Date: Sat, 28 Aug 1999 12:03:54 -0400 From: Sergey Babkin <babkin@bellatlantic.net> To: Mark Ovens <mark@dogma.freebsd-uk.eu.org> Cc: Thomas David Rivers <rivers@dignus.com>, freebsd-hackers@freebsd.org, freebsd-questions@freebsd.org, kdrobnac@mission.mvnc.edu Subject: Re: Intel Merced FreeBSD??? Message-ID: <37C8086A.2B9412FB@bellatlantic.net> References: <199908271229.IAA35280@lakes.dignus.com> <37C7312B.EE446A5C@bellatlantic.net> <19990828020123.C291@marder-1>
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Mark Ovens wrote:
>
> On Fri, Aug 27, 1999 at 08:45:31PM -0400, Sergey Babkin wrote:
> >
> > A funny thing is that Microsoft is porting essentially a
> > 32-bit version of Windows to Merced. All the programs for
> > Windows that want to use 64-bit support will have to be
> > modified because the MS compiler defines both int and long
> > as 32-bit. On the other hand the Unix compilers (at least
> > UnixWare and as far as I understood that's the common Unix
> > convention) provide a mode with 64-bit longs that gives
> > certain degree of 64-bit awareness just by recompiling.
> >
>
> marder-1:/usr/marko{57}% cat > size.c
> #include <stdio.h>
>
> int main (void)
> {
> printf("short == %d\n", sizeof(short));
> printf("int == %d\n", sizeof(int));
> printf("long == %d\n", sizeof(long));
> printf("long long == %d\n", sizeof(long long));
>
> return(0);
> }
> ^D
> marder-1:/usr/marko{57}% cc !$
> marder-1:/usr/marko{57}% ./a.out
> short == 2
> int == 4
> long == 4
> long long == 8
> marder-1:/usr/marko{57}%
>
> And the same is true on SunOS 4.1.x as well (although not 100% sure
> about "long long").
I was talking about compilers for the 64-bit machines. As far
as I understood to make porting easier the major Unix vendors
have agreed on 2 64-bit modes in addition to the compatibility
32-bit mode:
- 32-bit int, 32-bit long, 64-bit long long, 64-bit pointers
- 32-bit int, 64-bit long, 64-bit long long, 64-bit pointers
While the 64-bit Windows NT has 32-bit int, 32-bit long,
64-bit long long, 32-bit pointers, 64-bit some special
kind of pointers.
Although I may be confusing something.
-SB
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