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Date:      Mon, 4 Nov 1996 21:00:10 -0700 (MST)
From:      Brandon Gillespie <>
To:        David Lewis <>
Cc:        questions@FreeBSD.ORG
Subject:   Re: Cyrix vs. Intel
Message-ID:  <>
In-Reply-To: <>

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> Does anyone know if there are problems using the new Cyrix chips with
> FreeBSD and/or Linux??  I assume not, but I really don't want to buy a
> Cyrix-based machine if it's not going to work properly with either of those
> OS's.

No, no problems.  I have two servers both running FreeBSD 2.1.5.  One is a
Cyrix 'p150+' and the other is an Intel 150mhz pentium.  The only
difference is the Cyrix floating math is NOT comparable to a pentium.  I
have a program mclock (get it at:,
compile with gcc -O).  It basically does a few math functions several
thousand times, clocking each cycle.  It returns the following results:

    Cyrix 6x86 p150+ (120mhz):

    Float Multiply: 1.2383 seconds.
    Float Divide:   1.8352 seconds.
    Fixed Multiply: 0.2938 seconds.
    Fixed Divide:   0.4039 seconds.

    Intel Pentium 150mhz:

    Float Multiply: 0.3328 seconds.
    Float Divide:   0.8398 seconds.
    Fixed Multiply: 0.2555 seconds.
    Fixed Divide:   0.8414 seconds.

-Brandon Gillespie

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