Hardware Design: SIE
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| 1 | // ============================================================================= |
| 2 | // COPYRIGHT NOTICE |
| 3 | // Copyright 2006 (c) Lattice Semiconductor Corporation |
| 4 | // ALL RIGHTS RESERVED |
| 5 | // This confidential and proprietary software may be used only as authorised by |
| 6 | // a licensing agreement from Lattice Semiconductor Corporation. |
| 7 | // The entire notice above must be reproduced on all authorized copies and |
| 8 | // copies may only be made to the extent permitted by a licensing agreement from |
| 9 | // Lattice Semiconductor Corporation. |
| 10 | // |
| 11 | // Lattice Semiconductor Corporation TEL : 1-800-Lattice (USA and Canada) |
| 12 | // 5555 NE Moore Court 408-826-6000 (other locations) |
| 13 | // Hillsboro, OR 97124 web : http://www.latticesemi.com/ |
| 14 | // U.S.A email: techsupport@latticesemi.com |
| 15 | // =============================================================================/ |
| 16 | // FILE DETAILS |
| 17 | // Project : LatticeMico32 |
| 18 | // File : lm32_addsub.v |
| 19 | // Title : PMI adder/subtractor. |
| 20 | // Version : 6.1.17 |
| 21 | // ============================================================================= |
| 22 | |
| 23 | `include "lm32_include.v" |
| 24 | |
| 25 | ///////////////////////////////////////////////////// |
| 26 | // Module interface |
| 27 | ///////////////////////////////////////////////////// |
| 28 | |
| 29 | module lm32_addsub ( |
| 30 | // ----- Inputs ------- |
| 31 | DataA, |
| 32 | DataB, |
| 33 | Cin, |
| 34 | Add_Sub, |
| 35 | // ----- Outputs ------- |
| 36 | Result, |
| 37 | Cout |
| 38 | ); |
| 39 | |
| 40 | ///////////////////////////////////////////////////// |
| 41 | // Inputs |
| 42 | ///////////////////////////////////////////////////// |
| 43 | |
| 44 | input [31:0] DataA; |
| 45 | input [31:0] DataB; |
| 46 | input Cin; |
| 47 | input Add_Sub; |
| 48 | |
| 49 | ///////////////////////////////////////////////////// |
| 50 | // Outputs |
| 51 | ///////////////////////////////////////////////////// |
| 52 | |
| 53 | output [31:0] Result; |
| 54 | wire [31:0] Result; |
| 55 | output Cout; |
| 56 | wire Cout; |
| 57 | |
| 58 | ///////////////////////////////////////////////////// |
| 59 | // Instantiations |
| 60 | ///////////////////////////////////////////////////// |
| 61 | |
| 62 | wire [32:0] tmp_addResult = DataA + DataB + Cin; |
| 63 | wire [32:0] tmp_subResult = DataA - DataB - !Cin; |
| 64 | |
| 65 | assign Result = (Add_Sub == 1) ? tmp_addResult[31:0] : tmp_subResult[31:0]; |
| 66 | assign Cout = (Add_Sub == 1) ? tmp_addResult[32] : !tmp_subResult[32]; |
| 67 | |
| 68 | |
| 69 | endmodule |
| 70 |
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