[Define to 1 if the target supports __attribute__((alias(...))).])
fi])
-dnl Check whether the target supports __sync_fetch_and_add.
-AC_DEFUN([LIBGFOR_CHECK_SYNC_FETCH_AND_ADD], [
- AC_CACHE_CHECK([whether the target supports __sync_fetch_and_add],
- libgfor_cv_have_sync_fetch_and_add, [
+dnl Check whether the target supports __atomic_fetch_add.
+AC_DEFUN([LIBGFOR_CHECK_ATOMIC_FETCH_ADD], [
+ AC_CACHE_CHECK([whether the target supports __atomic_fetch_add],
+ libgfor_cv_have_atomic_fetch_add, [
AC_LINK_IFELSE([AC_LANG_PROGRAM([[int foovar = 0;]], [[
-if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1);
-if (foovar > 10) return __sync_add_and_fetch (&foovar, -1);]])],
- libgfor_cv_have_sync_fetch_and_add=yes, libgfor_cv_have_sync_fetch_and_add=no)])
- if test $libgfor_cv_have_sync_fetch_and_add = yes; then
- AC_DEFINE(HAVE_SYNC_FETCH_AND_ADD, 1,
- [Define to 1 if the target supports __sync_fetch_and_add])
+if (foovar <= 0) return __atomic_fetch_add (&foovar, 1, __ATOMIC_ACQ_REL);
+if (foovar > 10) return __atomic_add_fetch (&foovar, -1, __ATOMIC_ACQ_REL);]])],
+ libgfor_cv_have_atomic_fetch_add=yes, libgfor_cv_have_atomic_fetch_add=no)])
+ if test $libgfor_cv_have_atomic_fetch_add = yes; then
+ AC_DEFINE(HAVE_ATOMIC_FETCH_ADD, 1,
+ [Define to 1 if the target supports __atomic_fetch_add])
fi])
dnl Check for pragma weak.
docdir
oldincludedir
includedir
+runstatedir
localstatedir
sharedstatedir
sysconfdir
sysconfdir='${prefix}/etc'
sharedstatedir='${prefix}/com'
localstatedir='${prefix}/var'
+runstatedir='${localstatedir}/run'
includedir='${prefix}/include'
oldincludedir='/usr/include'
docdir='${datarootdir}/doc/${PACKAGE_TARNAME}'
| -silent | --silent | --silen | --sile | --sil)
silent=yes ;;
+ -runstatedir | --runstatedir | --runstatedi | --runstated \
+ | --runstate | --runstat | --runsta | --runst | --runs \
+ | --run | --ru | --r)
+ ac_prev=runstatedir ;;
+ -runstatedir=* | --runstatedir=* | --runstatedi=* | --runstated=* \
+ | --runstate=* | --runstat=* | --runsta=* | --runst=* | --runs=* \
+ | --run=* | --ru=* | --r=*)
+ runstatedir=$ac_optarg ;;
+
-sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
ac_prev=sbindir ;;
-sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
for ac_var in exec_prefix prefix bindir sbindir libexecdir datarootdir \
datadir sysconfdir sharedstatedir localstatedir includedir \
oldincludedir docdir infodir htmldir dvidir pdfdir psdir \
- libdir localedir mandir
+ libdir localedir mandir runstatedir
do
eval ac_val=\$$ac_var
# Remove trailing slashes.
--sysconfdir=DIR read-only single-machine data [PREFIX/etc]
--sharedstatedir=DIR modifiable architecture-independent data [PREFIX/com]
--localstatedir=DIR modifiable single-machine data [PREFIX/var]
+ --runstatedir=DIR modifiable per-process data [LOCALSTATEDIR/run]
--libdir=DIR object code libraries [EPREFIX/lib]
--includedir=DIR C header files [PREFIX/include]
--oldincludedir=DIR C header files for non-gcc [/usr/include]
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 12687 "configure"
+#line 12699 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
lt_status=$lt_dlunknown
cat > conftest.$ac_ext <<_LT_EOF
-#line 12793 "configure"
+#line 12805 "configure"
#include "confdefs.h"
#if HAVE_DLFCN_H
We can't simply define LARGE_OFF_T to be 9223372036854775807,
since some C++ compilers masquerading as C compilers
incorrectly reject 9223372036854775807. */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
&& LARGE_OFF_T % 2147483647 == 1)
? 1 : -1];
We can't simply define LARGE_OFF_T to be 9223372036854775807,
since some C++ compilers masquerading as C compilers
incorrectly reject 9223372036854775807. */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
&& LARGE_OFF_T % 2147483647 == 1)
? 1 : -1];
We can't simply define LARGE_OFF_T to be 9223372036854775807,
since some C++ compilers masquerading as C compilers
incorrectly reject 9223372036854775807. */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
&& LARGE_OFF_T % 2147483647 == 1)
? 1 : -1];
We can't simply define LARGE_OFF_T to be 9223372036854775807,
since some C++ compilers masquerading as C compilers
incorrectly reject 9223372036854775807. */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
&& LARGE_OFF_T % 2147483647 == 1)
? 1 : -1];
We can't simply define LARGE_OFF_T to be 9223372036854775807,
since some C++ compilers masquerading as C compilers
incorrectly reject 9223372036854775807. */
-#define LARGE_OFF_T (((off_t) 1 << 62) - 1 + ((off_t) 1 << 62))
+#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + (((off_t) 1 << 31) << 31))
int off_t_is_large[(LARGE_OFF_T % 2147483629 == 721
&& LARGE_OFF_T % 2147483647 == 1)
? 1 : -1];
fi
-# Check out sync builtins support.
