PPT Slide

A0 A

A1 X

A2 count=40

A3 A*X

A4 Y

A5 &A(n)

A6 &X(n)

A7 &Y

:

A15

MVK .S 40, A2

LDH .D *A5++, A0

LDH .D *A6++, A1

MPY .M A0, A1, A3

ADD .L A3, A4, A4

SUB .L A2, 1, A2

B .S loop

STH .D A4, *A7

32-bits

Data Memory

.M

.L

Register File A

.D

.S

loop:

[A2]

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Now lets return the code example with the substitutions made. *MemA now is *A5++. *MemX is now *A6++, and *MemY is now *A7.

So we do a load, .D, *A5++ into register A0. This takes the value pointed to by A5 and places it into register A0. Then we increment the pointer, moving to the next place in memory.