зеркало из https://github.com/mozilla/gecko-dev.git
Added store/load function to shortcut add(ByteCode.x, i)
This commit is contained in:
igor%mir2.org
Родитель
e2a99c82b4
Коммит
5f6517906c
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@ -583,98 +583,6 @@ public class ClassFileWriter {
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add(ByteCode.LDC, itsConstantPool.addConstant(k));
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}
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/**
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* Generate code to load the given integer on stack.
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*
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* @param k the constant
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*/
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public void addPush(int k)
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{
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if ((byte)k == k) {
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if (k == -1) {
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add(ByteCode.ICONST_M1);
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} else if (0 <= k && k <= 5) {
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add((byte)(ByteCode.ICONST_0 + k));
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} else {
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add(ByteCode.BIPUSH, (byte)k);
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}
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} else if ((short)k == k) {
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add(ByteCode.SIPUSH, (short)k);
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} else {
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addLoadConstant(k);
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}
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}
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/**
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* Generate code to load the given double on stack.
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*
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* @param k the constant
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*/
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public void addPush(double k)
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{
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if (k == 0.0 && 1.0 / k >= 0.0) {
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// Positive zero
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add(ByteCode.DCONST_0);
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} else if (k == 1.0) {
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add(ByteCode.DCONST_1);
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} else {
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addLoadConstant(k);
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}
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}
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/**
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* Generate the code to leave on stack the given string even if the
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* string encoding exeeds the class file limit for single string constant
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*
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* @param k the constant
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*/
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public void addPush(String k) {
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int length = k.length();
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int limit = itsConstantPool.getUtfEncodingLimit(k, 0, length);
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if (limit == length) {
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addLoadConstant(k);
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return;
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}
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// Split string into picies fitting the UTF limit and generate code for
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// StringBuffer sb = new StringBuffer(length);
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// sb.append(loadConstant(piece_1));
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// ...
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// sb.append(loadConstant(piece_N));
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// sb.toString();
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final String SB = "java/lang/StringBuffer";
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add(ByteCode.NEW, SB);
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add(ByteCode.DUP);
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addPush(length);
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addInvoke(ByteCode.INVOKESPECIAL, SB, "<init>", "(I)V");
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int cursor = 0;
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for (;;) {
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add(ByteCode.DUP);
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String s = k.substring(cursor, limit);
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addLoadConstant(s);
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addInvoke(ByteCode.INVOKEVIRTUAL, SB, "append",
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"(Ljava/lang/String;)Ljava/lang/StringBuffer;");
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add(ByteCode.POP);
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if (limit == length) {
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break;
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}
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cursor = limit;
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limit = itsConstantPool.getUtfEncodingLimit(k, limit, length);
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}
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addInvoke(ByteCode.INVOKEVIRTUAL, SB, "toString",
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"()Ljava/lang/String;");
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}
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/**
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* Check if k fits limit on string constant size imposed by class file
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* format.
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*
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* @param k the string constant
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*/
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public boolean isUnderStringSizeLimit(String k)
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{
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return itsConstantPool.isUnderUtfEncodingLimit(k);
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}
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/**
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* Add the given two-operand bytecode to the current method.
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*
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@ -863,6 +771,218 @@ public class ClassFileWriter {
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}
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}
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/**
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* Generate code to load the given integer on stack.
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*
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* @param k the constant
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*/
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public void addPush(int k)
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{
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if ((byte)k == k) {
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if (k == -1) {
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add(ByteCode.ICONST_M1);
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} else if (0 <= k && k <= 5) {
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add((byte)(ByteCode.ICONST_0 + k));
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} else {
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add(ByteCode.BIPUSH, (byte)k);
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}
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} else if ((short)k == k) {
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add(ByteCode.SIPUSH, (short)k);
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} else {
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addLoadConstant(k);
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}
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}
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/**
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* Generate code to load the given double on stack.
