Re: [Flashforth-devel] C stack - passing the params (pic24/33)

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<div style="font-size:10pt;">Probably, but check the xc16 help section. I think it describes the parameter passing.Mike&nbsp;<div><signature_tag>Sent from my LG Mobile</signature_tag></div>&nbsp;&nbsp;------ Original message------ From:&nbsp;pito<pi...@vo...>Date:&nbsp;Wed, 16/07/2014 02:52To:&nbsp;flashforth-devel;Subject:[Flashforth-devel] C stack - passing the params (pic24/33)&nbsp;<pre>In the C example we pass a single 16bit short param:

 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mov &nbsp;&nbsp;&nbsp;&nbsp;[W14], W0
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.extern C4add
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;call &nbsp;&nbsp;&nbsp;_C4add
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mov &nbsp;&nbsp;&nbsp;&nbsp;W0, [W14]

So my current understanding is to pass 4 shorts (2 floats) would mean something like this:

( f1l &nbsp;f1h &nbsp;f2l &nbsp;f2h &nbsp;-- &nbsp;fl &nbsp;fh )

 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mov &nbsp;&nbsp;&nbsp;&nbsp;[W14--], W0 &nbsp;; f2h
	mov &nbsp;&nbsp;&nbsp;&nbsp;[W14--], W1 &nbsp;; f2l
	mov &nbsp;&nbsp;&nbsp;&nbsp;[W14--], W2 &nbsp;; f1h
	mov &nbsp;&nbsp;&nbsp;&nbsp;[W14], &nbsp;&nbsp;W3 &nbsp;; f1l
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;.extern Cfadd
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;call &nbsp;&nbsp;&nbsp;_Cfadd
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mov &nbsp;&nbsp;&nbsp;&nbsp;W0, [W14++] &nbsp;; fl
	mov &nbsp;&nbsp;&nbsp;&nbsp;W1, [W14] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;; fh

Am I correct??
Thanks,
P.

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