112855Sgabeblack@google.com/***************************************************************************** 212855Sgabeblack@google.com 312855Sgabeblack@google.com Licensed to Accellera Systems Initiative Inc. (Accellera) under one or 412855Sgabeblack@google.com more contributor license agreements. See the NOTICE file distributed 512855Sgabeblack@google.com with this work for additional information regarding copyright ownership. 612855Sgabeblack@google.com Accellera licenses this file to you under the Apache License, Version 2.0 712855Sgabeblack@google.com (the "License"); you may not use this file except in compliance with the 812855Sgabeblack@google.com License. You may obtain a copy of the License at 912855Sgabeblack@google.com 1012855Sgabeblack@google.com http://www.apache.org/licenses/LICENSE-2.0 1112855Sgabeblack@google.com 1212855Sgabeblack@google.com Unless required by applicable law or agreed to in writing, software 1312855Sgabeblack@google.com distributed under the License is distributed on an "AS IS" BASIS, 1412855Sgabeblack@google.com WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or 1512855Sgabeblack@google.com implied. See the License for the specific language governing 1612855Sgabeblack@google.com permissions and limitations under the License. 1712855Sgabeblack@google.com 1812855Sgabeblack@google.com *****************************************************************************/ 1912855Sgabeblack@google.com 2012855Sgabeblack@google.com/***************************************************************************** 2112855Sgabeblack@google.com 2212855Sgabeblack@google.com circ48.h -- 2312855Sgabeblack@google.com 2412855Sgabeblack@google.com Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15 2512855Sgabeblack@google.com 2612855Sgabeblack@google.com *****************************************************************************/ 2712855Sgabeblack@google.com 2812855Sgabeblack@google.com/***************************************************************************** 2912855Sgabeblack@google.com 3012855Sgabeblack@google.com MODIFICATION LOG - modifiers, enter your name, affiliation, date and 3112855Sgabeblack@google.com changes you are making here. 3212855Sgabeblack@google.com 3312855Sgabeblack@google.com Name, Affiliation, Date: 3412855Sgabeblack@google.com Description of Modification: 3512855Sgabeblack@google.com 3612855Sgabeblack@google.com *****************************************************************************/ 3712855Sgabeblack@google.com 3812855Sgabeblack@google.com#include "common.h" 3912855Sgabeblack@google.com 4012855Sgabeblack@google.comSC_MODULE( circ48 ) 4112855Sgabeblack@google.com{ 4212855Sgabeblack@google.com SC_HAS_PROCESS( circ48 ); 4312855Sgabeblack@google.com 4412855Sgabeblack@google.com sc_in_clk clk; 4512855Sgabeblack@google.com 4612855Sgabeblack@google.com sc_in<bool> reset; 4712855Sgabeblack@google.com sc_in<bool> x_ok; 4812855Sgabeblack@google.com sc_in<bool> y_ok; 4912855Sgabeblack@google.com sc_out<bool> out_wr; 5012855Sgabeblack@google.com sc_out<bool> out_sel; 5112855Sgabeblack@google.com sc_out<bool_vector> out_xy; 5212855Sgabeblack@google.com sc_out<bool_vector> diffs; 5312855Sgabeblack@google.com 5412855Sgabeblack@google.com void entry(); 5512855Sgabeblack@google.com 5612855Sgabeblack@google.com circ48( sc_module_name name_, 5712855Sgabeblack@google.com const