Atmel SAM4S-XPLD Atmel ATSAM4S-XPLD ATSAM4S-XPLD Hoja De Datos

 112

SAM4S [DATASHEET]

11100E–ATARM–24-Jul-13

Though it is possible to use MOV as a branch instruction, ARM strongly recommends the use of a BX or BLX instruction
to branch for software portability to the ARM instruction set.

Condition Flags

If S is specified, these instructions:



Update the N and Z flags according to the result



Can update the C flag during the calculation of Operand2, see 



Do not affect the V flag.

Examples

   MOVS  R11, #0x000B 

; Write value of 0x000B to 

R11, flags get updated

   MOV   R1, #0xFA05  

; Write value of 0xFA05 to 

R1, flags are not updated

   MOVS  R10, R12     

; Write value in R12 to R10, 

flags get updated

   MOV   R3, #23      ; Write value of 23 to R3

   MOV   R8, SP       ; Write value of stack pointer to R8

   MVNS  R2, #0xF     ; Write value of 0xFFFFFFF0 (bitwise inverse of 0xF)

                      ; to the R2 and update flags.

Move Top.

Syntax

MOVT{cond} Rd, #imm16

where:

cond

Rd

is the destination register.

imm16

is a 16-bit immediate constant.

Operation

MOVT writes a 16-bit immediate value, imm16, to the top halfword, Rd[31:16], of its destination register. The write does
not affect Rd[15:0].

The MOV, MOVT instruction pair enables to generate any 32-bit constant.

Restrictions

Rd must not be SP and must not be PC.

Condition Flags

This instruction does not change the flags.

Examples

 MOVT   R3, #0xF123 ; Write 0xF123 to upper halfword of R3, lower halfword

                    ; and APSR are unchanged.