1/*
2 * MMI optimized DSP utils
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 *
5 * MMI optimization by Leon van Stuivenberg
6 * clear_blocks_mmi() by BroadQ
7 *
8 * This file is part of FFmpeg.
9 *
10 * FFmpeg is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Lesser General Public
12 * License as published by the Free Software Foundation; either
13 * version 2.1 of the License, or (at your option) any later version.
14 *
15 * FFmpeg is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
18 * Lesser General Public License for more details.
19 *
20 * You should have received a copy of the GNU Lesser General Public
21 * License along with FFmpeg; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 */
24
25#include "libavcodec/dsputil.h"
26#include "mmi.h"
27
28void ff_mmi_idct_put(uint8_t *dest, int line_size, DCTELEM *block);
29void ff_mmi_idct_add(uint8_t *dest, int line_size, DCTELEM *block);
30void ff_mmi_idct(DCTELEM *block);
31
32static void clear_blocks_mmi(DCTELEM * blocks)
33{
34        __asm__ volatile(
35        ".set noreorder    \n"
36        "addiu $9, %0, 768 \n"
37        "nop               \n"
38        "1:                \n"
39        "sq $0, 0(%0)      \n"
40        "move $8, %0       \n"
41        "addi %0, %0, 64   \n"
42        "sq $0, 16($8)     \n"
43        "slt $10, %0, $9   \n"
44        "sq $0, 32($8)     \n"
45        "bnez $10, 1b      \n"
46        "sq $0, 48($8)     \n"
47        ".set reorder      \n"
48        : "+r" (blocks) ::  "$8", "$9", "memory" );
49}
50
51
52static void get_pixels_mmi(DCTELEM *block, const uint8_t *pixels, int line_size)
53{
54        __asm__ volatile(
55        ".set   push            \n\t"
56        ".set   mips3           \n\t"
57        "ld     $8, 0(%0)       \n\t"
58        "add    %0, %0, %2      \n\t"
59        "ld     $9, 0(%0)       \n\t"
60        "add    %0, %0, %2      \n\t"
61        "ld     $10, 0(%0)      \n\t"
62        "pextlb $8, $0, $8      \n\t"
63        "sq     $8, 0(%1)       \n\t"
64        "add    %0, %0, %2      \n\t"
65        "ld     $8, 0(%0)       \n\t"
66        "pextlb $9, $0, $9      \n\t"
67        "sq     $9, 16(%1)      \n\t"
68        "add    %0, %0, %2      \n\t"
69        "ld     $9, 0(%0)       \n\t"
70        "pextlb $10, $0, $10    \n\t"
71        "sq     $10, 32(%1)     \n\t"
72        "add    %0, %0, %2      \n\t"
73        "ld     $10, 0(%0)      \n\t"
74        "pextlb $8, $0, $8      \n\t"
75        "sq     $8, 48(%1)      \n\t"
76        "add    %0, %0, %2      \n\t"
77        "ld     $8, 0(%0)       \n\t"
78        "pextlb $9, $0, $9      \n\t"
79        "sq     $9, 64(%1)      \n\t"
80        "add    %0, %0, %2      \n\t"
81        "ld     $9, 0(%0)       \n\t"
82        "pextlb $10, $0, $10    \n\t"
83        "sq     $10, 80(%1)     \n\t"
84        "pextlb $8, $0, $8      \n\t"
85        "sq     $8, 96(%1)      \n\t"
86        "pextlb $9, $0, $9      \n\t"
87        "sq     $9, 112(%1)     \n\t"
88        ".set   pop             \n\t"
89        : "+r" (pixels) : "r" (block), "r" (line_size) : "$8", "$9", "$10", "memory" );
90}
91
92
93static void put_pixels8_mmi(uint8_t *block, const uint8_t *pixels, int line_size, int h)
94{
95        __asm__ volatile(
96        ".set   push            \n\t"
97        ".set   mips3           \n\t"
98        "1:                     \n\t"
99        "ldr    $8, 0(%1)       \n\t"
100        "addiu  %2, %2, -1      \n\t"
101        "ldl    $8, 7(%1)       \n\t"
102        "add    %1, %1, %3      \n\t"
103        "sd     $8, 0(%0)       \n\t"
104        "add    %0, %0, %3      \n\t"
105        "bgtz   %2, 1b          \n\t"
106        ".set   pop             \n\t"
107        : "+r" (block), "+r" (pixels), "+r" (h) : "r" (line_size)
108        : "$8", "memory" );
109}
110
111
112static void put_pixels16_mmi(uint8_t *block, const uint8_t *pixels, int line_size, int h)
113{
114        __asm__ volatile (
115        ".set   push            \n\t"
116        ".set   mips3           \n\t"
117        "1:                     \n\t"
118        "ldr    $8, 0(%1)       \n\t"
119        "add    $11, %1, %3     \n\t"
120        "ldl    $8, 7(%1)       \n\t"
121        "add    $10, %0, %3     \n\t"
122        "ldr    $9, 8(%1)       \n\t"
123        "ldl    $9, 15(%1)      \n\t"
124        "ldr    $12, 0($11)     \n\t"
125        "add    %1, $11, %3     \n\t"
126        "ldl    $12, 7($11)     \n\t"
127        "pcpyld $8, $9, $8      \n\t"
128        "sq     $8, 0(%0)       \n\t"
129        "ldr    $13, 8($11)     \n\t"
130        "addiu  %2, %2, -2      \n\t"
131        "ldl    $13, 15($11)    \n\t"
132        "add    %0, $10, %3     \n\t"
133        "pcpyld $12, $13, $12   \n\t"
134        "sq     $12, 0($10)     \n\t"
135        "bgtz   %2, 1b          \n\t"
136        ".set   pop             \n\t"
137        : "+r" (block), "+r" (pixels), "+r" (h) : "r" (line_size)
138        : "$8", "$9", "$10", "$11", "$12", "$13", "memory" );
139}
140
141
142void dsputil_init_mmi(DSPContext* c, AVCodecContext *avctx)
143{
144    const int idct_algo= avctx->idct_algo;
145
146    c->clear_blocks = clear_blocks_mmi;
147
148    c->put_pixels_tab[1][0] = put_pixels8_mmi;
149    c->put_no_rnd_pixels_tab[1][0] = put_pixels8_mmi;
150
151    c->put_pixels_tab[0][0] = put_pixels16_mmi;
152    c->put_no_rnd_pixels_tab[0][0] = put_pixels16_mmi;
153
154    c->get_pixels = get_pixels_mmi;
155
156    if(idct_algo==FF_IDCT_AUTO || idct_algo==FF_IDCT_PS2){
157        c->idct_put= ff_mmi_idct_put;
158        c->idct_add= ff_mmi_idct_add;
159        c->idct    = ff_mmi_idct;
160        c->idct_permutation_type= FF_LIBMPEG2_IDCT_PERM;
161    }
162}
163
164