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@REPLYADDR Anton Ertl
<anton@mips.complang.tuwien.ac.at>
@REPLYTO 2:5075/128 Anton Ertl
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scott@slp53.sl.home (Scott Lurndal) writes:
>
anton@mips.complang.tuwien.ac.at (Anton Ertl) writes:
>>But for financial computing, where the procedures require fixed point,
>>there is no reason for floating-point. As mentioned Burroughs DFP was
>>not successful,
>
>I`m not sure how you come to that conclusion.
Someone here mentioned recently that Burroughs implemented decimal
floating point at some point, and gave up on that some time later.
>The Burroughs medium
>systems had a very successful 40+ year run (1965-2010)[*], with fixed point
>decimal.
I.e., not with decimal floating-point.
>When the last of the machines was retired in 2010 (built
>in the middle 80s), it took 27 windows boxes to replace it.
That probably says more about the software development process for the
replacement than about the utility of even fixed-point decimal. The
hardware of a 2010 Windows box running a competently written, but
straightforward Burroughs simulator is likely to outperform a 1980s
hardware implementation of the same architecture, even with word size
mismatch, decimal arithmetic and other complications.
However, I expect that the requirements for the replacement was to do
something other than a straight simulation of the old stuff.
- anton
--
`Anyone trying for "industrial quality" ISA should avoid undefined behavior.`
Mitch Alsup, <
c17fcd89-f024-40e7-a594-88a85ac10d20o@googlegroups.com>
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