Atmel SAM4S Xplained Pro Starter and Evaluation Kit ATSAM4S-XPRO ATSAM4S-XPRO Ficha De Dados
Códigos do produto
ATSAM4S-XPRO
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
104
12.6.4.1 ADR
Load PC-relative address.
Syntax
Syntax
ADR{cond} Rd, label
where:
condis an optional condition code, see
condis an optional condition code, see
.
Operation
ADR determines the address by adding an immediate value to the PC, and writes the result to the destination
ADR determines the address by adding an immediate value to the PC, and writes the result to the destination
register.
ADR produces position-independent code, because the address is PC-relative.
If ADR is used to generate a target address for a BX or BLX instruction, ensure that bit[0] of the address generated
ADR produces position-independent code, because the address is PC-relative.
If ADR is used to generate a target address for a BX or BLX instruction, ensure that bit[0] of the address generated
is set to 1 for correct execution.
Values of label must be within the range of −4095 to +4095 from the address in the PC.
Values of label must be within the range of −4095 to +4095 from the address in the PC.
Note:
The user might have to use the .W suffix to get the maximum offset range or to generate addresses that are not word-
aligned. See
.
Restrictions
Rd
Rd
must not be SP and must not be PC.
Condition Flags
This instruction does not change the flags.
Examples
This instruction does not change the flags.
Examples
ADR
R1, TextMessage
; Write address value of a location labelled as
; TextMessage to R1