| /* |
| * Copyright (c) 2009 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 ff_pix_norm1_armv6, export=1 |
| push {r4-r6, lr} |
| mov r12, #16 |
| mov lr, #0 |
| 1: |
| ldm r0, {r2-r5} |
| uxtb16 r6, r2 |
| uxtb16 r2, r2, ror #8 |
| smlad lr, r6, r6, lr |
| uxtb16 r6, r3 |
| smlad lr, r2, r2, lr |
| uxtb16 r3, r3, ror #8 |
| smlad lr, r6, r6, lr |
| uxtb16 r6, r4 |
| smlad lr, r3, r3, lr |
| uxtb16 r4, r4, ror #8 |
| smlad lr, r6, r6, lr |
| uxtb16 r6, r5 |
| smlad lr, r4, r4, lr |
| uxtb16 r5, r5, ror #8 |
| smlad lr, r6, r6, lr |
| subs r12, r12, #1 |
| add r0, r0, r1 |
| smlad lr, r5, r5, lr |
| bgt 1b |
| |
| mov r0, lr |
| pop {r4-r6, pc} |
| endfunc |
| |
| function ff_pix_sum_armv6, export=1 |
| push {r4-r7, lr} |
| mov r12, #16 |
| mov r2, #0 |
| mov r3, #0 |
| mov lr, #0 |
| ldr r4, [r0] |
| 1: |
| subs r12, r12, #1 |
| ldr r5, [r0, #4] |
| usada8 r2, r4, lr, r2 |
| ldr r6, [r0, #8] |
| usada8 r3, r5, lr, r3 |
| ldr r7, [r0, #12] |
| usada8 r2, r6, lr, r2 |
| beq 2f |
| ldr_pre r4, r0, r1 |
| usada8 r3, r7, lr, r3 |
| bgt 1b |
| 2: |
| usada8 r3, r7, lr, r3 |
| add r0, r2, r3 |
| pop {r4-r7, pc} |
| endfunc |