[parisc-linux] Re: [glibc] fixing delayed exceptions in hppa

[Carlos O'Donell]

On Fri, Aug 22, 2003 at 04:24:19PM -0400, John David Anglin wrote:
> Based on what Jim Hull said, I believe that would be better.  I was using
> 
>   "fldd 0(%%sr0,%%sp),%0" : "=f" (d) : "0" (d)
> 
> There isn't a true dependency in the above but I believe that any load
> to the destination register will raise the exception.

Dave, I'm sorry if you sent me a patch and I dropped it :( Did I ever
receive a diff for this from you?

It's rather vague at times because the spec says "or an operation which
depends on a pending, trapping insn." I think DHD, and perhaps myself
got caught up on the "load or store" which probably means only
register->memory (memory->register too) and not register->register.

I'll rewrite this patch to do an fldd and see what the tests say. I'm
toatally under the assumption that this operation doesn't need to be
optimal :) (e.g. If you use feraiseexcept a lot you are not a
high-performance program).

c.