On Wed, 08 Jul 2009 00:08:13 -0400, Brad Roberts <[email protected]>
wrote:
Walter Bright wrote:
Robert Jacques wrote:
On Tue, 07 Jul 2009 23:01:58 -0400, Walter Bright
<[email protected]> wrote:
Robert Jacques wrote:
(Caveat: most 32-bit compilers probably defaulted integer to int,
though 64-bit compilers are probably defaulting integer to long.)
All 32 bit C compilers defaulted int to 32 bits. 64 bit C compilers
are setting int at 32 bits for sensible compatibility reasons.
But are the 64-bit compilers setting the internal "integer" type to 32
or 64 bits? (I'm not running any 64-bit OSes at the moment to test
this)
Not that I've seen. I'd be very surprised if any did.
From wikipedia: http://en.wikipedia.org/wiki/64-bit
model short int long llong ptrs Sample operating systems
LLP64 16 32 32 64 64 Microsoft Win64 (X64/IA64)
LP64 16 32 64 64 64 Most UNIX and UNIX-like systems
(Solaris, Linux, etc)
ILP64 16 64 64 64 64 HAL
SILP64 64 64 64 64 64 ?
Thanks, but what we're looking for is is what format the data is in in
register. For example, in 32-bit C, bytes/shorts are computed as ints and
truncated back down. I've found some references to 64-bit native integers
in the CLI spec, but nothing definative.
The question boils down to is b == 0 or not:
int a = 2147483647;
long b = a+a+2; // or long long depending on platform
