aboutsummaryrefslogtreecommitdiff
path: root/math/setfpucw.c
diff options
context:
space:
mode:
Diffstat (limited to 'math/setfpucw.c')
-rw-r--r--math/setfpucw.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/math/setfpucw.c b/math/setfpucw.c
new file mode 100644
index 0000000..cb50f9f
--- /dev/null
+++ b/math/setfpucw.c
@@ -0,0 +1,37 @@
+/* Set the FPU control word.
+ Copyright (C) 1996, 1997, 1999 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <math.h>
+#include <fpu_control.h>
+
+void
+__setfpucw (fpu_control_t set)
+{
+ fpu_control_t cw;
+
+ /* Fetch the current control word. */
+ _FPU_GETCW (cw);
+
+ /* Preserve the reserved bits, and set the rest as the user
+ specified (or the default, if the user gave zero). */
+ cw &= _FPU_RESERVED;
+ cw |= set & ~_FPU_RESERVED;
+
+ _FPU_SETCW (cw);
+}