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CodeGenerator.java
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CodeGenerator.java
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package cop5556sp18;
import java.util.List;
import java.util.ArrayList;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import cop5556sp18.RuntimeFunctions;
import cop5556sp18.RuntimeImageSupport;
import cop5556sp18.Types.Type;
import cop5556sp18.AST.ASTNode;
import cop5556sp18.AST.ASTVisitor;
import cop5556sp18.AST.Block;
import cop5556sp18.AST.Declaration;
import cop5556sp18.AST.Expression;
import cop5556sp18.AST.ExpressionBinary;
import cop5556sp18.AST.ExpressionBooleanLiteral;
import cop5556sp18.AST.ExpressionConditional;
import cop5556sp18.AST.ExpressionFloatLiteral;
import cop5556sp18.AST.ExpressionFunctionAppWithExpressionArg;
import cop5556sp18.AST.ExpressionFunctionAppWithPixel;
import cop5556sp18.AST.ExpressionIdent;
import cop5556sp18.AST.ExpressionIntegerLiteral;
import cop5556sp18.AST.ExpressionPixel;
import cop5556sp18.AST.ExpressionPixelConstructor;
import cop5556sp18.AST.ExpressionPredefinedName;
import cop5556sp18.AST.ExpressionUnary;
import cop5556sp18.AST.LHS;
import cop5556sp18.AST.LHSIdent;
import cop5556sp18.AST.LHSPixel;
import cop5556sp18.AST.LHSSample;
import cop5556sp18.AST.PixelSelector;
import cop5556sp18.AST.Program;
import cop5556sp18.AST.StatementAssign;
import cop5556sp18.AST.StatementIf;
import cop5556sp18.AST.StatementInput;
import cop5556sp18.AST.StatementShow;
import cop5556sp18.AST.StatementSleep;
import cop5556sp18.AST.StatementWhile;
import cop5556sp18.AST.StatementWrite;
import cop5556sp18.CodeGenUtils;
import cop5556sp18.Scanner.Kind;
public class CodeGenerator implements ASTVisitor, Opcodes {
/**
* All methods and variable static.
*/
static final int Z = 255;
ClassWriter cw;
String className;
String classDesc;
String sourceFileName;
MethodVisitor mv; // visitor of method currently under construction
/** Indicates whether genPrint and genPrintTOS should generate code. */
final boolean DEVEL;
final boolean GRADE;
final int defaultWidth;
final int defaultHeight;
static int slotNumber = 1;
List <LocalVarsVisit> decs = new ArrayList<LocalVarsVisit>();
// final boolean itf = false;
/**
* @param DEVEL
* used as parameter to genPrint and genPrintTOS
* @param GRADE
* used as parameter to genPrint and genPrintTOS
* @param sourceFileName
* name of source file, may be null.
* @param defaultWidth
* default width of images
* @param defaultHeight
* default height of images
*/
public CodeGenerator(boolean DEVEL, boolean GRADE, String sourceFileName,
int defaultWidth, int defaultHeight) {
super();
this.DEVEL = DEVEL;
this.GRADE = GRADE;
this.sourceFileName = sourceFileName;
this.defaultWidth = defaultWidth;
this.defaultHeight = defaultHeight;
}
@Override
public Object visitProgram(Program program, Object arg) throws Exception {
// TODO refactor and extend as necessary
cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
// cw = new ClassWriter(0); //If the call to mv.visitMaxs(1, 1) crashes,
// it is
// sometime helpful to
// temporarily run it without COMPUTE_FRAMES. You probably
// won't get a completely correct classfile, but
// you will be able to see the code that was
// generated.
className = program.progName;
classDesc = "L" + className + ";";
String sourceFileName = (String) arg;
cw.visit(52, ACC_PUBLIC + ACC_SUPER, className, null,"java/lang/Object", null);
cw.visitSource(sourceFileName, null);
// create main method
mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null);
// initialize
mv.visitCode();
// add label before first instruction
Label mainStart = new Label();
mv.visitLabel(mainStart);
CodeGenUtils.genLog(DEVEL, mv, "entering main");
program.block.visit(this, arg);
// generates code to add string to log
CodeGenUtils.genLog(DEVEL, mv, "leaving main");
// adds the required (by the JVM) return statement to main
mv.visitInsn(RETURN);
// adds label at end of code
Label mainEnd = new Label();
mv.visitLabel(mainEnd);
mv.visitLocalVariable("args", "[Ljava/lang/String;", null, mainStart,
mainEnd, 0);
int counter = 0;
//System.out.print("size: " + decs.size());
while(decs.size() > counter)
{
String name = decs.get(counter).dec.name;
Label a = decs.get(counter).begin;
Label z = decs.get(counter).end;
int slot = decs.get(counter).dec.getSlot();
Type decType = Types.getType(decs.get(counter).dec.type);
// System.out.println(decType);
if (decType == Type.BOOLEAN )
mv.visitLocalVariable(name, "Z", null, a, z, slot);
else if (decType == Type.INTEGER)
mv.visitLocalVariable(name, "I", null, a, z, slot);
else if (decType == Type.FLOAT)
mv.visitLocalVariable(name, "F", null, a, z, slot);
else if (decType == Type.IMAGE)
mv.visitLocalVariable(name, RuntimeImageSupport.ImageDesc, null, a, z, slot);
else if (decType == Type.FILE)
mv.visitLocalVariable(name, "Ljava/lang/String;", null, a, z, slot);
counter++;
}
// Because we use ClassWriter.COMPUTE_FRAMES as a parameter in the
// constructor,
// asm will calculate this itself and the parameters are ignored.
// If you have trouble with failures in this routine, it may be useful
// to temporarily change the parameter in the ClassWriter constructor
// from COMPUTE_FRAMES to 0.
// The generated classfile will not be correct, but you will at least be
// able to see what is in it.
mv.visitMaxs(0, 0);
// terminate construction of main method
mv.visitEnd();
// terminate class construction
cw.visitEnd();
// generate classfile as byte array and return
return cw.toByteArray();
}
@Override
public Object visitBlock(Block block, Object arg) throws Exception
{
Label start_block = new Label();
Label end_block = new Label();
mv.visitLabel(start_block);
for (ASTNode node : block.decsOrStatements) {
node.visit(this, null);
}
mv.visitLabel(end_block);
for (ASTNode node : block.decsOrStatements) {
if (node instanceof Declaration)
{
LocalVarsVisit obj = new LocalVarsVisit((Declaration)node,start_block,end_block);
decs.add(obj);
}
}
return null;
}
@Override
public Object visitDeclaration(Declaration declaration, Object arg)
throws Exception {
// TODO Auto-generated method stub
Expression width = declaration.width;
Expression height = declaration.height;
declaration.setSlot(slotNumber++);
//slotNumber++;
Type dectype = Types.getType(declaration.type);
if (dectype == Type.IMAGE)
{
if (width != null && height != null)
{
width.visit(this, arg);
height.visit(this, arg);
mv.visitMethodInsn(INVOKESTATIC, RuntimeImageSupport.className, "makeImage", RuntimeImageSupport.makeImageSig, false);
}
else if (width == null && height == null)
{
mv.visitLdcInsn(defaultWidth);
mv.visitLdcInsn(defaultHeight);
mv.visitMethodInsn(INVOKESTATIC, RuntimeImageSupport.className, "makeImage", RuntimeImageSupport.makeImageSig, false);
}
// mv.visitFieldInsn(PUTFIELD, className, declaration.name, "Ljava/awt/image/BufferedImage");
mv.visitVarInsn(ASTORE, declaration.getSlot());
}
return null;
}
@Override
public Object visitStatementInput(StatementInput statementInput, Object arg)
throws Exception {
// TODO Auto-generated method stub
Declaration dec = statementInput.dec;
mv.visitVarInsn(ALOAD, 0);
statementInput.e.visit(this, arg);
mv.visitInsn(AALOAD);
if (Types.getType(dec.type) == Type.IMAGE)
{
Expression wd = dec.width;
Expression ht = dec.height;
if (wd == null && ht == null)
{
mv.visitInsn(ACONST_NULL); //pushes null
mv.visitInsn(ACONST_NULL);
}
else
{
wd.visit(this, null);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;",false);
ht.visit(this, null);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;",false);
}
mv.visitMethodInsn(INVOKESTATIC, RuntimeImageSupport.className,"readImage", RuntimeImageSupport.readImageSig,false);
mv.visitVarInsn(ASTORE, dec.getSlot());
}
else if (Types.getType(dec.type) == Type.INTEGER)
{
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "parseInt", "(Ljava/lang/String;)I", false);
mv.visitVarInsn(ISTORE, dec.getSlot());
}
else if (Types.getType(dec.type) == Type.FLOAT)
{
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Float", "parseFloat", "(Ljava/lang/String;)F", false);
mv.visitVarInsn(FSTORE, dec.getSlot());
}
else if (Types.getType(dec.type) == Type.BOOLEAN)
{
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Boolean", "parseBoolean", "(Ljava/lang/String;)Z", false);
mv.visitVarInsn(ISTORE, dec.getSlot());
}
else if (Types.getType(dec.type) == Type.FILE)
{
mv.visitVarInsn(ASTORE, dec.getSlot());
}
return null;
}
@Override
public Object visitStatementAssign(StatementAssign statementAssign,
Object arg) throws Exception {
// TODO Auto-generated method stub
Expression ex = statementAssign.e;
LHS lhs = statementAssign.lhs;
ex.visit(this,arg);
lhs.visit(this,arg);
return null;
}
@SuppressWarnings("incomplete-switch")
@Override
public Object visitStatementShow(StatementShow statementShow, Object arg)
throws Exception {
/**
* TODO refactor and complete implementation.
*
* For integers, booleans, and floats, generate code to print to
* console. For images, generate code to display in a frame.
*
* In all cases, invoke CodeGenUtils.genLogTOS(GRADE, mv, type); before
* consuming top of stack.
*/
statementShow.e.visit(this, arg);
Type type = statementShow.e.type;
switch (type) {
case INTEGER : {
CodeGenUtils.genLogTOS(GRADE, mv, type);
mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out",
"Ljava/io/PrintStream;");
mv.visitInsn(Opcodes.SWAP);
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream",
"println", "(I)V", false);
}
break;
case BOOLEAN : {
CodeGenUtils.genLogTOS(GRADE, mv, type);
mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out","Ljava/io/PrintStream;");
mv.visitInsn(Opcodes.SWAP);
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream",
"println", "(Z)V", false);
}
break;
case FLOAT : {
CodeGenUtils.genLogTOS(GRADE, mv, type);
mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out","Ljava/io/PrintStream;");
mv.visitInsn(Opcodes.SWAP);
mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream",
"println", "(F)V", false);
}
// case FILE : {
// CodeGenUtils.genLogTOS(GRADE, mv, type);
// mv.visitFieldInsn(Opcodes.GETSTATIC, "java/lang/System", "out","Ljava/io/PrintStream;");
// mv.visitInsn(Opcodes.SWAP);
// mv.visitMethodInsn(Opcodes.INVOKEVIRTUAL, "java/io/PrintStream",
// "println", "()V", false);
// }
break;
case IMAGE : {
CodeGenUtils.genLogTOS(GRADE, mv, type);
mv.visitMethodInsn(INVOKESTATIC, RuntimeImageSupport.className, "makeFrame", RuntimeImageSupport.makeFrameSig, false);
}
}
return null;
}
@Override
public Object visitStatementSleep(StatementSleep statementSleep, Object arg)
throws Exception {
Expression duration = statementSleep.duration;
if (duration!=null)
duration.visit(this, null);
mv.visitInsn(I2L);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Thread", "sleep", "(J)V", false);
return null;
}
@Override
public Object visitLHSIdent(LHSIdent lhsIdent, Object arg)
throws Exception {
Type type = lhsIdent.type;
if(type == Type.INTEGER ||type == Type.BOOLEAN ) {
mv.visitVarInsn(ISTORE, lhsIdent.dec.getSlot());
}
else if (type == Type.FLOAT)
{
mv.visitVarInsn(FSTORE, lhsIdent.dec.getSlot());
}
else if (type == Type.FILE) {
mv.visitVarInsn(ASTORE, lhsIdent.dec.getSlot());
}else if (type == Type.IMAGE)
{
mv.visitMethodInsn(INVOKESTATIC, RuntimeImageSupport.className, "deepCopy", RuntimeImageSupport.deepCopySig,false);
mv.visitVarInsn(ASTORE, lhsIdent.dec.getSlot());
}
return null;
}
@Override
public Object visitExpressionBinary(ExpressionBinary expressionBinary,
Object arg) throws Exception {
// TODO Auto-generated method stub
Expression left=expressionBinary.leftExpression;
Expression right=expressionBinary.rightExpression;
Kind op = expressionBinary.op;
Label start = new Label();
if(op == Kind.OP_OR)
{
right.visit(this, arg);
left.visit(this, arg);
if (left.type==Type.BOOLEAN || left.type==Type.INTEGER)
mv.visitInsn(IOR);
}
else if(op == Kind.OP_AND)
{
right.visit(this, arg);
left.visit(this, arg);
if(left.type==Type.BOOLEAN||left.type==Type.INTEGER)
mv.visitInsn(IAND);
}
else if(op == Kind.OP_PLUS)
{
