Subject:
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Re: NQC 2.0 and some math questions
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Newsgroups:
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lugnet.robotics.rcx.nqc
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Date:
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Wed, 29 Sep 1999 01:07:29 GMT
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Reply-To:
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marcob@equalis/avoidspam/.it
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Viewed:
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2294 times
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On Thu, 23 Sep 1999 00:03:43 GMT, dbaum@spambgoneenteract.com (Dave
Baum) wrote:
> A bug in the document. * and / are legal for any expressions. % is
> restricted to constants.
> I know the restrictions are confusing. The problem is that the RCX
> opcodes are somewhat incomplete. Now that I think about it, I can
> probably generate reasonable code for % from the primitives /, *, and -.
x = y % z
is equivalent to (where w is an temporary integer):
w = y / z;
x = y - z * w;
I can't think of a useful use of % just with constants.
Ciao.
Marco.
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Message has 1 Reply:
 | | Re: NQC 2.0 and some math questions
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| (...) That's exaclty what I was thinking of doing. Originally, the compiler had no way of allocating temp variables which is why code for % couldn't be emitted. The temp allocator is now pretty good, so I could emit the above sequence, but it just (...) (25 years ago, 30-Sep-99, to lugnet.robotics.rcx.nqc)
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Message is in Reply To:
| | Re: NQC 2.0 and some math questions
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| A bug in the document. * and / are legal for any expressions. % is restricted to constants. I know the restrictions are confusing. The problem is that the RCX opcodes are somewhat incomplete. Now that I think about it, I can probably generate (...) (25 years ago, 23-Sep-99, to lugnet.robotics.rcx.nqc)
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