On Thu, May 20, 2004 at 10:18:06AM -0700, Brent 'Dax' Royal-Gordon wrote:
> Dan Sugalski wrote:
> > istrue I0, P5 # I0 = 1 if P5 is true
> > isgt I0, P5, P6 # I0 = i if P5 > P6
>
> By all means! I've thought non-branching comparison ops would be a good
> idea for years...
My goodness. Takes me back to the early 90s Acorn RISC processors, where
every instruction was conditional on the control flags. Could skip half a
dozen instructions with the same false conditional at the same cost as
performing a branch. I doubt if this would be nearly as much of an
optimization for a virtual machine, but an aggressively optimizing compiler
would make constructs like the following just that extra bit faster:
if ( foo < bar ) baz++;
--
Jon Shapcott <[EMAIL PROTECTED]>
"This is the Space Age, and we are Here To Go" - Wlliam S. Burroughs
