Re: LONG, LONG math - aka 64bit math....

If we write our own MI compiler, all scalars could be unlimited in size.

Which is the way it should be.

-Steve



-----Original Message-----
From: Hall, Philip <phall@spss.com>
To: MI400@midrange.com <MI400@midrange.com>
Date: Wednesday, July 04, 2001 8:42 PM
Subject: RE: LONG, LONG math - aka 64bit math....


>In answer to your original question about when they came in OS/400, the C++
>support brought them in to play. We, as end users, got 'legal' access them
>using VisualAge C++ for OS/400.
>
>-----Original Message-----
>From: Don
>Sent: Wed 7/4/2001 10:53 AM
>To: MI400@midrange.com
>Cc:
>Subject: Re: LONG, LONG math - aka 64bit math....
>
>
>
>
>
>Agreed that this is the MI list and the concern arose from a crypto
>routine written in C and ported to the 400...but the question still stands
>and also, it would be interesting as to how far down this implementation
>actually went in the MI vs simulating 64 bit math with 32bit op codes..:)
>
>Thanks Leif....
>
>
>DOn
>
>
>
>
>On Wed, 4 Jul 2001, Leif Svalgaard wrote:
>
>> From: Don <dr2@cssas400.com>
>> > Dumb question:
>> >
>> > I told that in effect we didn't have 64bit math ops on this machine
>until
>> > v4r5/v5r1.  This is to say that "long long" variables didn't exist
until
>
>> > they finally wokeup and got serious about terabyte space and gave us
>64bit
>> > math....
>> >
>> > Can anyone confirm this for me?
>>
>> dumb answer:
>> MI only had BIN(2) and BIN(4) (i.e. 16-bit and 32-bit) binary variables
>> at least through v4r5; don't know about v5R1, but I doubt it.
>> Packed and zoned variables go to 31 digits (much beyond 64-bit).
>> Float has always had FLT(4) (32-bit) and FLT(8) (64-bit), but
>> since floats are IEEE standard, that's no news.
>> Other languages may vary.
>> But this is the MI list, right?
>>
>>
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