Efficient byte/word mirroring request

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#1009

From: egg
Date: Fri, 28 Aug 1992 14:34

20 lines
756 bytes

Does anyone know how to quickly and efficiently mirror a byte.
ie
    11001010 to 01010011

the only way I know is this

   mov  al,byte_to_shift
   mov  cx,8
ShiftLoop:
   rcr  al
   rcl  ah
   loop ShiftLoop
   mov  shifted_byte,ah

There must be an easier (and smarter) way to speed this up using logical
op's perhaps ?
Any Help appreciated.

Themie Gouthas
egg@dstos3.dsto.gov.au

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Message-ID: <1992Aug28.083405.164422@dstos3.dsto.gov.au>

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Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!yoyo.aarnet.edu.au!dstos3.dsto.gov.au!egg
From: egg@dstos3.dsto.gov.au
Newsgroups: comp.os.msdos.programmer
Subject: Efficient byte/word mirroring request
Message-ID: <1992Aug28.083405.164422@dstos3.dsto.gov.au>
Date: 28 Aug 92 14:34:05 GMT
Organization: Defence Science and Technology Organisation
Lines: 20