On 08/13/2014 02:02 PM, Alexei Starovoitov wrote: > On Wed, Aug 13, 2014 at 11:35 AM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote: >> >> The compiler can still think of it as a single insn, though, but some >> future compiler might not. > > I think that would be very dangerous. > compiler (user space) and kernel interpreter must have the same > understanding of ISA. > Only at the point of the interface layer. The compiler can treat it as a single instruction internally, the JIT can do peephole optimization, but as long as the instruction stream at the boundary matches the official ISA spec everything is fine. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
