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include/const.h
27 строк
662 B
Paolo Bonzini
avoid reserved identifiers for header guards
29 май 2015, 17:50
29 май 2015, 17:50
71f714a
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/* 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 */