On 9 January 2015 at 11:25, Frediano Ziglio <fredd...@gmail.com> wrote: > Let compiler do the job to optimise the function. > > Signed-off-by: Frediano Ziglio <frediano.zig...@huawei.com> > --- > include/qemu-common.h | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/include/qemu-common.h b/include/qemu-common.h > index f862214..f3033ae 100644 > --- a/include/qemu-common.h > +++ b/include/qemu-common.h > @@ -370,6 +370,12 @@ static inline uint8_t from_bcd(uint8_t val) > } > > /* compute with 96 bit intermediate result: (a*b)/c */ > +#ifdef CONFIG_INT128 > +static inline uint64_t muldiv64(uint64_t a, uint32_t b, uint32_t c) > +{ > + return (__int128)a * b / c;
Wrong type -- this should be __int128_t, which is what we check for in our configure test. (Or __uint128_t I suppose.) thanks -- PMM