1 #ifndef _LINUX_MATH64_H
2 #define _LINUX_MATH64_H
4 #include <linux/types.h>
7 #if BITS_PER_LONG == 64
10 * div_u64_rem - unsigned 64bit divide with 32bit divisor with remainder
12 * This is commonly provided by 32bit archs to provide an optimized 64bit
15 static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)
17 *remainder = dividend % divisor;
18 return dividend / divisor;
22 * div_s64_rem - signed 64bit divide with 32bit divisor with remainder
24 static inline s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder)
26 *remainder = dividend % divisor;
27 return dividend / divisor;
30 #elif BITS_PER_LONG == 32
33 static inline u64 div_u64_rem(u64 dividend, u32 divisor, u32 *remainder)
35 *remainder = do_div(dividend, divisor);
41 extern s64 div_s64_rem(s64 dividend, s32 divisor, s32 *remainder);
44 #endif /* BITS_PER_LONG */
47 * div_u64 - unsigned 64bit divide with 32bit divisor
49 * This is the most common 64bit divide and should be used if possible,
50 * as many 32bit archs can optimize this variant better than a full 64bit
54 static inline u64 div_u64(u64 dividend, u32 divisor)
57 return div_u64_rem(dividend, divisor, &remainder);
62 * div_s64 - signed 64bit divide with 32bit divisor
65 static inline s64 div_s64(s64 dividend, s32 divisor)
68 return div_s64_rem(dividend, divisor, &remainder);
72 #endif /* _LINUX_MATH64_H */