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/*
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*
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package com.sun.jdo.api.persistence.enhancer.classfile;
import java.io.PrintStream;
/**
* An instruction which requires a integral constant as an immediate operand
*/
public class InsnIntOp extends Insn {
/* The operand */
private int operandValue;
/* public accessors */
public int nStackArgs() {
return VMOp.ops[opcode()].nStackArgs();
}
public int nStackResults() {
return VMOp.ops[opcode()].nStackResults();
}
public String argTypes() {
return VMOp.ops[opcode()].argTypes();
}
public String resultTypes() {
return VMOp.ops[opcode()].resultTypes();
}
public boolean branches() {
return opcode() == opc_ret;
}
public int value() {
return operandValue;
}
/* package local methods */
static String primType(int primIndex) {
switch (primIndex) {
case T_BOOLEAN:
return "boolean";//NOI18N
case T_CHAR:
return "char";//NOI18N
case T_FLOAT:
return "float";//NOI18N
case T_DOUBLE:
return "double";//NOI18N
case T_BYTE:
return "byte";//NOI18N
case T_SHORT:
return "short";//NOI18N
case T_INT:
return "int";//NOI18N
case T_LONG:
return "long";//NOI18N
default:
throw new InsnError ("Invalid primitive type(" + primIndex + ")");//NOI18N
}
}
void print (PrintStream out, int indent) {
ClassPrint.spaces(out, indent);
if (opcode() == opc_newarray)
out.println(offset() + " opc_newarray " + primType(operandValue));//NOI18N
else
out.println(offset() + " " + opName(opcode()) + " " + operandValue);//NOI18N
}
int store(byte[] buf, int index) {
if (size() == 4) {
/* prefix with an opc_wide */
buf[index++] = (byte) opc_wide;
}
buf[index++] = (byte) opcode();
if (size() > 2)
buf[index++] = (byte)(operandValue >> 8);
buf[index++] = (byte)(operandValue & 0xff);
return index;
}
/* return the size of the instruction in bytes */
int size() {
switch(opcode()) {
case opc_bipush:
case opc_newarray:
/* These are always 1 byte constants */
return 2;
case opc_sipush: /* a short constant */
/* This is always a 2 byte constant */
return 3;
case opc_iload:
case opc_lload:
case opc_fload:
case opc_dload:
case opc_aload:
case opc_istore:
case opc_lstore:
case opc_fstore:
case opc_dstore:
case opc_astore:
case opc_ret:
/* These can be one or two byte constants specifying a local var.
* If a two byte constant, the constant is prefixed by a wide
* instruction */
if (operandValue < 256)
return 2;
else
return 4;
default:
throw new InsnError ("invalid instruction " + opName(opcode()) +//NOI18N
" with an integer operand");//NOI18N
}
}
InsnIntOp (int theOpcode, int theOperand, int pc) {
super(theOpcode, pc);
operandValue = theOperand;
}
InsnIntOp (int theOpcode, int theOperand) {
super(theOpcode, NO_OFFSET);
operandValue = theOperand;
switch(theOpcode) {
case opc_bipush:
case opc_newarray:
/* These are always 1 byte constants */
case opc_sipush: /* a short constant */
/* This is always a 2 byte constant */
case opc_dload:
case opc_lload:
case opc_iload:
case opc_fload:
case opc_aload:
case opc_istore:
case opc_lstore:
case opc_fstore:
case opc_dstore:
case opc_astore:
case opc_ret:
/* These can be one or two byte constants specifying a local var */
break;
default:
throw new InsnError ("attempt to create an " + opName(theOpcode) +//NOI18N
" with an integer operand");//NOI18N
}
}
}