On Tue, Dec 11, 2012 at 7:07 AM, Jakub Jelinek wrote:
>
> 2012-12-11 Jakub Jelinek
>
> PR libgcc/55451
> * fixed-bit.c (FIXED_SSADD, FIXED_USADD, FIXED_SSSUB, FIXED_USSUB,
> FIXED_SSNEG): Avoid undefined signed overflows.
This is OK.
Thanks.
Ian
On Tue, Dec 11, 2012 at 06:52:38AM -0800, Ian Lance Taylor wrote:
> I presume that the intent of the obfuscation is to make SSNEG look
> exactly like SSSUB. And SSSUB appears to have the exact problems that
> you are fixing here. So I think you ought to fix both the same way.
Ugh, I was hoping f
On Tue, Dec 11, 2012 at 4:55 AM, Jakub Jelinek wrote:
>
> This routine, besides aspiring to win obfuscated C contest (not trying to
> address that) contains two undefined signed overflows, which presumably
> show up in arm testing. One overflow is on z = x - y; line,
> where the x looks just like
Hi!
This routine, besides aspiring to win obfuscated C contest (not trying to
address that) contains two undefined signed overflows, which presumably
show up in arm testing. One overflow is on z = x - y; line,
where the x looks just like obfuscation (it is always 0), for input equal to
INT_MIN bi
