List of Java bytecode instructions: Difference between revisions

Revision as of 22:01, 21 May 2020

Revision as of 17:09, 23 June 2020

Line 75:

|2: indexbyte1, indexbyte2

|count → arrayref

|create a new array of references of length ''count'' and component type identified by the class reference ''index'' ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}}) in the constant pool

|-

|areturn

Line 180:

|2: indexbyte1, indexbyte2

|objectref → objectref

|checks whether an ''objectref'' is of a certain type, the class reference of which is in the constant pool at ''index'' ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|d2f

Line 600:

|2: indexbyte1, indexbyte2

|objectref → value

|get a field ''value'' of an object ''objectref'', where the field is identified by field reference in the constant pool ''index'' ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|getstatic

Line 607:

|2: indexbyte1, indexbyte2

|→ value

|get a static field ''value'' of a class, where the field is identified by field reference in the constant pool ''index'' ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|goto

Line 614:

|2: branchbyte1, branchbyte2

|[no change]

|goes to another instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|goto_w

Line 621:

|4: branchbyte1, branchbyte2, branchbyte3, branchbyte4

|[no change]

|goes to another instruction at ''branchoffset'' (signed int constructed from unsigned bytes {{mono|branchbyte1 << 24 +{{pipe}} branchbyte2 << 16 +{{pipe}} branchbyte3 << 8 +{{pipe}} branchbyte4}})

|-

|i2b

Line 754:

|2: branchbyte1, branchbyte2

|value1, value2 →

|if references are equal, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|if_acmpne

Line 761:

|2: branchbyte1, branchbyte2

|value1, value2 →

|if references are not equal, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|if_icmpeq

Line 768:

|2: branchbyte1, branchbyte2

|value1, value2 →

|if ints are equal, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|if_icmpge

Line 775:

|2: branchbyte1, branchbyte2

|value1, value2 →

|if ''value1'' is greater than or equal to ''value2'', branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|if_icmpgt

Line 782:

|2: branchbyte1, branchbyte2

|value1, value2 →

|if ''value1'' is greater than ''value2'', branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|if_icmple

Line 789:

|2: branchbyte1, branchbyte2

|value1, value2 →

|if ''value1'' is less than or equal to ''value2'', branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|if_icmplt

Line 796:

|2: branchbyte1, branchbyte2

|value1, value2 →

|if ''value1'' is less than ''value2'', branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|if_icmpne

Line 803:

|2: branchbyte1, branchbyte2

|value1, value2 →

|if ints are not equal, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|ifeq

Line 810:

|2: branchbyte1, branchbyte2

|value →

|if ''value'' is 0, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|ifge

Line 817:

|2: branchbyte1, branchbyte2

|value →

|if ''value'' is greater than or equal to 0, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|ifgt

Line 824:

|2: branchbyte1, branchbyte2

|value →

|if ''value'' is greater than 0, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|ifle

Line 831:

|2: branchbyte1, branchbyte2

|value →

|if ''value'' is less than or equal to 0, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|iflt

Line 838:

|2: branchbyte1, branchbyte2

|value →

|if ''value'' is less than 0, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|ifne

Line 845:

|2: branchbyte1, branchbyte2

|value →

|if ''value'' is not 0, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|ifnonnull

Line 852:

|2: branchbyte1, branchbyte2

|value →

|if ''value'' is not null, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|ifnull

Line 859:

|2: branchbyte1, branchbyte2

|value →

|if ''value'' is null, branch to instruction at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}})

|-

|iinc

Line 936:

|2: indexbyte1, indexbyte2

|objectref → result

|determines if an object ''objectref'' is of a given type, identified by class reference ''index'' in constant pool ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|invokedynamic

Line 943:

|4: indexbyte1, indexbyte2, 0, 0

|[arg1, [arg2 ...]] → result

|invokes a dynamic method and puts the result on the stack (might be void); the method is identified by method reference ''index'' in constant pool ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|invokeinterface

Line 950:

|4: indexbyte1, indexbyte2, count, 0

|objectref, [arg1, arg2, ...] → result

|invokes an interface method on object ''objectref'' and puts the result on the stack (might be void); the interface method is identified by method reference ''index'' in constant pool ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|invokespecial

Line 957:

|2: indexbyte1, indexbyte2

|objectref, [arg1, arg2, ...] → result

|invoke instance method on object ''objectref'' and puts the result on the stack (might be void); the method is identified by method reference ''index'' in constant pool ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|invokestatic

Line 964:

|2: indexbyte1, indexbyte2

|[arg1, arg2, ...] → result

|invoke a static method and puts the result on the stack (might be void); the method is identified by method reference ''index'' in constant pool ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|invokevirtual

Line 971:

|2: indexbyte1, indexbyte2

|objectref, [arg1, arg2, ...] → result

|invoke virtual method on object ''objectref'' and puts the result on the stack (might be void); the method is identified by method reference ''index'' in constant pool ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|ior

Line 1,069:

|2: branchbyte1, branchbyte2

|→ address

|jump to subroutine at ''branchoffset'' (signed short constructed from unsigned bytes {{mono|branchbyte1 << 8 +{{pipe}} branchbyte2}}) and place the return address on the stack

|-

|jsr_w

Line 1,076:

|4: branchbyte1, branchbyte2, branchbyte3, branchbyte4

|→ address

|jump to subroutine at ''branchoffset'' (signed int constructed from unsigned bytes {{mono|branchbyte1 << 24 +{{pipe}} branchbyte2 << 16 +{{pipe}} branchbyte3 << 8 +{{pipe}} branchbyte4}}) and place the return address on the stack

|-

|l2d

Line 1,160:

|2: indexbyte1, indexbyte2

|→ value

|push a constant ''#index'' from a constant pool (String, int, float, Class, java.lang.invoke.MethodType, java.lang.invoke.MethodHandle, or a dynamically-computed constant) onto the stack (wide ''index'' is constructed as {{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|ldc2_w

Line 1,167:

|2: indexbyte1, indexbyte2

|→ value

|push a constant ''#index'' from a constant pool (double, long, or a dynamically-computed constant) onto the stack (wide ''index'' is constructed as {{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|ldiv

Line 1,342:

|3: indexbyte1, indexbyte2, dimensions

|count1, [count2,...] → arrayref

|create a new array of ''dimensions'' dimensions of type identified by class reference in constant pool ''index'' ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}}); the sizes of each dimension is identified by ''count1'', [''count2'', etc.]

|-

|new

Line 1,349:

|2: indexbyte1, indexbyte2

|→ objectref

|create new object of type identified by class reference in constant pool ''index'' ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|newarray

Line 1,384:

|2: indexbyte1, indexbyte2

|objectref, value →

|set field to ''value'' in an object ''objectref'', where the field is identified by a field reference ''index'' in constant pool ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|putstatic

Line 1,391:

|2: indexbyte1, indexbyte2

|value →

|set static field to ''value'' in a class, where the field is identified by a field reference ''index'' in constant pool ({{mono|indexbyte1 << 8 +{{pipe}} indexbyte2}})

|-

|ret