OpenCores
URL https://opencores.org/ocsvn/sparc64soc/sparc64soc/trunk

Subversion Repositories sparc64soc

[/] [sparc64soc/] [trunk/] [T1-CPU/] [tlu/] [tlu_prencoder16.v] - Blame information for rev 2

Details | Compare with Previous | View Log

Line No. Rev Author Line
1 2 dmitryr
// ========== Copyright Header Begin ==========================================
2
// 
3
// OpenSPARC T1 Processor File: tlu_prencoder16.v
4
// Copyright (c) 2006 Sun Microsystems, Inc.  All Rights Reserved.
5
// DO NOT ALTER OR REMOVE COPYRIGHT NOTICES.
6
// 
7
// The above named program is free software; you can redistribute it and/or
8
// modify it under the terms of the GNU General Public
9
// License version 2 as published by the Free Software Foundation.
10
// 
11
// The above named program is distributed in the hope that it will be 
12
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
13
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14
// General Public License for more details.
15
// 
16
// You should have received a copy of the GNU General Public
17
// License along with this work; if not, write to the Free Software
18
// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
19
// 
20
// ========== Copyright Header End ============================================
21
////////////////////////////////////////////////////////////////////////
22
/*
23
//      Description:    Datapath Priority Encoder 16b
24
//                              - 15b multihot vector as input
25
//                              - 15b 1-hit vector as output
26
//                              - Can use some std length such as 16b
27
//                              - msb is given highest priority
28
*/
29
////////////////////////////////////////////////////////////////////////
30
// Global header file includes
31
////////////////////////////////////////////////////////////////////////
32
`include        "sys.h" // system level definition file which contains the
33
                        // time scale definition
34
 
35
////////////////////////////////////////////////////////////////////////
36
// Local header file includes / local defines
37
////////////////////////////////////////////////////////////////////////
38
 
39
module  tlu_prencoder16 (din, dout);
40
 
41
input   [14:0]   din  ;
42
output  [3:0]    dout ;
43
 
44
wire    [14:0]   onehot ;
45
 
46
assign  onehot[14] = din[14] ;
47
assign  onehot[13] = din[13] & ~din[14] ;
48
assign  onehot[12] = din[12] & ~(|din[14:13]) ;
49
assign  onehot[11] = din[11] & ~(|din[14:12]) ;
50
assign  onehot[10] = din[10] & ~(|din[14:11]) ;
51
assign  onehot[9]  = din[9]  & ~(|din[14:10]) ;
52
assign  onehot[8]  = din[8]  & ~(|din[14:9]) ;
53
assign  onehot[7]  = din[7]  & ~(|din[14:8]) ;
54
assign  onehot[6]  = din[6]  & ~(|din[14:7]) ;
55
assign  onehot[5]  = din[5]  & ~(|din[14:6]) ;
56
assign  onehot[4]  = din[4]  & ~(|din[14:5]) ;
57
assign  onehot[3]  = din[3]  & ~(|din[14:4]) ;
58
assign  onehot[2]  = din[2]  & ~(|din[14:3]) ;
59
assign  onehot[1]  = din[1]  & ~(|din[14:2]) ;
60
assign  onehot[0]  = din[0]  & ~(|din[14:1]) ;
61
//assign        onehot[0]  = din[0]  & ~(|din[15:1]) ;
62
 
63
assign  dout[3]  =  |onehot[14:7] ;
64
assign  dout[2]  = (|onehot[6:3]) | (|onehot[14:11]) ;
65
assign  dout[1]  = (|onehot[2:1]) | (|onehot[6:5]) |
66
                   (|onehot[10:9]) | (|onehot[14:13]) ;
67
assign  dout[0]  =  onehot[0] | onehot[2] | onehot[4] | onehot[6] |
68
                    onehot[8] | onehot[10] | onehot[12] | onehot[14] ;
69
 
70
endmodule

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.