// an argument. Otherwise, passed in A1, A2, A3 and stack.
// f64 - Only passed in two aliased f32 registers if no int reg has been used
// yet to hold an argument. Otherwise, use A2, A3 and stack. If A1 is
-// not used, it must be shadowed. If only A3 is avaiable, shadow it and
+// not used, it must be shadowed. If only A3 is available, shadow it and
// go to stack.
//
// For vararg functions, all arguments are passed in A0, A1, A2, A3 and stack.