Sun, 06 Mar 2011 19:22:27 +0000
Make interrupts active high
Original-Author: lekernel
Original-Source: milkymist 5e8c03b53aaa820f3b43
| philpem@0 | 1 | // ============================================================================= |
| philpem@0 | 2 | // COPYRIGHT NOTICE |
| philpem@0 | 3 | // Copyright 2006 (c) Lattice Semiconductor Corporation |
| philpem@0 | 4 | // ALL RIGHTS RESERVED |
| philpem@0 | 5 | // This confidential and proprietary software may be used only as authorised by |
| philpem@0 | 6 | // a licensing agreement from Lattice Semiconductor Corporation. |
| philpem@0 | 7 | // The entire notice above must be reproduced on all authorized copies and |
| philpem@0 | 8 | // copies may only be made to the extent permitted by a licensing agreement from |
| philpem@0 | 9 | // Lattice Semiconductor Corporation. |
| philpem@0 | 10 | // |
| philpem@0 | 11 | // Lattice Semiconductor Corporation TEL : 1-800-Lattice (USA and Canada) |
| philpem@0 | 12 | // 5555 NE Moore Court 408-826-6000 (other locations) |
| philpem@0 | 13 | // Hillsboro, OR 97124 web : http://www.latticesemi.com/ |
| philpem@0 | 14 | // U.S.A email: techsupport@latticesemi.com |
| philpem@0 | 15 | // =============================================================================/ |
| philpem@0 | 16 | // FILE DETAILS |
| philpem@0 | 17 | // Project : LatticeMico32 |
| philpem@0 | 18 | // File : lm32_addsub.v |
| philpem@0 | 19 | // Title : PMI adder/subtractor. |
| philpem@0 | 20 | // Version : 6.1.17 |
| philpem@0 | 21 | // : Initial Release |
| philpem@0 | 22 | // Version : 7.0SP2, 3.0 |
| philpem@0 | 23 | // : No Change |
| philpem@0 | 24 | // Version : 3.1 |
| philpem@0 | 25 | // : No Change |
| philpem@0 | 26 | // ============================================================================= |
| philpem@0 | 27 | |
| philpem@0 | 28 | `include "lm32_include.v" |
| philpem@0 | 29 | |
| philpem@0 | 30 | ///////////////////////////////////////////////////// |
| philpem@0 | 31 | // Module interface |
| philpem@0 | 32 | ///////////////////////////////////////////////////// |
| philpem@0 | 33 | |
| philpem@0 | 34 | module lm32_addsub ( |
| philpem@0 | 35 | // ----- Inputs ------- |
| philpem@0 | 36 | DataA, |
| philpem@0 | 37 | DataB, |
| philpem@0 | 38 | Cin, |
| philpem@0 | 39 | Add_Sub, |
| philpem@0 | 40 | // ----- Outputs ------- |
| philpem@0 | 41 | Result, |
| philpem@0 | 42 | Cout |
| philpem@0 | 43 | ); |
| philpem@0 | 44 | |
| philpem@0 | 45 | ///////////////////////////////////////////////////// |
| philpem@0 | 46 | // Inputs |
| philpem@0 | 47 | ///////////////////////////////////////////////////// |
| philpem@0 | 48 | |
| philpem@0 | 49 | input [31:0] DataA; |
| philpem@0 | 50 | input [31:0] DataB; |
| philpem@0 | 51 | input Cin; |
| philpem@0 | 52 | input Add_Sub; |
| philpem@0 | 53 | |
| philpem@0 | 54 | ///////////////////////////////////////////////////// |
| philpem@0 | 55 | // Outputs |
| philpem@0 | 56 | ///////////////////////////////////////////////////// |
| philpem@0 | 57 | |
| philpem@0 | 58 | output [31:0] Result; |
| philpem@0 | 59 | wire [31:0] Result; |
| philpem@0 | 60 | output Cout; |
| philpem@0 | 61 | wire Cout; |
| philpem@0 | 62 | |
| philpem@0 | 63 | ///////////////////////////////////////////////////// |
| philpem@0 | 64 | // Instantiations |
| philpem@0 | 65 | ///////////////////////////////////////////////////// |
| philpem@0 | 66 | |
| philpem@2 | 67 | // Only use Lattice specific constructs when compiling with ispLEVER |
| philpem@2 | 68 | `ifdef PLATFORM_LATTICE |
| philpem@0 | 69 | generate |
| philpem@0 | 70 | if (`LATTICE_FAMILY == "SC" || `LATTICE_FAMILY == "SCM") begin |
| philpem@2 | 71 | `endif |
| philpem@0 | 72 | wire [32:0] tmp_addResult = DataA + DataB + Cin; |
| philpem@0 | 73 | wire [32:0] tmp_subResult = DataA - DataB - !Cin; |
| philpem@0 | 74 | |
| philpem@0 | 75 | assign Result = (Add_Sub == 1) ? tmp_addResult[31:0] : tmp_subResult[31:0]; |
| philpem@0 | 76 | assign Cout = (Add_Sub == 1) ? tmp_addResult[32] : !tmp_subResult[32]; |
| philpem@2 | 77 | `ifdef PLATFORM_LATTICE |
| philpem@0 | 78 | end else begin |
| philpem@0 | 79 | pmi_addsub #(// ----- Parameters ------- |
| philpem@0 | 80 | .pmi_data_width (32), |
| philpem@0 | 81 | .pmi_result_width (32), |
| philpem@0 | 82 | .pmi_sign ("off"), |
| philpem@0 | 83 | .pmi_family (`LATTICE_FAMILY), |
| philpem@0 | 84 | .module_type ("pmi_addsub")) |
| philpem@0 | 85 | addsub (// ----- Inputs ------- |
| philpem@0 | 86 | .DataA (DataA), |
| philpem@0 | 87 | .DataB (DataB), |
| philpem@0 | 88 | .Cin (Cin), |
| philpem@0 | 89 | .Add_Sub (Add_Sub), |
| philpem@0 | 90 | // ----- Outputs ------- |
| philpem@0 | 91 | .Result (Result), |
| philpem@0 | 92 | .Cout (Cout), |
| philpem@0 | 93 | .Overflow ()); |
| philpem@0 | 94 | end |
| philpem@0 | 95 | endgenerate |
| philpem@2 | 96 | `endif |
| philpem@0 | 97 | |
| philpem@0 | 98 | endmodule |