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git.ipfire.org Git - people/ms/u-boot.git/blob - include/linux/math64.h
1 #ifndef _LINUX_MATH64_H
2 #define _LINUX_MATH64_H
4 #include <linux/types.h>
6 #if BITS_PER_LONG == 64
9 * div_u64_rem - unsigned 64bit divide with 32bit divisor with remainder
11 * This is commonly provided by 32bit archs to provide an optimized 64bit
14 static inline u64
div_u64_rem(u64 dividend
, u32 divisor
, u32
*remainder
)
16 *remainder
= dividend
% divisor
;
17 return dividend
/ divisor
;
21 * div_s64_rem - signed 64bit divide with 32bit divisor with remainder
23 static inline s64
div_s64_rem(s64 dividend
, s32 divisor
, s32
*remainder
)
25 *remainder
= dividend
% divisor
;
26 return dividend
/ divisor
;
30 * div64_u64 - unsigned 64bit divide with 64bit divisor
32 static inline u64
div64_u64(u64 dividend
, u64 divisor
)
34 return dividend
/ divisor
;
37 #elif BITS_PER_LONG == 32
40 static inline u64
div_u64_rem(u64 dividend
, u32 divisor
, u32
*remainder
)
42 *remainder
= do_div(dividend
, divisor
);
48 extern s64
div_s64_rem(s64 dividend
, s32 divisor
, s32
*remainder
);
52 extern u64
div64_u64(u64 dividend
, u64 divisor
);
55 #endif /* BITS_PER_LONG */
58 * div_u64 - unsigned 64bit divide with 32bit divisor
60 * This is the most common 64bit divide and should be used if possible,
61 * as many 32bit archs can optimize this variant better than a full 64bit
65 static inline u64
div_u64(u64 dividend
, u32 divisor
)
68 return div_u64_rem(dividend
, divisor
, &remainder
);
73 * div_s64 - signed 64bit divide with 32bit divisor
76 static inline s64
div_s64(s64 dividend
, s32 divisor
)
79 return div_s64_rem(dividend
, divisor
, &remainder
);
83 u32
iter_div_u64_rem(u64 dividend
, u32 divisor
, u64
*remainder
);
85 #endif /* _LINUX_MATH64_H */