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| Rev | Author | Line No. | Line |
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| 5270 | serge | 1 | /* const.h: Macros for dealing with constants. */ |
| 2 | |||
| 3 | #ifndef _LINUX_CONST_H |
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| 4 | #define _LINUX_CONST_H |
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| 5 | |||
| 6 | /* Some constant macros are used in both assembler and |
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| 7 | * C code. Therefore we cannot annotate them always with |
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| 8 | * 'UL' and other type specifiers unilaterally. We |
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| 9 | * use the following macros to deal with this. |
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| 10 | * |
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| 11 | * Similarly, _AT() will cast an expression with a type in C, but |
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| 12 | * leave it unchanged in asm. |
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| 13 | */ |
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| 14 | |||
| 15 | #ifdef __ASSEMBLY__ |
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| 16 | #define _AC(X,Y) X |
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| 17 | #define _AT(T,X) X |
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| 18 | #else |
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| 19 | #define __AC(X,Y) (X##Y) |
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| 20 | #define _AC(X,Y) __AC(X,Y) |
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| 21 | #define _AT(T,X) ((T)(X)) |
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| 22 | #endif |
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| 23 | |||
| 24 | #define _BITUL(x) (_AC(1,UL) << (x)) |
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| 25 | #define _BITULL(x) (_AC(1,ULL) << (x)) |
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| 26 | |||
| 27 | #endif /* !(_LINUX_CONST_H) */ |