1 /* Public domain. */
2
3 #ifndef _LINUX_MATH64_H
4 #define _LINUX_MATH64_H
5
6 #include <sys/types.h>
7 #include <asm/div64.h>
8
9 static inline uint64_t
div_u64(uint64_t x,uint32_t y)10 div_u64(uint64_t x, uint32_t y)
11 {
12 return (x / y);
13 }
14
15 static inline int64_t
div_s64(int64_t x,int64_t y)16 div_s64(int64_t x, int64_t y)
17 {
18 return (x / y);
19 }
20
21 static inline uint64_t
div64_u64(uint64_t x,uint64_t y)22 div64_u64(uint64_t x, uint64_t y)
23 {
24 return (x / y);
25 }
26
27 static inline uint64_t
div64_u64_rem(uint64_t x,uint64_t y,uint64_t * rem)28 div64_u64_rem(uint64_t x, uint64_t y, uint64_t *rem)
29 {
30 *rem = x % y;
31 return (x / y);
32 }
33
34 static inline uint64_t
div_u64_rem(uint64_t x,uint32_t y,uint32_t * rem)35 div_u64_rem(uint64_t x, uint32_t y, uint32_t *rem)
36 {
37 *rem = x % y;
38 return (x / y);
39 }
40
41 static inline int64_t
div64_s64(int64_t x,int64_t y)42 div64_s64(int64_t x, int64_t y)
43 {
44 return (x / y);
45 }
46
47 static inline uint64_t
mul_u32_u32(uint32_t x,uint32_t y)48 mul_u32_u32(uint32_t x, uint32_t y)
49 {
50 return (uint64_t)x * y;
51 }
52
53 static inline uint64_t
mul_u64_u32_div(uint64_t x,uint32_t y,uint32_t div)54 mul_u64_u32_div(uint64_t x, uint32_t y, uint32_t div)
55 {
56 return (x * y) / div;
57 }
58
59 #define DIV64_U64_ROUND_UP(x, y) \
60 ({ \
61 uint64_t _t = (y); \
62 div64_u64((x) + _t - 1, _t); \
63 })
64
65 static inline uint64_t
mul_u64_u32_shr(uint64_t x,uint32_t y,unsigned int shift)66 mul_u64_u32_shr(uint64_t x, uint32_t y, unsigned int shift)
67 {
68 uint32_t hi, lo;
69 hi = x >> 32;
70 lo = x & 0xffffffff;
71
72 return (mul_u32_u32(lo, y) >> shift) +
73 (mul_u32_u32(hi, y) << (32 - shift));
74 }
75
76 #endif
77