lkml.org 
[lkml]   [2007]   [Nov]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [patch 1/6] x86: apicdef unification: some constants made unsigned
Maciej W. Rozycki wrote:
> On Tue, 6 Nov 2007, Robert Richter wrote:
>
>> -#define GET_APIC_VERSION(x) ((x)&0xFF)
>> -#define GET_APIC_MAXLVT(x) (((x)>>16)&0xFF)
>> -#define APIC_INTEGRATED(x) ((x)&0xF0)
>> +#define GET_APIC_VERSION(x) ((x)&0xFFu)
>> +#define GET_APIC_MAXLVT(x) (((x)>>16)&0xFFu)
>> +#define APIC_INTEGRATED(x) ((x)&0xF0u)
>
> No point in doing this -- hexadecimal literals are unsigned by
> definition. File a compiler bug if you see them interpreted otherwise.
>

Not unless they have to be (see C99 if you don't believe me... on a
I32LP64 system for example, 0x7fffffff is signed int, 0x80000000 is
unsigned int, 0x100000000 is signed long).

What is this supposed to solve in the first place?

-hpa

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-11-12 19:07    [W:1.124 / U:0.000 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site