Something went wrong. Try again.
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_MATH64_H#define _LINUX_MATH64_H
#include <linux/types.h>
#ifdef __x86_64__static inline u64 mul_u64_u64_div64(u64 a, u64 b, u64 c){ u64 q;
asm ("mulq %2; divq %3" : "=a" (q) : "a" (a), "rm" (b), "rm" (c) : "rdx");
return q;}#define mul_u64_u64_div64 mul_u64_u64_div64#endif
#ifdef __SIZEOF_INT128__static inline u64 mul_u64_u32_shr(u64 a, u32 b, unsigned int shift){ return (u64)(((unsigned __int128)a * b) >> shift);}
#else
#ifdef __i386__static inline u64 mul_u32_u32(u32 a, u32 b){ u32 high, low;
asm ("mull %[b]" : "=a" (low), "=d" (high) : [a] "a" (a), [b] "rm" (b) );
return low | ((u64)high) << 32;}#elsestatic inline u64 mul_u32_u32(u32 a, u32 b){ return (u64)a * b;}#endif
static inline u64 mul_u64_u32_shr(u64 a, u32 b, unsigned int shift){ u32 ah, al; u64 ret;
al = a; ah = a >> 32;
ret = mul_u32_u32(al, b) >> shift; if (ah) ret += mul_u32_u32(ah, b) << (32 - shift);
return ret;}
#endif /* __SIZEOF_INT128__ */
#ifndef mul_u64_u64_div64static inline u64 mul_u64_u64_div64(u64 a, u64 b, u64 c){ u64 quot, rem;
quot = a / c; rem = a % c;
return quot * b + (rem * b) / c;}#endif
static inline u64 div_u64(u64 dividend, u32 divisor){ return dividend / divisor;}
#endif /* _LINUX_MATH64_H */