Atmel Evaluation Kit for the SAM4E Series of Flash Microcontrollers ATSAM4E-EK ATSAM4E-EK Data Sheet

SAM4E [DATASHEET]

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

142



Add the two multiplication results to the signed 64-bit value in RdLo and RdHi to create the resulting 64-bit 
product.



Write the 64-bit product in RdLo and RdHi.

Restrictions

In these instructions:



Do not use SP and do not use PC.



RdHi and RdLo must be different registers.

Condition Flags

These instructions do not affect the condition code flags.

Examples

SMLAL

R4, R5, R3, R8

; Multiplies R3 and R8, adds R5:R4 and writes to

; R5:R4

SMLALBT  R2, R1, R6, R7  ; Multiplies bottom halfword of R6 with top 

 ; halfword of R7, sign extends to 32-bit, adds

; R1:R2 and writes to R1:R2

SMLALTB  R2, R1, R6, R7  ; Multiplies top halfword of R6 with bottom

; halfword of R7,sign extends to 32-bit, adds R1:R2

; and writes to R1:R2

SMLALD

 R6, R8, R5, R1  ; Multiplies top halfwords in R5 and R1 and bottom

 ; halfwords of R5 and R1, adds R8:R6 and writes to

 ; R8:R6

SMLALDX  R6, R8, R5, R1  ; Multiplies top halfword in R5 with bottom

; halfword of R1, and bottom halfword of R5 with 

 ; top halfword of R1, adds R8:R6 and writes to 

 ; R8:R6.