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revision 70, Tue Mar 26 23:21:02 2002 UTC revision 655, Sun Nov 17 00:57:58 2002 UTC
# Line 1  Line 1 
1  #    Copyright (C) 2002 Guillaume Morin <guillaume@morinfr.org>, Alcôve  #    Copyright (C) 2002 Guillaume Morin <guillaume@morinfr.org>, Alcôve
2  #  #
3  #    This program is free software; you can redistribute it and/or modify  # *  This file is part of XviD, a free MPEG-4 video encoder/decoder
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  # *  XviD is free software; you can redistribute it and/or modify it
6  #    (at your option) any later version.  # *  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  #    This program is distributed in the hope that it will be useful,  # *  (at your option) any later version.
9  #    but WITHOUT ANY WARRANTY; without even the implied warranty of  # *
10  #    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  # *  This program is distributed in the hope that it will be useful,
11  #    GNU General Public License for more details.  # *  but WITHOUT ANY WARRANTY; without even the implied warranty of
12  #  # *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  #    You should have received a copy of the GNU General Public License  # *  GNU General Public License for more details.
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  # *  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  #  #
49  #  #    $Id: cbp_altivec.s,v 1.3 2002-11-17 00:57:57 edgomez Exp $
 #    $Id: cbp_altivec.s,v 1.1 2002-03-26 23:21:02 canard Exp $  
50  #    $Source: /home/xvid/cvs_copy/cvs-server-root/xvid/xvidcore/src/bitstream/ppc_asm/cbp_altivec.s,v $  #    $Source: /home/xvid/cvs_copy/cvs-server-root/xvid/xvidcore/src/bitstream/ppc_asm/cbp_altivec.s,v $
51  #    $Date: 2002-03-26 23:21:02 $  #    $Date: 2002-11-17 00:57:57 $
52  #    $Author: canard $  #    $Author: edgomez $
53  #  #
54  #    This is my first PPC ASM attempt. So I might do nasty things.  #    This is my first PPC ASM attempt. So I might do nasty things.
55  #    Please send any comments to <guillaume@morinfr.org>  #    Please send any comments to <guillaume@morinfr.org>
# Line 58  Line 89 
89  .text  .text
90  .global calc_cbp_altivec  .global calc_cbp_altivec
91  calc_cbp_altivec:  calc_cbp_altivec:
92            # Set VRSAVE
93            li %r4,0xFFFFFFFF
94            mtspr 256,%r4
95    
96          # r9 will contain coeffs addr          # r9 will contain coeffs addr
97          mr 9,3          mr %r9,%r3
98          # r3 contains the result, therefore we set it to 0          # r3 contains the result, therefore we set it to 0
99          xor 3,3,3          li %r3,0
100    
101          # CTR is the loop counter (rows)          # CTR is the loop counter (rows)
102          li 4,6          li %r4,6
103          mtctr 4          mtctr %r4
104          vxor 12,12,12  
105          lis 4,.skip@ha          # VR9 contains 0
106          addi 4,4,.skip@l          vxor 9,9,9
107          lvx 10,0,4  
108            # VR10 will help us to remove the first 16 bits of each row
109            lis %r4,.skip@ha
110            addi %r4,4,.skip@l
111            lvx 10,0,%r4
112  .loop:  .loop:
113          mr 6,9          mr %r6,%r9
114          # coeffs is a matrix of 16 bits cells  
115          lvxl 1,0,6          lvxl 1,0,%r6
116            # Set the first 16 bits to 0
117          vand 1,1,10          vand 1,1,10
118    
119          addi 6,6,16          addi %r6,%r6,16
120          lvxl 2,0,6          lvxl 2,0,6
121    
122          addi 6,6,16          addi %r6,%r6,16
123          lvxl 3,0,6          lvxl 3,0,6
124    
125          addi 6,6,16          addi %r6,%r6,16
126          lvxl 4,0,6          lvxl 4,0,6
127    
128          addi 6,6,16          addi %r6,%r6,16
129          lvxl 5,0,6          lvxl 5,0,6
130    
131          addi 6,6,16          addi %r6,%r6,16
132          lvxl 6,0,6          lvxl 6,0,6
133    
134          addi 6,6,16          addi %r6,%r6,16
135          lvxl 7,0,6          lvxl 7,0,6
136    
137          addi 6,6,16          addi %r6,%r6,16
138          lvxl 8,0,6          lvxl 8,0,6
139    
140          vor 1,2,1          vor 1,2,1
# Line 105  Line 145 
145          vor 1,7,1          vor 1,7,1
146          vor 1,8,1          vor 1,8,1
147    
148          vcmpequw. 3,1,12          # is VR1 == 0
149            vcmpequw. 3,1,9
150          bt 24,.newline          bt 24,.newline
151  .cbp:  .cbp:
152          mfctr 5          # cbp calc
153          subi 5,5,1          mfctr %r5
154          li 4,1          subi %r5,%r5,1
155          slw 4,4,5          li %r4,1
156          or 3,3,4          slw %r4,%r4,%r5
157            or %r3,%r3,%r4
158  .newline:  .newline:
159          addi 9,9,128          addi %r9,%r9,128
160          bdnz .loop          bdnz .loop
161          blr          blr
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