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1 : | Isibaar | 3 | ;/************************************************************************** |
2 : | ; * | ||
3 : | ; * XVID MPEG-4 VIDEO CODEC | ||
4 : | ; * mmx cbp calc | ||
5 : | ; * | ||
6 : | ; * This program is an implementation of a part of one or more MPEG-4 | ||
7 : | ; * Video tools as specified in ISO/IEC 14496-2 standard. Those intending | ||
8 : | ; * to use this software module in hardware or software products are | ||
9 : | ; * advised that its use may infringe existing patents or copyrights, and | ||
10 : | ; * any such use would be at such party's own risk. The original | ||
11 : | ; * developer of this software module and his/her company, and subsequent | ||
12 : | ; * editors and their companies, will have no liability for use of this | ||
13 : | ; * software or modifications or derivatives thereof. | ||
14 : | ; * | ||
15 : | ; * This program is free software; you can redistribute it and/or modify | ||
16 : | ; * it under the terms of the GNU General Public License as published by | ||
17 : | ; * the Free Software Foundation; either version 2 of the License, or | ||
18 : | ; * (at your option) any later version. | ||
19 : | ; * | ||
20 : | ; * This program is distributed in the hope that it will be useful, | ||
21 : | ; * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
22 : | ; * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
23 : | ; * GNU General Public License for more details. | ||
24 : | ; * | ||
25 : | ; * You should have received a copy of the GNU General Public License | ||
26 : | ; * along with this program; if not, write to the Free Software | ||
27 : | ; * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
28 : | ; * | ||
29 : | ; *************************************************************************/ | ||
30 : | |||
31 : | ;/************************************************************************** | ||
32 : | ; * | ||
33 : | ; * History: | ||
34 : | ; * | ||
35 : | ; * 24.11.2001 inital version; (c)2001 peter ross <pross@cs.rmit.edu.au> | ||
36 : | ; * | ||
37 : | ; *************************************************************************/ | ||
38 : | |||
39 : | |||
40 : | bits 32 | ||
41 : | |||
42 : | section .data | ||
43 : | |||
44 : | %macro cglobal 1 | ||
45 : | %ifdef PREFIX | ||
46 : | global _%1 | ||
47 : | %define %1 _%1 | ||
48 : | %else | ||
49 : | global %1 | ||
50 : | %endif | ||
51 : | %endmacro | ||
52 : | |||
53 : | ignore_dc dw 0, -1, -1, -1 | ||
54 : | |||
55 : | |||
56 : | section .text | ||
57 : | |||
58 : | |||
59 : | ;=========================================================================== | ||
60 : | ; | ||
61 : | ; uint32_t calc_cbp_mmx(const int16_t coeff[6][64]); | ||
62 : | ; | ||
63 : | ;=========================================================================== | ||
64 : | |||
65 : | align 16 | ||
66 : | cglobal calc_cbp_mmx | ||
67 : | calc_cbp_mmx | ||
68 : | push ebx | ||
69 : | push ecx | ||
70 : | push edx | ||
71 : | push esi | ||
72 : | |||
73 : | mov esi, [esp + 16 + 4] ; coeff | ||
74 : | movq mm7, [ignore_dc] | ||
75 : | |||
76 : | xor eax, eax ; cbp = 0 | ||
77 : | mov edx, 6 | ||
78 : | .loop | ||
79 : | movq mm0, [esi] | ||
80 : | pand mm0, mm7 | ||
81 : | movq mm1, [esi+8] | ||
82 : | |||
83 : | por mm0, [esi+16] | ||
84 : | por mm1, [esi+24] | ||
85 : | |||
86 : | por mm0, [esi+32] | ||
87 : | por mm1, [esi+40] | ||
88 : | |||
89 : | por mm0, [esi+48] | ||
90 : | por mm1, [esi+56] | ||
91 : | |||
92 : | por mm0, [esi+64] | ||
93 : | por mm1, [esi+72] | ||
94 : | |||
95 : | por mm0, [esi+80] | ||
96 : | por mm1, [esi+88] | ||
97 : | |||
98 : | por mm0, [esi+96] | ||
99 : | por mm1, [esi+104] | ||
100 : | |||
101 : | por mm0, [esi+112] | ||
102 : | por mm1, [esi+120] | ||
103 : | |||
104 : | por mm0, mm1 | ||
105 : | movq mm1, mm0 | ||
106 : | psrlq mm1, 32 | ||
107 : | por mm0, mm1 | ||
108 : | movd ebx, mm0 | ||
109 : | |||
110 : | add esi, 128 | ||
111 : | |||
112 : | or ebx, ebx | ||
113 : | jz .iterate | ||
114 : | |||
115 : | ; cbp |= 1 << (edx-1) | ||
116 : | |||
117 : | mov ecx, edx | ||
118 : | dec ecx | ||
119 : | mov ebx, 1 | ||
120 : | shl ebx, cl | ||
121 : | or eax, ebx | ||
122 : | |||
123 : | .iterate dec edx | ||
124 : | jnz .loop | ||
125 : | |||
126 : | pop esi | ||
127 : | pop edx | ||
128 : | pop ecx | ||
129 : | pop ebx | ||
130 : | |||
131 : | ret |
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