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
23function ff_get_pixels_armv6, export=1
24        pld             [r1, r2]
25        push            {r4-r8, lr}
26        mov             lr,  #8
271:
28        ldrd_post       r4,  r5,  r1,  r2
29        subs            lr,  lr,  #1
30        uxtb16          r6,  r4
31        uxtb16          r4,  r4,  ror #8
32        uxtb16          r12, r5
33        uxtb16          r8,  r5,  ror #8
34        pld             [r1, r2]
35        pkhbt           r5,  r6,  r4,  lsl #16
36        pkhtb           r6,  r4,  r6,  asr #16
37        pkhbt           r7,  r12, r8,  lsl #16
38        pkhtb           r12, r8,  r12, asr #16
39        stm             r0!, {r5,r6,r7,r12}
40        bgt             1b
41
42        pop             {r4-r8, pc}
43endfunc
44
45function ff_diff_pixels_armv6, export=1
46        pld             [r1, r3]
47        pld             [r2, r3]
48        push            {r4-r9, lr}
49        mov             lr,  #8
501:
51        ldrd_post       r4,  r5,  r1,  r3
52        ldrd_post       r6,  r7,  r2,  r3
53        uxtb16          r8,  r4
54        uxtb16          r4,  r4,  ror #8
55        uxtb16          r9,  r6
56        uxtb16          r6,  r6,  ror #8
57        pld             [r1, r3]
58        ssub16          r9,  r8,  r9
59        ssub16          r6,  r4,  r6
60        uxtb16          r8,  r5
61        uxtb16          r5,  r5,  ror #8
62        pld             [r2, r3]
63        pkhbt           r4,  r9,  r6,  lsl #16
64        pkhtb           r6,  r6,  r9,  asr #16
65        uxtb16          r9,  r7
66        uxtb16          r7,  r7,  ror #8
67        ssub16          r9,  r8,  r9
68        ssub16          r5,  r5,  r7
69        subs            lr,  lr,  #1
70        pkhbt           r8,  r9,  r5,  lsl #16
71        pkhtb           r9,  r5,  r9,  asr #16
72        stm             r0!, {r4,r6,r8,r9}
73        bgt             1b
74
75        pop             {r4-r9, pc}
76endfunc
77