#if true perform matrix operation
mul.s $f7, $f5, $f6 #m * a[d][c]
add.s f7, $f7, $f5 #add (m*a[d][c])+col c
div.s $f5, $f4, $f2 #divide -a[r][d]/a[d][d] and store to m
move $f3, $zero #setting [r][d] = 0
add.s回線とmov登録回線でエラーが発生します。何か助けはありますか？
You're missing a $-sign on the line add.s f7, $f7, $f5. It should be add.s $f7, $f7, $f5.
I don't know how your assembler handles move instructions with floating-point registers (or if it does), but I'd suggest using mtc1 $zero,$f3 instead. Normally you'd follow that with a cvt.s.w or cvt.d.w to convert the value to floating point, but in the case of 0 that isn't necessary.