.section .init0 // Places code at the top of programme memory
.include “include/individual.S” // Include individualised programme code
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// Ex E2.1
// The code included above pushes a number of unsigned 8-bit integers
// onto the stack. Write assembly code to add the 8 values on top of the
// stack together, and store the result in register pair r31:r30.
// NOTE: r8-r12 are reserved for use later in this programme; do not
// use these registers in this exercise.
// Write your code for Ex E2.1 above this line.
// Ex E2.2
// Write assembly code to add the following two unsigned 64-bit integers,
// and store the result in r7:r6:r5:r4:r3:r2:r1:r0 (lowest byte in r0):
// 0x7A20A2E59F046361
// 0x3D4E53627AE8F9CF
// NOTE: r8-r12 are reserved for use later in this programme; do not
// use these registers in this exercise.
// Write your code for Ex E2.2 above this line.
// Ex E2.3
// Registers r11:r10:r9:r8 currently hold a 32-bit signed integer in
// two’s complement format (lowest byte in r8). Write assembly code to
// perform an arithmetic right shift by 6 positions on this integer.
// The result should be stored in the same four registers.
// NOTE: r12 is reserved for use later in this programme; do not
// use this register in this exercise.
// Write your code for Ex E2.3 above this line.
// Ex E2.4
// Register r12 currently holds an 8-bit unsigned integer. Write assembly
// code to divide the value currently in r12 by 3.2 and store
// the result in r13.
// Write your code for Ex E2.4 above this line.
// END OF EXTENSION02 EXERCISES //
// DO NOT EDIT BELOW THIS LINE //
break // Terminate here for autograder
// Restore r1 before we call and C functions
ldi r16, 0
mov r1, r16
// Lets set the display into a known state so we can easily
// confirm that our programme successfully gets to this point
call display_raw_init
ldi r24, 0x77
call display_raw
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