Floating point exception definitions.

diff --git a/sysdeps/arm/bits/fenv.h b/sysdeps/arm/bits/fenv.h
new file mode 100644 (file)
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+++ b/sysdeps/arm/bits/fenv.h
@@ -0,0 +1,90 @@
+/* Copyright (C) 1997, 1998 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 _FENV_H
+# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
+#endif
+
+
+/* Define bits representing the exception.  We use the bit positions
+   of the appropriate bits in the FPU control word.  */
+enum
+  {
+    FE_INVALID = 0x01,
+#define FE_INVALID     FE_INVALID
+    __FE_DENORM = 0x02,
+    FE_DIVBYZERO = 0x04,
+#define FE_DIVBYZERO   FE_DIVBYZERO
+    FE_OVERFLOW = 0x08,
+#define FE_OVERFLOW    FE_OVERFLOW
+    FE_UNDERFLOW = 0x10,
+#define FE_UNDERFLOW   FE_UNDERFLOW
+    FE_INEXACT = 0x20
+#define FE_INEXACT     FE_INEXACT
+  };
+
+#define FE_ALL_EXCEPT \
+       (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
+
+/* The ARM FPU supports all of the four defined rounding modes.  We
+   use again the bit positions in the FPU control word as the values
+   for the appropriate macros.  */
+enum
+  {
+    FE_TONEAREST = 0,
+#define FE_TONEAREST   FE_TONEAREST
+    FE_DOWNWARD = 0x400,
+#define FE_DOWNWARD    FE_DOWNWARD
+    FE_UPWARD = 0x800,
+#define FE_UPWARD      FE_UPWARD
+    FE_TOWARDSZERO = 0xc00
+#define FE_TOWARDSZERO FE_TOWARDSZERO
+  };
+
+
+/* Type representing exception flags.  */
+typedef unsigned short int fexcept_t;
+
+
+/* Type representing floating-point environment.  This function corresponds
+   to the layout of the block written by the `fstenv'.  */
+typedef struct
+  {
+    unsigned short int control_word;
+    unsigned short int __unused1;
+    unsigned short int status_word;
+    unsigned short int __unused2;
+    unsigned short int tags;
+    unsigned short int __unused3;
+    unsigned int eip;
+    unsigned short int cs_selector;
+    unsigned int opcode:11;
+    unsigned int __unused4:5;
+    unsigned int data_offset;
+    unsigned short int data_selector;
+    unsigned short int __unused5;
+  }
+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 exception is masked.  */
+# define FE_NOMASK_ENV ((fenv_t *) -2)
+#endif