A computer has three eight?element vectors in memory, Va, Vb, and Vc. Each element of a vector is a 32?bit word. Write the code to calculate all elements of Vc if the ith element is given by
Vci = ½ (Vai + Vbi)
The following provides suitable code and the output of the simulator when running this with test data.
ADR r0,Va ;r0 pointer to array Va
ADR r1,Vb ;r1 pointer to array Vb
ADR r2,Vc ;r2 pointer to array Vc
MOV r3,#8 ;r3 contains the size of the array (assume 8 here)
Loop LDR r5,[r0],#4 ;Repeat Get Va_i
LDR r6,[r1],#4 ; Get Vb_i
ADD r5,r5,r6 ;
MOV r5,r5,LSR #1 ; Calculate ½(Va_i + Vb_i)
STR r5,[r2],#4! ; save result
SUBs r3,r3,#1 ;
BNE Loop ;Until all done
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