Those are a few exercises I've come with in order to exercise with assembly MIPS32 programming language. Simulator I've used to test: QtSpim1 (Also MARS MIPS is good to go)
Write an assembly program that reads 3 values a, b and c memorised in memory at the "values" label. Store them in $t0, $t1, and $t2 registers and calculate:
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Sum of those 3 values if the first one is positive
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Prod of those 3 values if the first one is negative
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AND of second and third value is the first one is equal to zero
Store the final value is the memory location after the last value.
Write an assembly program that outputs a string asking for 3 integer values from input a, b and c memorised in memory at the "values" label. Store them in $t0, $t1, and $t2 registers and calculate:
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Sum of those 3 values if the first one is positive
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Prod of those 3 values if the first one is negative
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AND of second and third value is the first one is equal to zero
Store the final value is the memory location after the last value inserted.
Calculate the sum of 10 numbers stored in memory and store the result back in memory
Write a procedure that, given an array stored in data segment and a number 'n', returns the n-th element of the array (remember that arrays are '0'-index based)
Write a procedure that calculates the maximum and the minimum number between integers in the array passed as parameter and prints their value on screen (syscall)
Use a procedure that calls other two sub-procedures that calculate max and min separately. Remember to save the $ra register using the stack pointer!
Write an assembly procedure that calculates the absolute value of an integer and prints its value on screen (syscall or mapped I/O)
Write an assembly program that writes numbers from 20 to 30 starting from memory-location 0x10010000 up to 0x10010028 using a cylce and ends the program. Remember: data segment starts from 0x10010000 (hex)
Write a program that writes a string that ends with '\0' in memory (using .asciiz or .ascii) Convert then all 'a's in the string with the 'e' using a cycle that iterates the string in memory. *The cycle must end when if finds '\0' (null char, its value is 0 in ascii table) *
Note: .asciiz automatically ends the string with \0 (null char), .ascii don't. If using .ascii manually insert \0
I'm working with bytes and not words since a single char is 8 bit (1 byte) is ascii code (actaully 7 bit in ascii and 8 bit in ascii extended)
So, given the string
"Hi I am a string"
and "string" the label of the data segment of the string
sb $t3, 0(string) stores 'H' in $t3, sb $t3, 1($t0) stores 'i' in $t3 and so on.
Write a program that does a research inside an array of integers, in particular:
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$a0 contains the address of the array of integers
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$a1 contains the number of elements inside the array
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$a2 contains the number to search
The program must set $s0 at 1 is the number is found, 0 otherwise.
1: Spim is a self-contained simulator that runs MIPS32 programs. It implements almost the entire MIPS32 assembler-extended instruction set.