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| 1 : | canard | 49 | # Copyright (C) 2002 Guillaume Morin, Alcôve |
| 2 : | # | ||
| 3 : | # This program is free software; you can redistribute it and/or modify | ||
| 4 : | # it under the terms of the GNU General Public License as published by | ||
| 5 : | # the Free Software Foundation; either version 2 of the License, or | ||
| 6 : | # (at your option) any later version. | ||
| 7 : | # | ||
| 8 : | # This program is distributed in the hope that it will be useful, | ||
| 9 : | # but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 10 : | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 11 : | # GNU General Public License for more details. | ||
| 12 : | # | ||
| 13 : | # You should have received a copy of the GNU General Public License | ||
| 14 : | # along with this program; if not, write to the Free Software | ||
| 15 : | # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
| 16 : | # | ||
| 17 : | # | ||
| 18 : | # $Id: cbp_ppc.s,v 1.1 2002-03-21 23:42:53 canard Exp $ | ||
| 19 : | # $Source: /home/xvid/cvs_copy/cvs-server-root/xvid/xvidcore/src/bitstream/ppc_asm/cbp_ppc.s,v $ | ||
| 20 : | # $Date: 2002-03-21 23:42:53 $ | ||
| 21 : | # $Author: canard $ | ||
| 22 : | |||
| 23 : | #uint32_t calc_cbp_c(const int16_t codes[6][64]) | ||
| 24 : | #{ | ||
| 25 : | # uint32_t i, j; | ||
| 26 : | # uint32_t cbp = 0; | ||
| 27 : | # | ||
| 28 : | # for (i = 0; i < 6; i++) { | ||
| 29 : | # for (j = 1; j < 64/4; j+=4) { | ||
| 30 : | # if (codes[i][j] |codes[i][j+1]| | ||
| 31 : | # codes[i][j+2]|codes[i][j+3]) { | ||
| 32 : | # cbp |= 1 << (5 - i); | ||
| 33 : | # break; | ||
| 34 : | # } | ||
| 35 : | # } | ||
| 36 : | # } | ||
| 37 : | # return cbp; | ||
| 38 : | #} | ||
| 39 : | |||
| 40 : | .text | ||
| 41 : | .global calc_cbp_ppc | ||
| 42 : | calc_cbp_ppc: | ||
| 43 : | mr 9,3 | ||
| 44 : | li 8,5 | ||
| 45 : | xor 3,3,3 | ||
| 46 : | .loop: | ||
| 47 : | li 7,14 | ||
| 48 : | mr 6,9 | ||
| 49 : | .loop2: | ||
| 50 : | lha 4,2(6) | ||
| 51 : | lha 5,4(6) | ||
| 52 : | or 4,5,4 | ||
| 53 : | lha 5,6(6) | ||
| 54 : | or 4,5,4 | ||
| 55 : | lha 5,8(6) | ||
| 56 : | or 4,5,4 | ||
| 57 : | cmpwi 4,0 | ||
| 58 : | bne .cbp | ||
| 59 : | addi 6,6,8 | ||
| 60 : | subi 7,7,1 | ||
| 61 : | cmpwi 7,-1 | ||
| 62 : | beq .lastcoeffs | ||
| 63 : | b .loop2 | ||
| 64 : | .lastcoeffs: | ||
| 65 : | lha 4,2(6) | ||
| 66 : | lha 5,4(6) | ||
| 67 : | or 4,5,4 | ||
| 68 : | lha 5,6(6) | ||
| 69 : | or 4,5,4 | ||
| 70 : | cmpwi 4,0 | ||
| 71 : | beq .newline | ||
| 72 : | .cbp: | ||
| 73 : | li 4,1 | ||
| 74 : | slw 4,4,8 | ||
| 75 : | or 3,3,4 | ||
| 76 : | b .newline | ||
| 77 : | .newline: | ||
| 78 : | addi 9,9,128 | ||
| 79 : | subi 8,8,1 | ||
| 80 : | cmpwi 8,-1 | ||
| 81 : | bne .loop | ||
| 82 : | .end: | ||
| 83 : | blr |
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