@ if a+b >= modulus, subtract modulus.
@
@ But since comparison implies subtraction, we subtract
- @ modulus and then add it back if subraction borrowed.
+ @ modulus and then add it back if subtraction borrowed.
subs $a0,$a0,#-1
sbcs $a1,$a1,#-1
@ if a+b >= modulus, subtract modulus.
@
@ But since comparison implies subtraction, we subtract
- @ modulus and then add it back if subraction borrowed.
+ @ modulus and then add it back if subtraction borrowed.
subs $a0,$a0,#-1
sbcs $a1,$a1,#-1