diff options
Diffstat (limited to 'include/linux/math.h')
| -rw-r--r-- | include/linux/math.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/linux/math.h b/include/linux/math.h index db7cdd23..85c8c8aa 100644 --- a/include/linux/math.h +++ b/include/linux/math.h @@ -153,4 +153,19 @@ static inline u32 int_sqrt64(u64 x) } #endif +#define abs(x) __abs_choose_expr(x, long long, \ + __abs_choose_expr(x, long, \ + __abs_choose_expr(x, int, \ + __abs_choose_expr(x, short, \ + __abs_choose_expr(x, char, \ + __builtin_choose_expr( \ + __builtin_types_compatible_p(typeof(x), char), \ + (char)({ signed char __x = (x); __x<0?-__x:__x; }), \ + ((void)0))))))) + +#define __abs_choose_expr(x, type, other) __builtin_choose_expr( \ + __builtin_types_compatible_p(typeof(x), signed type) || \ + __builtin_types_compatible_p(typeof(x), unsigned type), \ + ({ signed type __x = (x); __x < 0 ? -__x : __x; }), other) + #endif /* _LINUX_MATH_H */ |