Write a program in ARM assembler that will average 64 unsigned integers that are

Question

Write a program in ARM assembler that will average 64 unsigned integers that are stored in an array. The unsigned integers are 32 bit wide words. Assume the base address of the array is stored in register R0. The result should be stored in register R5. The result should be an unsigned integer value. (Assume that the values in the array are small enough such that summing them all does not cause an overflow. Refer to the ARM instruction set reference card on Canvas for the full ARM instruction set)

Explanation / Answer

average of 64 unsigned 32-bit words that are store:

TTL Che1

AREA Program, CODE , READONLY

ENTRY

Main

LDR R0 , =Data; load the address

EDR R1 , R1, R1;

EDR R6 , R6, R6;

LDR R2 , length;

LOOP

LDR R4 ,[R0];

ADD R1 ,R1 ,R4;

ADD R0 ,R0 ,#+4;

SUBS R2 , R , #0x1;

BNE LOOP;

STR R1,Result;

MOV R6, #64;

MOV R7 , #x0;

  

Subtract

SUBS R1 , R1 ,R6;

ADD R7 ,R7 ,#1;

BHI Subtract;

MOV R5 ,R7;

SWI &11;

AREA Data1 ,DATA

Table DCW &2040;

ALIGN;

DEW &1DEA;

ALIGN;

DCW &0256;

ALIGN;

TableEnd DCD 0

AREA Data2 , DATA

Length DCW (TableEnd-Table)/4;

ALIGN;

Result DCW 0

END

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