Datasheet

114
11011B–ATARM–21-Feb-12
SAM3N
10.13.6 MOV and MVN
Move and Move NOT.
10.13.6.1 Syntax
MOV{S}{cond} Rd, Operand2
MOV{cond} Rd, #imm16
MVN{S}{cond} Rd, Operand2
where:
S is an optional suffix. If S is specified, the condition code flags are updated on the
result of the operation, see “Conditional execution” on page 84.
cond is an optional condition code, see “Conditional execution” on page 84.
Rd is the destination register.
Operand2 is a flexible second operand. See “Flexible second operand” on page 80 for
details of the options.
imm16 is any value in the range 0-65535.
10.13.6.2 Operation
The MOV instruction copies the value of Operand2 into Rd.
When Operand2 in a MOV instruction is a register with a shift other than LSL #0, the preferred
syntax is the corresponding shift instruction:
• ASR{S}{cond} Rd, Rm, #n is the preferred syntax for MOV{S}{cond} Rd, Rm, ASR #n
• LSL{S}{cond} Rd, Rm, #n is the preferred syntax for MOV{S}{cond} Rd, Rm, LSL #n if n != 0
• LSR{S}{cond} Rd, Rm, #n is the preferred syntax for MOV{S}{cond} Rd, Rm, LSR #n
• ROR{S}{cond} Rd, Rm, #n is the preferred syntax for MOV{S}{cond} Rd, Rm, ROR #n
• RRX{S}{cond} Rd, Rm is the preferred syntax for MOV{S}{cond} Rd, Rm, RRX.
Also, the MOV instruction permits additional forms of Operand2 as synonyms for shift
instructions:
• MOV{S}{cond} Rd, Rm, ASR Rs is a synonym for ASR{S}{cond} Rd, Rm, Rs
• MOV{S}{cond} Rd, Rm, LSL Rs is a synonym for LSL{S}{cond} Rd, Rm, Rs
• MOV{S}{cond} Rd, Rm, LSR Rs is a synonym for LSR{S}{cond} Rd, Rm, Rs
• MOV{S}{cond} Rd, Rm, ROR Rs is a synonym for ROR{S}{cond} Rd, Rm, Rs
See “ASR, LSL, LSR, ROR, and RRX” on page 110.
The MVN instruction takes the value of Operand2, performs a bitwise logical NOT operation on
the value, and places the result into Rd.
The MOVW instruction provides the same function as MOV, but is restricted to using the imm16
operand.
10.13.6.3 Restrictions
You can use SP and PC only in the MOV instruction, with the following restrictions:
• the second operand must be a register without shift
• you must not specify the S suffix.
When Rd is PC in a MOV instruction: