about summary refs log tree commit diff
path: root/sysdeps/generic/fpu_control.h
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/generic/fpu_control.h')
-rw-r--r--sysdeps/generic/fpu_control.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/sysdeps/generic/fpu_control.h b/sysdeps/generic/fpu_control.h
new file mode 100644
index 0000000000..e91638d008
--- /dev/null
+++ b/sysdeps/generic/fpu_control.h
@@ -0,0 +1,46 @@
+/* FPU control word definitions.  Stub version.
+   Copyright (C) 1996, 1997 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.  */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+#define _FPU_RESERVED ???	/* These bits are reserved are not changed.  */
+
+/* The fdlibm code requires no interrupts for exceptions.  Don't
+   change the rounding mode, it would break long double I/O!  */
+#define _FPU_DEFAULT  0x00000000 /* Default value.  */
+
+/* Type of the control word.  */
+typedef unsigned int fpu_control_t __attribute__ ((__mode__ (__?I__)));
+
+/* Macros for accessing the hardware control word.  */
+#define _FPU_GETCW(cw) __asm__ ("fetch fpu control word into %0" : "=g" (cw))
+#define _FPU_SETCW(cw) __asm__ ("set fpu control word to %0" : : "g" (cw))
+
+/* Default control word set at startup.  */
+extern fpu_control_t __fpu_control;
+
+__BEGIN_DECLS
+
+/* Called at startup.  It can be used to manipulate fpu control register.  */
+extern void __setfpucw __P ((fpu_control_t));
+
+__END_DECLS
+
+#endif /* _FPU_CONTROL_H */