diff options
Diffstat (limited to 'libavcodec/arm/idctdsp_armv6.S')
| -rw-r--r-- | libavcodec/arm/idctdsp_armv6.S | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/libavcodec/arm/idctdsp_armv6.S b/libavcodec/arm/idctdsp_armv6.S new file mode 100644 index 0000000000..a6e77d6da1 --- /dev/null +++ b/libavcodec/arm/idctdsp_armv6.S @@ -0,0 +1,48 @@ +/* + * 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_add_pixels_clamped_armv6, export=1 + push {r4-r8,lr} + mov r3, #8 +1: + ldm r0!, {r4,r5,r12,lr} + ldrd r6, r7, [r1] + pkhbt r8, r4, r5, lsl #16 + pkhtb r5, r5, r4, asr #16 + pkhbt r4, r12, lr, lsl #16 + pkhtb lr, lr, r12, asr #16 + pld [r1, r2] + uxtab16 r8, r8, r6 + uxtab16 r5, r5, r6, ror #8 + uxtab16 r4, r4, r7 + uxtab16 lr, lr, r7, ror #8 + usat16 r8, #8, r8 + usat16 r5, #8, r5 + usat16 r4, #8, r4 + usat16 lr, #8, lr + orr r6, r8, r5, lsl #8 + orr r7, r4, lr, lsl #8 + subs r3, r3, #1 + strd_post r6, r7, r1, r2 + bgt 1b + pop {r4-r8,pc} +endfunc |