dup2_x2 : duplicate two words and insert beneath fourth word : index : visitInsn()

Description

Duplicates the top two-word item on the stack and inserts the duplicate before the previous (two-word) item on the stack. Alternatively, this instruction could be used to duplicate two single-word items and insert them before the before the third two-word (or fourth single-word) item on the stack.

Example

bipush 100
bipush 200
dconst_0
; stack now contains:
;     0.0 | double-word1
;     0.0 | double-word2
;     200   integer2-word1
;     100   integer1-word1
dup2_x2
; stack now contains:
;     0.0 | double-word1
;     0.0 | double-word2
;     200   integer2-word1
;     100   integer1-word1
;     0.0 | double-word1
;     0.0 | double-word2

See also

dup dup2 dup_x1 dup2_x1

Stack

Before	After
word1	word1
word2	word2
word3	word3
word4	word4
...	word1
	word2
	...

Bytecode

Type	Description
u1	dup2_x2 opcode = 0x5E (94)