CODEWITHSUNDEEP
assemblyfloating-pointdoublemips
aleperno
aleperno

Reputation: 58

MIPS floating point add

I'm trying to make a simple function that adds to floats passed as arguments in MIPS. Previously I did a simple code to add ints:

   move    v0,a0      
   add     v0,v0,a1   
   j       ra

Copying it I did something alike for floats

    l.d $f0,0($a0)
    l.d $f2,0($a1)
    add.d $f0,$f0,$f2
    j ra

Which results in a compiling error:

Error: illegal operands `l.d'

Which I'm guessing is because of how I'm trying to get the arguments from a0. How am I suppossed to receive double floating point arguments, adding them and returning them.

Thanks in advance

Upvotes: 1

Views: 1052

Answers (2)

aleperno
aleperno

Reputation: 58

I saw my mistake. Had to pass them by reference and respect the ABI :) Thanks

Upvotes: 1

Alexey Frunze
Alexey Frunze

Reputation: 62048

Try ldc1 instead of l.d. l.d is most likely a macro and for some reason it's not defined/available.

Upvotes: 1

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