simon987/Much-Assembly-Required
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Merge pull request #189 from KevinRamharak/possible-implementation-aliases

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add implementation for instruction aliases
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Simon Fortier 2019-01-21 19:55:17 -05:00 committed by GitHub
commit a768cf0f4b
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1 changed files with 20 additions and 6 deletions
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26
Server/src/main/java/net/simon987/server/assembly/DefaultInstructionSet.java
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@ -4,6 +4,7 @@ import net.simon987.server.assembly.instruction.*;
import net.simon987.server.logging.LogManager;
import java.util.HashMap;
import java.util.Map;
/**
* Default instruction set for the CPU
@ -13,7 +14,12 @@ public class DefaultInstructionSet implements InstructionSet {
/**
* Map of instructions, stored in opcode : Instruction format
*/
private HashMap<Integer, Instruction> instructionMap = new HashMap<>(32);
private Map<Integer, Instruction> instructionMap = new HashMap<>(32);
/**
* Map of aliasses, stored in mnemonic : Instruction format
*/
private Map<String, Instruction> aliasesMap = new HashMap<>(16);
private Instruction defaultInstruction;
@ -32,7 +38,6 @@ public class DefaultInstructionSet implements InstructionSet {
add(new AndInstruction());
add(new OrInstruction());
add(new ShlInstruction());
add(new SalInstruction()); //Alias is added
add(new ShrInstruction());
add(new XorInstruction());
add(new TestInstruction());
@ -46,6 +51,9 @@ public class DefaultInstructionSet implements InstructionSet {
add(new SarInstruction());
add(new IncInstruction());
add(new DecInstruction());
// aliases
add(new SalInstruction());
}
/**
@ -86,16 +94,22 @@ public class DefaultInstructionSet implements InstructionSet {
}
}
Instruction aliasedInstruction = aliasesMap.get(mnemonic.toLowerCase());
if (aliasedInstruction != null) {
return aliasedInstruction;
}
return null;
}
@Override
public void add(Instruction instruction) {
if (instructionMap.containsKey(instruction.getOpCode())) {
LogManager.LOGGER.fine(instruction.getMnemonic() + " instruction is an alias for " +
instructionMap.get(instruction.getOpCode()).getMnemonic());
Instruction aliasedInstruction = instructionMap.get(instruction.getOpCode());
if (aliasedInstruction != null) {
aliasesMap.put(instruction.getMnemonic(), aliasedInstruction);
} else {
instructionMap.put(instruction.getOpCode(), instruction);
}
instructionMap.put(instruction.getOpCode(), instruction);
}
}