[Python-Dev] String hash function multiplier

[Andrew MacIntyre]

On Wed, 14 Apr 2004, Jeff Epler wrote:

> imul is on all x86 architectures, but whether to use it or not depends
> on the characteristics of the target CPU.  With -mcpu=i386, imul is
> considered quite slow and a shift sequence is (almost?) always preferred
> when one operand is constant.  With -mcpu=i686 and newer, imul seems to
> be preferred.

My misunderstanding. I hadn't really comprehended the full extent of
"instruction scheduling" in this context.

--
Andrew I MacIntyre                     "These thoughts are mine alone..."
E-mail: andymac at bullseye.apana.org.au  (pref) | Snail: PO Box 370
        andymac at pcug.org.au             (alt) |        Belconnen  ACT  2616
Web:    http://www.andymac.org/               |        Australia