flacdsp_arm.S (4647B)
1 /* 2 * Copyright (c) 2012 Mans Rullgard <mans@mansr.com> 3 * 4 * This file is part of FFmpeg 5 * 6 * FFmpeg 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 * FFmpeg 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 FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 #include "libavutil/arm/asm.S" 22 23 function flac_lpc_16_1_arm 24 ldr r12, [sp] 25 push {r4, lr} 26 ldr r1, [r1] 27 subs r12, r12, #2 28 ldr lr, [r0], #4 29 beq 2f 30 it lt 31 poplt {r4, pc} 32 1: 33 mul r4, lr, r1 34 ldm r0, {r2, lr} 35 add_sh r2, r2, r4, asr r3 36 mul r4, r2, r1 37 subs r12, r12, #2 38 add_sh lr, lr, r4, asr r3 39 stm r0!, {r2, lr} 40 bgt 1b 41 it lt 42 poplt {r4, pc} 43 2: 44 mul r4, lr, r1 45 ldr r2, [r0] 46 add_sh r2, r2, r4, asr r3 47 str r2, [r0] 48 pop {r4, pc} 49 endfunc 50 51 function flac_lpc_16_2_arm 52 ldr r12, [sp] 53 subs r12, r12, r2 54 it le 55 bxle lr 56 57 push {r4-r9, lr} 58 ldm r0!, {r6, r7} 59 ldm r1, {r8, r9} 60 subs r12, r12, #1 61 beq 2f 62 1: 63 mul r4, r6, r8 64 mul r5, r7, r8 65 mla r4, r7, r9, r4 66 ldm r0, {r6, r7} 67 add_sh r6, r6, r4, asr r3 68 mla r5, r6, r9, r5 69 add_sh r7, r7, r5, asr r3 70 stm r0!, {r6, r7} 71 subs r12, r12, #2 72 bgt 1b 73 it lt 74 poplt {r4-r9, pc} 75 2: 76 mul r4, r6, r8 77 mla r4, r7, r9, r4 78 ldr r5, [r0] 79 add_sh r5, r5, r4, asr r3 80 str r5, [r0] 81 pop {r4-r9, pc} 82 endfunc 83 84 function ff_flac_lpc_16_arm, export=1 85 cmp r2, #2 86 blt flac_lpc_16_1_arm 87 beq flac_lpc_16_2_arm 88 89 ldr r12, [sp] 90 subs r12, r12, r2 91 it le 92 bxle lr 93 94 push {r4-r9, lr} 95 96 subs r12, r12, #1 97 beq 3f 98 1: 99 sub lr, r2, #2 100 mov r4, #0 101 mov r5, #0 102 103 ldr r7, [r0], #4 104 ldr r9, [r1], #4 105 2: 106 mla r4, r7, r9, r4 107 ldm r0!, {r6, r7} 108 mla r5, r6, r9, r5 109 ldm r1!, {r8, r9} 110 mla r4, r6, r8, r4 111 subs lr, lr, #2 112 mla r5, r7, r8, r5 113 bgt 2b 114 blt 6f 115 116 mla r4, r7, r9, r4 117 ldr r7, [r0], #4 118 mla r5, r7, r9, r5 119 ldr r9, [r1], #4 120 6: 121 mla r4, r7, r9, r4 122 ldm r0, {r6, r7} 123 add_sh r6, r6, r4, asr r3 124 mla r5, r6, r9, r5 125 add_sh r7, r7, r5, asr r3 126 stm r0!, {r6, r7} 127 sub r0, r0, r2, lsl #2 128 sub r1, r1, r2, lsl #2 129 130 subs r12, r12, #2 131 bgt 1b 132 it lt 133 poplt {r4-r9, pc} 134 3: 135 mov r4, #0 136 4: 137 ldr r5, [r1], #4 138 ldr r6, [r0], #4 139 mla r4, r5, r6, r4 140 subs r2, r2, #1 141 bgt 4b 142 ldr r5, [r0] 143 add_sh r5, r5, r4, asr r3 144 str r5, [r0] 145 pop {r4-r9, pc} 146 endfunc