open-source/haidnorJVM
1
0
Fork 0
mirror of https://github.com/FranzHaidnor/haidnorJVM.git synced 2026-03-13 21:43:42 +08:00
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #2 from shanhuo6/master

Browse Source 
switch的支持
This commit is contained in:
Franz Haidnor
2023-12-29 09:05:09 +08:00
committed by GitHub
parent a87e2e2958 0e785d5556
commit ebc029ee12
6 changed files with 109 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
src/main/java/haidnor/jvm/instruction/InstructionFactory.java
View File

@@ -526,10 +526,10 @@ public abstract class InstructionFactory {
return new RET(codeStream);
}
case Const.TABLESWITCH -> {
return new TABLESWITCH(codeStream); // TODO
return new TABLESWITCH(codeStream);
}
case Const.LOOKUPSWITCH -> {
return new LOOKUPSWITCH(codeStream); // TODO
return new LOOKUPSWITCH(codeStream);
}
case Const.IRETURN -> {
return new IRETURN(codeStream);

34
src/main/java/haidnor/jvm/instruction/control/LOOKUPSWITCH.java
View File

@@ -1,19 +1,47 @@
package haidnor.jvm.instruction.control;
import haidnor.jvm.instruction.Instruction;
import haidnor.jvm.runtime.Frame;
import haidnor.jvm.core.CodeStream;
import lombok.extern.slf4j.Slf4j;
import java.util.LinkedHashMap;
import java.util.Map;
@Slf4j
public class LOOKUPSWITCH extends Instruction {
private final int count;//索引数量
private final int jump_default;//默认跳转
private final Map<Integer,Integer> map;//映射表
public LOOKUPSWITCH(CodeStream codeStream) {
super(codeStream);
throw new UnsupportedOperationException("LOOKUPSWITCH");
this.jump_default = codeStream.readInt(this);
this.count = codeStream.readInt(this);
this.map = new LinkedHashMap<>();
for(int i=0;i<count;i++)
{
map.put(codeStream.readInt(this),codeStream.readInt(this));
//创建映射表
}
}
@Override
public void execute(Frame frame) {
throw new UnsupportedOperationException("LOOKUPSWITCH");
int value = frame.popInt();//取出index
Integer offSet = map.getOrDefault(value, jump_default);//得到跳转值
super.setOffSet(offSet);
/* frame.push(new StackValue(Const.T_INT,offSet+super.getOffSet()));//把跳转值压入栈中*/
}
}

24
src/main/java/haidnor/jvm/instruction/control/TABLESWITCH.java
View File

@@ -3,17 +3,37 @@ package haidnor.jvm.instruction.control;
import haidnor.jvm.instruction.Instruction;
import haidnor.jvm.runtime.Frame;
import haidnor.jvm.core.CodeStream;
import lombok.extern.slf4j.Slf4j;
import java.util.LinkedHashMap;
import java.util.Map;
@Slf4j
public class TABLESWITCH extends Instruction {
private final int low_case_value;//最小值
private final int high_case_value;//最大值
private final int jump_default;//默认跳转
private final Map<Integer,Integer> map;//映射表
public TABLESWITCH(CodeStream codeStream) {
super(codeStream);
throw new UnsupportedOperationException("TABLESWITCH");
this.jump_default = codeStream.readInt(this);
this.low_case_value = codeStream.readInt(this);
this.high_case_value = codeStream.readInt(this);
this.map = new LinkedHashMap<>();
for(int i=low_case_value;i<=high_case_value;i++)
{
map.put(i,codeStream.readInt(this));
//创建映射表
}
}
@Override
public void execute(Frame frame) {
throw new UnsupportedOperationException("TABLESWITCH");
int value = frame.popInt();//取出index
Integer offSet = map.getOrDefault(value, jump_default);//得到跳转值
super.setOffSet(offSet);
}
}

8
src/test/java/haidnor/jvm/test/TestJVM.java
View File

@@ -158,6 +158,14 @@ public class TestJVM {
public void test_Array() throws Exception {
HaidnorJVM.testRun(Array.class);
}
@Test
public void test_Switch_table() throws Exception {
HaidnorJVM.testRun(demo_switch_table.class);
}
@Test
public void test_Switch_lookup() throws Exception {
HaidnorJVM.testRun(demo_switch_lookup.class);
}
@Test
public void test_() throws Exception {

23
src/test/java/haidnor/jvm/test/demo/demo_switch_lookup.java Normal file
View File

@@ -0,0 +1,23 @@
package haidnor.jvm.test.demo;
public class demo_switch_lookup {
public static void main(String[] args) {
//LOOKUPSWITCH的demo
int i = 1;
switch (i) {
case 1:
System.out.println("1");
break;
case 2:
System.out.println("2");
break;
case 10:
System.out.println("10");
break;
default:
System.out.println("default");
break;
}
}
}

23
src/test/java/haidnor/jvm/test/demo/demo_switch_table.java Normal file
View File

@@ -0,0 +1,23 @@
package haidnor.jvm.test.demo;
public class demo_switch_table {
public static void main(String[] args) {
int i = 3;
switch (i) {
case 1:
System.out.println("1");
break;
case 2:
System.out.println("2");
break;
case 3:
System.out.println("3");
break;
case 4:
System.out.println("4");
break;
default:
System.out.println("0");
}
}
}