Write an assembly subroutine to count the number of 1s in a 32-bit data element. Your main program should read the data element from address 0x00101000, and pass the data into the subroutine in r0. Assume your subroutine might call another subroutine, and preserve context as appropriate. Return the number of 1s in R1. Extra credit: pass the data element into the subroutine on the stack, and again, preserve context as appropriate.

.text .global main .set data1, 0x00101000

main: @your code here bl countones loop: b loop

countones:

@your code here