Add powerpc-nofpu/e500 support functions for atomic compound assignment and FLT_ROUNDS.

6 files changed, 147 insertions, 1 deletions

diff --git a/sysdeps/powerpc/nofpu/Makefile b/sysdeps/powerpc/nofpu/Makefile
index b9cbf80230..9de7c43747 100644
--- a/sysdeps/powerpc/nofpu/Makefile
+++ b/sysdeps/powerpc/nofpu/Makefile
@@ -2,7 +2,8 @@
 
 ifeq ($(subdir),soft-fp)
 sysdep_routines += $(gcc-single-routines) $(gcc-double-routines) \
-		   sim-full
+		   sim-full atomic-feholdexcept atomic-feclearexcept \
+		   atomic-feupdateenv flt-rounds
 endif
 
 ifeq ($(subdir),math)
diff --git a/sysdeps/powerpc/nofpu/Versions b/sysdeps/powerpc/nofpu/Versions
index 8ba6021e9e..571b1d2c96 100644
--- a/sysdeps/powerpc/nofpu/Versions
+++ b/sysdeps/powerpc/nofpu/Versions
@@ -17,6 +17,10 @@ libc {
     __gtdf2; __gtsf2;
     __ltdf2; __ltsf2;
   }
+  GLIBC_2.19 {
+    __atomic_feholdexcept; __atomic_feclearexcept; __atomic_feupdateenv;
+    __flt_rounds;
+  }
   GLIBC_PRIVATE {
     __sim_exceptions_thread;
     __sim_disabled_exceptions_thread;
diff --git a/sysdeps/powerpc/nofpu/atomic-feclearexcept.c b/sysdeps/powerpc/nofpu/atomic-feclearexcept.c
new file mode 100644
index 0000000000..c2b2ee9386
--- /dev/null
+++ b/sysdeps/powerpc/nofpu/atomic-feclearexcept.c
@@ -0,0 +1,28 @@
+/* Clear floating-point exceptions for atomic compound assignment.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "soft-fp.h"
+#include "soft-supp.h"
+
+void
+__atomic_feclearexcept (void)
+{
+  /* This function postdates the global variables being turned into
+     compat symbols, so no need to set them.  */
+  __sim_exceptions_thread = 0;
+}
diff --git a/sysdeps/powerpc/nofpu/atomic-feholdexcept.c b/sysdeps/powerpc/nofpu/atomic-feholdexcept.c
new file mode 100644
index 0000000000..07b11d0557
--- /dev/null
+++ b/sysdeps/powerpc/nofpu/atomic-feholdexcept.c
@@ -0,0 +1,38 @@
+/* Store current floating-point environment and clear exceptions for
+   atomic compound assignment.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "soft-fp.h"
+#include "soft-supp.h"
+
+void
+__atomic_feholdexcept (fenv_t *envp)
+{
+  fenv_union_t u;
+
+  u.l[0] = __sim_exceptions_thread;
+  /* The rounding mode is not changed by arithmetic, so no need to
+     save it.  */
+  u.l[1] = __sim_disabled_exceptions_thread;
+  *envp = u.fenv;
+
+  /* This function postdates the global variables being turned into
+     compat symbols, so no need to set them.  */
+  __sim_exceptions_thread = 0;
+  __sim_disabled_exceptions_thread = FE_ALL_EXCEPT;
+}
diff --git a/sysdeps/powerpc/nofpu/atomic-feupdateenv.c b/sysdeps/powerpc/nofpu/atomic-feupdateenv.c
new file mode 100644
index 0000000000..9334e1192c
--- /dev/null
+++ b/sysdeps/powerpc/nofpu/atomic-feupdateenv.c
@@ -0,0 +1,37 @@
+/* Install given floating-point environment and raise exceptions for
+   atomic compound assignment.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "soft-fp.h"
+#include "soft-supp.h"
+#include <signal.h>
+
+void
+__atomic_feupdateenv (const fenv_t *envp)
+{
+  fenv_union_t u;
+  int saved_exceptions = __sim_exceptions_thread;
+
+  /* This function postdates the global variables being turned into
+     compat symbols, so no need to set them.  */
+  u.fenv = *envp;
+  __sim_exceptions_thread |= u.l[0];
+  __sim_disabled_exceptions_thread = u.l[1];
+  if (saved_exceptions & ~__sim_disabled_exceptions_thread)
+    raise (SIGFPE);
+}
diff --git a/sysdeps/powerpc/nofpu/flt-rounds.c b/sysdeps/powerpc/nofpu/flt-rounds.c
new file mode 100644
index 0000000000..ad2bf941d1
--- /dev/null
+++ b/sysdeps/powerpc/nofpu/flt-rounds.c
@@ -0,0 +1,38 @@
+/* Return current rounding mode as correct value for FLT_ROUNDS.
+   Copyright (C) 2013 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "soft-fp.h"
+#include "soft-supp.h"
+
+int
+__flt_rounds (void)
+{
+  switch (__sim_round_mode_thread)
+    {
+    case FP_RND_ZERO:
+      return 0;
+    case FP_RND_NEAREST:
+      return 1;
+    case FP_RND_PINF:
+      return 2;
+    case FP_RND_MINF:
+      return 3;
+    default:
+      abort ();
+    }
+}