Re: Compilation problem in ndisc.c / 2.5.1-pre2 : possible gcc bug?

[Richard B. Johnson]

On 28 Nov 2001, Erik Hensema wrote:

> 
> I've been looking into the compile problems of net/ipv6/ndisc.c in
> 2.5.1-pre2 and I found that the asm generated by gcc (2.95.3) is wrong:
> 
> This is a small part of a diff betweem two asm files generated by gcc, note
> the missing \n's in the wrong code:
> 
> -	
> -		addl 0(%ebp), %edx
> -		adcl 4(%ebp), %edx
> -		adcl 8(%ebp), %edx
> -		adcl 12(%ebp), %edx
> -		adcl 0(%ecx), %edx
> -		adcl 4(%ecx), %edx
> -		adcl 8(%ecx), %edx
> -		adcl 12(%ecx), %edx
> -		adcl %edi, %edx
> -		adcl %eax, %edx
> -		adcl $0, %edx
> -		
> +	addl 0(%ebp), %edxadcl 4(%ebp), %edxadcl 8(%ebp), %edxadcl 12(%ebp), %edxadcl 0(%ecx), %edxadcl 4(%ecx), %edxadcl 8(%ecx), %edxadcl 12(%ecx), %edxadcl %edi, %edxadcl %eax, %edxadcl $0, %edx

This is probably just some loop unrolling, not some as you say "wrong
code".

Cheers,
Dick Johnson

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