[fpc-devel] Blackfin support

Florian Klaempfl florian at freepascal.org
Fri Jul 9 15:56:48 CEST 2010

Florian Klaempfl schrieb:
> Jeppe Johansen schrieb:
>>> Yes, but the code is not selected dynamically: if one compiles for armv5
>>> but runs it on a armv6+, the armv6 doesn't use the new instructions.
>> True, but do you think anyone does that? :) Most people know what end
>> hardware their programs will run on
>> I don't think we can have support for both in the rtl. I don't even
>> think you can do that, since GNU as won't accept ARMv6 instructions if
>> you assemble for ARMv5, and throw an error
> Well, you can always assemble for ARMv6 but use only ARMv5 instructions
> when running on ARMv5. This is what the rtl does with the PLD
> instruction in system.move: a system.move procedure with PLD is only
> used when the CPU supports it.

Of course, this aims more towards generic arm-linux programs than
embedded stuff where you usually build your custom rtl anyways.

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