sc_clock& clk_, 5812855Sgabeblack@google.com const sc_signal<bool>& reset_, 5912855Sgabeblack@google.com const sc_signal<bool>& x_ok_, 6012855Sgabeblack@google.com const sc_signal<bool>& y_ok_, 6112855Sgabeblack@google.com sc_signal<bool>& out_wr_, 6212855Sgabeblack@google.com sc_signal<bool>& out_sel_, 6312855Sgabeblack@google.com signal_bool_vector& out_xy_, 6412855Sgabeblack@google.com signal_bool_vector& diffs_ ) 6512855Sgabeblack@google.com : sc_module( name_ ) 6612855Sgabeblack@google.com { 6712855Sgabeblack@google.com clk( clk_ ); 6812855Sgabeblack@google.com reset( reset_ ); 6912855Sgabeblack@google.com x_ok( x_ok_ ); 7012855Sgabeblack@google.com y_ok( y_ok_ ); 7112855Sgabeblack@google.com out_wr( out_wr_ ); 7212855Sgabeblack@google.com out_sel( out_sel_ ); 7312855Sgabeblack@google.com out_xy( out_xy_ ); 7412855Sgabeblack@google.com diffs( diffs_ ); 7512855Sgabeblack@google.com SC_CTHREAD( entry, clk.pos() ); 7612855Sgabeblack@google.com reset_signal_is(reset,true); 7712855Sgabeblack@google.com } 7812855Sgabeblack@google.com}; 7912855Sgabeblack@google.com 8012855Sgabeblack@google.com 8112855Sgabeblack@google.com/*****************************************************************************/ 8212855Sgabeblack@google.com/** **/ 8312855Sgabeblack@google.com/** This function is the "clean" behavior (i.e. not written with synthesis **/ 8412855Sgabeblack@google.com/** or implementation in mind. This is a circle generator, that uses an **/ 8512855Sgabeblack@google.com/** algorithmic, interpolating technique. Origin of circle is fixed to **/ 8612855Sgabeblack@google.com/** point (0,0) **/ 8712855Sgabeblack@google.com/** NOTE: Extra WAIT at end for VGB (requires waits after signal assign) **/ 8812855Sgabeblack@google.com/** **/ 8912855Sgabeblack@google.com/*****************************************************************************/ 9012855Sgabeblack@google.com 9112855Sgabeblack@google.comvoid 9212855Sgabeblack@google.comcirc48::entry() 9312855Sgabeblack@google.com{ 9412855Sgabeblack@google.com sc_signed x(4); 9512855Sgabeblack@google.com sc_signed y(4); 9612855Sgabeblack@google.com sc_signed x_end(4); 9712855Sgabeblack@google.com sc_signed y_end(4); 9812855Sgabeblack@google.com sc_signed diff(8); 9912855Sgabeblack@google.com bool first; 10012855Sgabeblack@google.com 10112855Sgabeblack@google.com // reset initialization 10212855Sgabeblack@google.com 10312855Sgabeblack@google.com out_wr.write( 0 ); // Initialize at time zero ???? 10412855Sgabeblack@google.com out_sel.write( 0 ); 10512855Sgabeblack@google.com 10612855Sgabeblack@google.com // setup counter-clockwise circle generation 10712855Sgabeblack@google.com 10812855Sgabeblack@google.com while(true) { // Reset_loop 10912855Sgabeblack@google.com x_end = 4; 11012855Sgabeblack@google.com x = x_end; 11112855Sgabeblack@google.com diff = 0; 11212855Sgabeblack@google.com diffs.write(diff); 11312855Sgabeblack@google.com y_end = 4; 11412855Sgabeblack@google.com y = y_end; 11512855Sgabeblack@google.com first = true; 11612855Sgabeblack@google.com wait(); 11712855Sgabeblack@google.com 11812855Sgabeblack@google.com // perform counter-clockwise circle generation 11912855Sgabeblack@google.com 12012855Sgabeblack@google.com while(first || (x != x_end) || (y != y_end)) { // Main_loop 12112855Sgabeblack@google.com first = false; 12212855Sgabeblack@google.com diff = diff + 