Rotate Right (immediate) provides the value of the contents of a register rotated by a constant value. The bits that are rotated off the right end are inserted into the vacated bit positions on the left.
This is an alias of MOV, MOVS (register). This means:
It has encodings from the following instruction sets: A32 ( A1 ) and T32 ( T3 ) .
| 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| != 1111 | 0 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | (0) | (0) | (0) | (0) | Rd | != 00000 | 1 | 1 | 0 | Rm | |||||||||||||
| cond | S | imm5 | stype | ||||||||||||||||||||||||||||
ROR{<c>}{<q>} {<Rd>,} <Rm>, #<imm>
is equivalent to
MOV{<c>}{<q>} <Rd>, <Rm>, ROR #<imm>
and is always the preferred disassembly.
| 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 1 | 1 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | (0) | imm3 | Rd | imm2 | 1 | 1 | Rm | |||||||||
| S | stype | ||||||||||||||||||||||||||||||
ROR{<c>}{<q>} {<Rd>,} <Rm>, #<imm>
is equivalent to
MOV{<c>}{<q>} <Rd>, <Rm>, ROR #<imm>
and is always the preferred disassembly.
| <c> |
| <q> |
| <Rd> |
For encoding A1: is the general-purpose destination register, encoded in the "Rd" field. Arm deprecates using the PC as the destination register, but if the PC is used, the instruction is a branch to the address calculated by the operation. This is an interworking branch, see Pseudocode description of operations on the AArch32 general-purpose registers and the PC. |
|
For encoding T3: is the general-purpose destination register, encoded in the "Rd" field. |
| <imm> |
For encoding A1: is the shift amount, in the range 1 to 31, encoded in the "imm5" field. |
|
For encoding T3: is the shift amount, in the range 1 to 31, encoded in the "imm3:imm2" field. |
The description of MOV, MOVS (register) gives the operational pseudocode for this instruction.
Internal version only: isa v01_31, pseudocode v2024-03_rel ; Build timestamp: 2024-03-25T10:05
Copyright © 2010-2024 Arm Limited or its affiliates. All rights reserved. This document is Non-Confidential.