initial import

[patches.git] / glibc-hppa-tighter-atomic-constraints.patch

With some code compiled with -fPIC -O1, gcc may use a "register(register)"
format when stw can only take "constant(register)" ... so change the
constraint to match this requirement.

2007-02-10  Mike Frysinger  <vapier@gentoo.org>

	* sysdeps/unix/sysv/linux/hppa/bits/atomic.h
	(atomic_compare_and_exchange_val_acq): Change `m' constraint to an
	`o' memory constraint for first two input operands.

--- ports/sysdeps/unix/sysv/linux/hppa/bits/atomic.h
+++ ports/sysdeps/unix/sysv/linux/hppa/bits/atomic.h
@@ -76,7 +76,7 @@ typedef uintmax_t uatomic_max_t;
 	"stw	%%r28, %0			\n\t"			\
         "sub	%%r0, %%r21, %%r21		\n\t"			\
 	"stw	%%r21, %1			\n\t"			\
-	: "=m" (lws_ret), "=m" (lws_errno), "=m" (*mem)			\
+	: "=o" (lws_ret), "=o" (lws_errno), "=m" (*mem)			\
         : "r" (mem), "r" (oldval), "r" (newval)				\
 	: LWS_CLOBBER							\
      );									\