From: Ulrich Drepper <drepper@redhat.com>
Date: Sun, 15 Oct 2000 03:34:49 +0000 (+0000)
Subject: Linux/HPPA specific feholdexcept implementation.
X-Git-Tag: glibc-2.16-ports-before-merge~2166
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=1f8d3bd8e7c7ca6999cecec0d203f089b6457bde;p=thirdparty%2Fglibc.git

Linux/HPPA specific feholdexcept implementation.
---

diff --git a/sysdeps/hppa/fpu/feholdexcpt.c b/sysdeps/hppa/fpu/feholdexcpt.c
new file mode 100644
index 00000000000..10621786eb4
--- /dev/null
+++ b/sysdeps/hppa/fpu/feholdexcpt.c
@@ -0,0 +1,60 @@
+/* Store current floating-point environment and clear exceptions.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David Huggins-Daines <dhd@debian.org>, 2000
+
+   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 <string.h>
+
+int
+feholdexcept (fenv_t *envp)
+{
+  fenv_t clear;
+
+  /* Store the environment.  */
+  {
+    fenv_t * _regs = envp;
+    __asm__ (
+	     "fstd %%fr0,0(%2)\n"
+	     "fstd,ma %%fr1,8(%2)\n"
+	     "fstd,ma %%fr2,8(%2)\n"
+	     "fstd %%fr3,0(%2)\n"
+	     : "=m" (*_regs), "=r" (_regs) : "1" (_regs));
+    memcpy (&clear, envp, sizeof (clear));
+  }
+
+  /* Now clear all exceptions.  */
+  clear.__status_word &= ~(FE_ALL_EXCEPT << 27);
+  memset (clear.__exception, 0, sizeof (clear.__exception));
+
+  /* And set all exceptions to non-stop.  */
+  clear.__status_word &= ~FE_ALL_EXCEPT;
+
+  /* Load the new environment. */
+  {
+    fenv_t * _regs = &clear + 1;
+    __asm__ (
+	     "fldd,mb -8(%2),%%fr3\n"
+	     "fldd,mb -8(%2),%%fr2\n"
+	     "fldd,mb -8(%2),%%fr1\n"
+	     "fldd -8(%2),%%fr0\n"
+	     : "=m" (*_regs), "=r" (_regs) : "1" (_regs));
+  }
+
+  return 0;
+}