forked from KolibriOS/kolibrios
28 lines
673 B
C
28 lines
673 B
C
/* const.h: Macros for dealing with constants. */
|
|
|
|
#ifndef _LINUX_CONST_H
|
|
#define _LINUX_CONST_H
|
|
|
|
/* Some constant macros are used in both assembler and
|
|
* C code. Therefore we cannot annotate them always with
|
|
* 'UL' and other type specifiers unilaterally. We
|
|
* use the following macros to deal with this.
|
|
*
|
|
* Similarly, _AT() will cast an expression with a type in C, but
|
|
* leave it unchanged in asm.
|
|
*/
|
|
|
|
#ifdef __ASSEMBLY__
|
|
#define _AC(X,Y) X
|
|
#define _AT(T,X) X
|
|
#else
|
|
#define __AC(X,Y) (X##Y)
|
|
#define _AC(X,Y) __AC(X,Y)
|
|
#define _AT(T,X) ((T)(X))
|
|
#endif
|
|
|
|
#define _BITUL(x) (_AC(1,UL) << (x))
|
|
#define _BITULL(x) (_AC(1,ULL) << (x))
|
|
|
|
#endif /* !(_LINUX_CONST_H) */
|