eieio(alumnit.ca)

136 pointsby soundsopvor 17 Jahren13 comments

http://alumnit.ca/~apenwarr/log/?m=200905#28

9 comments

mseebachvor 17 Jahren

This joke is attributed to Linus Thorvals:

IBM motto: "We found five vowels hiding in a corner, and we used them _all_ for the 'eieio' instruction so that we wouldn't have to use them anywhere else"

Unsourced history of eieio and sex: http://www.mail-archive.com/[email protected]/m...

davidwvor 17 Jahren

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).

kwamenum86vor 17 Jahren

Interesting story. Surprised it shot to the top though.

rmsvor 17 Jahren

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.

srnvor 17 Jahren

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

mrbuwchvor 17 Jahren

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?

wmfvor 17 Jahren

He probably just thinks Moto invented PowerPC.

kazuyavor 17 Jahren

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

lsbvor 17 Jahren

I wonder what they called POPCOUNT.

duskwuffvor 17 Jahren

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

asciilifeformvor 17 Jahren

> Sadly, there is no population-count instruction on PowerPC

Here is one man's theory as to why:

http://www.moyogo.com/blog/2005/09/secret-opcodes.html

shailesh18feb81vor 17 Jahren

looks like eieio came from IBM...not sure about sex (sign extend) instruction though.

ilkhd2vor 17 Jahren

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