65.

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dup_x2

duplicate top stack word and insert beneath third word

Jasmin Syntax

     dup_x2 

Stack

Before	After
word1	word1
word2	word2
word3	word3
...	word1
	...

Description

Duplicates the top single-word stack item inserts the duplicate three words down.

Example

 dconst_0 bipush 100 ; stack now contains: ;     0.0 | double-word1 ;     0.0 | double-word2 ;     100   integer dup_x2 ; stack now contains: ;     100   integer1 ;     0.0 | double-word1 ;     0.0 | double-word2 ;     100   integer1 

Bytecode

Type	Description
u1	dup_x2 = 0x5B (91)

See Also

dup, dup2, dup_x1, dup2_x2

Notes

This instruction cannot be used if the top item on the stack is a two-word item (i.e. a long or a double-precision float). Use dup2, dup2_x1 or dup2_x2 instead.

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