diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/vdso/math64.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/vdso/math64.h b/include/vdso/math64.h index 3c08909e742b..6f1e311cfdbd 100644 --- a/include/vdso/math64.h +++ b/include/vdso/math64.h @@ -24,6 +24,26 @@ static __always_inline u32 __iter_div_u64_rem(u64 dividend, u32 divisor, u64 *re return ret; } +static __always_inline u32 __iter_div64_u64_rem(u64 dividend, u64 divisor, u64 *remainder) +{ + u32 ret = 0; + + while (dividend >= divisor) { + /* + * Prevent the compiler from optimising this loop into a + * modulo operation. + */ + OPTIMIZER_HIDE_VAR(dividend); + + dividend -= divisor; + ret++; + } + + *remainder = dividend; + + return ret; +} + #if defined(CONFIG_ARCH_SUPPORTS_INT128) && defined(__SIZEOF_INT128__) #ifndef mul_u64_u32_add_u64_shr |