Re: writing portable code based on BITS_PER_LONG?

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Sat, 2006-08-05 23:16:29 -0700, Om N. <[email protected]> wrote:
> I am trying to port a driver written for IA32. This is a pci driver
> and has a chipset doing PCI <-> local bus data transfer, where local
> bus is 16 bit. So a number of values are converted by right/left
> shifting by 16 bits.
> 
> Now that I am doing porting, I would like to make it fully portable
> across AMD64 and IA32. What is the best method for this? Should I do
> something like,
> 
> #if  BITS_PER_LONG = 64
> shiftwidth = 48
> #else if BITS_PER_LONG = 32
> shiftwidth = 16
> #endif

I'd probably write some macros that access the parts of the longs you
want to have/set and put these into some header file.

MfG, JBG

-- 
       Jan-Benedict Glaw       [email protected]                +49-172-7608481
Signature of:                  Träume nicht von Dein Leben: Lebe Deinen Traum!
the second  :

Attachment: signature.asc
Description: Digital signature


[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux