mozilla
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pjs
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Added store/load function to shortcut add(ByteCode.x, i)

This commit is contained in:
igor%mir2.org 2003-08-18 11:49:39 +00:00
Родитель 6e01655def
Коммит aa709dd3ba
1 изменённых файлов: 212 добавлений и 92 удалений
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304
js/rhino/src/org/mozilla/classfile/ClassFileWriter.java
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@ -583,98 +583,6 @@ public class ClassFileWriter {
add(ByteCode.LDC, itsConstantPool.addConstant(k));
}
/**
* Generate code to load the given integer on stack.
*
* @param k the constant
*/
public void addPush(int k)
{
if ((byte)k == k) {
if (k == -1) {
add(ByteCode.ICONST_M1);
} else if (0 <= k && k <= 5) {
add((byte)(ByteCode.ICONST_0 + k));
} else {
add(ByteCode.BIPUSH, (byte)k);
}
} else if ((short)k == k) {
add(ByteCode.SIPUSH, (short)k);
} else {
addLoadConstant(k);
}
}
/**
* Generate code to load the given double on stack.
*
* @param k the constant
*/
public void addPush(double k)
{
if (k == 0.0 && 1.0 / k >= 0.0) {
// Positive zero
add(ByteCode.DCONST_0);
} else if (k == 1.0) {
add(ByteCode.DCONST_1);
} else {
addLoadConstant(k);
}
}
/**
* Generate the code to leave on stack the given string even if the
* string encoding exeeds the class file limit for single string constant
*
* @param k the constant
*/
public void addPush(String k) {
int length = k.length();
int limit = itsConstantPool.getUtfEncodingLimit(k, 0, length);
if (limit == length) {
addLoadConstant(k);
return;
}
// Split string into picies fitting the UTF limit and generate code for
// StringBuffer sb = new StringBuffer(length);
// sb.append(loadConstant(piece_1));
// ...
// sb.append(loadConstant(piece_N));
// sb.toString();
final String SB = "java/lang/StringBuffer";
add(ByteCode.NEW, SB);
add(ByteCode.DUP);
addPush(length);
addInvoke(ByteCode.INVOKESPECIAL, SB, "<init>", "(I)V");
int cursor = 0;
for (;;) {
add(ByteCode.DUP);
String s = k.substring(cursor, limit);
addLoadConstant(s);
addInvoke(ByteCode.INVOKEVIRTUAL, SB, "append",
"(Ljava/lang/String;)Ljava/lang/StringBuffer;");
add(ByteCode.POP);
if (limit == length) {
break;
}
cursor = limit;
limit = itsConstantPool.getUtfEncodingLimit(k, limit, length);
}
addInvoke(ByteCode.INVOKEVIRTUAL, SB, "toString",
"()Ljava/lang/String;");
}
/**
* Check if k fits limit on string constant size imposed by class file
* format.
*
* @param k the string constant
*/
public boolean isUnderStringSizeLimit(String k)
{
return itsConstantPool.isUnderUtfEncodingLimit(k);
}
/**
* Add the given two-operand bytecode to the current method.
*
@ -863,6 +771,218 @@ public class ClassFileWriter {
}
}
/**
* Generate code to load the given integer on stack.
*
* @param k the constant
*/
public void addPush(int k)
{
if ((byte)k == k) {
if (k == -1) {
add(ByteCode.ICONST_M1);
} else if (0 <= k && k <= 5) {
add((byte)(ByteCode.ICONST_0 + k));
} else {
add(ByteCode.BIPUSH, (byte)k);
}
} else if ((short)k == k) {
add(ByteCode.SIPUSH, (short)k);
} else {
addLoadConstant(k);
}
}
/**
* Generate code to load the given double on stack.
