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| /* | |
| * Copyright (c) 2012 Mans Rullgard <[email protected]> | |
| * | |
| * 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, =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 | |