diff options
Diffstat (limited to 'src/systemc/tests/systemc/misc/synth/synth-1.0/gcd/gcd.cpp')
| -rw-r--r-- | src/systemc/tests/systemc/misc/synth/synth-1.0/gcd/gcd.cpp | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/src/systemc/tests/systemc/misc/synth/synth-1.0/gcd/gcd.cpp b/src/systemc/tests/systemc/misc/synth/synth-1.0/gcd/gcd.cpp new file mode 100644 index 000000000..370324974 --- /dev/null +++ b/src/systemc/tests/systemc/misc/synth/synth-1.0/gcd/gcd.cpp @@ -0,0 +1,175 @@ +/***************************************************************************** + + Licensed to Accellera Systems Initiative Inc. (Accellera) under one or + more contributor license agreements. See the NOTICE file distributed + with this work for additional information regarding copyright ownership. + Accellera licenses this file to you under the Apache License, Version 2.0 + (the "License"); you may not use this file except in compliance with the + License. You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or + implied. See the License for the specific language governing + permissions and limitations under the License. + + *****************************************************************************/ + +/***************************************************************************** + + gcd.cpp -- + + Original Author: Martin Janssen, Synopsys, Inc., 2002-02-15 + + *****************************************************************************/ + +/***************************************************************************** + + MODIFICATION LOG - modifiers, enter your name, affiliation, date and + changes you are making here. + + Name, Affiliation, Date: + Description of Modification: + + *****************************************************************************/ + +#include "systemc.h" + +struct gcd_cc : public sc_module { + sc_in_clk clk; + sc_in<bool> reset; + sc_in<unsigned> a; + sc_in<unsigned> b; + sc_out<unsigned> c; + sc_out<bool> ready; + + void gcd_compute(); + + SC_HAS_PROCESS( gcd_cc ); + + gcd_cc( sc_module_name name ) + { + SC_CTHREAD( gcd_compute, clk.pos() ); + reset_signal_is(reset,true); + } +}; + +void +gcd_cc::gcd_compute() +{ + unsigned tmp_a = 0; + wait(); // Note that this wait() is required, otherwise, + // the reset is wrong! This is a problem with BC, + // not our frontend. + + while (true) { + unsigned tmp_b; + + c = tmp_a; + ready = true; + wait(); + + tmp_a = a; + tmp_b = b; + ready = false; + wait(); + + while (tmp_b != 0) { + + unsigned tmp_c = tmp_a; + tmp_a = tmp_b; + wait(); + + while (tmp_c >= tmp_b) { + tmp_c = tmp_c - tmp_b; + wait(); + } + + tmp_b = tmp_c; + wait(); + } + } +} + +static int numbers[] = { 49597, 41218, 20635, 40894, 16767, 17233, 36246, 28171, 60879, 49566, 10971, 24107, 30561, 49648, 50031, 12559, 23787, 35674, 43320, 37558, 840, 18689, 62466, 6308, 46271, 49801, 43433, 22683, 35494, 35259, 29020, 19555, 10941, 49656, 60450, 27709, 1353, 31160, 55880, 62232, 15190, 1315, 20803, 45751, 50963, 5298, 58311, 9215, 2378 }; +static unsigned numbers_index = 0; + +struct testbench : public sc_module { + sc_in_clk clk; + sc_inout<bool> reset; + sc_in<bool> ready; + sc_inout<unsigned> a; + sc_inout<unsigned> b; + sc_in<unsigned> c; + + void reset_gen(); + void stimu_gen(); + void display(); + + SC_HAS_PROCESS( testbench ); + + testbench( sc_module_name name ) + { + SC_CTHREAD( reset_gen, clk.pos() ); + SC_CTHREAD( stimu_gen, clk.pos() ); + SC_METHOD( display ); + sensitive << ready; + } +}; + +void +testbench::reset_gen() +{ + reset = 0; + wait(); + reset = 1; + wait(); + wait(); + reset = 0; + wait(); + /* die */ +} + +void +testbench::stimu_gen() +{ + while (true) { + do { wait(); } while (ready == 0); + a = (unsigned) numbers[numbers_index++ % (sizeof(numbers)/sizeof(numbers[0]))]; + b = (unsigned) numbers[(numbers_index*numbers_index) % (sizeof(numbers)/sizeof(numbers[0]))]; + numbers_index++; + } +} + +void +testbench::display() +{ + if (ready) { + cout << "reset = " << reset << " ready = " << ready + << " a = " << a << " b = " << b << " c = " << c << endl; + } +} + +int sc_main(int argc, char* argv[] ) +{ + sc_signal<unsigned> a("a"), b("b"), c("c"); + sc_clock clk("clk", 20, SC_NS); + sc_signal<bool> reset("reset"), ready("ready"); + + a = 0; + b = 0; + c = 0; + reset = false; + ready = false; + + gcd_cc gcd("gcd"); + gcd(clk, reset, a, b, c, ready); + + testbench tb("tb"); + tb(clk, reset, ready, a, b, c); + + sc_start(2000000, SC_NS); + return 0; +} |