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From: mash@mips.COM (John Mashey)
Newsgroups: comp.arch
Subject: Re: standard extensions
Message-ID: <46168@mips.mips.COM>
Date: 25 Feb 91 20:17:50 GMT
References: <1087@kaos.MATH.UCLA.EDU> <14814@lanl.gov> <1991Feb15.192653.9846@rice.edu> <6049@mentor.cc.purdue.edu> <3381.27c548c3@iccgcc.decnet.ab.com>
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Reply-To: mash@mips.COM (John Mashey)
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In article <3381.27c548c3@iccgcc.decnet.ab.com> herrickd@iccgcc.decnet.ab.com (daniel lance herrick) writes:
....
>What has frosted me about the languages is that the arithmetic
>operators are all single valued.  I usually want the quotient
>and remainder from a division.  I have to tell the compiler to
>give me the quotient and then tell it to give me the remainder.
>It might be smart enough to notice that it gets both of them in
>one machine operation, but if it is, it is only undoing bad language
>design.

I have no idea if it does it in all cases that would make sense.
However, at least the current MIPS compilers and assembler, if faced with:
	i = j / k;
	l = j % k;
conspire to execute a single division instruction.
(To see this, you have to look not at the generated .s file, which has two
divs, but at the dis-assembly of the .o or a.out, which shows only 1...)
-- 
-john mashey	DISCLAIMER: <generic disclaimer, I speak for me only, etc>
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