How to fix: asm output is not an lvalue

[Sam Ravnborg <sam@ravnborg.org>]

Hi all.

Following code snippet generate these warnings:
t.c:9:9: warning: asm output is not an lvalue
t.c:10:10: warning: asm output is not an lvalue
t.c:9:9: warning: generating address of non-lvalue (11)
t.c:10:10: warning: generating address of non-lvalue (11)

The code snippet is part of the math emu in the kernel.
For sparc32 I get a lot of the "asm output is not an lvalue"
warnings.

For sparc32 I do not get the "generating address of non-lvalue".

Can you help me gettitng rid of these warnings?

Thanks in advance,

	Sam



$ cat t.c
static void todo(void)
{
        typedef unsigned int USItype __attribute__((mode(SI)));
        USItype l1;

        USItype DR_f0, DA_f1, DB_f1, DA_f0, DB_f0;

 __asm__ ("subcc %r4,%5,%1\n\t" "subx %r2,%3,%0\n" :
 "=r" ((USItype)(l1)),
 "=&r" ((USItype)(DR_f0)) :
 "rJ" ((USItype)(DA_f1)),
 "rI" ((USItype)(DB_f1)),
 "rJ" ((USItype)(DA_f0)),
 "rI" ((USItype)(DB_f0)) :
 "cc");
}