/* * Copyright (c) 2012 Mans Rullgard <mans@mansr.com> * * This file is part of FFmpeg * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/arm/asm.S" function flac_lpc_16_1_arm ldr r12, [sp] push {r4, lr} ldr r1, [r1] subs r12, r12, #2 ldr lr, [r0], #4 beq 2f it lt poplt {r4, pc} 1: mul r4, lr, r1 ldm r0, {r2, lr} add_sh r2, r2, r4, asr r3 mul r4, r2, r1 subs r12, r12, #2 add_sh lr, lr, r4, asr r3 stm r0!, {r2, lr} bgt 1b it lt poplt {r4, pc} 2: mul r4, lr, r1 ldr r2, [r0] add_sh r2, r2, r4, asr r3 str r2, [r0] pop {r4, pc} endfunc function flac_lpc_16_2_arm ldr r12, [sp] subs r12, r12, r2 it le bxle lr push {r4-r9, lr} ldm r0!, {r6, r7} ldm r1, {r8, r9} subs r12, r12, #1 beq 2f 1: mul r4, r6, r8 mul r5, r7, r8 mla r4, r7, r9, r4 ldm r0, {r6, r7} add_sh r6, r6, r4, asr r3 mla r5, r6, r9, r5 add_sh r7, r7, r5, asr r3 stm r0!, {r6, r7} subs r12, r12, #2 bgt 1b it lt poplt {r4-r9, pc} 2: mul r4, r6, r8 mla r4, r7, r9, r4 ldr r5, [r0] add_sh r5, r5, r4, asr r3 str r5, [r0] pop {r4-r9, pc} endfunc function ff_flac_lpc_16_arm, export=1 cmp r2, #2 blt flac_lpc_16_1_arm beq flac_lpc_16_2_arm ldr r12, [sp] subs r12, r12, r2 it le bxle lr push {r4-r9, lr} subs r12, r12, #1 beq 3f 1: sub lr, r2, #2 mov r4, #0 mov r5, #0 ldr r7, [r0], #4 ldr r9, [r1], #4 2: mla r4, r7, r9, r4 ldm r0!, {r6, r7} mla r5, r6, r9, r5 ldm r1!, {r8, r9} mla r4, r6, r8, r4 subs lr, lr, #2 mla r5, r7, r8, r5 bgt 2b blt 6f mla r4, r7, r9, r4 ldr r7, [r0], #4 mla r5, r7, r9, r5 ldr r9, [r1], #4 6: mla r4, r7, r9, r4 ldm r0, {r6, r7} add_sh r6, r6, r4, asr r3 mla r5, r6, r9, r5 add_sh r7, r7, r5, asr r3 stm r0!, {r6, r7} sub r0, r0, r2, lsl #2 sub r1, r1, r2, lsl #2 subs r12, r12, #2 bgt 1b it lt poplt {r4-r9, pc} 3: mov r4, #0 4: ldr r5, [r1], #4 ldr r6, [r0], #4 mla r4, r5, r6, r4 subs r2, r2, #1 bgt 4b ldr r5, [r0] add_sh r5, r5, r4, asr r3 str r5, [r0] pop {r4-r9, pc} endfunc