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*
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* @param k the constant
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*/
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public void addPush(double k)
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{
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if (k == 0.0 && 1.0 / k >= 0.0) {
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// Positive zero
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add(ByteCode.DCONST_0);
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} else if (k == 1.0) {
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add(ByteCode.DCONST_1);
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} else {
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addLoadConstant(k);
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}
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}
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/**
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* Generate the code to leave on stack the given string even if the
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* string encoding exeeds the class file limit for single string constant
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*
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* @param k the constant
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*/
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public void addPush(String k) {
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int length = k.length();
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int limit = itsConstantPool.getUtfEncodingLimit(k, 0, length);
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if (limit == length) {
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addLoadConstant(k);
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return;
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}
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// Split string into picies fitting the UTF limit and generate code for
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// StringBuffer sb = new StringBuffer(length);
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// sb.append(loadConstant(piece_1));
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// ...
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// sb.append(loadConstant(piece_N));
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// sb.toString();
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final String SB = "java/lang/StringBuffer";
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add(ByteCode.NEW, SB);
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add(ByteCode.DUP);
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addPush(length);
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addInvoke(ByteCode.INVOKESPECIAL, SB, "<init>", "(I)V");
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int cursor = 0;
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for (;;) {
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add(ByteCode.DUP);
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String s = k.substring(cursor, limit);
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addLoadConstant(s);
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addInvoke(ByteCode.INVOKEVIRTUAL, SB, "append",
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"(Ljava/lang/String;)Ljava/lang/StringBuffer;");
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add(ByteCode.POP);
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if (limit == length) {
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break;
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}
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cursor = limit;
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limit = itsConstantPool.getUtfEncodingLimit(k, limit, length);
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}
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addInvoke(ByteCode.INVOKEVIRTUAL, SB, "toString",
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"()Ljava/lang/String;");
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}
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/**
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* Check if k fits limit on string constant size imposed by class file
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* format.
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*
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* @param k the string constant
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*/
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public boolean isUnderStringSizeLimit(String k)
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{
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return itsConstantPool.isUnderUtfEncodingLimit(k);
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}
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/**
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* Store integer from stack top into the given local.
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*
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* @param local number of local register
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*/
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public void istore(int local)
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{
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xop(ByteCode.ISTORE_0, ByteCode.ISTORE, local);
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}
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/**
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* Store long from stack top into the given local.
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*
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* @param local number of local register
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*/
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public void lstore(int local)
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{
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xop(ByteCode.LSTORE_0, ByteCode.LSTORE, local);
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}
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/**
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* Store float from stack top into the given local.
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*
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* @param local number of local register
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*/
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public void fstore(int local)
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{
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xop(ByteCode.FSTORE_0, ByteCode.FSTORE, local);
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}
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/**
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* Store double from stack top into the given local.
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*
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* @param local number of local register
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*/
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public void dstore(int local)
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{
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xop(ByteCode.DSTORE_0, ByteCode.DSTORE, local);
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}
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/**
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* Store object from stack top into the given local.
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*
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* @param local number of local register
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*/
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public void astore(int local)
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{
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xop(ByteCode.ASTORE_0, ByteCode.ASTORE, local);
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}
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/**
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* Load integer from the given local into stack.
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*
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* @param local number of local register
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*/
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public void iload(int local)
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{
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xop(ByteCode.ILOAD_0, ByteCode.ILOAD, local);
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}
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/**
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* Load long from the given local into stack.
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*
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* @param local number of local register
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*/
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public void lload(int local)
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{
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xop(ByteCode.LLOAD_0, ByteCode.LLOAD, local);
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}
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/**
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* Load float from the given local into stack.
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*
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* @param local number of local register
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*/
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public void fload(int local)
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{
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xop(ByteCode.FLOAD_0, ByteCode.FLOAD, local);
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}
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/**
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* Load double from the given local into stack.
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*
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* @param local number of local register
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*/
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public void dload(int local)
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{
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xop(ByteCode.DLOAD_0, ByteCode.DLOAD, local);
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}
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/**
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* Load object from the given local into stack.
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*
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* @param local number of local register
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*/
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public void aload(int local)
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{
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xop(ByteCode.ALOAD_0, ByteCode.ALOAD, local);
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}
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private void xop(byte shortOp, byte op, int local)
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{
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switch (local) {
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case 0:
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add(shortOp);
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break;
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case 1:
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add((byte)(shortOp + 1));
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break;
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case 2:
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add((byte)(shortOp + 2));
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break;
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case 3:
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add((byte)(shortOp + 3));
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break;
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default:
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add(op, local);
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}
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}
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public int acquireLabel() {
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return itsLabels.acquireLabel() | 0x80000000;
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}
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