[fpc-pascal] detect CPU cores

[Dmitry Boyarintsev]

You're compiling for x64, You need to replace "eax" and "edx" with "rax"
and "rdx", since e?x are available for i386 only.

thanks,
Dmitry



On Fri, Sep 12, 2014 at 11:15 AM, Xiangrong Fang <xrfang at gmail.com> wrote:

> I found this code on the net:
>
>
> http://code.google.com/p/fpos/source/browse/kernel/cpuid.pas?r=c387b381d7a05f9328693cdcf59b0b4f633294e4
>
> It's part of the "FreePascal Operationg System" project. I suppose it is
> compatible with FreePascal of course. But while compiled, I got lots of
> errors, such as:
>
> cpuid.pas(28,3) Error: Unrecognized opcode pushfd
> cpuid.pas(29,10) Error: Unknown identifier "EAX"
> cpuid.pas(30,13) Error: Unknown identifier "EDX"
>
> Even I added {$mode objfpc}{$H+} does not help.
>
> I tried to compile this code on this platform:
>
> CPU: i3 M 390
> OS: Ubuntu x64
> FPC: 2.6.4
>
> How to use assembly in fpc anyway?
>
> Thanks.
>
> 2014-09-12 22:28 GMT+08:00 Dmitry Boyarintsev <skalogryz.lists at gmail.com>:
>
>> If you're talking bout x88_64, i386 platforms, you should be able to do
>> it using CPUID instruction
>>
>> http://en.wikipedia.org/wiki/CPUID
>>
>> thanks,
>> Dmitry
>>
>> On Fri, Sep 12, 2014 at 10:07 AM, Xiangrong Fang <xrfang at gmail.com>
>> wrote:
>>
>>> Hi All,
>>>
>>> Is there a platform independent (specifically Windows and Linux) way to
>>> detect cores and hyper-threads of the CPU? I am writing a calculation
>>> intensive app and would like to fully utilize SMP capability of the CPU.
>>>
>>> Thanks!
>>> Xiangrong
>>>
>>>
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>>>
>>
>>
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>
>
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