left.visit(this, arg);
right.visit(this, arg);
if (left.type == Type.INTEGER && right.type == Type.INTEGER)
mv.visitInsn(IADD);
else if (left.type == Type.INTEGER)
{
mv.visitInsn(SWAP);
mv.visitInsn(I2F);
//mv.visitInsn(SWAP);
if (right.type == Type.FLOAT)
mv.visitInsn(FADD);
}
else if (left.type == Type.FLOAT && right.type == Type.FLOAT)
mv.visitInsn(FADD);
else if (left.type == Type.FLOAT)
{
if (right.type == Type.INTEGER)
{
mv.visitInsn(I2F);
mv.visitInsn(FADD);
}
}
}
else if(op == Kind.OP_MINUS)
{
left.visit(this, arg);
right.visit(this, arg);
if (left.type == Type.INTEGER && right.type == Type.INTEGER)
mv.visitInsn(ISUB);
else if (left.type == Type.INTEGER)
{
mv.visitInsn(SWAP);
mv.visitInsn(I2F);
mv.visitInsn(SWAP);
if (right.type == Type.FLOAT)
mv.visitInsn(FSUB);
}
else if (left.type == Type.FLOAT && right.type == Type.FLOAT)
mv.visitInsn(FSUB);
else if (left.type == Type.FLOAT)
{
if (right.type == Type.INTEGER)
{
mv.visitInsn(I2F);
// mv.visitInsn(I2F);
mv.visitInsn(FSUB);
}
}
}
else if(op == Kind.OP_DIV)
{
left.visit(this, arg);
right.visit(this, arg);
if (left.type == Type.INTEGER && right.type == Type.INTEGER)
mv.visitInsn(IDIV);
else if (left.type == Type.INTEGER)
{ mv.visitInsn(SWAP);
mv.visitInsn(I2F);
mv.visitInsn(SWAP);
if (right.type == Type.FLOAT)
mv.visitInsn(FDIV);
}
else if (left.type == Type.FLOAT && right.type == Type.FLOAT)
mv.visitInsn(FDIV);
else if (left.type == Type.FLOAT)
{
if (right.type == Type.INTEGER)
{
//mv.visitInsn(SWAP);
mv.visitInsn(I2F);
//mv.visitInsn(SWAP);
//mv.visitInsn(I2F);
mv.visitInsn(FDIV);
}
}
}
else if(op == Kind.OP_TIMES)
{
right.visit(this, arg);
left.visit(this, arg);
if (left.type == Type.INTEGER && right.type == Type.INTEGER)
mv.visitInsn(IMUL);
else if (left.type == Type.INTEGER)
{
mv.visitInsn(I2F);
if (right.type == Type.FLOAT)
mv.visitInsn(FMUL);
}
else if (left.type == Type.FLOAT && right.type == Type.FLOAT)
mv.visitInsn(FMUL);
else if (left.type == Type.FLOAT)
{
if (right.type == Type.INTEGER)
{
mv.visitInsn(SWAP);
mv.visitInsn(I2F);
mv.visitInsn(SWAP);
// mv.visitInsn(I2F);
mv.visitInsn(FMUL);
}
}
}
else if(op == Kind.OP_POWER)
{
// mv.visitInsn(POP);
//mv.visitInsn(POP);
if (left.type == Type.INTEGER && right.type == Type.INTEGER)
{
left.visit(this, arg);
mv.visitInsn(I2D);
right.visit(this, arg);
mv.visitInsn(I2D);
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "power", RuntimeFunctions.power, false);
mv.visitInsn(D2I);
}
else if (left.type == Type.INTEGER && right.type == Type.FLOAT)
{
left.visit(this, arg);
mv.visitInsn(I2D);
right.visit(this, arg);
mv.visitInsn(F2D);
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "power", RuntimeFunctions.power, false);
mv.visitInsn(D2F);
}
else if (left.type == Type.FLOAT && right.type == Type.FLOAT)
{
left.visit(this, arg);
mv.visitInsn(F2D);
right.visit(this, arg);
mv.visitInsn(F2D);
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "power", RuntimeFunctions.power, false);
mv.visitInsn(D2F);
}
else if(left.type == Type.FLOAT && right.type == Type.INTEGER)
{
left.visit(this, arg);
mv.visitInsn(F2D);
right.visit(this, arg);
mv.visitInsn(I2D);
