1*898582bdSDaniel Schwierzeck /* 2*898582bdSDaniel Schwierzeck * const.h: Macros for dealing with constants. 3*898582bdSDaniel Schwierzeck * 4*898582bdSDaniel Schwierzeck * SPDX-License-Identifier: GPL-2.0 5*898582bdSDaniel Schwierzeck */ 623ff8633SDaniel Schwierzeck 723ff8633SDaniel Schwierzeck #ifndef _LINUX_CONST_H 823ff8633SDaniel Schwierzeck #define _LINUX_CONST_H 923ff8633SDaniel Schwierzeck 1023ff8633SDaniel Schwierzeck /* Some constant macros are used in both assembler and 1123ff8633SDaniel Schwierzeck * C code. Therefore we cannot annotate them always with 1223ff8633SDaniel Schwierzeck * 'UL' and other type specifiers unilaterally. We 1323ff8633SDaniel Schwierzeck * use the following macros to deal with this. 1423ff8633SDaniel Schwierzeck * 1523ff8633SDaniel Schwierzeck * Similarly, _AT() will cast an expression with a type in C, but 1623ff8633SDaniel Schwierzeck * leave it unchanged in asm. 1723ff8633SDaniel Schwierzeck */ 1823ff8633SDaniel Schwierzeck 1923ff8633SDaniel Schwierzeck #ifdef __ASSEMBLY__ 2023ff8633SDaniel Schwierzeck #define _AT(T,X) X 2123ff8633SDaniel Schwierzeck #else 2223ff8633SDaniel Schwierzeck #define _AT(T,X) ((T)(X)) 2323ff8633SDaniel Schwierzeck #endif 2423ff8633SDaniel Schwierzeck 2523ff8633SDaniel Schwierzeck #define _BITUL(x) (_AC(1,UL) << (x)) 2623ff8633SDaniel Schwierzeck #define _BITULL(x) (_AC(1,ULL) << (x)) 2723ff8633SDaniel Schwierzeck 2823ff8633SDaniel Schwierzeck #endif /* !(_LINUX_CONST_H) */ 29