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