mars-simulator

For my homework I need to use MIPS to take an input with an arbitrary letter at the front followed by numbers(e.g. x123) and add 5 to the number then print out the final number (from the example the output would be 128) Jonathon Everatt .data entmsg: .asciiz "Enter a string:\n" ui1: .space 20 counter: .space 20 outmsg: .asciiz "The value +5 is:\n" .text main: #Printing the message li $v0, 4 la $a0, entmsg syscall #Saving the text li $v0, 8 la $a0, ui1 li $a1, 20 syscall #Count the length of the string la $t0, ui1 # la means load address (so we load the address of str into $t0) li $t3, 0 # $t1

I used 'compiler explorer' to convert c++ to MIPS but it doesn't work well in the MARS because of %hi and %lo I know I should change the part, but I don't know how to change... Please help $L5: lui $2,%hi($LC1) lwc1 $f0,%lo($LC1+4)($2) lwc1 $f1,%lo($LC1)($2) b $L3 $LC1: .word 1100470148 .word 0 $L17: lw $2,16($fp) addiu $3,$2,1 sw $3,16($fp) lui $4,%hi(savepath) sll $3,$2,2 addiu $2,$4,%lo(savepath) addu $2,$3,$2 li $3,1 # 0x1 sw $3,0($2) move $sp,$fp lw $fp,36($sp) addiu $sp,$sp,40 j $31 AFAIK, there is no way in Mars to have something like the gas %lo(label) or %hi(label) feature. A simple

I'm currently working with assembly language under the MIPS processor. I'm currently using MARS simulator and for reasons unknown I get the following error message after every run: Go: running try.s Error in : invalid program counter value: 0 Go: execution terminated with errors. I get this error message independent of the code I'm using, just wondering if this is a bug in the MARS simulator or if it's something I'm missing. You probably finish your program with a jr $ra (return to caller). However, the code executed by MARS doesn't have a caller - it's executed at startup and has no function

I'm trying to code this recursive function into MIPS. My problem is I'm not sure how I can do the recursive step. I'm pretty sure I got the rest correct. int recur(int n) { if(n == 1 || n == 2) { return 2; } else { return (n-4)+n*recur(n-2); } } .data promptMessage: .asciiz "Enter a number that is greater than or equal to 0: " resultMessage: .asciiz "\nThe answer is: " input: .word 0 answer: .word 0 .text .globl main main: #Read the number from the user li $v0, 4 la $a0, promptMessage syscall li $v0, 5 syscall sw $v0, input #Call the function lw $a0, input jal recur sw $v0, answer #Display

I'm trying to learn MIPS assembly language by myself using MARS simulator . For didactic reasons I'm limiting myself to not using pseudo-instructions. While trying to get the address of some data into a register, I ran into a problem because I cannot use la . I tried using lui in combination with ori , the same as if I was to load a number directly, to no avail: .data arr: .byte 0xa1 .byte 0xb2 .byte 0xc3 .byte 0xd4 .byte 0xe5 .byte 0xf6 .byte 0x7a .byte 0x8b .byte 0x9c .byte 0xad .text lui $s0, mem # <--- mars just gives me errors here :( ori $s0, mem # ?? ... Is this doable using