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feat: 支持 short16 转 byte8、long64、float32、double64

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zhangxun 2025-06-28 20:31:16 +08:00
parent 8340e2bacc
commit 9d7d03e91c
4 changed files with 188 additions and 0 deletions
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47
src/main/java/org/jcnc/snow/vm/commands/type/conversion/S2BCommand.java Normal file
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package org.jcnc.snow.vm.commands.type.conversion;
import org.jcnc.snow.vm.interfaces.Command;
import org.jcnc.snow.vm.module.CallStack;
import org.jcnc.snow.vm.module.LocalVariableStore;
import org.jcnc.snow.vm.module.OperandStack;
/**
* S2BCommand Opcode: Represents the type conversion operation from short16 to byte8 in the virtual machine.
* <p>This opcode is implemented by the {@link S2BCommand} class, which defines its specific execution logic.</p>
*
* <p>Execution Steps:</p>
* <ol>
* <li>Pop the top short16 value from the operand stack.</li>
* <li>Convert the short16 value to a byte8 value.</li>
* <li>Push the converted byte8 value back onto the operand stack for subsequent operations.</li>
* </ol>
*
* <p>This opcode is used to widen a short16 value to a byte8 type, facilitating subsequent integer arithmetic or comparison operations.</p>
*/
public class S2BCommand implements Command {
/**
* Default constructor for creating an instance of S2BCommand.
*/
public S2BCommand() {
// Empty constructor
}
/**
* Executes the short16 to byte8 conversion operation.
*
* @param parts The array of instruction parameters, which is not used in this operation.
* @param currentPC The current program counter, representing the instruction address.
* @param operandStack The operand stack of the virtual machine.
* @param localVariableStore The local variable store for managing method-local variables.
* @param callStack The call stack of the virtual machine.
* @return The updated program counter after execution.
*/
@Override
public int execute(String[] parts, int currentPC, OperandStack operandStack,
LocalVariableStore localVariableStore, CallStack callStack) {
byte convertedValue = (byte) ((short) operandStack.pop());
operandStack.push(convertedValue);
return currentPC + 1;
}
}

47
src/main/java/org/jcnc/snow/vm/commands/type/conversion/S2DCommand.java Normal file
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package org.jcnc.snow.vm.commands.type.conversion;
import org.jcnc.snow.vm.interfaces.Command;
import org.jcnc.snow.vm.module.CallStack;
import org.jcnc.snow.vm.module.LocalVariableStore;
import org.jcnc.snow.vm.module.OperandStack;
/**
* S2DCommand Opcode: Represents the type conversion operation from short16 to double64 in the virtual machine.
* <p>This opcode is implemented by the {@link S2DCommand} class, which defines its specific execution logic.</p>
*
* <p>Execution Steps:</p>
* <ol>
* <li>Pop the top short16 value from the operand stack.</li>
* <li>Convert the short16 value to an double64 value.</li>
* <li>Push the converted double64 value back onto the operand stack for subsequent operations.</li>
* </ol>
*
* <p>This opcode is used to widen a short16 value to an double64 type, facilitating subsequent integer arithmetic or comparison operations.</p>
*/
public class S2DCommand implements Command {
/**
* Default constructor for creating an instance of S2DCommand.
*/
public S2DCommand() {
// Empty constructor
}
/**
* Executes the short16 to double64 conversion operation.
*
* @param parts The array of instruction parameters, which is not used in this operation.
* @param currentPC The current program counter, representing the instruction address.
* @param operandStack The operand stack of the virtual machine.
* @param localVariableStore The local variable store for managing method-local variables.
* @param callStack The call stack of the virtual machine.
* @return The updated program counter after execution.
*/
@Override
public int execute(String[] parts, int currentPC, OperandStack operandStack,
LocalVariableStore localVariableStore, CallStack callStack) {
double convertedValue = (short) operandStack.pop();
operandStack.push(convertedValue);
return currentPC + 1;
}
}

47
src/main/java/org/jcnc/snow/vm/commands/type/conversion/S2FCommand.java Normal file
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package org.jcnc.snow.vm.commands.type.conversion;
import org.jcnc.snow.vm.interfaces.Command;
import org.jcnc.snow.vm.module.CallStack;
import org.jcnc.snow.vm.module.LocalVariableStore;
import org.jcnc.snow.vm.module.OperandStack;
/**
* S2FCommand Opcode: Represents the type conversion operation from short16 to float32 in the virtual machine.
* <p>This opcode is implemented by the {@link S2FCommand} class, which defines its specific execution logic.</p>
*
* <p>Execution Steps:</p>
* <ol>
* <li>Pop the top short16 value from the operand stack.</li>
* <li>Convert the short16 value to an float32 value.</li>
* <li>Push the converted float32 value back onto the operand stack for subsequent operations.</li>
* </ol>
*
* <p>This opcode is used to widen a short16 value to an float32 type, facilitating subsequent integer arithmetic or comparison operations.</p>
*/
public class S2FCommand implements Command {
/**
* Default constructor for creating an instance of S2FCommand.
*/
public S2FCommand() {
// Empty constructor
}
/**
* Executes the short16 to float32 conversion operation.
*
* @param parts The array of instruction parameters, which is not used in this operation.
* @param currentPC The current program counter, representing the instruction address.
* @param operandStack The operand stack of the virtual machine.
* @param localVariableStore The local variable store for managing method-local variables.
* @param callStack The call stack of the virtual machine.
* @return The updated program counter after execution.
*/
@Override
public int execute(String[] parts, int currentPC, OperandStack operandStack,
LocalVariableStore localVariableStore, CallStack callStack) {
float convertedValue = (short) operandStack.pop();
operandStack.push(convertedValue);
return currentPC + 1;
}
}

47
src/main/java/org/jcnc/snow/vm/commands/type/conversion/S2LCommand.java Normal file
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package org.jcnc.snow.vm.commands.type.conversion;
import org.jcnc.snow.vm.interfaces.Command;
import org.jcnc.snow.vm.module.CallStack;
import org.jcnc.snow.vm.module.LocalVariableStore;
import org.jcnc.snow.vm.module.OperandStack;
/**
* S2LCommand Opcode: Represents the type conversion operation from short16 to long64 in the virtual machine.
* <p>This opcode is implemented by the {@link S2LCommand} class, which defines its specific execution logic.</p>
*
* <p>Execution Steps:</p>
* <ol>
* <li>Pop the top short16 value from the operand stack.</li>
* <li>Convert the short16 value to a long64 value.</li>
* <li>Push the converted long64 value back onto the operand stack for subsequent operations.</li>
* </ol>
*
* <p>This opcode is used to widen a short16 value to a long64 type, facilitating subsequent integer arithmetic or comparison operations.</p>
*/
public class S2LCommand implements Command {
/**
* Default constructor for creating an instance of S2LCommand.
*/
public S2LCommand() {
// Empty constructor
}
/**
* Executes the short16 to long64 conversion operation.
*
* @param parts The array of instruction parameters, which is not used in this operation.
* @param currentPC The current program counter, representing the instruction address.
* @param operandStack The operand stack of the virtual machine.
* @param localVariableStore The local variable store for managing method-local variables.
* @param callStack The call stack of the virtual machine.
* @return The updated program counter after execution.
*/
@Override
public int execute(String[] parts, int currentPC, OperandStack operandStack,
LocalVariableStore localVariableStore, CallStack callStack) {
long convertedValue = (short) operandStack.pop();
operandStack.push(convertedValue);
return currentPC + 1;
}
}