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "power", RuntimeFunctions.power, false);
mv.visitInsn(D2F);
}
}
else if (expressionBinary.op==Kind.OP_MOD)
{
left.visit(this, arg);
right.visit(this,arg);
if (left.type == Type.INTEGER && right.type == Type.INTEGER)
{
mv.visitInsn(IREM);
}
}
else if (expressionBinary.op==Kind.OP_NEQ )//|| expressionBinary.op==Kind.OP_EQ || expressionBinary.op==Kind.OP_GT ||expressionBinary.op==Kind.OP_GE || expressionBinary.op==Kind.OP_LT || expressionBinary.op==Kind.OP_LE)
{ right.visit(this, arg);
left.visit(this, arg);
if (left.type == right.type){
if (left.type == Type.INTEGER || left.type == Type.BOOLEAN)
mv.visitJumpInsn(IF_ICMPNE, start);
else if(left.type == Type.FLOAT) {
mv.visitInsn(FCMPL);
mv.visitJumpInsn(IFNE, start);
}
mv.visitLdcInsn(false);
}
}
else if (expressionBinary.op==Kind.OP_EQ )//|| expressionBinary.op==Kind.OP_EQ || expressionBinary.op==Kind.OP_GT ||expressionBinary.op==Kind.OP_GE || expressionBinary.op==Kind.OP_LT || expressionBinary.op==Kind.OP_LE)
{
right.visit(this, arg);
left.visit(this, arg);
if (left.type == right.type)
{
if (left.type == Type.INTEGER || left.type == Type.BOOLEAN)
mv.visitJumpInsn(IF_ICMPEQ, start);
else if(left.type == Type.FLOAT) {
mv.visitInsn(FCMPL);
mv.visitJumpInsn(IFEQ,start);
}
mv.visitLdcInsn(false);
}
}
else if(op == Kind.OP_LT)
{ left.visit(this, arg);
right.visit(this, arg);
if (left.type == right.type)
{
if(left.type==Type.INTEGER || left.type == Type.BOOLEAN)
{
mv.visitJumpInsn(IF_ICMPLT, start);
mv.visitLdcInsn(false);
}
else if(left.type == Type.FLOAT)
{
mv.visitInsn(FCMPL);
mv.visitJumpInsn(IFLT, start);
mv.visitLdcInsn(false);
}
}
}
else if(op == Kind.OP_GT)
{
left.visit(this, arg);
right.visit(this, arg);
if (left.type == right.type)
{
if(left.type==Type.INTEGER || left.type == Type.BOOLEAN)
{
mv.visitJumpInsn(IF_ICMPGT, start);
mv.visitLdcInsn(false);
}
else if(left.type == Type.FLOAT)
{
mv.visitInsn(FCMPL);
mv.visitJumpInsn(IFGT,start);
mv.visitLdcInsn(false);
}
}
}
else if(op == Kind.OP_LE)
{
left.visit(this, arg);
right.visit(this, arg);
if (left.type == right.type)
{
if(left.type==Type.INTEGER || left.type == Type.BOOLEAN)
{
mv.visitJumpInsn(IF_ICMPLE, start);
mv.visitLdcInsn(false);
}
else if(left.type == Type.FLOAT)
{
mv.visitInsn(FCMPL);
mv.visitJumpInsn(IFLE, start);
mv.visitLdcInsn(false);
}
}
}
else if(op == Kind.OP_GE)
{
left.visit(this, arg);
right.visit(this, arg);
if (left.type == right.type)
{
if(left.type==Type.INTEGER || left.type == Type.BOOLEAN)
{
mv.visitJumpInsn(IF_ICMPGE, start);
mv.visitLdcInsn(false);
}
else if(left.type == Type.FLOAT)
{
mv.visitInsn(FCMPL);
mv.visitJumpInsn(IFGE,start);
mv.visitLdcInsn(false);
}
}
}
Label end=new Label();
mv.visitJumpInsn(GOTO, end);
mv.visitLabel(start);
mv.visitLdcInsn(true);
mv.visitLabel(end);
return null;
}
@Override
public Object visitExpressionUnary(ExpressionUnary expressionUnary,
Object arg) throws Exception {
Expression ex = expressionUnary.expression;
Kind op = expressionUnary.op;
ex.visit(this, null);
switch (op) {
case OP_PLUS:
if(ex.type == Type.INTEGER || ex.type == Type.FLOAT)
break;
case OP_MINUS:{
if(ex.type == Type.INTEGER)
mv.visitInsn(INEG);
