| /* |
| * 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 |