1; 12312855Sgabeblack@google.com 12412855Sgabeblack@google.com if (diff > 1) { 12512855Sgabeblack@google.com if ((x >= 0) && (y >= 0)) { 12612855Sgabeblack@google.com diff = diff - x - x; 12712855Sgabeblack@google.com x = x - 1; 12812855Sgabeblack@google.com } 12912855Sgabeblack@google.com else { // else_1_begin 13012855Sgabeblack@google.com if ((x < 0) && (y >= 0)) { 13112855Sgabeblack@google.com diff = diff - y - y; 13212855Sgabeblack@google.com y = y - 1; 13312855Sgabeblack@google.com } 13412855Sgabeblack@google.com else { // else_2_begin 13512855Sgabeblack@google.com if ((x < 0) && (y < 0)) { 13612855Sgabeblack@google.com diff = diff + x + x; 13712855Sgabeblack@google.com x = x + 1; 13812855Sgabeblack@google.com } 13912855Sgabeblack@google.com else { 14012855Sgabeblack@google.com diff = diff + y + y; 14112855Sgabeblack@google.com y = y + 1; 14212855Sgabeblack@google.com } 14312855Sgabeblack@google.com } // else_2_end 14412855Sgabeblack@google.com } // else_1_end 14512855Sgabeblack@google.com } 14612855Sgabeblack@google.com else { 14712855Sgabeblack@google.com if ((x >= 0) && (y >= 0)) { 14812855Sgabeblack@google.com diff = diff + y + y; 14912855Sgabeblack@google.com y = y + 1; 15012855Sgabeblack@google.com } 15112855Sgabeblack@google.com else { // else_3_begin 15212855Sgabeblack@google.com if ((x < 0) && (y >= 0)) { 15312855Sgabeblack@google.com diff = diff - x - x; 15412855Sgabeblack@google.com x = x - 1; 15512855Sgabeblack@google.com } 15612855Sgabeblack@google.com else { // else_4_begin 15712855Sgabeblack@google.com if ((x < 0) && (y < 0)) { 15812855Sgabeblack@google.com diff = diff - y - y; 15912855Sgabeblack@google.com y = y - 1; 16012855Sgabeblack@google.com } 16112855Sgabeblack@google.com else { 16212855Sgabeblack@google.com diff = x + x; 16312855Sgabeblack@google.com x = x + 1; 16412855Sgabeblack@google.com } 16512855Sgabeblack@google.com } // else_4_end 16612855Sgabeblack@google.com } // else_3_end 16712855Sgabeblack@google.com } 16812855Sgabeblack@google.com 16912855Sgabeblack@google.com // send the intermediate x value to port 17012855Sgabeblack@google.com 17112855Sgabeblack@google.com out_sel.write(0); // Select x 17212855Sgabeblack@google.com out_wr.write(1); // Output ready signal 17312855Sgabeblack@google.com out_xy.write(x); 17412855Sgabeblack@google.com diffs.write(diff); 17512855Sgabeblack@google.com wait(); 17612855Sgabeblack@google.com 17712855Sgabeblack@google.com // handshake x.. 17812855Sgabeblack@google.com 17912855Sgabeblack@google.com do { wait(); } while (x_ok == 0); 18012855Sgabeblack@google.com out_wr.write(0); 18112855Sgabeblack@google.com wait(); 18212855Sgabeblack@google.com 18312855Sgabeblack@google.com // send the intermediate y value to port 18412855Sgabeblack@google.com 18512855Sgabeblack@google.com out_sel.write(1); // Select y 18612855Sgabeblack@google.com out_wr.write(1); // Output ready signal 18712855Sgabeblack@google.com out_xy.write(y); 18812855Sgabeblack@google.com wait(); 18912855Sgabeblack@google.com 19012855Sgabeblack@google.com // handshake y.. 19112855Sgabeblack@google.com 19212855Sgabeblack@google.com do { wait(); } while (y_ok == 0); 19312855Sgabeblack@google.com out_wr.write(0); 19412855Sgabeblack@google.com wait(); 19512855Sgabeblack@google.com } // End of Main_loop 19612855Sgabeblack@google.com } // End of Reset_loop 19712855Sgabeblack@google.com} 198