|| (to == DFmode && (from == SImode || from == SFmode)));
}
+/* Implement TARGET_EMUTLS_VAR_INIT.
+
+ Disable emutls (gthr-gcn.h does not support it, yet). */
+
+tree
+gcn_emutls_var_init (tree, tree decl, tree)
+{
+ sorry_at (DECL_SOURCE_LOCATION (decl), "TLS is not implemented for GCN.");
+}
+
/* }}} */
/* {{{ Costs. */
#define TARGET_CONSTANT_ALIGNMENT gcn_constant_alignment
#undef TARGET_DEBUG_UNWIND_INFO
#define TARGET_DEBUG_UNWIND_INFO gcn_debug_unwind_info
+#undef TARGET_EMUTLS_VAR_INIT
+#define TARGET_EMUTLS_VAR_INIT gcn_emutls_var_init
#undef TARGET_EXPAND_BUILTIN
#define TARGET_EXPAND_BUILTIN gcn_expand_builtin
#undef TARGET_FUNCTION_ARG
--- /dev/null
+/* Threads compatibility routines for libgcc2 and libobjc. */
+/* Compile this one with gcc. */
+/* Copyright (C) 2019 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+/* AMD GCN does not support dynamic creation of threads. There may be many
+ hardware threads, but they're all created simultaneously at launch time.
+
+ This implementation is intended to provide mutexes for libgfortran, etc.
+ It is not intended to provide a TLS implementation at this time,
+ although that may be added later if needed.
+
+ __gthread_active_p returns "1" to ensure that mutexes are used, and that
+ programs attempting to use emutls will fail with the appropriate abort.
+ It is expected that the TLS tests will fail. */
+
+#ifndef GCC_GTHR_GCN_H
+#define GCC_GTHR_GCN_H
+
+#define __GTHREADS 1
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef _LIBOBJC
+#error "Objective C is not supported on AMD GCN"
+#else
+
+static inline int
+__gthread_active_p (void)
+{
+ return 1;
+}
+
+typedef int __gthread_key_t;
+typedef int __gthread_once_t;
+typedef int __gthread_mutex_t;
+typedef int __gthread_recursive_mutex_t;
+
+#define __GTHREAD_ONCE_INIT 0
+#define __GTHREAD_MUTEX_INIT 0
+#define __GTHREAD_RECURSIVE_MUTEX_INIT 0
+
+static inline int
+__gthread_once (__gthread_once_t *__once __attribute__((unused)),
+ void (*__func) (void) __attribute__((unused)))
+{
+ return 0;
+}
+
+static inline int
+__gthread_key_create (__gthread_key_t *__key __attribute__((unused)),
+ void (*__dtor) (void *) __attribute__((unused)))
+{
+ /* Operation is not supported. */
+ return -1;
+}
+
+static inline int
+__gthread_key_delete (__gthread_key_t __key __attribute__ ((__unused__)))
+{
+ /* Operation is not supported. */
+ return -1;
+}
+
+static inline void *
+__gthread_getspecific (__gthread_key_t __key __attribute__((unused)))
+{
+ return NULL;
+}
+
+static inline int
+__gthread_setspecific (__gthread_key_t __key __attribute__((unused)),
+ const void *__ptr __attribute__((unused)))
+{
+ /* Operation is not supported. */
+ return -1;
+}
+
+static inline int
+__gthread_mutex_destroy (__gthread_mutex_t *__mutex __attribute__((unused)))
+{
+ return 0;
+}
+
+static inline int
+__gthread_recursive_mutex_destroy (__gthread_recursive_mutex_t *__mutex __attribute__((unused)))
+{
+ return 0;
+}
+
+
+static inline int
+__gthread_mutex_lock (__gthread_mutex_t *__mutex)
+{
+ while (__sync_lock_test_and_set (__mutex, 1))
+ asm volatile ("s_sleep\t1" ::: "memory");
+
+ return 0;
+}
+
+static inline int
+__gthread_mutex_trylock (__gthread_mutex_t *__mutex)
+{
+ return __sync_lock_test_and_set (__mutex, 1);
+}
+
+static inline int
+__gthread_mutex_unlock (__gthread_mutex_t *__mutex)
+{
+ __sync_lock_release (__mutex);
+
+ return 0;
+}
+
+static inline int
+__gthread_recursive_mutex_lock (__gthread_recursive_mutex_t *__mutex __attribute__((unused)))
+{
+ /* Operation is not supported. */
+ return -1;
+}
+
+static inline int
+__gthread_recursive_mutex_trylock (__gthread_recursive_mutex_t *__mutex __attribute__((unused)))
+{
+ /* Operation is not supported. */
+ return -1;
+}
+
+static inline int
+__gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *__mutex __attribute__((unused)))
+{
+ /* Operation is not supported. */
+ return -1;
+}
+#endif /* _LIBOBJC */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ! GCC_GTHR_GCN_H */
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