Atmel SAM4S Xplained Pro Starter and Evaluation Kit ATSAM4S-XPRO ATSAM4S-XPRO Data Sheet

SAM4S Series [DATASHEET]

Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14

134

Operation
Use these instructions to add 16- and 8-bit unsigned data:
The UADD16 instruction:

1. Adds each halfword from the first operand to the corresponding halfword of the second operand.

2. Writes the unsigned result in the corresponding halfwords of the destination register.

The UADD16 instruction:

1. Adds each byte of the first operand to the corresponding byte of the second operand.

2. Writes the unsigned result in the corresponding byte of the destination register.

Restrictions
Do not use SP and do not use PC

Condition Flags
These instructions do not change the flags.
Examples

UADD16 R1, R0  

; Adds halfwords in R0 to corresponding halfword of R1, 

; writes to corresponding halfword of R1

UADD8

R4, R0, R5

; Adds bytes of R0 to corresponding byte in R5 and 

; writes to corresponding byte in R4.