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Newsgroups: comp.lang.ada
Date: Thu, 4 May 2017 08:49:20 -0700 (PDT)
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Subject: Re: Large Integer Overflow - Causing a Bottleneck - Any solution.
From: Stephen Davies <joviangm@gmail.com>
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Xref: news.eternal-september.org comp.lang.ada:46668
Date: 2017-05-04T08:49:20-07:00
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On Wednesday, 3 May 2017 17:18:00 UTC+1, Simon Wright  wrote:
> Even where a GNAT is built for a machine with 64-bit addresses, it uses
> 32-bit integers as you have seen.
> 
> You could try, near the top of your program (assuming it's just one
> compilation unit),
> 
>    subtype Integer is Long_Integer;

With Gnat, I believe that Long_Integer is still 32-bit and for 64-bit you
need Long_Long_Integer. Or use "type Int64 is range -(2**63) .. 2**63-1".