+# Check out atomic builtins support.
- { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the target supports __sync_fetch_and_add" >&5
-$as_echo_n "checking whether the target supports __sync_fetch_and_add... " >&6; }
-if ${libgfor_cv_have_sync_fetch_and_add+:} false; then :
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether the target supports __atomic_fetch_add" >&5
+$as_echo_n "checking whether the target supports __atomic_fetch_add... " >&6; }
+if ${libgfor_cv_have_atomic_fetch_add+:} false; then :
$as_echo_n "(cached) " >&6
else
main ()
{
-if (foovar <= 0) return __sync_fetch_and_add (&foovar, 1);
-if (foovar > 10) return __sync_add_and_fetch (&foovar, -1);
+if (foovar <= 0) return __atomic_fetch_add (&foovar, 1, __ATOMIC_ACQ_REL);
+if (foovar > 10) return __atomic_add_fetch (&foovar, -1, __ATOMIC_ACQ_REL);
;
return 0;
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
- libgfor_cv_have_sync_fetch_and_add=yes
+ libgfor_cv_have_atomic_fetch_add=yes
else
- libgfor_cv_have_sync_fetch_and_add=no
+ libgfor_cv_have_atomic_fetch_add=no
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgfor_cv_have_sync_fetch_and_add" >&5
-$as_echo "$libgfor_cv_have_sync_fetch_and_add" >&6; }
- if test $libgfor_cv_have_sync_fetch_and_add = yes; then
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libgfor_cv_have_atomic_fetch_add" >&5
+$as_echo "$libgfor_cv_have_atomic_fetch_add" >&6; }
+ if test $libgfor_cv_have_atomic_fetch_add = yes; then
-$as_echo "#define HAVE_SYNC_FETCH_AND_ADD 1" >>confdefs.h
+$as_echo "#define HAVE_ATOMIC_FETCH_ADD 1" >>confdefs.h
fi
static inline void
inc_waiting_locked (gfc_unit *u)
{
-#ifdef HAVE_SYNC_FETCH_AND_ADD
- (void) __sync_fetch_and_add (&u->waiting, 1);
+#ifdef HAVE_ATOMIC_FETCH_ADD
+ (void) __atomic_fetch_add (&u->waiting, 1, __ATOMIC_RELAXED);
#else
u->waiting++;
#endif
static inline int
predec_waiting_locked (gfc_unit *u)
{
-#ifdef HAVE_SYNC_FETCH_AND_ADD
- return __sync_add_and_fetch (&u->waiting, -1);
+#ifdef HAVE_ATOMIC_FETCH_ADD
+ /* Note that the pattern
+
+ if (predec_waiting_locked (u) == 0)
+ // destroy u
+
+ could be further optimized by making this be an __ATOMIC_RELEASE,
+ and then inserting a
+
+ __atomic_thread_fence (__ATOMIC_ACQUIRE);
+
+ inside the branch before destroying. But for now, lets keep it
+ simple. */
+ return __atomic_add_fetch (&u->waiting, -1, __ATOMIC_ACQ_REL);
#else
return --u->waiting;
#endif
static inline void
dec_waiting_unlocked (gfc_unit *u)
{
-#ifdef HAVE_SYNC_FETCH_AND_ADD
- (void) __sync_fetch_and_add (&u->waiting, -1);
+#ifdef HAVE_ATOMIC_FETCH_ADD
+ (void) __atomic_fetch_add (&u->waiting, -1, __ATOMIC_RELAXED);
#else
__gthread_mutex_lock (&unit_lock);
u->waiting--;
projects / gcc.git / commitdiff