* long long in 64-bit modes
@ 2005-10-10 5:20 corey taylor
2005-10-14 12:22 ` John Love-Jensen
0 siblings, 1 reply; 2+ messages in thread
From: corey taylor @ 2005-10-10 5:20 UTC (permalink / raw)
To: gcc-help
How does the long long type change in 64-bit modes for C and C++?
Does it stay 64-bit and is deprecated for long?
corey
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: long long in 64-bit modes
2005-10-10 5:20 long long in 64-bit modes corey taylor
@ 2005-10-14 12:22 ` John Love-Jensen
0 siblings, 0 replies; 2+ messages in thread
From: John Love-Jensen @ 2005-10-14 12:22 UTC (permalink / raw)
To: corey taylor, gcc-help
Hi Corey,
(Sorry for the delay, I was out of town.)
> How does the long long type change in 64-bit modes for C and C++?
>
> Does it stay 64-bit and is deprecated for long?
My expectation is:
int - natural word size of the architecture
short - half the word size of the architecture
long - twice the word size of the architecture
long long - (if available at all) twice the size of long
NOTE: my expectation differs from the C/C++ standard as the constraints of
those data types.
So for a 64-bit architecture:
short - 32 bit
int - 64 bit
long - 128 bit
long long - 256 bit
That's my expectation. That's not what I'm seeing on the 64-bit platforms I
work on.
However, for me, an acceptable alternative is C99's <stdint.h>.
--Eljay
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2005-10-14 12:22 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-10-10 5:20 long long in 64-bit modes corey taylor
2005-10-14 12:22 ` John Love-Jensen
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).