swap

addi x2, x0, 1600 //initialize the stack to 1600, x2= stack pointer
ecall x6, x0, 5 //read the input to x5
add x10, x6, x0 //put the parameter in x10
addi x2, x2, -8 //make room to store x5
sd x6, 0(x2) // place x6 at the top
jal x1, myswap

ld x6, 0(x2) //restore x5 rom the stack
addi x2, x2, 8 //pop the stack
ecall x0, x10, 2 //print the value returned from the functions
ecall x0, x6, 2 //print the original value
# ORG 96 //stops infinite recurring
beq   x0, x0, exit  # if $t0 == $t1 then target


myswap:
    addi x2, x2, -8
    sd x8, 0(x2)

    addi x5, x0, 255 // x5 is a 0000 ..011111111
    and x6, x10, x5 // x6 is m=i&a, m has lest significant byte
    srai x7, x10, 8 //x7 is I shifted to left by 8
    and x7, x7, x5 //x7 is the second least sig. Byte of I

    srai x8, x10, 16 // shift I by 16 put it in x8
    slli x8, x8, 8
    or x8, x8, x6 //append the second least significant byte
    slli x8, x8, 8
    or x8, x8, x7
    add x10, x0, x8
    ld x8, 0(x2) // pop x8 frm the stack
    addi x2, x2, 8
    jalr x0, 0(x1)

exit: