On Sun, 28 Feb 2016, Alexander Duyck wrote: > I actually found the root cause. The problem is in add32_with_carry3. > > > +static inline unsigned int add32_with_carry3(unsigned int a, unsigned int > > b, > > + unsigned int c) > > +{ > > + asm("addl %2,%0\n\t" > > + "adcl %3,%0\n\t" > > + "adcl $0,%0" > > + : "=r" (a) > > + : "" (a), "rm" (b), "rm" (c)); > > + > > + return a; > > +} > > + > > You need to set the 'a' input variable attribute to "0" instead of "" > and then things work for me correctly.
Or alternatively you can reduce the number of operands by one, by using `"+r" (a)' as output, and then removing `a' as a separate input and renumbering references to `b' and `c' accordingly. It would IMHO actually better match the in-place operation as well. FWIW, Maciej