sxtw

Sign Extend Word

SXTW <Xd>, <Wn>

Sign-extends a 32-bit register to 64 bits (Alias for SBFM).

Pseudocode Operation

Xd ← SignExtend(Wn, 64)

Example

SXTW x0, w1

Encoding

Binary Layout

1

31

00

30:29

100110

28:23

1

22

000000

21:16

011111

15:10

Rn

9:5

Rd

4:0

 

Format Bitfield

Opcode 0x93407C00

Extension Base

Operands

• Xd
  Dest (64)
• Wn
  Source (32)

Related

More in Base

Reference

View in Arm A64 ISA Reference ↗ Arm A64 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0x0414A000	SXTW <Zd>.D, <Pg>/M, <Zn>.D		A64		00000100 | size | 010 | 10 | 0 | 101 | Pg | Zn | Zd
0x93407C00	SXTW <Xd>, <Wn>		A64		1 | 00 | 100110 | 1 | 000000 | 011111 | Rn | Rd

Description

Sign Extend Word sign-extends a word to the size of the register, and writes the result to the destination register.