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| 1 : | canard | 54 | # Copyright (C) 2002 Guillaume Morin <guillaume@morinfr.org>, Alcôve |
| 2 : | canard | 49 | # |
| 3 : | edgomez | 655 | # * This file is part of XviD, a free MPEG-4 video encoder/decoder |
| 4 : | # * | ||
| 5 : | # * XviD is free software; you can redistribute it and/or modify it | ||
| 6 : | # * under the terms of the GNU General Public License as published by | ||
| 7 : | # * the Free Software Foundation; either version 2 of the License, or | ||
| 8 : | # * (at your option) any later version. | ||
| 9 : | # * | ||
| 10 : | # * This program is distributed in the hope that it will be useful, | ||
| 11 : | # * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 12 : | # * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 13 : | # * GNU General Public License for more details. | ||
| 14 : | # * | ||
| 15 : | # * You should have received a copy of the GNU General Public License | ||
| 16 : | # * along with this program; if not, write to the Free Software | ||
| 17 : | # * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| 18 : | # * | ||
| 19 : | # * Under section 8 of the GNU General Public License, the copyright | ||
| 20 : | # * holders of XVID explicitly forbid distribution in the following | ||
| 21 : | # * countries: | ||
| 22 : | # * | ||
| 23 : | # * - Japan | ||
| 24 : | # * - United States of America | ||
| 25 : | # * | ||
| 26 : | # * Linking XviD statically or dynamically with other modules is making a | ||
| 27 : | # * combined work based on XviD. Thus, the terms and conditions of the | ||
| 28 : | # * GNU General Public License cover the whole combination. | ||
| 29 : | # * | ||
| 30 : | # * As a special exception, the copyright holders of XviD give you | ||
| 31 : | # * permission to link XviD with independent modules that communicate with | ||
| 32 : | # * XviD solely through the VFW1.1 and DShow interfaces, regardless of the | ||
| 33 : | # * license terms of these independent modules, and to copy and distribute | ||
| 34 : | # * the resulting combined work under terms of your choice, provided that | ||
| 35 : | # * every copy of the combined work is accompanied by a complete copy of | ||
| 36 : | # * the source code of XviD (the version of XviD used to produce the | ||
| 37 : | # * combined work), being distributed under the terms of the GNU General | ||
| 38 : | # * Public License plus this exception. An independent module is a module | ||
| 39 : | # * which is not derived from or based on XviD. | ||
| 40 : | # * | ||
| 41 : | # * Note that people who make modified versions of XviD are not obligated | ||
| 42 : | # * to grant this special exception for their modified versions; it is | ||
| 43 : | # * their choice whether to do so. The GNU General Public License gives | ||
| 44 : | # * permission to release a modified version without this exception; this | ||
| 45 : | # * exception also makes it possible to release a modified version which | ||
| 46 : | # * carries forward this exception. | ||
| 47 : | # * | ||
| 48 : | canard | 49 | # |
| 49 : | edgomez | 655 | # $Id: cbp_ppc.s,v 1.10 2002-11-17 00:57:57 edgomez Exp $ |
