| /* | |
| * Copyright (c) 2009 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 ff_pix_norm1_armv6, =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, =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 | |