FP CW and SW handling for Arm.

diff --git a/sysdeps/arm/fpu/fclrexcpt.c b/sysdeps/arm/fpu/fclrexcpt.c
new file mode 100644 (file)
index 0000000..34ad36d
--- /dev/null
+++ b/sysdeps/arm/fpu/fclrexcpt.c
@@ -0,0 +1,39 @@
+/* Clear given exceptions in current floating-point environment.
+   Copyright (C) 1997, 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+void
+feclearexcept (int excepts)
+{
+  unsigned long int temp;
+
+  /* Mask out unsupported bits/exceptions.  */
+  excepts &= FE_ALL_EXCEPT;
+
+  /* Get the current floating point status. */
+  _FPU_GETCW(temp);
+
+  /* Clear the relevant bits.  */
+  temp &= excepts ^ FE_ALL_EXCEPT;
+
+  /* Put the new data in effect.  */
+  _FPU_SETCW(temp);
+}

diff --git a/sysdeps/arm/fpu/fegetenv.c b/sysdeps/arm/fpu/fegetenv.c
new file mode 100644 (file)
index 0000000..5b31c5e
--- /dev/null
+++ b/sysdeps/arm/fpu/fegetenv.c
@@ -0,0 +1,29 @@
+/* Store current floating-point environment.
+   Copyright (C) 1997, 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+void
+fegetenv (fenv_t *envp)
+{
+  unsigned long int temp;
+  _FPU_GETCW(temp);
+  envp->cw = temp;
+}

diff --git a/sysdeps/arm/fpu/fegetround.c b/sysdeps/arm/fpu/fegetround.c
new file mode 100644 (file)
index 0000000..5f354bb
--- /dev/null
+++ b/sysdeps/arm/fpu/fegetround.c
@@ -0,0 +1,26 @@
+/* Return current rounding direction.
+   Copyright (C) 1997, 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv.h>
+
+int
+fegetround (void)
+{
+  return FE_TONEAREST;         /* Easy. :-) */
+}

diff --git a/sysdeps/arm/fpu/fesetenv.c b/sysdeps/arm/fpu/fesetenv.c
new file mode 100644 (file)
index 0000000..b2d3ec5
--- /dev/null
+++ b/sysdeps/arm/fpu/fesetenv.c
@@ -0,0 +1,33 @@
+/* Install given floating-point environment.
+   Copyright (C) 1997, 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+void
+fesetenv (const fenv_t *envp)
+{
+  if (envp == FE_DFL_ENV)
+      _FPU_SETCW(_FPU_DEFAULT);
+  else
+    {
+      unsigned long temp = envp->cw;
+      _FPU_SETCW(temp);
+    }
+}

diff --git a/sysdeps/arm/fpu/fesetround.c b/sysdeps/arm/fpu/fesetround.c
new file mode 100644 (file)
index 0000000..7591b39
--- /dev/null
+++ b/sysdeps/arm/fpu/fesetround.c
@@ -0,0 +1,27 @@
+/* Set current rounding direction.
+   Copyright (C) 1997, 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv.h>
+
+int
+fesetround (int round)
+{
+  /* We only support FE_TONEAREST, so there is no need for any work.  */
+  return (round == FE_TONEAREST)?1:0;
+}

diff --git a/sysdeps/arm/fpu/fraiseexcpt.c b/sysdeps/arm/fpu/fraiseexcpt.c
new file mode 100644 (file)
index 0000000..0fbfb16
--- /dev/null
+++ b/sysdeps/arm/fpu/fraiseexcpt.c
@@ -0,0 +1,32 @@
+/* Raise given exceptions.
+   Copyright (C) 1997, 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+#include <math.h>
+
+void
+feraiseexcept (int excepts)
+{
+  /* Raise exceptions represented by EXPECTS.  */
+  fexcept_t temp;
+  _FPU_GETCW(temp);
+  temp |= (excepts & FE_ALL_EXCEPT);
+  _FPU_SETCW(temp);
+}

diff --git a/sysdeps/arm/fpu/fsetexcptflag.c b/sysdeps/arm/fpu/fsetexcptflag.c
new file mode 100644 (file)
index 0000000..f5c06a6
--- /dev/null
+++ b/sysdeps/arm/fpu/fsetexcptflag.c
@@ -0,0 +1,38 @@
+/* Set floating-point environment exception handling.
+   Copyright (C) 1997, 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv.h>
+#include <math.h>
+#include <fpu_control.h>
+
+void
+fesetexceptflag (const fexcept_t *flagp, int excepts)
+{
+  fexcept_t temp;
+
+  /* Get the current environment.  */
+  _FPU_GETCW(temp);
+
+  /* Set the desired exception mask.  */
+  temp &= ~((excepts & FE_ALL_EXCEPT) << FE_EXCEPT_SHIFT);
+  temp |= (*flagp & excepts & FE_ALL_EXCEPT) << FE_EXCEPT_SHIFT;
+
+  /* Save state back to the FPU.  */
+  _FPU_SETCW(temp);
+}

diff --git a/sysdeps/arm/fpu/ftestexcept.c b/sysdeps/arm/fpu/ftestexcept.c
new file mode 100644 (file)
index 0000000..691d3e1
--- /dev/null
+++ b/sysdeps/arm/fpu/ftestexcept.c
@@ -0,0 +1,32 @@
+/* Test exception in current environment.
+   Copyright (C) 1997, 1998 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 Library General Public License as
+   published by the Free Software Foundation; either version 2 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include <fenv.h>
+#include <fpu_control.h>
+
+int
+fetestexcept (int excepts)
+{
+  fexcept_t temp;
+
+  /* Get current exceptions.  */
+  _FPU_GETCW(temp);
+
+  return temp & excepts & FE_ALL_EXCEPT;
+}