1 files changed, 43 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/i386/setfpucw.c b/sysdeps/unix/sysv/linux/i386/setfpucw.c
new file mode 100644
index 0000000000..329573df6a
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/i386/setfpucw.c
@@ -0,0 +1,43 @@
+/* Copyright (C) 1993 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Contributed by Olaf Flebbe.
+
+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 <fpu_control.h>
+
+void
+__setfpucw (fpu_control)
+     unsigned short fpu_control;
+{
+  volatile unsigned short cw;
+
+  /* If user supplied _fpu_control, use it ! */
+  if (!fpu_control)
+  { 
+    /* use linux defaults */
+    fpu_control = _FPU_DEFAULT;
+  }
+  /* Get Control Word */
+  __asm__ volatile ("fnstcw %0" : "=m" (cw) : );
+  
+  /* mask in */
+  cw &= _FPU_RESERVED;
+  cw = cw | (fpu_control & ~_FPU_RESERVED);
+
+  /* set cw */
+  __asm__ volatile ("fldcw %0" :: "m" (cw));
+}