2017-11-01 21:08:43 +07:00
|
|
|
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
2007-05-03 00:27:06 +07:00
|
|
|
/* const.h: Macros for dealing with constants. */
|
|
|
|
|
2007-05-08 14:31:11 +07:00
|
|
|
#ifndef _LINUX_CONST_H
|
|
|
|
#define _LINUX_CONST_H
|
2007-05-03 00:27:06 +07:00
|
|
|
|
|
|
|
/* Some constant macros are used in both assembler and
|
|
|
|
* C code. Therefore we cannot annotate them always with
|
2007-05-08 14:31:11 +07:00
|
|
|
* 'UL' and other type specifiers unilaterally. We
|
2007-05-03 00:27:06 +07:00
|
|
|
* use the following macros to deal with this.
|
2008-01-30 19:32:42 +07:00
|
|
|
*
|
|
|
|
* Similarly, _AT() will cast an expression with a type in C, but
|
|
|
|
* leave it unchanged in asm.
|
2007-05-03 00:27:06 +07:00
|
|
|
*/
|
|
|
|
|
|
|
|
#ifdef __ASSEMBLY__
|
|
|
|
#define _AC(X,Y) X
|
2008-01-30 19:32:42 +07:00
|
|
|
#define _AT(T,X) X
|
2007-05-03 00:27:06 +07:00
|
|
|
#else
|
|
|
|
#define __AC(X,Y) (X##Y)
|
|
|
|
#define _AC(X,Y) __AC(X,Y)
|
2008-01-30 19:32:42 +07:00
|
|
|
#define _AT(T,X) ((T)(X))
|
2007-05-03 00:27:06 +07:00
|
|
|
#endif
|
|
|
|
|
2013-04-28 06:07:49 +07:00
|
|
|
#define _BITUL(x) (_AC(1,UL) << (x))
|
|
|
|
#define _BITULL(x) (_AC(1,ULL) << (x))
|
|
|
|
|
2007-05-08 14:31:11 +07:00
|
|
|
#endif /* !(_LINUX_CONST_H) */
|