Add support fedisableexcept, feenableexcept, fegetexcept and feupdateenv

for SH.

4 files changed, 151 insertions, 0 deletions

diff --git a/sysdeps/sh/sh4/fpu/fedisblxcpt.c b/sysdeps/sh/sh4/fpu/fedisblxcpt.c
new file mode 100644
index 0000000000..029fcc386a
--- /dev/null
+++ b/sysdeps/sh/sh4/fpu/fedisblxcpt.c
@@ -0,0 +1,39 @@
+/* Disable floating-point exceptions.
+   Copyright (C) 2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Nobuhiro Iwamatsu <iwamatsu@nigauri.org>, 2012.
+
+   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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fedisableexcept (int excepts)
+{
+  unsigned int temp, old_exc;
+
+  /* Get the current control register contents.  */
+  _FPU_GETCW (temp);
+
+  old_exc = (temp >> 5) & FE_ALL_EXCEPT;
+
+  excepts &= FE_ALL_EXCEPT;
+
+  temp &= ~(excepts << 5);
+  _FPU_SETCW (temp);
+
+  return old_exc;
+}
diff --git a/sysdeps/sh/sh4/fpu/feenablxcpt.c b/sysdeps/sh/sh4/fpu/feenablxcpt.c
new file mode 100644
index 0000000000..93fa7498e5
--- /dev/null
+++ b/sysdeps/sh/sh4/fpu/feenablxcpt.c
@@ -0,0 +1,38 @@
+/* Enable floating-point exceptions.
+   Copyright (C) 2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Nobuhiro Iwamatsu <iwamatsu@nigauri.org>, 2012.
+
+   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 <fenv.h>
+#include <fpu_control.h>
+
+int
+feenableexcept (int excepts)
+{
+  unsigned int temp, old_flag;
+
+  /* Get current exceptions.  */
+  _FPU_GETCW (temp);
+
+  old_flag = (temp >> 5) & FE_ALL_EXCEPT;
+  excepts &= FE_ALL_EXCEPT;
+
+  temp |= excepts << 5;
+  _FPU_SETCW (temp);
+
+  return old_flag;
+}
diff --git a/sysdeps/sh/sh4/fpu/fegetexcept.c b/sysdeps/sh/sh4/fpu/fegetexcept.c
new file mode 100644
index 0000000000..a849a17756
--- /dev/null
+++ b/sysdeps/sh/sh4/fpu/fegetexcept.c
@@ -0,0 +1,35 @@
+/* Get enabled floating-point exceptions.
+   Copyright (C) 2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Nobuhiro Iwamatsu <iwamatsu@nigauri.org>, 2012.
+
+   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 <fenv.h>
+#include <fpu_control.h>
+
+int
+fegetexcept (void)
+{
+  unsigned int temp;
+
+  /* Get current exceptions.  */
+  _FPU_GETCW (temp);
+  /* When read fpscr, this was initialized.
+     We need to rewrite value of temp. */
+  _FPU_SETCW (temp);
+
+  return (temp >> 5) & FE_ALL_EXCEPT;
+}
diff --git a/sysdeps/sh/sh4/fpu/feupdateenv.c b/sysdeps/sh/sh4/fpu/feupdateenv.c
new file mode 100644
index 0000000000..96a6979141
--- /dev/null
+++ b/sysdeps/sh/sh4/fpu/feupdateenv.c
@@ -0,0 +1,39 @@
+/* Install given floating-point environment and raise exceptions.
+   Copyright (C) 2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Nobuhiro Iwamatsu <iwamatsu@nigauri.org>, 2012.
+
+   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 <fenv.h>
+#include <fpu_control.h>
+
+int
+feupdateenv (const fenv_t *envp)
+{
+  unsigned int temp;
+
+  _FPU_GETCW (temp);
+  temp = (temp & FE_ALL_EXCEPT);
+
+  /* Raise the saved exception. Incidently for us the implementation
+    defined format of the values in objects of type fexcept_t is the
+    same as the ones specified using the FE_* constants. */
+  fesetenv (envp);
+  feraiseexcept ((int) temp);
+
+  return 0;
+}
+libm_hidden_def (feupdateenv)