r10 232 it ge 233 rsbge r12, r12, #0 234 smulbb r12, r12, r11 235 movrel r9, zigzag_scan-1 236 ldrb r9, [r9, r3] 237 cmp r3, #16 238 strh r12, [r1, r9] 239 bge 6b 240 b 5b 241endfunc 242 243const zigzag_scan 244 .byte 0, 2, 8, 16 245 .byte 10, 4, 6, 12 246 .byte 18, 24, 26, 20 247 .byte 14, 22, 28, 30 248endconst 249