Setting syntax in Gvim for Assembly

How can I automatically set the syntax of a certain file extension same as that of an existing language(say Perl) in Gvim ?

I know that I can do this u开发者_如何转开发sing

au BufNewFile,BufRead *.pl setf perl

I want to do it for assembly now..

seems like this is not working.. au BufNewFile,BufRead *.pl setf assembly

for IA assembly

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You could try setf asm

To know what syntaxes you have, list $VIMRUNTIME/syntax.