sync fenv.h with glibc

1 files changed, 78 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/hppa/bits/fenv.h b/libc/sysdeps/linux/hppa/bits/fenv.h
new file mode 100644
index 000000000..c5f8c4345
--- /dev/null
+++ b/libc/sysdeps/linux/hppa/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