| 50 : | canard | 49 | # $Source: /home/xvid/cvs_copy/cvs-server-root/xvid/xvidcore/src/bitstream/ppc_asm/cbp_ppc.s,v $ |
| 51 : | edgomez | 655 | # $Date: 2002-11-17 00:57:57 $ |
| 52 : | # $Author: edgomez $ | ||
| 53 : | canard | 54 | # |
| 54 : | canard | 57 | # This is my first PPC ASM attempt. So I might do nasty things. |
| 55 : | # Please send any comments to <guillaume@morinfr.org> | ||
| 56 : | canard | 49 | |
| 57 : | canard | 54 | |
| 58 : | # Returns a field of bits that indicates non zero ac blocks | ||
| 59 : | # for this macro block | ||
| 60 : | # | ||
| 61 : | # uint32_t calc_cbp_c(const int16_t codes[6][64]) | ||
| 62 : | canard | 49 | #{ |
| 63 : | canard | 54 | # uint32_t i, j; |
| 64 : | # uint32_t cbp = 0; | ||
| 65 : | canard | 49 | # |
| 66 : | canard | 54 | # for (i = 0; i < 6; i++) { |
| 67 : | # for (j = 1; j < 61; j+=4) { | ||
| 68 : | canard | 49 | # if (codes[i][j] |codes[i][j+1]| |
| 69 : | canard | 54 | # codes[i][j+2]|codes[i][j+3]) { |
| 70 : | canard | 49 | # cbp |= 1 << (5 - i); |
| 71 : | # break; | ||
| 72 : | # } | ||
| 73 : | # } | ||
| 74 : | canard | 54 | # |
| 75 : | # if(codes[i][j]|codes[i][j+1]|codes[i][j+2]) | ||
| 76 : | # cbp |= 1 << (5 - i); | ||
| 77 : | # | ||
| 78 : | # } | ||
| 79 : | # | ||
| 80 : | # return cbp; | ||
| 81 : | # | ||
| 82 : | canard | 49 | #} |
| 83 : | |||
| 84 : | canard | 72 | .data |
| 85 : | .skip: | ||
| 86 : | .word 0,-1 | ||
| 87 : | .align 4 | ||
| 88 : | |||
| 89 : | canard | 49 | .text |
| 90 : | .global calc_cbp_ppc | ||
| 91 : | calc_cbp_ppc: | ||
| 92 : | canard | 54 | # r9 will contain coeffs addr |
| 93 : | canard | 75 | mr %r9,%r3 |
| 94 : | canard | 56 | # r8 is the loop counter (rows) |
| 95 : | canard | 75 | li %r8,5 |
| 96 : | canard | 54 | # r3 contains the result, therefore we set it to 0 |
| 97 : | canard | 75 | li %r3,0 |
| 98 : | canard | 49 | .loop: |
| 99 : | canard | 57 | # CTR is the loop2 counter |
| 100 : | canard | 75 | li %r4,16 |
| 101 : | mtctr %r4 | ||
| 102 : | canard | 54 | # r6 is coeff pointer for this line |
| 103 : | canard | 75 | mr %r6,%r9 |
| 104 : | lis %r7,.skip@ha | ||
| 105 : | addi %r7,%r7,.skip@l | ||
| 106 : | lwz %r7,0(%r7) | ||
| 107 : | canard | 49 | .loop2: |
| 108 : | canard | 54 | # coeffs is a matrix of 16 bits cells |
| 109 : | canard | 75 | lwz %r4,0(%r6) |
| 110 : | and %r4,%r4,%r7 | ||
| 111 : | li %r7,-1 | ||
| 112 : | canard | 72 | |
| 113 : | canard | 75 | lwz %r5,4(%r6) |
| 114 : | canard | 54 | # or. updates CR0 |
| 115 : | canard | 75 | or. %r4,%r5,%r4 |
| 116 : | canard | 54 | # testing bit 2 (is zero) of CR0 |
| 117 : | canard | 55 | bf 2,.cbp |
| 118 : | canard | 75 | addi %r6,%r6,8 |
| 119 : | canard | 57 | bdnz .loop2 |
| 120 : | canard | 72 | b .newline |
| 121 : | canard | 49 | .cbp: |
| 122 : | canard | 75 | li %r4,1 |
| 123 : | slw %r4,%r4,%r8 | ||
| 124 : | or %r3,%r3,%r4 | ||
| 125 : | canard | 49 | .newline: |
| 126 : | canard | 75 | addi %r9,%r9,128 |
| 127 : | canard | 54 | # updates CR0, blabla |
| 128 : | canard | 75 | subic. %r8,%r8,1 |
| 129 : | canard | 55 | bf 0,.loop |
| 130 : | canard | 49 | blr |
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