From: Adam Beneschan <adam@irvine.com>
Subject: Re: Fixed Point number mul, is it a bug?
Date: Thu, 18 Oct 2012 07:40:44 -0700 (PDT)
Date: 2012-10-18T07:40:44-07:00 [thread overview]
Message-ID: <25c0b8d7-4fed-4d11-ba56-da3d34a6aed2@googlegroups.com> (raw)
In-Reply-To: <k5omei$ab0$2@news.ox.ac.uk>
On Thursday, October 18, 2012 3:42:26 AM UTC-7, Ian Clifton wrote:
> Didn’t some IBM machines have a floating‐point format where the exponent
> was decimal rather than binary?
I don't know about IBM, but my first programming job was on a Burroughs mainframe (B3500, I think) that represented *all* numbers in decimal--integer, floating-point, everything. I don't even think it had any binary arithmetic instructions (although I think it did have bitwise AND, OR, XOR operations). Even operand addresses in instructions were in decimal (hex digits A-F in certain positions in an address signified some special indexing mode, hex digits in other places would just cause a fault).
-- Adam
next prev parent reply other threads:[~2012-10-18 14:40 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-18 7:11 Fixed Point number mul, is it a bug? kylix
2012-10-18 7:35 ` Vinzent Höfler
2012-10-18 14:49 ` Adam Beneschan
2012-10-19 9:09 ` AdaMagica
2012-10-18 7:57 ` Dmitry A. Kazakov
2012-10-18 10:34 ` Georg Bauhaus
2012-10-18 10:42 ` Ian Clifton
2012-10-18 12:37 ` Dmitry A. Kazakov
2012-10-19 22:58 ` Ian Clifton
2012-10-18 14:40 ` Adam Beneschan [this message]
2012-10-18 14:04 ` Shark8
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