diff options
Diffstat (limited to 'tools/build/cross-build/include')
| -rw-r--r-- | tools/build/cross-build/include/common/sys/cdefs.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/build/cross-build/include/common/sys/cdefs.h b/tools/build/cross-build/include/common/sys/cdefs.h index c129542b6180..6d62333bcffe 100644 --- a/tools/build/cross-build/include/common/sys/cdefs.h +++ b/tools/build/cross-build/include/common/sys/cdefs.h @@ -255,3 +255,22 @@ #define __BSD_VISIBLE 1 #define __ISO_C_VISIBLE 2011 #define __EXT1_VISIBLE 1 + +/* Alignment builtins for better type checking and improved code generation. */ +/* Provide fallback versions for other compilers (GCC/Clang < 10): */ +#if !__has_builtin(__builtin_is_aligned) +#define __builtin_is_aligned(x, align) \ + (((__uintptr_t)x & ((align) - 1)) == 0) +#endif +#if !__has_builtin(__builtin_align_up) +#define __builtin_align_up(x, align) \ + ((__typeof__(x))(((__uintptr_t)(x)+((align)-1))&(~((align)-1)))) +#endif +#if !__has_builtin(__builtin_align_down) +#define __builtin_align_down(x, align) \ + ((__typeof__(x))((x)&(~((align)-1)))) +#endif + +#define __align_up(x, y) __builtin_align_up(x, y) +#define __align_down(x, y) __builtin_align_down(x, y) +#define __is_aligned(x, y) __builtin_is_aligned(x, y) |