PPT Slide

A0 A[ . . . ]

A1 X[ . . . ]

A2 count=40

A3 A*X

A4 Y

A15

MVK .S 40, A2

LDH .D *MemA, A0

LDH .D *MemX, A1

MPY .M A0, A1, A3

ADD .L A3, A4, A4

SUB .L A2, 1, A2

B .S loop

STH .D A4, *MemY

32-bits

Data Memory

.M

.L

Register File A

.D

.S

loop:

[A2]

AXY

*

.

.

.

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Now let's revisit how we get values to and from memory.

An and Xn are actually arrays of 40 values that we're multiplying. So we need some way of accessing the data in the arrays and we do this by using pointers.

The *(*) notation means we are using pointers. To use a pointer we initialize it to point to the first memory location in the array.