else if (ex.type == Type.FLOAT)
mv.visitInsn(FNEG);
break;}
case OP_EXCLAMATION:
switch (ex.type) {
case BOOLEAN:
mv.visitInsn(ICONST_1);
mv.visitInsn(IXOR);
break;
case INTEGER:
mv.visitLdcInsn(-1);
mv.visitInsn(IXOR);
break;
default:
throw new UnsupportedOperationException();
}
break;
default:
throw new UnsupportedOperationException();
}
return null;
}
@SuppressWarnings("incomplete-switch")
@Override
public Object visitExpressionIdent(ExpressionIdent expressionIdent,
Object arg) throws Exception {
// TODO Auto-generated method stub
Type type = expressionIdent.type;
switch(type)
{
case INTEGER:
mv.visitVarInsn(ILOAD, expressionIdent.dec.getSlot());
break;
case BOOLEAN:
mv.visitVarInsn(ILOAD, expressionIdent.dec.getSlot());
break;
case FLOAT:
mv.visitVarInsn(FLOAD, expressionIdent.dec.getSlot());
break;
case IMAGE:
mv.visitVarInsn(ALOAD, expressionIdent.dec.getSlot());
break;
case FILE:
mv.visitVarInsn(ALOAD, expressionIdent.dec.getSlot());
break;
// default:
// mv.visitVarInsn(ALOAD, expressionIdent.dec.getSlot());
//
// break;
//
}
return null;
}
@Override
public Object visitBooleanLiteral(ExpressionBooleanLiteral expressionBooleanLiteral, Object arg)throws Exception {
mv.visitLdcInsn(expressionBooleanLiteral.value);
return null;
}
@Override
public Object visitExpressionIntegerLiteral(ExpressionIntegerLiteral expressionIntegerLiteral, Object arg)throws Exception {
mv.visitLdcInsn(expressionIntegerLiteral.value);
return null;
}
@Override
public Object visitExpressionFloatLiteral(ExpressionFloatLiteral expressionFloatLiteral, Object arg)throws Exception {
mv.visitLdcInsn(expressionFloatLiteral.value);
return null;
}
@SuppressWarnings("incomplete-switch")
@Override
public Object visitExpressionFunctionAppWithExpressionArg(
ExpressionFunctionAppWithExpressionArg expressionFunctionAppWithExpressionArg,
Object arg) throws Exception {
// TODO Auto-generated method stub
Expression e1 = expressionFunctionAppWithExpressionArg.e;
Kind function=expressionFunctionAppWithExpressionArg.function;
if(e1!=null)
e1.visit(this,arg);
switch (function) {
case KW_log:
mv.visitInsn(F2D);
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "log", RuntimeFunctions.logSig, false);
mv.visitInsn(D2F);
break;
case KW_sin:
mv.visitInsn(F2D);
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "sin", RuntimeFunctions.sinSig, false);
mv.visitInsn(D2F);
break;
case KW_cos:
mv.visitInsn(F2D);
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "cos", RuntimeFunctions.cosSig, false);
mv.visitInsn(D2F);
break;
case KW_abs:{
if (e1.type == Type.FLOAT)
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "abs_ft", RuntimeFunctions.absSig_ft, false);
else if (e1.type == Type.INTEGER)
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "abs_int", RuntimeFunctions.absSig_int, false);
break;}
case KW_atan:
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "atan", RuntimeFunctions.atanSig, false);
break;
case KW_float:
if(e1.type == Type.INTEGER)
mv.visitInsn(I2F);
break;
case KW_int:
if(e1.type == Type.FLOAT)
mv.visitInsn(F2I);
break;
case KW_alpha:
mv.visitMethodInsn(INVOKESTATIC, RuntimePixelOps.className, "getAlpha", RuntimePixelOps.getAlphaSig, false);
