summaryrefslogtreecommitdiff
path: root/libc/sysdeps/linux/arm/bits/fenv.h
diff options
context:
space:
mode:
Diffstat (limited to 'libc/sysdeps/linux/arm/bits/fenv.h')
-rw-r--r--libc/sysdeps/linux/arm/bits/fenv.h58
1 files changed, 58 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/arm/bits/fenv.h b/libc/sysdeps/linux/arm/bits/fenv.h
new file mode 100644
index 000000000..7bd242385
--- /dev/null
+++ b/libc/sysdeps/linux/arm/bits/fenv.h
@@ -0,0 +1,58 @@
+/* Copyright (C) 1997, 1998, 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. */
+
+#ifndef _FENV_H
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+/* Define bits representing exceptions in the FPU status word. */
+enum
+ {
+ FE_INVALID = 1,
+#define FE_INVALID FE_INVALID
+ FE_DIVBYZERO = 2,
+#define FE_DIVBYZERO FE_DIVBYZERO
+ FE_OVERFLOW = 4,
+#define FE_OVERFLOW FE_OVERFLOW
+ FE_UNDERFLOW = 8,
+#define FE_UNDERFLOW FE_UNDERFLOW
+ };
+
+/* Amount to shift by to convert an exception to a mask bit. */
+#define FE_EXCEPT_SHIFT 16
+
+/* All supported exceptions. */
+#define FE_ALL_EXCEPT \
+ (FE_INVALID | FE_DIVBYZERO | FE_OVERFLOW | FE_UNDERFLOW)
+
+/* The ARM FPU basically only supports round-to-nearest. Other rounding
+ modes exist, but you have to encode them in the actual instruction. */
+#define FE_TONEAREST 0
+
+/* Type representing exception flags. */
+typedef unsigned long int fexcept_t;
+
+/* Type representing floating-point environment. */
+typedef struct
+ {
+ unsigned long int __cw;
+ }
+fenv_t;
+
+/* If the default argument is used we use this value. */
+#define FE_DFL_ENV ((fenv_t *) -1l)