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| 1 : | canard | 1.2 | # Copyright (C) 2002 Guillaume Morin <guillaume@morinfr.org>, Alcôve |
| 2 : | canard | 1.1 | # |
| 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: lib.c,v 1.33 2002/03/18 11:14:23 gmorin Exp $ | ||
| 19 : | # $Source: /cvsroot/nss-mysql/nss-mysql/lib.c,v $ | ||
| 20 : | # $Date: 2002/03/18 11:14:23 $ | ||
| 21 : | # $Author: gmorin $ | ||
| 22 : | canard | 1.2 | # |
| 23 : | canard | 1.5 | # This is my first PPC ASM attempt. So I might do nasty things. |
| 24 : | # Please send any comments to <guillaume@morinfr.org> | ||
| 25 : | canard | 1.2 | |
| 26 : | canard | 1.1 | |
| 27 : | canard | 1.2 | # Returns a field of bits that indicates non zero ac blocks |
| 28 : | # for this macro block | ||
| 29 : | # | ||
| 30 : | # uint32_t calc_cbp_c(const int16_t codes[6][64]) | ||
| 31 : | canard | 1.1 | #{ |
| 32 : | canard | 1.2 | # uint32_t i, j; |
| 33 : | # uint32_t cbp = 0; | ||
| 34 : | canard | 1.1 | # |
| 35 : | canard | 1.2 | # for (i = 0; i < 6; i++) { |
| 36 : | # for (j = 1; j < 61; j+=4) { | ||
| 37 : | canard | 1.1 | # if (codes[i][j] |codes[i][j+1]| |
| 38 : | canard | 1.2 | # codes[i][j+2]|codes[i][j+3]) { |
| 39 : | canard | 1.1 | # cbp |= 1 << (5 - i); |
| 40 : | # break; | ||
| 41 : | # } | ||
| 42 : | # } | ||
| 43 : | canard | 1.2 | # |
| 44 : | # if(codes[i][j]|codes[i][j+1]|codes[i][j+2]) | ||
| 45 : | # cbp |= 1 << (5 - i); | ||
| 46 : | # | ||
| 47 : | # } | ||
| 48 : | # | ||
| 49 : | # return cbp; | ||
| 50 : | # | ||
| 51 : | canard | 1.1 | #} |
| 52 : | |||
| 53 : | canard | 1.8 | .data |
| 54 : | .skip: | ||
| 55 : | .word 0,-1 | ||
| 56 : | .align 4 | ||
| 57 : | |||
| 58 : | canard | 1.1 | .text |
| 59 : | .global calc_cbp_ppc | ||
| 60 : | calc_cbp_ppc: | ||
| 61 : | canard | 1.2 | # r9 will contain coeffs addr |
| 62 : | canard | 1.1 | mr 9,3 |
| 63 : | canard | 1.4 | # r8 is the loop counter (rows) |
| 64 : | canard | 1.1 | li 8,5 |
| 65 : | canard | 1.2 | # r3 contains the result, therefore we set it to 0 |
| 66 : | canard | 1.8 | li 3,0 |
| 67 : | canard | 1.1 | .loop: |
| 68 : | canard | 1.5 | # CTR is the loop2 counter |
| 69 : | canard | 1.8 | li 4,16 |
| 70 : | canard | 1.6 | mtctr 4 |
| 71 : | canard | 1.2 | # r6 is coeff pointer for this line |
| 72 : | canard | 1.1 | mr 6,9 |
| 73 : | canard | 1.8 | lis 7,.skip@ha |
| 74 : | addi 7,7,.skip@l | ||
| 75 : | lwz 7,0(7) | ||
| 76 : | canard | 1.1 | .loop2: |
| 77 : | canard | 1.2 | # coeffs is a matrix of 16 bits cells |
| 78 : | canard | 1.8 | lwz 4,0(6) |
| 79 : | and 4,4,7 | ||
| 80 : | li 7,-1 | ||
| 81 : | |||
| 82 : | lwz 5,4(6) | ||
| 83 : | canard | 1.2 | # or. updates CR0 |
| 84 : | or. 4,5,4 | ||
| 85 : | # testing bit 2 (is zero) of CR0 | ||
| 86 : | canard | 1.3 | bf 2,.cbp |
| 87 : | canard | 1.1 | addi 6,6,8 |
| 88 : | canard | 1.5 | bdnz .loop2 |
| 89 : | canard | 1.8 | b .newline |
| 90 : | canard | 1.1 | .cbp: |
| 91 : | li 4,1 | ||
| 92 : | slw 4,4,8 | ||
| 93 : | or 3,3,4 | ||
| 94 : | .newline: | ||
| 95 : | addi 9,9,128 | ||
| 96 : | canard | 1.2 | # updates CR0, blabla |
| 97 : | subic. 8,8,1 | ||
| 98 : | canard | 1.3 | bf 0,.loop |
| 99 : | canard | 1.1 | blr |
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