Am 30.03.20 um 22:07 schrieb Christo Crause via fpc-devel:
On Sun, Mar 29, 2020 at 11:00 PM Florian Klämpfl <[email protected]
<mailto:[email protected]>> wrote:
Am 29.03.20 um 22:46 schrieb Christo Crause via fpc-devel:
> It seems that a different instruction sequence should be used for
sign
> extension for the lx106 subarch.
Ok, I see. Let me first integrate everything done so far in trunk, then
we can continue with the details :)
I've noticed GCC uses the SLLI + SRAI instructions to perform sign
extension on ESP8266.
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?
In this case just cgcpu can be adapted to generate the right code. This
results normally in better code.
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