Atmel Xplained Pro Evaluation Kit ATSAM4E-XPRO ATSAM4E-XPRO Data Sheet

95

SAM4E [DATASHEET]

Atmel-11157D-ATARM-SAM4E16-SAM4E8-Datasheet_12-Jun-14

Load PC-relative address.

Syntax

ADR{cond} Rd, label

where:

cond

is an optional condition code, see 

.

Rd

is the destination register.

label

is a PC-relative expression. See 

Operation

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
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. 

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 must not be SP and must not be PC.

Condition Flags

This instruction does not change the flags.

Examples

ADR

R1, TextMessage

; Write address value of a location labelled as

; TextMessage to R1