cgen.cpp revision 12855:588919e0e4aa
1/***************************************************************************** 2 3 Licensed to Accellera Systems Initiative Inc. (Accellera) under one or 4 more contributor license agreements. See the NOTICE file distributed 5 with this work for additional information regarding copyright ownership. 6 Accellera licenses this file to you under the Apache License, Version 2.0 7 (the "License"); you may not use this file except in compliance with the 8 License. You may obtain a copy of the License at 9 10 http://www.apache.org/licenses/LICENSE-2.0 11 12 Unless required by applicable law or agreed to in writing, software 13 distributed under the License is distributed on an "AS IS" BASIS, 14 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 15 implied. See the License for the specific language governing 16 permissions and limitations under the License. 17 18 *****************************************************************************/ 19 20/***************************************************************************** 21 22 cgen.cpp -- 23 24 Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15 25 26 *****************************************************************************/ 27 28/***************************************************************************** 29 30 MODIFICATION LOG - modifiers, enter your name, affiliation, date and 31 changes you are making here. 32 33 Name, Affiliation, Date: 34 Description of Modification: 35 36 *****************************************************************************/ 37 38#include "systemc.h" 39 40/* Filename seqgen.h */ 41/* This is the interface file for asynchronous process 'seqgen' */ 42 43SC_MODULE( seqgen ) 44{ 45 SC_HAS_PROCESS( seqgen ); 46 47 sc_in<bool> clock_i; 48 sc_out<int> data_o; 49 50 // Constructor 51 seqgen( sc_module_name NAME, 52 sc_signal<bool>& CLOCK_I, 53 sc_signal<int>& DATA_O ) 54 { 55 clock_i(CLOCK_I); 56 data_o(DATA_O); 57 SC_THREAD( entry ); 58 sensitive << clock_i; 59 } 60 61 // Functionality of process 62 void entry(); 63}; 64 65 66/* Filename seqgen.cc */ 67/* This is the implementation file for asynchronous process 'seqgen' */ 68 69void seqgen::entry() 70{ 71 // Initialization code can go here 72 int i = 17; 73 wait(); 74 75 while (true) { // Infinite loop encompassing functionality 76 if (clock_i.posedge()) { 77 // Generate output only on positive edge of clock 78 data_o.write(i); 79 i = ((i * i) % 1019) - 9; 80 } 81 wait(); 82 } 83} 84 85 86// Interface and implementation files for 87// Asynchronous block for code generation 88 89SC_MODULE( codegen ) 90{ 91 SC_HAS_PROCESS( codegen ); 92 93 sc_in<int> data_i; 94 sc_out<int> code_o; 95 96 int sum, num; 97 98 // Constructor 99 codegen( sc_module_name NAME, 100 sc_signal<int>& DATA_I, 101 sc_signal<int>& CODE_O ) 102 { 103 data_i(DATA_I); 104 code_o(CODE_O); 105 SC_METHOD( entry ); 106 sensitive << data_i; 107 108 sum = 0; 109 num = 0; 110 } 111 112 // Process functionality 113 void entry(); 114}; 115 116void codegen::entry() 117{ 118 // Simple code generation routine 119 sum += data_i.read(); 120 num++; 121 code_o.write(sum % num); 122} 123 124void testbench(const sc_signal<int>& data, 125 const sc_signal<int>& code, 126 sc_signal<bool>& clock) 127{ 128 int i; 129 130 sc_start(0, SC_NS); 131 for (i=0; i<100; i++) { 132 sc_start( 10, SC_NS ); 133 clock.write(1); 134 sc_start( 10, SC_NS ); 135 clock.write(0); 136 char buf[BUFSIZ]; 137 sprintf( buf, "Data = %4d\tCode = %4d", data.read(), code.read() ); 138 cout << buf << endl; 139 } 140} 141 142int 143sc_main(int ac, char *av[]) 144{ 145 sc_signal<bool> clock("Clock"); 146 sc_signal<int> data("Data"); 147 sc_signal<int> code("Code"); 148 149 clock = 0; 150 data = 0; 151 code = 0; 152 153 seqgen S("S", clock, data); 154 codegen C("C", data, code); 155 156 testbench(data, code, clock); 157 return 0; 158} 159