svn commit: r247871 - head/usr.sbin/bhyve

[Colin Percival]

On 03/06/13 15:16, David Malone wrote:
>> +	/*
>> +	 * We're just computing (a-b) in GF(216).
> 
>> +	ndesc = (unsigned)*hq->hq_avail_idx - (unsigned)hq->hq_cur_aidx;
> 
> I think the comment here is wrong? Subtraction (and addition) in
> GF(2^16) is just xor of 16 bit numbers. You seem to actually be
> working in Z(2^16), where subtraction is normal subtraction mod
> 65536.

Given that there's no such thing as GF(216) due to 216 = 2^3 * 3^3 not
being a prime power, the comment is definitely wrong. ;-)

-- 
Colin Percival
Security Officer Emeritus, FreeBSD | The power to serve
Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid