lm32_functions.v

changeset 24
c336e674a37e
parent 23
252df75c8f67
child 25
7422134cbfea
     1.1 --- a/lm32_functions.v	Sun Mar 06 21:17:31 2011 +0000
     1.2 +++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.3 @@ -1,49 +0,0 @@
     1.4 -// =============================================================================
     1.5 -//                           COPYRIGHT NOTICE
     1.6 -// Copyright 2006 (c) Lattice Semiconductor Corporation
     1.7 -// ALL RIGHTS RESERVED
     1.8 -// This confidential and proprietary software may be used only as authorised by
     1.9 -// a licensing agreement from Lattice Semiconductor Corporation.
    1.10 -// The entire notice above must be reproduced on all authorized copies and
    1.11 -// copies may only be made to the extent permitted by a licensing agreement from
    1.12 -// Lattice Semiconductor Corporation.
    1.13 -//
    1.14 -// Lattice Semiconductor Corporation        TEL : 1-800-Lattice (USA and Canada)
    1.15 -// 5555 NE Moore Court                            408-826-6000 (other locations)
    1.16 -// Hillsboro, OR 97124                     web  : http://www.latticesemi.com/
    1.17 -// U.S.A                                   email: techsupport@latticesemi.com
    1.18 -// =============================================================================/
    1.19 -//                         FILE DETAILS
    1.20 -// Project      : LatticeMico32
    1.21 -// File         : lm32_functions.v
    1.22 -// Title        : Common functions
    1.23 -// Version      : 6.1.17
    1.24 -//              : Initial Release
    1.25 -// Version      : 7.0SP2, 3.0
    1.26 -//              : No Change
    1.27 -// Version      : 3.5
    1.28 -//              : Added function to generate log-of-two that rounds-up to
    1.29 -//              : power-of-two
    1.30 -// =============================================================================
    1.31 -					  
    1.32 -function integer clogb2;
    1.33 -input [31:0] value;
    1.34 -begin
    1.35 -   for (clogb2 = 0; value > 0; clogb2 = clogb2 + 1)
    1.36 -        value = value >> 1;
    1.37 -end
    1.38 -endfunction 
    1.39 -
    1.40 -function integer clogb2_v1;
    1.41 -input [31:0] value;
    1.42 -reg   [31:0] i;
    1.43 -reg   [31:0] temp;
    1.44 -begin
    1.45 -   temp = 0;
    1.46 -   i    = 0;
    1.47 -   for (i = 0; temp < value; i = i + 1)  
    1.48 -	temp = 1<<i;
    1.49 -   clogb2_v1 = i-1;
    1.50 -end
    1.51 -endfunction
    1.52 -