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