63.

prev next contents

---

dup2

duplicate top two stack words

Jasmin Syntax

     dup2 

Stack

Before	After
word1	word1
word2	word2
...	word1
	word2
	...

Description

Duplicates the top two words on the stack and pushes the duplicates onto the stack in the same order. You can use this to duplicate two single-word items (e.g. two integers, or an integer and an object reference) or one two-word item (i.e. a double or a long).

Bytecode

Type	Description
u1	dup2 opcode = 0x5C (92)

See Also

dup, dup_x1, dup2_x1, dup2_x2

---

prev next contents

Java Virtual Machine, by Jon Meyer and Troy Downing, O'Reilly Associates