Linus Torvalds writes: (Summary) On Tue, Jun 5, 2018 at 4:01 PM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
In fact, looking at Agner Fog's instruction lists, I don't see any CPU where it would make a difference, except for the P4 (where the immediate looks like it's a bad idea because it's an extra uop, but it might pack fine and not be noticeable).
might pack fine and not be noticeable).
But maybe I'm missing something subtle. Linus
Linus
Linus
<torvalds@linux-foundation.org> wrote:
[...]
registers.In fact, looking at Agner Fog's instruction lists, I don't see any CPU where it would make a difference, except for the P4 (where the immediate looks like it's a bad idea because it's an extra uop, but it might pack fine and not be noticeable).
might pack fine and not be noticeable).
But maybe I'm missing something subtle. Linus
Linus
Linus