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| 1 : | canard | 70 | # Copyright (C) 2002 Guillaume Morin <guillaume@morinfr.org>, Alcôve |
| 2 : | # | ||
| 3 : | edgomez | 851 | # 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 : | canard | 70 | # |
| 8 : | edgomez | 851 | # 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 : | edgomez | 1382 | # $Id: cbp_altivec.s,v 1.5 2004-03-22 22:36:23 edgomez Exp $ |
| 19 : | canard | 70 | # $Source: /home/xvid/cvs_copy/cvs-server-root/xvid/xvidcore/src/bitstream/ppc_asm/cbp_altivec.s,v $ |
| 20 : | edgomez | 1382 | # $Date: 2004-03-22 22:36:23 $ |
| 21 : | edgomez | 655 | # $Author: edgomez $ |
| 22 : | canard | 70 | # |
| 23 : | # This is my first PPC ASM attempt. So I might do nasty things. | ||
| 24 : | # Please send any comments to <guillaume@morinfr.org> | ||
| 25 : | |||
| 26 : | |||
| 27 : | # 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 : | #{ | ||
| 32 : | # uint32_t i, j; | ||
| 33 : | # uint32_t cbp = 0; | ||
| 34 : | # | ||
| 35 : | # for (i = 0; i < 6; i++) { | ||
| 36 : | # for (j = 1; j < 61; j+=4) { | ||
| 37 : | # if (codes[i][j] |codes[i][j+1]| | ||
| 38 : | # codes[i][j+2]|codes[i][j+3]) { | ||
| 39 : | # cbp |= 1 << (5 - i); | ||
| 40 : | # break; | ||
| 41 : | # } | ||
| 42 : | # } | ||
| 43 : | # | ||
| 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 : | #} | ||
| 52 : | |||
| 53 : | .data | ||
| 54 : | .skip: | ||
| 55 : | .quad 0x0000FFFFFFFFFFFF,-1 | ||
| 56 : | .align 4 | ||
| 57 : | |||
| 58 : | .text | ||
| 59 : | .global calc_cbp_altivec | ||
| 60 : | calc_cbp_altivec: | ||
| 61 : | canard | 75 | # Set VRSAVE |
| 62 : | li %r4,0xFFFFFFFF | ||
| 63 : | mtspr 256,%r4 | ||
| 64 : | |||
| 65 : | canard | 70 | # r9 will contain coeffs addr |
| 66 : | canard | 75 | mr %r9,%r3 |
| 67 : | canard | 70 | # r3 contains the result, therefore we set it to 0 |
| 68 : | canard | 75 | li %r3,0 |
| 69 : | canard | 70 | |
| 70 : | # CTR is the loop counter (rows) | ||
| 71 : | canard | 75 | li %r4,6 |
| 72 : | mtctr %r4 | ||
| 73 : | |||
| 74 : | # VR9 contains 0 | ||
| 75 : | vxor 9,9,9 | ||
| 76 : | |||
| 77 : | # VR10 will help us to remove the first 16 bits of each row | ||
| 78 : | lis %r4,.skip@ha | ||
| 79 : | addi %r4,4,.skip@l | ||
| 80 : | lvx 10,0,%r4 | ||
| 81 : | canard | 70 | .loop: |
| 82 : | canard | 75 | mr %r6,%r9 |
| 83 : | |||
| 84 : | lvxl 1,0,%r6 | ||
| 85 : | # Set the first 16 bits to 0 | ||
| 86 : | canard | 70 | vand 1,1,10 |
| 87 : | |||
| 88 : | canard | 75 | addi %r6,%r6,16 |
| 89 : | canard | 70 | lvxl 2,0,6 |
| 90 : | |||
| 91 : | canard | 75 | addi %r6,%r6,16 |
| 92 : | canard | 70 | lvxl 3,0,6 |
| 93 : | |||
| 94 : | canard | 75 | addi %r6,%r6,16 |
| 95 : | canard | 70 | lvxl 4,0,6 |
| 96 : | |||
| 97 : | canard | 75 | addi %r6,%r6,16 |
| 98 : | canard | 70 | lvxl 5,0,6 |
| 99 : | |||
| 100 : | canard | 75 | addi %r6,%r6,16 |
| 101 : | canard | 70 | lvxl 6,0,6 |
| 102 : | |||
| 103 : | canard | 75 | addi %r6,%r6,16 |
| 104 : | canard | 70 | lvxl 7,0,6 |
| 105 : | |||
| 106 : | canard | 75 | addi %r6,%r6,16 |
| 107 : | canard | 70 | lvxl 8,0,6 |
| 108 : | |||
| 109 : | vor 1,2,1 | ||
| 110 : | vor 1,3,1 | ||
| 111 : | vor 1,4,1 | ||
| 112 : | vor 1,5,1 | ||
| 113 : | vor 1,6,1 | ||
| 114 : | vor 1,7,1 | ||
| 115 : | vor 1,8,1 | ||
| 116 : | |||
| 117 : | canard | 75 | # is VR1 == 0 |
| 118 : | vcmpequw. 3,1,9 | ||
| 119 : | canard | 70 | bt 24,.newline |
| 120 : | .cbp: | ||
| 121 : | canard | 75 | # cbp calc |
| 122 : | mfctr %r5 | ||
| 123 : | subi %r5,%r5,1 | ||
| 124 : | li %r4,1 | ||
| 125 : | slw %r4,%r4,%r5 | ||
| 126 : | or %r3,%r3,%r4 | ||
| 127 : | canard | 70 | .newline: |
| 128 : | canard | 75 | addi %r9,%r9,128 |
| 129 : | canard | 70 | bdnz .loop |
| 130 : | blr |
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