break;
case KW_red:
mv.visitMethodInsn(INVOKESTATIC, RuntimePixelOps.className, "getRed", RuntimePixelOps.getRedSig, false);
break;
case KW_blue:
mv.visitMethodInsn(INVOKESTATIC, RuntimePixelOps.className, "getBlue", RuntimePixelOps.getBlueSig, false);
break;
case KW_green:
mv.visitMethodInsn(INVOKESTATIC, RuntimePixelOps.className, "getGreen", RuntimePixelOps.getGreenSig, false);
break;
case KW_width:
//mv.visitVarInsn(ALOAD, e1.dec.getSlot());
mv.visitMethodInsn(INVOKESTATIC, RuntimeImageSupport.className, "getWidth", RuntimeImageSupport.getWidthSig, false);
break;
case KW_height:
// mv.visitVarInsn(ALOAD, e1.dec.getSlot());
mv.visitMethodInsn(INVOKESTATIC, RuntimeImageSupport.className, "getHeight", RuntimeImageSupport.getHeightSig, false);
break;
}
return null;
}
@Override
public Object visitExpressionPredefinedName(
ExpressionPredefinedName expressionPredefinedName, Object arg)
throws Exception {
// TODO Auto-generated method stub
Kind kind=expressionPredefinedName.name;
if (kind == Kind.KW_Z)
mv.visitLdcInsn(Z);
else if (kind == Kind.KW_default_height) {
mv.visitLdcInsn(defaultHeight);
}else if (kind == Kind.KW_default_width){
mv.visitLdcInsn(defaultWidth);
}
return null;
}
/*********************HW6******************************/
@SuppressWarnings("incomplete-switch")
@Override
public Object visitExpressionFunctionAppWithPixel(
ExpressionFunctionAppWithPixel expressionFunctionAppWithPixel,
Object arg) throws Exception {
// TODO Auto-generated method stub
//hw6
Expression ex1 = expressionFunctionAppWithPixel.e0;
Expression ex2 = expressionFunctionAppWithPixel.e1;
Kind kind = expressionFunctionAppWithPixel.name;
switch (kind) {
case KW_cart_x : {
ex1.visit(this, arg);
mv.visitInsn(F2D);
ex2.visit(this, arg);
mv.visitInsn(F2D);
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "cart_x", RuntimeFunctions.cart_xSig, false);
// mv.visitMethodInsn(INVOKESTATIC, "java/lang/Math", "cos", "(D)D", false);
// mv.visitInsn(DMUL);
mv.visitInsn(D2I);
break;
}
case KW_cart_y :{
ex1.visit(this, arg);
mv.visitInsn(F2D);
ex2.visit(this, arg);
mv.visitInsn(F2D);
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "cart_y", RuntimeFunctions.cart_ySig, false);
// mv.visitMethodInsn(INVOKESTATIC, "java/lang/Math", "sin", "(D)D", false);
// mv.visitInsn(DMUL);
mv.visitInsn(D2I);
break;
}
case KW_polar_r:{
ex1.visit(this, arg);
mv.visitInsn(I2D);
ex2.visit(this, arg);
mv.visitInsn(I2D);
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "polar_r", RuntimeFunctions.polar_rSig, false);
mv.visitInsn(D2F);
break;
}
case KW_polar_a:{
ex1.visit(this, arg);
mv.visitInsn(I2D);
ex2.visit(this, arg);
mv.visitInsn(I2D);
mv.visitMethodInsn(INVOKESTATIC, RuntimeFunctions.className, "polar_a", RuntimeFunctions.polar_aSig, false);
mv.visitInsn(D2F);
break;
}
}
return null;
}
@Override
public Object visitLHSPixel(LHSPixel lhsPixel, Object arg)
throws Exception {
// TODO Auto-generated method stub
// hw6
mv.visitVarInsn(ALOAD, lhsPixel.dec.getSlot());
lhsPixel.pixelSelector.visit(this, arg);
mv.visitMethodInsn(INVOKESTATIC, RuntimeImageSupport.className, "setPixel", RuntimeImageSupport.setPixelSig, false);