Inside the Java 2 Virtual Machine
| | |
| | |
| 1997 The McGraw-Hill Companies, Inc. All rights reserved. Any use of this Beta Book is subject to the rules stated in the Terms of Use. | |
Opcode Mnemonic by Function Group
Stack Operations (Chapter 10)
Instructions that push a constant onto the stack
| aconst_null | Push null object reference |
| iconst_m1 | Push int constant -1 |
| iconst_0 | Push int constant 0 |
| iconst_1 | Push int constant 1 |
| iconst_2 | Push int constant 2 |
| iconst_3 | Push int constant 3 |
| iconst_4 | Push int constant 4 |
| iconst_5 | Push int constant 5 |
| lconst_0 | Push long constant 0 |
| lconst_1 | Push long constant 1 |
| fconst_0 | Push float constant 0.0 |
| fconst_1 | Push float constant 1.0 |
| fconst_2 | Push float constant 2.0 |
| dconst_0 | Push double constant 0.0 |
| dconst_1 | Push double constant 1.0 |
| bipush | Push 8-bit signed integer |
| sipush | Push 16-bit signed integer |
| ldc | Push item from constant pool |
| ldcw | Push item from constant pool (wide index) |
| ldc2_w | Push long or double from constant pool (wide index) |
Instructions that load a local variable onto the stack
| iload | Load int from local variable |
| lload | Load long from local variable |
| fload | Load float from local variable |
| dload | Load double from local variable |
| aload | Load reference from local variable |
| iload_0 | Load int from local variable 0 |
| iload_1 | Load int from local variable 1 |
| iload_2 | Load int from local variable 2 |
| iload_3 | Load int from local variable 3 |
| lload_0 | Load long from local variable 0 |
| lload_1 | Load long from local variable 1 |
| lload_2 | Load long from local variable 2 |
| lload_3 | Load long from local variable 3 |
| fload_0 | Load float from local variable 0 |
| fload_1 | Load float from local variable 1 |
| fload_2 | Load float from local variable 2 |
| fload_3 | Load float from local variable 3 |
| dload_0 | Load double from local variable 0 |
| dload_1 | Load double from local variable 1 |
| dload_2 | Load double from local variable 2 |
| dload_3 | Load double from local variable 3 |
| aload_0 | Load reference from local variable 0 |
| aload_1 | Load reference from local variable 1 |
| aload_2 | Load reference from local variable 2 |
| aload_3 | Load reference from local variable 3 |
| iaload | Load int from array |
| laload | Load long from array |
| faload | Load float from array |
| daload | Load double from array |
| aaload | Load reference from array |
| baload | Load byte or boolean from array |
| caload | Load char from array |
| saload | Load short from array |
Instructions that store a value from the stack into a local variable
| istore | Store int into local variable |
| lstore | Store long into local variable |
| fstore | Store float into local variable |
| dstore | Store double into local variable |
| astore | Store reference or returnAddress into local variable |
| istore_0 | Store int into local variable 0 |
| istore_1 | Store int into local variable 1 |
| istore_2 | Store int into local variable 2 |
| istore_3 | Store int into local variable 3 |
| lstore_0 | Store long into local variable 0 |
| lstore_1 | Store long into local variable 1 |
| lstore_2 | Store long into local variable 2 |
| lstore_3 | Store long into local variable 3 |
| fstore_0 | Store float into local variable 0 |
| fstore_1 | Store float into local variable 1 |
| fstore_2 | Store float into local variable 2 |
| fstore_3 | Store float into local variable 3 |
| dstore_0 | Store double into local variable 0 |
| dstore_1 | Store double into local variable 1 |
| dstore_2 | Store double into local variable 2 |
| dstore_3 | Store double into local variable 3 |
| astore_0 | Store reference or returnAddress into local variable 0 |
| astore_1 | Store reference or returnAddress into local variable 1 |
| astore_2 | Store reference or returnAddress into local variable 2 |
| astore_3 | Store reference or returnAddress into local variable 3 |
| iastore | Store into int array |
| lastore | Store into long array |
| fastore | Store into float array |
| dastore | Store into double array |
| aastore | Store into reference array |
| bastore | Store into byte or boolean array |
| castore | Store into char array |
| sastore | Store into short array |
The wide instruction
| wide | Extend a local variable index with additional bytes |
Generic (typeless) stack operations
| nop | Do nothing |
| pop | Pop top stack word |
| pop2 | Pop top two stack words |
| dup | Duplicate top stack word |
| dup_x1 | Duplicate top stack word and put two down |
| dup_x2 | Duplicate top stack word and put three down |
| dup2 | Duplicate top two stack words |
| dup2_x1 | Duplicate top two stack words and put two down |
| dup2_x2 | Duplicate top two stack words and put three down |
| swap | Swap top two stack words |
Type Conversion (Chapter 11)
| i2l | Convert int to long |
| i2f | Convert int to float |
| i2d | Convert int to double |
