------- Comment #2 from pinskia at gcc dot gnu dot org 2008-10-02 19:33 ------- asm("SLL %[temp], %[c], 16\n\t" "MULT %[a], %[c]\n\t" : [result]"=h"(result), [temp]"=r"(temp) : [a]"r"(a), [c]"r"(c) : "lo");
You need an early clobber on temp since it is written to before c is read. You want: asm("SLL %[temp], %[c], 16\n\t" "MULT %[a], %[c]\n\t" : [result]"=h"(result), [temp]"=&r"(temp) : [a]"r"(a), [c]"r"(c) : "lo"); -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Component|c |inline-asm Resolution| |INVALID http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37711