64-bit and 32-bit code
lazarus / 8-Other

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faber · 2008-12-23 20:49

Hi,
I compile my app on Win 32 and on Linux x86_64. I've some procedures
with asm and when I  compile asm for 32-bit (PUSH    EAX ... ) on
x86_64 then I get error, Yes of course I must change registers (PUSH
RAX ...)
How to aviod this ? Is there any directive like {$ASMMODE intel} for
defined x86_64 system ?

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Vincent Snijders · 2008-12-24 07:48

Quote from: faber on December 23, 2008, 09:49:18 pmHow to aviod this ?
What do you want to avoid? Writing assembler for each CPU?  Use a
higher level language like pascal and a compiler to translate the high
level language to assembler for different CPUs. :-)

But I think you mean something else.

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faber · 2008-12-26 20:01

Quote from: Vincent Snijders on December 24, 2008, 08:48:20 amBut I
think you mean something else.

My english is not verry good   sorry
I just want to compile code with asm for x86 and x64 (on x86 or x64
machine). Now I must comment lines with x86 asm and uncomment lines
with x64 when I use x64 machine.

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Vincent Snijders · 2008-12-26 20:08

AFAIK, you have to write two assembler routines, one for each CPU.

You can use
{$IFDEF CPUI386} and {$IFDEF CPUX86_64} in your code. In the else part
you could add a pascal implementation for other targets (arm?,
powerpc?).

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faber · 2008-12-26 20:22

Yes, this is what I looking for. Thanks