*
* @param k the constant
*/
public void addPush(double k)
{
if (k == 0.0 && 1.0 / k >= 0.0) {
// Positive zero
add(ByteCode.DCONST_0);
} else if (k == 1.0) {
add(ByteCode.DCONST_1);
} else {
addLoadConstant(k);
}
}
/**
* Generate the code to leave on stack the given string even if the
* string encoding exeeds the class file limit for single string constant
*
* @param k the constant
*/
public void addPush(String k) {
int length = k.length();
int limit = itsConstantPool.getUtfEncodingLimit(k, 0, length);
if (limit == length) {
addLoadConstant(k);
return;
}
// Split string into picies fitting the UTF limit and generate code for
// StringBuffer sb = new StringBuffer(length);
// sb.append(loadConstant(piece_1));
// ...
// sb.append(loadConstant(piece_N));
// sb.toString();
final String SB = "java/lang/StringBuffer";
add(ByteCode.NEW, SB);
add(ByteCode.DUP);
addPush(length);
addInvoke(ByteCode.INVOKESPECIAL, SB, "<init>", "(I)V");
int cursor = 0;
for (;;) {
add(ByteCode.DUP);
String s = k.substring(cursor, limit);
addLoadConstant(s);
addInvoke(ByteCode.INVOKEVIRTUAL, SB, "append",
"(Ljava/lang/String;)Ljava/lang/StringBuffer;");
add(ByteCode.POP);
if (limit == length) {
break;
}
cursor = limit;
limit = itsConstantPool.getUtfEncodingLimit(k, limit, length);
}
addInvoke(ByteCode.INVOKEVIRTUAL, SB, "toString",
"()Ljava/lang/String;");
}
/**
* Check if k fits limit on string constant size imposed by class file
* format.
*
* @param k the string constant
*/
public boolean isUnderStringSizeLimit(String k)
{
return itsConstantPool.isUnderUtfEncodingLimit(k);
}
/**
* Store integer from stack top into the given local.
*
* @param local number of local register
*/
public void istore(int local)
{
xop(ByteCode.ISTORE_0, ByteCode.ISTORE, local);
}
/**
* Store long from stack top into the given local.
*
* @param local number of local register
*/
public void lstore(int local)
{
xop(ByteCode.LSTORE_0, ByteCode.LSTORE, local);
}
/**
* Store float from stack top into the given local.
*
* @param local number of local register
*/
public void fstore(int local)
{
xop(ByteCode.FSTORE_0, ByteCode.FSTORE, local);
}
/**
* Store double from stack top into the given local.
*
* @param local number of local register
*/
public void dstore(int local)
{
xop(ByteCode.DSTORE_0, ByteCode.DSTORE, local);
}
/**
* Store object from stack top into the given local.
*
* @param local number of local register
*/
public void astore(int local)
{
xop(ByteCode.ASTORE_0, ByteCode.ASTORE, local);
}
/**
* Load integer from the given local into stack.
*
* @param local number of local register
*/
public void iload(int local)
{
xop(ByteCode.ILOAD_0, ByteCode.ILOAD, local);
}
/**
* Load long from the given local into stack.
*
* @param local number of local register
*/
public void lload(int local)
{
xop(ByteCode.LLOAD_0, ByteCode.LLOAD, local);
}
/**
* Load float from the given local into stack.
*
* @param local number of local register
*/
public void fload(int local)
{
xop(ByteCode.FLOAD_0, ByteCode.FLOAD, local);
}
/**
* Load double from the given local into stack.
*
* @param local number of local register
*/
public void dload(int local)
{
xop(ByteCode.DLOAD_0, ByteCode.DLOAD, local);
}
/**
* Load object from the given local into stack.
*
* @param local number of local register
*/
public void aload(int local)
{
xop(ByteCode.ALOAD_0, ByteCode.ALOAD, local);
}
private void xop(byte shortOp, byte op, int local)
{
switch (local) {
case 0:
add(shortOp);
break;
case 1:
add((byte)(shortOp + 1));
break;
case 2:
add((byte)(shortOp + 2));
break;
case 3:
add((byte)(shortOp + 3));
break;
default:
add(op, local);
}
}
public int acquireLabel() {
return itsLabels.acquireLabel() | 0x80000000;
}