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

See Standard assembler syntax fields on page A8-7.
Instruction Details
The destination register. This register can be the SP or PC. If this register is the PC and S is
specified, see SUBS PC, LR and related instructions on page B6-25.
If is the PC:
the instruction causes a branch to the address moved to the PC
in the Thumb and ThumbEE instruction sets:
— the instruction must either be outside an IT block or the last instruction of an
IT block
— encoding T3 is not permitted.
In the Thumb and ThumbEE instruction sets, S must not be specified if is the SP. If
is the SP and is the SP or PC, encoding T3 is not permitted.
The source register. This register can be the SP or PC. In the Thumb and ThumbEE
instruction sets, S must not be specified if is the SP or PC.
Note
The use of the following MOV (register) instructions is deprecated:
ones in which is the SP or PC and is also the SP or PC
ones in which S is specified and is the SP, is the SP, or is the PC.
See also Changing between Thumb state and ARM state on page A4-2 about the use of the MOV PC,LR
instruction.
The pre-UAL syntax MOVS is equivalent to MOVS.
Operation
if ConditionPassed() then
EncodingSpecificOperations();
result = R[m];
if d == 15 then
ALUWritePC(result); // setflags is always FALSE here
else
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. A8-197