eieio

#1

Post by soundsop » Fri, May 29, 2009, 3:00 AM UTC

eieio
alumnit.ca

Re: eieio

#2

Post by kwamenum86 » Fri, May 29, 2009, 3:43 AM UTC

Interesting story. Surprised it shot to the top though.

Re: eieio

#3

Post by rms » Fri, May 29, 2009, 3:47 AM UTC

kwamenum86 wrote: post #2

Interesting story. Surprised it shot to the top though.

Lightweight enough to be an easy upvote, but hackery enough where you wouldn't feel guilty about upvoting it. It's basically a perfect story.

Re: eieio

#4

Post by lsb » Fri, May 29, 2009, 4:22 AM UTC

I wonder what they called POPCOUNT.

Re: eieio

#5

Post by srn » Fri, May 29, 2009, 4:40 AM UTC

Yeah, I was amused with that instruction when I was hacking at vxworks and hand modifying a bootloader without source code ... good times ...

Re: eieio

#6

Post by duskwuff » Fri, May 29, 2009, 5:43 AM UTC

lsb wrote: post #4

I wonder what they called POPCOUNT.

Sadly, there is no population-count instruction on PowerPC. The closest thing you get is cntlzw (Count Leading Zeroes Word).

Re: eieio

#7

Post by kazuya » Fri, May 29, 2009, 6:34 AM UTC

I've long believed one of the ISA designers was a Japanese, as eieio means kinda hooray in Japanese.

Re: eieio

#8

Post by ilkhd2 » Fri, May 29, 2009, 7:02 AM UTC

AAA on X86 is not bad.... By the way, i386 NOP is in fact XCHG EAX, EAX

Re: eieio

#9

Post by mrbuwch » Fri, May 29, 2009, 7:59 AM UTC

This brings back (mostly) fond memories of writing PowerPC assembler many years ago. One thing that seems odd to me is that the author credits Motorola with naming of the eieio instruction. I would have thought that instruction would have been in the original Power instruction set and thus it would have been IBM that named it. Anyone know?

Re: eieio

#10

Post by davidw » Fri, May 29, 2009, 8:54 AM UTC

Oh, that eieio. There's another one:

    Description: Enhanced Implementation of Emacs Interpreted Objects
    EIEIO is an Emacs lisp program which implements a controlled
    object-oriented programming methodology following the CLOS
    standard. EIEIO also has object browsing functions, and custom widget
    types. It has a fairly complete manual describing how to use it.
 
    EIEIO is now a part of CEDET (Collection of Emacs Development
    Environment Tools).