Article View: alt.lang.asm
Article #150Re: looking for fast min()/max()
From: Mark
Date: Wed, 06 Jan 1993 07:20
Date: Wed, 06 Jan 1993 07:20
34 lines
1069 bytes
1069 bytes
In article <1993Jan4.094755.9593@odin.diku.dk> terra@diku.dk (Morten Welinder) writes: >; ax := unsigned-min(ax,dx) >; > sub ax,dx > sbb cx,cx > and ax,cx > add ax,dx >---------------------------------------------------------------------- >; ax := unsigned-max(ax,dx) >; > sub dx,ax > add ax,dx > sbb cx,cx > and cx,dx > sub ax,cx Try this one: AX, DX = max(AX, DX), min(AX, DX) For unsigned integers: sub AX, DX sbb CX, CX and CX, AX add AX, DX sub AX, CX add DX, CX For signed integers: xor AH, 80h xor DH, 80h <The unsigned routine above> xor AH, 80h xor DH, 80h
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Path: arc1-ca.pugleaf.net!sparky!uunet!wupost!uwm.edu!csd4.csd.uwm.edu!markh From: markh@csd4.csd.uwm.edu (Mark) Newsgroups: alt.lang.asm Subject: Re: looking for fast min()/max() Date: 6 Jan 1993 07:20:02 GMT Organization: Computing Services Division, University of Wisconsin - Milwaukee Lines: 34 Message-ID: <1ie172INN39r@uwm.edu> References: <1992Dec30.152808.25311@netcom.com> <1993Jan4.094755.9593@odin.diku.dk> NNTP-Posting-Host: 129.89.7.4 Keywords: speed min max