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Subject: Re: crafty and cygnus Code Fusion

Author: Hristo

Date: 13:26:11 10/24/99

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On October 24, 1999 at 16:05:03, Michel Langeveld wrote:

>On October 24, 1999 at 12:34:09, Hristo wrote:
>
>>On October 24, 1999 at 12:02:17, Michel Langeveld wrote:
>>
>>>>You are absolutely correct.
>>>>hash.c 12438  -> 297 lines in C
>>>>The errors seem to come from the assembler ...
>>>>then the line numbers are different, bizare.
>>>>
>>>>I want to get the assemebly code going now ...
>>>>so we can check it out ...
>>>
>>>Ok let me know if you are ready (rudolf@stad.dsl.nl)
>>>
>>>I also noticed in Deja in some linux newsgroups that the warnings can be
>>>ingnored. But I want to check it out for sure...
>>>
>>>Do you only get warnings like this or do you also got other warnings/errors?
>>
>>no errors. Only those warnings.
>>
>>hristo
>
>After you email the assembly Cygnus of hash.c I came to the folowing conclusing:
>-all the line numbers which are warned are 2 kind of instructiongs:
> 1) xchgw %eax,lock_hasha
> 2) xchgw %eax,lock_hashb
>
>-xchgw is an instructing which expect an 16bit var.
> eax and lock_hashb are both 32-bit (lock_hasha for example is of type lock_t
>and lock_t is of type int, which is 4 byte on intel 32bit)
>
>so the instruction to be used has to be xchgl instead of xchgw.
>
>The compiler warns about this and said it will use ax instead of eax. This is
>not entirely correct since ax can only contain the least signigicant part of
>eax. So works only as long lock_hasha doesn't exceed the 65536.
>
>I don't have cygnus home here. So I can't try for myself. Maybe you can fix this
>kind of error with some kind of compiler patch and or compiler option.
>
>Kind regards,
>
>Michel Langeveld

Thanks Michel!
I'll try to fix it ! :)

regards,
hristo



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