On Mon, 18 Aug 2008, Scott Wood wrote: > Mathieu Desnoyers wrote: > > asm volatile ( > > "1: lwz %1, 0(%2)\n" > > " cmpw %1, %5\n" > > " bne 2f\n" > > " stwu %3, 0(%2)\n" > > "2:\n" > > ".section .fixup, \"ax\"\n" > > "3: li %0, 1\n" > > " b 2b\n" > > ".previous\n" > > ".section __ex_table,\"a\"\n" > > _ASM_ALIGN "\n" > > _ASM_PTR "1b, 3b\n" > > ".previous" > > : "=r"(faulted), "=r"(replaced) > > : "r"(ip), "r"(new), > > "0"(faulted), "r"(old) > > : "memory"); > > Some (most likely unrelated) nits in the above inline asm: > > Should use a "b" constraint for %2, or you could get r0. Or, use an "m" > constraint with %U2%X2 after the lwz/stw.
What syntax to do that with? lwz %1,0(%U2) stu %3, 0(%X2) I'm new to those. (and the above does not compile) > Why stwu with an offset of zero, How else to do it? stwu %3, (%2) does not compile for me. -- Steve _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@ozlabs.org https://ozlabs.org/mailman/listinfo/linuxppc-dev
