fixed bug #315942
diff --git a/src/org/objectweb/asm/xml/asm-xml.dtd b/src/org/objectweb/asm/xml/asm-xml.dtd
index 4e637bf..d8fc2d2 100644
--- a/src/org/objectweb/asm/xml/asm-xml.dtd
+++ b/src/org/objectweb/asm/xml/asm-xml.dtd
@@ -84,7 +84,7 @@
<!--
code element contains bytecode instructions and definitions for labels, line numbers, try/catch and max
-->
-<!ELEMENT code (( AALOAD | AASTORE | ACONST_NULL | ALOAD | ANEWARRAY | ARETURN | ARRAYLENGTH | ASTORE | ATHROW | BALOAD | BASTORE | BIPUSH | CALOAD | CASTORE | CHECKCAST | D2F | D2I | D2L | DADD | DALOAD | DASTORE | DCMPG | DCMPL | DCONST_0 | DCONST_1 | DDIV | DLOAD | DMUL | DNEG | DREM | DRETURN | DSTORE | DSUB | DUP | DUP2 | DUP2_X1 | DUP2_X2 | DUP_X1 | DUP_X2 | F2D | F2I | F2L | FADD | FALOAD | FASTORE | FCMPG | FCMPL | FCONST_0 | FCONST_1 | FCONST_2 | FDIV | FLOAD | FMUL | FNEG | FRETURN | FSTORE | FSUB | GETFIELD | GETSTATIC | GOTO | I2B | I2C | I2D | I2F | I2L | I2S | IADD | IALOAD | IAND | IASTORE | ICONST_0 | ICONST_1 | ICONST_2 | ICONST_3 | ICONST_4 | ICONST_5 | ICONST_M1 | IDIV | IFEQ | IFGE | IFGT | IFLE | IFLT | IFNE | IFNONNULL | IFNULL | IF_ACMPEQ | IF_ACMPNE | IF_ICMPEQ | IF_ICMPGE | IF_ICMPGT | IF_ICMPLE | IF_ICMPLT | IF_ICMPNE | IINC | ILOAD | IMUL | INEG | INSTANCEOF | INVOKEINTERFACE | INVOKESPECIAL | INVOKESTATIC | INVOKEVIRTUAL | IOR | IREM | IRETURN | ISHL | ISHR | ISTORE | ISUB | IUSHR | IXOR | JSR | L2D | L2F | L2I | LADD | LALOAD | LAND | LASTORE | LCMP | LCONST_0 | LCONST_1 | LDC | LDIV | LLOAD | LMUL | LNEG | LOOKUPSWITCH | LOR | LREM | LRETURN | LSHL | LSHR | LSTORE | LSUB | LUSHR | LXOR | MONITORENTER | MONITOREXIT | MULTIANEWARRAY | NEW | NEWARRAY | NOP | POP | POP2 | PUTFIELD | PUTSTATIC | RET | RETURN | SALOAD | SASTORE | SIPUSH | TABLESWITCH | Label | LineNumber | TryCatch )*, Max)>
+<!ELEMENT code (( AALOAD | AASTORE | ACONST_NULL | ALOAD | ANEWARRAY | ARETURN | ARRAYLENGTH | ASTORE | ATHROW | BALOAD | BASTORE | BIPUSH | CALOAD | CASTORE | CHECKCAST | D2F | D2I | D2L | DADD | DALOAD | DASTORE | DCMPG | DCMPL | DCONST_0 | DCONST_1 | DDIV | DLOAD | DMUL | DNEG | DREM | DRETURN | DSTORE | DSUB | DUP | DUP2 | DUP2_X1 | DUP2_X2 | DUP_X1 | DUP_X2 | SWAP | F2D | F2I | F2L | FADD | FALOAD | FASTORE | FCMPG | FCMPL | FCONST_0 | FCONST_1 | FCONST_2 | FDIV | FLOAD | FMUL | FNEG | FRETURN | FSTORE | FSUB | GETFIELD | GETSTATIC | GOTO | I2B | I2C | I2D | I2F | I2L | I2S | IADD | IALOAD | IAND | IASTORE | ICONST_0 | ICONST_1 | ICONST_2 | ICONST_3 | ICONST_4 | ICONST_5 | ICONST_M1 | IDIV | IFEQ | IFGE | IFGT | IFLE | IFLT | IFNE | IFNONNULL | IFNULL | IF_ACMPEQ | IF_ACMPNE | IF_ICMPEQ | IF_ICMPGE | IF_ICMPGT | IF_ICMPLE | IF_ICMPLT | IF_ICMPNE | IINC | ILOAD | IMUL | INEG | INSTANCEOF | INVOKEINTERFACE | INVOKESPECIAL | INVOKESTATIC | INVOKEVIRTUAL | IOR | IREM | IRETURN | ISHL | ISHR | ISTORE | ISUB | IUSHR | IXOR | JSR | L2D | L2F | L2I | LADD | LALOAD | LAND | LASTORE | LCMP | LCONST_0 | LCONST_1 | LDC | LDIV | LLOAD | LMUL | LNEG | LOOKUPSWITCH | LOR | LREM | LRETURN | LSHL | LSHR | LSTORE | LSUB | LUSHR | LXOR | MONITORENTER | MONITOREXIT | MULTIANEWARRAY | NEW | NEWARRAY | NOP | POP | POP2 | PUTFIELD | PUTSTATIC | RET | RETURN | SALOAD | SASTORE | SIPUSH | TABLESWITCH | Label | LineNumber | TryCatch )*, Max)>
<!ELEMENT Label EMPTY>
<!ATTLIST Label name CDATA #REQUIRED>
@@ -149,6 +149,7 @@
<!ELEMENT DUP2_X2 EMPTY>
<!ELEMENT DUP_X1 EMPTY>
<!ELEMENT DUP_X2 EMPTY>
+<!ELEMENT SWAP EMPTY>
<!ELEMENT F2D EMPTY>
<!ELEMENT F2I EMPTY>
<!ELEMENT F2L EMPTY>
