Incorrect code generation by simulink

Hi,

I used a min library block in my model and the code generated for that used a fmin # define which was defined as below:

#define fminf(x,y) (x < y) ? x : y

This creates a problem when first argument is another fminf() statement. For example,

fminf(fminf(x, y), z)

The expanded form will look like this: ((x<y)?x:y<z)?(x<y)?x:y:z

This gives unexpected results.

If I update the #define as below, it works perfectly fine:

#define fminf(x,y) (((x) < (y)) ? (x) : (y))

Is this a bug? Is there a simulink option to say like "Do not generate code with ternary operator"?

Thank you.