Sat, 06 Aug 2011 01:26:56 +0100
remove synthesis delay entities to ease merge
| philpem@26 | 1 | // ================================================================== |
| philpem@26 | 2 | // >>>>>>>>>>>>>>>>>>>>>>> COPYRIGHT NOTICE <<<<<<<<<<<<<<<<<<<<<<<<< |
| philpem@26 | 3 | // ------------------------------------------------------------------ |
| philpem@26 | 4 | // Copyright (c) 2006-2011 by Lattice Semiconductor Corporation |
| philpem@26 | 5 | // ALL RIGHTS RESERVED |
| philpem@26 | 6 | // ------------------------------------------------------------------ |
| philpem@26 | 7 | // |
| philpem@26 | 8 | // IMPORTANT: THIS FILE IS AUTO-GENERATED BY THE LATTICEMICO SYSTEM. |
| philpem@26 | 9 | // |
| philpem@26 | 10 | // Permission: |
| philpem@26 | 11 | // |
| philpem@26 | 12 | // Lattice Semiconductor grants permission to use this code |
| philpem@26 | 13 | // pursuant to the terms of the Lattice Semiconductor Corporation |
| philpem@26 | 14 | // Open Source License Agreement. |
| philpem@26 | 15 | // |
| philpem@26 | 16 | // Disclaimer: |
| philpem@0 | 17 | // |
| philpem@26 | 18 | // Lattice Semiconductor provides no warranty regarding the use or |
| philpem@26 | 19 | // functionality of this code. It is the user's responsibility to |
| philpem@26 | 20 | // verify the user’s design for consistency and functionality through |
| philpem@26 | 21 | // the use of formal verification methods. |
| philpem@26 | 22 | // |
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| philpem@26 | 25 | // Lattice Semiconductor Corporation |
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| philpem@26 | 36 | // -------------------------------------------------------------------- |
| philpem@0 | 37 | // FILE DETAILS |
| philpem@0 | 38 | // Project : LatticeMico32 |
| philpem@0 | 39 | // File : lm32_functions.v |
| philpem@0 | 40 | // Title : Common functions |
| philpem@0 | 41 | // Version : 6.1.17 |
| philpem@0 | 42 | // : Initial Release |
| philpem@0 | 43 | // Version : 7.0SP2, 3.0 |
| philpem@0 | 44 | // : No Change |
| philpem@0 | 45 | // Version : 3.5 |
| philpem@0 | 46 | // : Added function to generate log-of-two that rounds-up to |
| philpem@0 | 47 | // : power-of-two |
| philpem@0 | 48 | // ============================================================================= |
| philpem@0 | 49 | |
| philpem@0 | 50 | function integer clogb2; |
| philpem@0 | 51 | input [31:0] value; |
| philpem@0 | 52 | begin |
| philpem@0 | 53 | for (clogb2 = 0; value > 0; clogb2 = clogb2 + 1) |
| philpem@0 | 54 | value = value >> 1; |
| philpem@0 | 55 | end |
| philpem@0 | 56 | endfunction |
| philpem@0 | 57 | |
| philpem@0 | 58 | function integer clogb2_v1; |
| philpem@0 | 59 | input [31:0] value; |
| philpem@0 | 60 | reg [31:0] i; |
| philpem@0 | 61 | reg [31:0] temp; |
| philpem@0 | 62 | begin |
| philpem@0 | 63 | temp = 0; |
| philpem@0 | 64 | i = 0; |
| philpem@0 | 65 | for (i = 0; temp < value; i = i + 1) |
| philpem@0 | 66 | temp = 1<<i; |
| philpem@0 | 67 | clogb2_v1 = i-1; |
| philpem@0 | 68 | end |
| philpem@0 | 69 | endfunction |
| philpem@0 | 70 |