On Mon, Oct 06, 2014 at 04:48:52PM -0700, David Daney wrote: > On 10/06/2014 04:38 PM, Andy Lutomirski wrote: > >On 10/06/2014 02:58 PM, Rich Felker wrote: > >>On Mon, Oct 06, 2014 at 02:45:29PM -0700, David Daney wrote: > [...] > >>This is a huge ill-designed mess. > > > >Amen. > > > >Can the kernel not just emulate the instructions directly? > > In theory it could, but since there can be implementation defined > instructions, there is no way to achieve full instruction set > coverage for all possible machines. Is the issue really implementation-defined instructions with delay slots? If so it sounds like a made-up issue. They're not going to occur in real binaries. Certainly a compiler is not going to generate implementation-defined instructions, and if you're writing the asm by hand, you just don't put floating point instructions in the delay slot. Rich
