Question

implement in LEGV8 find the smallest value in an array.

Answer 1

Solution:

I am using following registers to hold corresponding values :

X9 : i

X22 : smallest value

X20 : base address of array

X19 : n

*************************************************
           LDUR X22, [ X20, #0 ] // Load first element in X22
           ADDI X9, X9, #0 //load i=0 for while loop
           ADDI X8, X8, #0 //load j=0 for accessing array elements
   Loop :SUB X10, X19, X9 //check condition for while loop termination
           CBZ Exit
           LSL X11, X8, #3 // lsft shift j by 3 to get next elements base address
           ADD X11, X11, X20 // get &a[i]
           LDUR X12, [ X11, #0] //get a[i] in X12
           SUBS X13, X22, X12 //check if a[i]<smallest
           B.LE Next_
           LDUR X22, X12 //if a[i] < smallest, load in X22 and loop again
           B
   Next_ :   B //loop again

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