paul at leyland.vispa.com
Wed Apr 4 20:43:49 CEST 2007
On Wed, 2007-04-04 at 18:31, Linas Vepstas wrote:
> FWIW, some history of base-10:
> -- IBM mainframes have supported base-10 arithmetic since the 1960's.
> This was primarily to support accounting, in order to make life
> easier for banks and utilities and anyone who sent out zillions
> of invoices every month.
> -- This base-10 arith has been backwards-compat supported all those
> decades, and is now making its debut on a modern CPU, the Power6
> due to ship "any day now". As a result, base-10 arithmetic support
> was proposed to ANSI as a libc or libm math standard, and I beleive
> the standard was recently (last year or two) accepted.
> -- I don't beleive that it is widely supported in general. The only
> hardware support will be on power6, so I don't see much point in
> doing base-10 aritmetic on anything other than that.
I was doing decimal arithmetic on a Z80 in assembly language over 25
years ago. Some skillful use of Google will unearth supporting evidence
for this claim. (Further hints on request.)
As far as I know the Z80 is still in widespread use though, I concede,
very rarely as a compute engine these days.
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