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

Subversion Repositories sparc64soc

[/] [sparc64soc/] [trunk/] [T1-CPU/] [exu/] [sparc_exu_aluadder64.v] - Blame information for rev 7

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 2 dmitryr
// ========== Copyright Header Begin ==========================================
2
// 
3
// OpenSPARC T1 Processor File: sparc_exu_aluadder64.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
//  Module Name: sparc_exu_aluadder64
24
//      Description:            This block implements the adder for the sparc alu.
25
//            It takes two operands and a carry bit.  It adds them together
26
//                                              and sends the output to adder_out.  It outputs the overflow
27
//                                              and carry condition codes for both 64 bit and 32 bit operations.
28
*/
29
 
30
module sparc_exu_aluadder64
31
  (
32
   rs1_data,
33
   rs2_data,
34
   cin,
35
   adder_out,
36
   cout32,
37
   cout64
38
   );
39
 
40
   input [63:0]  rs1_data;   // 1st input operand
41
   input [63:0]  rs2_data;   // 2nd input operand
42
   input         cin;           // carry in
43
 
44
   output [63:0] adder_out; // result of adder
45
   output         cout32;         // Cout from lower 32 bit add
46
   output         cout64;         // cout from 64 bit add
47
 
48
 
49
////////////////////////////////////////////
50
//  Module implementation
51
////////////////////////////////////////////
52
 
53
   assign      {cout32, adder_out[31:0]} = rs1_data[31:0]+rs2_data[31:0]+
54
                                           cin;
55
   assign      {cout64, adder_out[63:32]} = rs1_data[63:32]
56
               + rs2_data[63:32] + cout32;
57
 
58
endmodule // sparc_exu_aluadder64
59
 
60
 
61
 
62
 

powered by: WebSVN 2.1.0

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