eieio

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

by soundsop • 17 years ago

136 13 17 years ago

kwamenum86• 17 years ago

Interesting story. Surprised it shot to the top though.

rms• 17 years ago

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.

lsb• 17 years ago

I wonder what they called POPCOUNT.

duskwuff• 17 years ago

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

asciilifeform• 17 years ago

> 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

srn• 17 years ago

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

kazuya• 17 years ago

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

ilkhd2• 17 years ago

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

mrbuwch• 17 years ago

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?

wmf• 17 years ago

He probably just thinks Moto invented PowerPC.

davidw• 17 years ago

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).

shailesh18feb81• 17 years ago

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

mseebach• 17 years ago

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/linux-fbdev@vuser.vu.union.edu/m...

eieio

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