ARM Architecture Reference Manual ARMv7-A and ARMv7-R edition

Assembler syntax
ROR{S} {,} ,
where:
Instruction Details
S If S is present, the instruction updates the flags. Otherwise, the flags are not updated.
See Standard assembler syntax fields on page A8-7.
The destination register.
The first operand register.
The register whose bottom byte contains the amount to rotate by.
Operation
if ConditionPassed() then
EncodingSpecificOperations();
shift_n = UInt(R[m]);
(result, carry) = Shift_C(R[n], SRType_ROR, shift_n, APSR.C);
R[d] = result;
if setflags then
APSR.N = result;
APSR.Z = IsZeroBit(result);
APSR.C = carry;
// APSR.V unchanged
Exceptions
None.
ARM DDI 0406B Copyright © 1996-1998, 2000, 2004-2008 ARM Limited. All rights reserved. A8-281