[Newbies] Questions about primitives - how to avoid one ?

[cdrick]

For whatever reasons, I want sometimes to experiment some smalltalk
code by avoiding a primitive call, like in Float>>=, which start by
<primitive:47>. Only commenting doesn't work. So, is it possible ? and
if the primitive fail, is the smalltalk code evaluated ?

Out of curiosity, where can we find the "primitive 47" code ? I
imagine in the source of the VM...  but if someone can give me some
insights :)

Thanks again

Cédrick