| l2i | Convert long to int |
| l2f | Convert long to float |
| l2d | Convert long to double |
| f2i | Convert float to int |
| f2l | Convert float to long |
| f2d | Convert float to double |
| d2i | Convert double to int |
| d2l | Convert double to long |
| d2f | Convert double to float |
| i2b | Convert int to byte |
| i2c | Convert int to char |
| i2s | Convert int to short |
Integer Arithmetic (Chapter 12)
| iadd | Add int s |
| ladd | Add long s |
| isub | Subtract int s |
| lsub | Subtract long s |
| imul | Multiply int s |
| lmul | Multiply long s |
| idiv | Divide int s |
| ldiv | Divide long s |
| irem | Calculate remainder of division of int s |
| lrem | Calculate remainder of division of long s |
| ineg | Negate int |
| lneg | Negate long |
| iinc | Increment int local variable by constant |
Logic (Chapter 13)
Shift operations
| ishl | Perform left shift on int |
| lshl | Perform left shift on long |
| ishr | Perform arithmetic right shift on int |
| lshr | Perform arithmetic right shift on long |
| iushr | Perform logical right shift on int |
| lushr | Perform logical right shift on long |
Bitwise boolean operations
| iand | Perform boolean AND on int s |
| land | Perform boolean AND on long s |
| ior | Perform boolean OR on int s |
| lor | Perform boolean OR on long s |
| ixor | Perform boolean XOR on int s |
| lxor | Perform boolean XOR on long s |
Floating Point Arithmetic (Chapter 14)
| fadd | Add float s |
| dadd | Add double s |
| fsub | Subtract float s |
| dsub | Subtract double s |
| fmul | Multiply float s |
| dmul | Multiply double s |
| fdiv | Divide float s |
| ddiv | Divide double s |
| frem | Calculate remainder of division of float s |
| drem | Calculate remainder of division of double s |
| fneg | Negate float |
| dneg | Negate double |
Objects and Arrays (Chapter 15)
Instructions that deal with objects
| new | Create a new object |
| checkcast | Make sure object is of a given type |
| getfield | Fetch field from object |
| putfield | Set field in object |
| getstatic | Fetch static field from class |
| putstatic | Set static field in class |
| instanceof | Determine if an object is of a given type |
Instructions that deal with arrays
| newarray | Allocate new array of primitive type components |
| anewarray | Allocate new array of reference type components |
| arraylength | Get length of an array |
| multianewarray | Allocate a new multi-dimensional array |
Control Flow (Chapter 16)
Conditional branch instructions
| ifeq | Branch if equal to 0 |
| ifne | Branch if not equal to 0 |
| iflt | Branch if less than 0 |
| ifge | Branch if greater than or equal to 0 |
| ifgt | Branch if greater than 0 |
| ifle | Branch if less than or equal to 0 |
| if_icmpeq | Branch if int s equal |
| if_icmpne | Branch if int s not equal |
| if_icmplt | Branch if int less than other int |
| if_icmpge | Branch if int greater than or equal to other int |
| if_icmpgt | Branch if int greater than other int |
| if_icmple | Branch if int less than or equal to other int |
| ifnull | Branch if null |
| ifnonnull | Branch if not null |
| if_acmpeq | Branch if object references are equal |
| if_acmpne | Branch if object references not equal |
Comparison instructions
| lcmp | Compare long s |
| fcmpl | Compare float s (-1 on NaN) |
| fcmpg | Compare float s (1 on NaN) |
| dcmpl | Compare double s (-1 on NaN) |
| dcmpg | Compare double s (1 on NaN) |
Unconditional branch instructions
| goto | Branch always |
| goto_w | Branch always (wide index) |
Table jumping instructions
| tableswitch | Access jump table by index and jump |
| lookupswitch | Access jump table by key match and jump |
Exceptions (Chapter 17)
| athrow | Throw exception or error |
Finally Clauses (Chapter 18)
| jsr | Jump to subroutine |
| jsr_w | Jump to subroutine (wide index) |
| ret | Return from subroutine |
Method Invocation and Return (Chapter 19)
Method invocation instructions
| invokevirtual | Invoke instance method, dispatch based on run-time type |
| invokespecial | Invoke instance method, dispatching based on compile-time type |
| invokestatic | Invoke a class (static) method |
| invokeinterface | Invoke interface method |
Method return instructions
| ireturn | Return int from method |
| lreturn | Return long from method |
| freturn | Return float from method |
| dreturn | Return double from method |
| areturn | Return reference from method |
| return | Return ( void ) from method |
Thread Synchronization (Chapter 20)
| monitorenter | Enter and acquire object monitor |
| monitorexit | Release and exit object monitor |
| | |
| | |
COMPUTING MCGRAW-HILL Beta Books Contact Us Order Information Online Catalog
Computing McGraw-Hill is an imprint of the McGraw-Hill Professional Book Group.
Copyright 1997 The McGraw-Hill Companies. All rights reserved. Any use is subject to the Terms of Use; the corporation also has a comprehensive Privacy Policy governing information we may collect from our customers.
Категории