Hi Thomas,
Thank you and all very much
Thanks
Sudheer.A
Mike DeKoker wrote:
--- sudheer <urwithsudheer@xxxxxxxxx> wrote:
Hi Thomas,
Thomas Petazzoni wrote:
Hi,CONFIG_X86_64 in
Le Fri, 05 May 2006 18:02:48 +0530,
sudheer <urwithsudheer@xxxxxxxxx> a ?crit :
To have the compatability i have used the macro
32 bits platforms.config .Why do you need to differentiate code executed on
from code executed on 64 bits platform ? Generallyspeaking, your code
should be portable, and not rely on CONFIG_X86_64or other options of
the same kind.I want to assign some data to a long pointer
variable SysAdddr.
#ifdef CONFIG_64
*(SysAddr + num_items) = (0xaa55aa55aa000000 +
num_items);
#else
*(SysAddr + num_items) = (0x11220000 + (num_items));
#endif
If it is 64 but system i should assign 64 bit or
else 32 bit data.
Can i have any other option/method ?
Thanks
Sudheer
As previously mentioned your code should be portable
and not rely on architecture specific things like
pointer size. That being said, here's another way to
do this at roughly compile time:
if (sizeof(long) > 4)
{
*(SysAddr + num_items) =
(0xaa55aa55aa000000 + num_items);
}
else
{
*(SysAddr + num_items) =
(0x11220000 + (num_items));
}
The optimizer should remove the extraneous branch of
code.
Mike DeKoker
Signatec, Inc.
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