summaryrefslogtreecommitdiff
path: root/sysdeps/hppa/fpu/bits/fenv.h
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/hppa/fpu/bits/fenv.h')
-rw-r--r--sysdeps/hppa/fpu/bits/fenv.h78
1 files changed, 78 insertions, 0 deletions
diff --git a/sysdeps/hppa/fpu/bits/fenv.h b/sysdeps/hppa/fpu/bits/fenv.h
new file mode 100644
index 0000000000..c5f8c43459
--- /dev/null
+++ b/sysdeps/hppa/fpu/bits/fenv.h
@@ -0,0 +1,78 @@
+/* Copyright (C) 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by David Huggins-Daines <dhd@debian.org>
+
+ 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 the exception. We use the values of the
+ appropriate enable bits in the FPU status word (which,
+ coincidentally, are the same as the flag bits, but shifted right by
+ 27 bits). */
+enum
+{
+ FE_INVALID = 1<<4, /* V */
+#define FE_INVALID FE_INVALID
+ FE_DIVBYZERO = 1<<3, /* Z */
+#define FE_DIVBYZERO FE_DIVBYZERO
+ FE_OVERFLOW = 1<<2, /* O */
+#define FE_OVERFLOW FE_OVERFLOW
+ FE_UNDERFLOW = 1<<1, /* U */
+#define FE_UNDERFLOW FE_UNDERFLOW
+ FE_INEXACT = 1<<0, /* I */
+#define FE_INEXACT FE_INEXACT
+};
+
+#define FE_ALL_EXCEPT \
+ (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
+
+/* The PA-RISC FPU supports all of the four defined rounding modes.
+ We use the values of the RM field in the floating point status
+ register for the appropriate macros. */
+enum
+ {
+ FE_TONEAREST = 0 << 9,
+#define FE_TONEAREST FE_TONEAREST
+ FE_TOWARDZERO = 1 << 9,
+#define FE_TOWARDZERO FE_TOWARDZERO
+ FE_UPWARD = 2 << 9,
+#define FE_UPWARD FE_UPWARD
+ FE_DOWNWARD = 3 << 9,
+#define FE_DOWNWARD FE_DOWNWARD
+ };
+
+/* Type representing exception flags. */
+typedef unsigned int fexcept_t;
+
+/* Type representing floating-point environment. This structure
+ corresponds to the layout of the status and exception words in the
+ register file. */
+typedef struct
+{
+ unsigned int __status_word;
+ unsigned int __exception[7];
+} fenv_t;
+
+/* If the default argument is used we use this value. */
+#define FE_DFL_ENV ((fenv_t *) -1)
+
+#ifdef __USE_GNU
+/* Floating-point environment where none of the exceptions are masked. */
+# define FE_NOMASK_ENV ((fenv_t *) -2)
+#endif