67 lines
1.9 KiB
Java
67 lines
1.9 KiB
Java
package processor.pipeline;
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import generic.Simulator;
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import generic.Instruction;
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import generic.Instruction.OperationType;
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import processor.Processor;
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public class RegisterWrite {
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Processor containingProcessor;
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MA_RW_LatchType MA_RW_Latch;
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IF_EnableLatchType IF_EnableLatch;
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EX_MA_LatchType EX_MA_Latch;
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public RegisterWrite(Processor containingProcessor, MA_RW_LatchType mA_RW_Latch, IF_EnableLatchType iF_EnableLatch, EX_MA_LatchType eX_MA_Latch)
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{
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this.containingProcessor = containingProcessor;
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this.MA_RW_Latch = mA_RW_Latch;
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this.IF_EnableLatch = iF_EnableLatch;
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this.EX_MA_Latch = eX_MA_Latch;
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}
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public void performRW()
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{
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if(MA_RW_Latch.isRW_enable())
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{
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Instruction instruction = MA_RW_Latch.getInstruction();
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OperationType op_type = instruction.getOperationType();
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int alu_result = MA_RW_Latch.getALU_result();
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boolean proceed = true;
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if (op_type==OperationType.load)
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{
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EX_MA_Latch.setMA_busy(false);
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int load_result = MA_RW_Latch.getLoad_result();
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int rd = instruction.getDestinationOperand().getValue();
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containingProcessor.getRegisterFile().setValue(rd, load_result);
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}
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else if (op_type==OperationType.end)
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{
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Simulator.setSimulationComplete(true);
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proceed = false;
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}
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else
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{
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if (op_type!=OperationType.store && op_type!= OperationType.jmp && op_type!= OperationType.beq && op_type!=OperationType.bne && op_type!=OperationType.blt && op_type!=OperationType.bgt)
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{
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int rd = instruction.getDestinationOperand().getValue();
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rd = instruction.getDestinationOperand().getValue();
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containingProcessor.getRegisterFile().setValue(rd, alu_result);
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}
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}
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IF_EnableLatch.setIF_enable(proceed);
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}else{
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try{
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if(MA_RW_Latch.getInstruction().getOperationType() == OperationType.end){
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IF_EnableLatch.setIF_enable(false);
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}
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else{
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IF_EnableLatch.setIF_enable(true);
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}
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} catch(Exception e){
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IF_EnableLatch.setIF_enable(true);
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}
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}
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}
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}
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