idctdsp_armv6.S (1828B)
1 /* 2 * Copyright (c) 2009 Mans Rullgard <mans@mansr.com> 3 * 4 * This file is part of FFmpeg. 5 * 6 * FFmpeg is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU Lesser General Public 8 * License as published by the Free Software Foundation; either 9 * version 2.1 of the License, or (at your option) any later version. 10 * 11 * FFmpeg is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * Lesser General Public License for more details. 15 * 16 * You should have received a copy of the GNU Lesser General Public 17 * License along with FFmpeg; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 #include "libavutil/arm/asm.S" 22 23 function ff_add_pixels_clamped_armv6, export=1 24 push {r4-r8,lr} 25 mov r3, #8 26 1: 27 ldm r0!, {r4,r5,r12,lr} 28 ldrd r6, r7, [r1] 29 pkhbt r8, r4, r5, lsl #16 30 pkhtb r5, r5, r4, asr #16 31 pkhbt r4, r12, lr, lsl #16 32 pkhtb lr, lr, r12, asr #16 33 pld [r1, r2] 34 uxtab16 r8, r8, r6 35 uxtab16 r5, r5, r6, ror #8 36 uxtab16 r4, r4, r7 37 uxtab16 lr, lr, r7, ror #8 38 usat16 r8, #8, r8 39 usat16 r5, #8, r5 40 usat16 r4, #8, r4 41 usat16 lr, #8, lr 42 orr r6, r8, r5, lsl #8 43 orr r7, r4, lr, lsl #8 44 subs r3, r3, #1 45 strd_post r6, r7, r1, r2 46 bgt 1b 47 pop {r4-r8,pc} 48 endfunc