com.sun.jdo.api.persistence.enhancer.classfile.InsnSingle Maven / Gradle / Ivy
/*
* Copyright (c) 1997, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.jdo.api.persistence.enhancer.classfile;
import java.io.PrintStream;
/**
* A java VM instruction which takes no immediate operands.
*/
public class InsnSingle extends Insn {
public int nStackArgs() {
return VMOp.ops[opcode()].nStackArgs();
}
public int nStackResults() {
return VMOp.ops[opcode()].nStackResults();
}
/**
* What are the types of the stack operands ?
*/
public String argTypes() {
return VMOp.ops[opcode()].argTypes();
}
/**
* What are the types of the stack results?
*/
public String resultTypes() {
return VMOp.ops[opcode()].resultTypes();
}
public boolean branches() {
switch (opcode()) {
case opc_ireturn:
case opc_lreturn:
case opc_freturn:
case opc_dreturn:
case opc_areturn:
case opc_return:
case opc_athrow:
return true;
default:
return false;
}
}
/* package local methods */
void print (PrintStream out, int indent) {
ClassPrint.spaces(out, indent);
out.println(offset() + " " + opName(opcode()));//NOI18N
}
int store(byte[] buf, int index) {
buf[index] = (byte) opcode();
return index+1;
}
int size() {
return 1;
}
/* Construct an instruction. The opcode must be one which requires
no operands */
InsnSingle(int theOpcode) {
this(theOpcode, NO_OFFSET);
}
/* The no-check constructor */
InsnSingle(int theOpcode, int theOffset) {
super(theOpcode, theOffset);
switch (theOpcode) {
case opc_nop:
case opc_aconst_null:
case opc_iconst_m1:
case opc_iconst_0:
case opc_iconst_1:
case opc_iconst_2:
case opc_iconst_3:
case opc_iconst_4:
case opc_iconst_5:
case opc_lconst_0:
case opc_lconst_1:
case opc_fconst_0:
case opc_fconst_1:
case opc_fconst_2:
case opc_dconst_0:
case opc_dconst_1:
case opc_iload_0:
case opc_iload_1:
case opc_iload_2:
case opc_iload_3:
case opc_lload_0:
case opc_lload_1:
case opc_lload_2:
case opc_lload_3:
case opc_fload_0:
case opc_fload_1:
case opc_fload_2:
case opc_fload_3:
case opc_dload_0:
case opc_dload_1:
case opc_dload_2:
case opc_dload_3:
case opc_aload_0:
case opc_aload_1:
case opc_aload_2:
case opc_aload_3:
case opc_iaload:
case opc_laload:
case opc_faload:
case opc_daload:
case opc_aaload:
case opc_baload:
case opc_caload:
case opc_saload:
case opc_istore_0:
case opc_istore_1:
case opc_istore_2:
case opc_istore_3:
case opc_lstore_0:
case opc_lstore_1:
case opc_lstore_2:
case opc_lstore_3:
case opc_fstore_0:
case opc_fstore_1:
case opc_fstore_2:
case opc_fstore_3:
case opc_dstore_0:
case opc_dstore_1:
case opc_dstore_2:
case opc_dstore_3:
case opc_astore_0:
case opc_astore_1:
case opc_astore_2:
case opc_astore_3:
case opc_iastore:
case opc_lastore:
case opc_fastore:
case opc_dastore:
case opc_aastore:
case opc_bastore:
case opc_castore:
case opc_sastore:
case opc_pop:
case opc_pop2:
case opc_dup:
case opc_dup_x1:
case opc_dup_x2:
case opc_dup2:
case opc_dup2_x1:
case opc_dup2_x2:
case opc_swap:
case opc_iadd:
case opc_ladd:
case opc_fadd:
case opc_dadd:
case opc_isub:
case opc_lsub:
case opc_fsub:
case opc_dsub:
case opc_imul:
case opc_lmul:
case opc_fmul:
case opc_dmul:
case opc_idiv:
case opc_ldiv:
case opc_fdiv:
case opc_ddiv:
case opc_irem:
case opc_lrem:
case opc_frem:
case opc_drem:
case opc_ineg:
case opc_lneg:
case opc_fneg:
case opc_dneg:
case opc_ishl:
case opc_lshl:
case opc_ishr:
case opc_lshr:
case opc_iushr:
case opc_lushr:
case opc_iand:
case opc_land:
case opc_ior:
case opc_lor:
case opc_ixor:
case opc_lxor:
case opc_i2l:
case opc_i2f:
case opc_i2d:
case opc_l2i:
case opc_l2f:
case opc_l2d:
case opc_f2i:
case opc_f2l:
case opc_f2d:
case opc_d2i:
case opc_d2l:
case opc_d2f:
case opc_i2b:
case opc_i2c:
case opc_i2s:
case opc_lcmp:
case opc_fcmpl:
case opc_fcmpg:
case opc_dcmpl:
case opc_dcmpg:
case opc_ireturn:
case opc_lreturn:
case opc_freturn:
case opc_dreturn:
case opc_areturn:
case opc_return:
case opc_xxxunusedxxx:
case opc_arraylength:
case opc_athrow:
case opc_monitorenter:
case opc_monitorexit:
break;
default:
throw new InsnError ("attempt to create an " + opName(opcode()) +//NOI18N
" without specifying the required operands");//NOI18N
}
}
}
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