<div dir="ltr"><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Mar 29, 2020 at 11:00 PM Florian Klämpfl <<a href="mailto:florian@freepascal.org">florian@freepascal.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Am 29.03.20 um 22:46 schrieb Christo Crause via fpc-devel:<br>> It seems that a different instruction sequence should be used for sign <br>
> extension for the lx106 subarch.<br>
<br>
Ok, I see. Let me first integrate everything done so far in trunk, then <br>
we can continue with the details :)<br></blockquote><div><br></div><div>I've noticed GCC uses the SLLI + SRAI instructions to perform sign extension on ESP8266.</div><div><br></div><div>Since different CPUs can support different subsets of the Xtensa instructions do you think a finalizecode type function can be used as a post code generation step to map unsupported instructions to alternative sequences?<br></div></div></div>