rrx

Rotate Right with Extend (A32)

RRX{S}<c> <Rd>, <Rm>

Shifts register right by 1, inserting Carry flag into MSB.

Pseudocode Operation

shifted_result ← (C : Rm)[32:1]
Rd ← shifted_result
if S then
  N ← shifted_result[31]
  Z ← (shifted_result == 0)
  C ← Rm[0]

Example

RRX r0, r2

Encoding

Binary Layout

cond

31:28

00011

27:23

01

22:21

0

20

0000

19:16

Rd

15:12

00000

11:7

11

6:5

0

4

Rm

3:0

 

Format Data Proc

Opcode 0x01A00060

Extension A32 (Base)

Operands

• Rd
  Destination general-purpose register
• Rm
  Second source / offset general-purpose register

Related

Other forms of rrx

• rrx Rotate Right with Extend (Thumb)

More in A32 (Base)

Reference

View in Arm A64 ISA Reference ↗ Arm AArch32 ISA

Instruction Forms

Encoding	Instruction		ISA		Bit pattern
0x01A00060	RRX{<c>}{<q>} {<Rd>,} <Rm>		A32		cond | 00011 | 01 | 0 | 0000 | Rd | 00000 | 11 | 0 | Rm
0xEA4F0030	RRX{<c>}{<q>} {<Rd>,} <Rm>		T32		1110101 | 0010 | 0 | 1111 | 0 | 000 | Rd | 00 | 11 | Rm

Description

Rotate Right with Extend provides the value of the contents of a register shifted right by one place, with the Carry flag shifted into bit[31].