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From: mash@mips.COM (John Mashey)
Newsgroups: comp.sys.mips
Subject: Re: R2000/R3000 Instruction Set
Message-ID: <23985@winchester.mips.COM>
Date: 25 Jul 89 01:07:54 GMT
References: <1989Jul24.154416.14251@cs.rochester.edu>
Reply-To: mash@mips.COM (John Mashey)
Distribution: usa
Organization: MIPS Computer Systems, Inc.
Lines: 15

In article <1989Jul24.154416.14251@cs.rochester.edu> crummey@cs.rochester.edu (John M. Mellor-Crummey) writes:
>I don't have access to a MIPS data book and I am interested in knowing
>whether either the R2000/R3000 chips support some sort of arithmetic
>operations with trap on exceptional conditions (e.g., add with trap on
>overflow or subtract with trap on negative).  Do the MIPS chips support
>some such instruction, or do all exceptional conditions have to be
>tested explicitly?

Arithmetic adds & subtracts [ADD, SUB, ADDI] can cause overflow exceptions,
hence need no explicit test.
-- 
-john mashey	DISCLAIMER: <generic disclaimer, I speak for me only, etc>
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