• =?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= (10/14) Oct 28 2004 A 16-bit byte swap seems to be missing ?

=?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= <afb algonet.se> writes:

A 16-bit byte swap seems to be missing ?
(from std.intrinsic, only has a 32-bit)

I know that the i486+ only has a "BSWAP"
instruction, but others might have it...


Here is my "all-D" implementation:

 ushort bswap(ushort v)
 {
     return ((v<<8)|(v>>>8));
 }

You can add masks if you want to ?

--anders

PS. I have heard that "bswap" is slow on
     e.g. the Pentium IV CPU, anyway ?
     (but I haven't done any benchmarking)