about summary refs log tree commit diff
path: root/sysdeps/arm/fpu_control.h
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/arm/fpu_control.h')
-rw-r--r--sysdeps/arm/fpu_control.h48
1 files changed, 48 insertions, 0 deletions
diff --git a/sysdeps/arm/fpu_control.h b/sysdeps/arm/fpu_control.h
new file mode 100644
index 0000000000..6a4a4bb0f0
--- /dev/null
+++ b/sysdeps/arm/fpu_control.h
@@ -0,0 +1,48 @@
+/* FPU control word definitions.  Stub version.
+Copyright (C) 1996 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., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#ifndef _FPU_CONTROL_H
+#define _FPU_CONTROL_H
+
+#define _FPU_RESERVED 0xffffffff  /* These bits are reserved.  */
+
+/* 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;
+
+/* Macros for accessing the hardware control word.
+ * On the ARM, we can't do this from user mode (it would trap). 
+ */
+#define _FPU_GETCW(cw) __asm__ ("movnv r0,r0" : "=g" (cw))
+#define _FPU_SETCW(cw) __asm__ ("movnv r0,r0" : : "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 */