File: const.h

package info (click to toggle)
linux-tools 3.16-3
  • links: PTS, VCS
  • area: main
  • in suites: jessie-kfreebsd
  • size: 73,776 kB
  • sloc: ansic: 962,256; perl: 14,061; makefile: 6,629; sh: 5,629; cpp: 5,599; python: 4,547; asm: 4,106; yacc: 2,566; lex: 1,436; pascal: 80; awk: 6
file content (27 lines) | stat: -rw-r--r-- 673 bytes parent folder | download | duplicates (25)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
/* 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) */