> - Solaris cc: are handled through inline asm, based on the code that
> GCC would generate.
Sun Studio 11 cc (__SUNPRO_C == 0x580) does not support GCC extended asm syntax,
but Sun Studio 12 cc (__SUNPRO_C >= 0x590) does.
2020-07-03 Bruno Haible <br...@clisp.org>
asyncsafe-spin: Use GCC extended asm syntax for SunStudio 12 compiler.
* lib/asyncsafe-spin.c (memory_barrier, atomic_compare_and_swap): Use
the GCC extended asm syntax also for the Sun Studio 12 compilers.
diff --git a/lib/asyncsafe-spin.c b/lib/asyncsafe-spin.c
index 81e48ad..6ea5781 100644
--- a/lib/asyncsafe-spin.c
+++ b/lib/asyncsafe-spin.c
@@ -186,14 +186,14 @@ do_unlock (asyncsafe_spinlock_t *lock)
# elif (defined __GNUC__ || defined __SUNPRO_C) && (defined __sparc ||
defined __i386 || defined __x86_64__)
/* For older versions of GCC, use inline assembly.
- GCC and the Oracle Studio C compiler understand GCC's extended asm syntax,
- but the plain Solaris cc understands only simple asm. */
+ GCC and the Oracle Studio C 12 compiler understand GCC's extended asm
syntax,
+ but the plain Oracle Studio C 11 compiler understands only simple asm. */
/* An implementation that verifies the unlocks. */
static void
memory_barrier (void)
{
-# if defined __GNUC__
+# if defined __GNUC__ || __SUNPRO_C >= 0x590
# if defined __i386 || defined __x86_64__
asm volatile ("mfence");
# endif
@@ -216,7 +216,7 @@ static unsigned int
atomic_compare_and_swap (volatile unsigned int *vp, unsigned int cmp,
unsigned int newval)
{
-# if defined __GNUC__
+# if defined __GNUC__ || __SUNPRO_C >= 0x590
unsigned int oldval;
# if defined __i386 || defined __x86_64__
asm volatile (" lock\n cmpxchgl %3,(%1)"
