I'm in favor of it meaning left shift, since that's what I've always thought it
was. I never make assumptions about what it does when shifting a negative
number to the right, but that's because I nearly always use it with nonnegative
numbers.
On Oct 30, 2020, 4:59 PM -0700, Taylor R Campbell
,
> Date: Fri, 30 Oct 2020 17:48:49 -0700
> From: "Arthur A. Gleckler"
>
> On Fri, Oct 30, 2020 at 4:59 PM Taylor R Campbell
> wrote:
>
> > - When Arthur originally documented the fix:lsh procedure in 1991
> > (bbc428a9), he documented arithmetic right shift semantics.
>
> I'm pretty sure I
On Fri, Oct 30, 2020 at 4:59 PM Taylor R Campbell <
campbell+mit-sch...@mumble.net> wrote:
> - When Arthur originally documented the fix:lsh procedure in 1991
> (bbc428a9), he documented arithmetic right shift semantics.
>
I'm pretty sure I don't deserve credit for that. If you look at the
What's (fix:lsh -123 -4) supposed to be?
The obvious choices are -8, 4194296, or 18014398509481976, depending
on whether it computes floor(-123/2^4) = -8 or whether it interprets
-123 as a DATUM_LENGTH-bit string and shifts in zeros giving 4194296 =
#x38 on 32-bit machines (26-bit fixnums) or
