MIPS: Print array in columns (SPIM)
 

I have written a code that prints array in 6 columns:

# -----

# Print array elements.





        li         $t1, 0 

        la         $s0, py_sars



print_lp1: 

        bgt         $t1, 59, print_end1



        lw $a0, 0($s0)                            #get the value pointed by s0

        li $v0, 1                                 #print int

        syscall

          

        la         $a0, space

        li         $v0, 4                                 #print space between each output

          syscall



        addi         $t1, $t1, 1                        #increment counter for next element

        addi         $s0, $s0, 4

        rem        $t5, $t1, 6                        #print areas in 6 columns

        beq        $t5, $zero, newline        

        j print_lp1



newline:

        la        $a0, new_ln

        li        $v0, 4                                #print newline

        syscall

        j print_lp1



print_end1:

I can't get the elements aligned however.
We can asume that the longest length of the integer is 8, and must be right justified.
Could you please guide me on how to do this?
Thanks.

Re: MIPS: Print array in columns (SPIM)
 

- format integer as a string in some memory buffer
- measure it's length
- output 8-len spaces
- output buffer

Re: MIPS: Print array in columns (SPIM)
 

Use a static buffer 256 or so bytes in size. Plenty of room!

You can subtract the current add new character position from the buffer base to get your index. Do a modulus operation and advance that many slots by inserting spaces.
OR you can have a moving partition.

NEXT = THIS + 12 space.
print column entry,
If THIS < NEXT
SKIP = NEX - THIS print skip spaces.

OR prefill entire buffer with spaces (0x20).
Then merely skip, no fill needed since its prefilled.
But don't forget your ASCIIz terminator after the last column!

Re: MIPS: Print array in columns (SPIM)
 

You can also print character by character but your column position logic remains the same. Instead of inserting spaces, write spaces.

Re: MIPS: Print array in columns (SPIM)
 

Thanks all! Working on that part of my program now.