Replace bcopy() to update ether_addr

[Warner Losh]

On Aug 20, 2012, at 10:48 AM, Wojciech Puchar wrote:

>> #if defined(__i386__) || defined(__amd64__)
>>   *dst = *src;
>> #else
>>   bcopy(src, dst, ETHER_ADDR_LEN);
> #else
> short *tmp1=((*short)src),*tmp2=((*short)dst);
> *tmp2=*tmp1; *(tmp2+1)=*(tmp1+1); *(tmp2+2)=*(tmp1+2);
> 
> or use ++.
> 
> i think it is always aligned to 2 bytes and this should produce usable code on any CPU? should be 6 instructions on MIPS and PPC IMHO.

We should tag it as __aligned(2) then, no?  If so, then the compiler should generate the code you posted.

Warner