blob: 18f2350a25d80f0b05b20840494f64eac5023a90 [file] [log] [blame]
/* const.h: Macros for dealing with constants. */
#ifndef BIOS_CONST_H
#define BIOS_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 /* BIOS_CONST_H */