dup2_x1 : duplicate two words and insert beneath third word : index : visitInsn()

Description

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

Example

bipush 100
dconst_0
; stack now contains:
;     0.0 | double-word1
;     0.0 | double-word2
;     100   integer-word1
dup2_x1
; stack now contains:
;     0.0 | double-word1
;     0.0 | double-word2
;     100   integer-word1
;     0.0 | double-word1
;     0.0 | double-word2

See also

dup dup2 dup_x1 dup2_x2

Stack

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

Bytecode

Type	Description
u1	dup2_x1 = 0x5D (93)