93 lines
2.3 KiB
Java
93 lines
2.3 KiB
Java
package generic;
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import java.io.FileInputStream;
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import java.io.InputStream;
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import processor.Clock;
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import processor.Processor;
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public class Simulator {
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static Processor processor;
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static boolean simulationComplete;
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public static void setupSimulation(String assemblyProgramFile, Processor p)
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{
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Simulator.processor = p;
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loadProgram(assemblyProgramFile);
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simulationComplete = false;
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}
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static void loadProgram(String assemblyProgramFile)
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{
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/*
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* 1. load the program into memory according to the program layout described
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* in the ISA specification
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* 2. set PC to the address of the first instruction in the main
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* 3. set the following registers:
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* x0 = 0
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* x1 = 65535
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* x2 = 65535
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*/
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try (
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InputStream is = new FileInputStream(assemblyProgramFile);
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){
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int i = 0;
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byte[] line = new byte[4];
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boolean isFirstLine = true;
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while(is.read(line) != -1) {
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int value = 0;
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for(int j = 0; j < 4; j++) {
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value = (value << 8) | (line[j] & 0xff);
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}
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System.out.println(value);
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if(isFirstLine) {
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processor.getRegisterFile().setProgramCounter(value);
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isFirstLine = false;
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}else{
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processor.getMainMemory().setWord(i, value);
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i++;
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}
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}
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processor.getRegisterFile().setValue(0, 0);
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processor.getRegisterFile().setValue(1, 65535);
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processor.getRegisterFile().setValue(2, 65535);
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// Debug
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System.out.println(processor.getRegisterFile().getProgramCounter());
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System.out.println(processor.getMainMemory().getContentsAsString(0, 10));
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} catch (Exception e) {
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e.printStackTrace();
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}
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}
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public static void simulate()
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{
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while(simulationComplete == false)
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{
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processor.getIFUnit().performIF();
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Clock.incrementClock();
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processor.getOFUnit().performOF();
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Clock.incrementClock();
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processor.getEXUnit().performEX();
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Clock.incrementClock();
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processor.getMAUnit().performMA();
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Clock.incrementClock();
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processor.getRWUnit().performRW();
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Clock.incrementClock();
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Statistics.setNumberOfInstructions(Statistics.getNumberOfInstructions() + 1);
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Statistics.setNumberOfCycles(Statistics.getNumberOfCycles() + 1);
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}
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// TODO
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// set statistics
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}
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public static void setSimulationComplete(boolean value)
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{
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simulationComplete = value;
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}
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}
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