I am trying to reverse engineer gcc's generation of RTL and failing dismally. Alll the documentation seems to be in terms of the string representation, and I can find nothing that links that to the relevant calls. I can find some calls, but nothing that will do what I need to two. And this is just to generate 3 instructions in the prologue! Can anyone help at all with this? Regards, Nick Maclaren, University of Cambridge Computing Service, New Museums Site, Pembroke Street, Cambridge CB2 3QH, England. Email: nmm1@xxxxxxxxx Tel.: +44 1223 334761 Fax: +44 1223 334679