Hi, Reviewing use of the patterns "Un%Xn" with lwz and stw instructions (where n should be the operand number) within the Linux kernel led me to spot those 2 weird cases:
arch/powerpc/include/asm/nohash/pgtable.h:__set_pte_at() __asm__ __volatile__("\ stw%U0%X0 %2,%0\n\ eieio\n\ stw%U0%X0 %L2,%1" : "=m" (*ptep), "=m" (*((unsigned char *)ptep+4)) : "r" (pte) : "memory"); I would have expected the stw to be: stw%U1%X1 %L2,%1" and: arch/powerpc/include/asm/book3s/32/pgtable.h:__set_pte_at() __asm__ __volatile__("\ stw%U0%X0 %2,%0\n\ eieio\n\ stw%U0%X0 %L2,%1" : "=m" (*ptep), "=m" (*((unsigned char *)ptep+4)) : "r" (pte) : "memory"); where I would have expected: stw%U1%X1 %L2,%1" Is it a bug or am I missing something ? Thanks, Mathieu -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com