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Diffstat (limited to 'libc/sysdeps/linux/sh/bits/fenv.h')
-rw-r--r--libc/sysdeps/linux/sh/bits/fenv.h81
1 files changed, 46 insertions, 35 deletions
diff --git a/libc/sysdeps/linux/sh/bits/fenv.h b/libc/sysdeps/linux/sh/bits/fenv.h
index b192d9433..cbbad92e1 100644
--- a/libc/sysdeps/linux/sh/bits/fenv.h
+++ b/libc/sysdeps/linux/sh/bits/fenv.h
@@ -1,61 +1,72 @@
-/* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+/* Copyright (C) 1999, 2000 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.
+ 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
- Library General Public License for more details.
+ Lesser 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. */
+ 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
-/* Here should be the exception be defined:
- FE_INVALID
- FE_DIVBYZERO
- FE_OVERFLOW
- FE_UNDERFLOW
- FE_INEXACT
- We define no macro which signals no exception is supported. */
-
-#define FE_ALL_EXCEPT 0
+/* Define bits representing the exception. We use the bit positions
+ of the appropriate bits in the FPU control word. */
+enum
+ {
+ FE_INEXACT = 0x04,
+#define FE_INEXACT FE_INEXACT
+ FE_UNDERFLOW = 0x08,
+#define FE_UNDERFLOW FE_UNDERFLOW
+ FE_OVERFLOW = 0x10,
+#define FE_OVERFLOW FE_OVERFLOW
+ FE_DIVBYZERO = 0x20,
+#define FE_DIVBYZERO FE_DIVBYZERO
+ FE_INVALID = 0x40,
+#define FE_INVALID FE_INVALID
+ };
+#define FE_ALL_EXCEPT \
+ (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
-/* Here should the rounding modes be defined:
- FE_TONEAREST
- FE_DOWNWARD
- FE_UPWARD
- FE_TOWARDZERO
- We define no macro which signals no rounding mode is selectable. */
+/* The SH 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 = 0x0,
+#define FE_TONEAREST FE_TONEAREST
+ FE_TOWARDZERO = 0x1,
+#define FE_TOWARDZERO FE_TOWARDZERO
+ FE_UPWARD = 0x2,
+#define FE_UPWARD FE_UPWARD
+ FE_DOWNWARD = 0x3
+#define FE_DOWNWARD FE_DOWNWARD
+ };
-/* Type representing exception flags.
- XXX Probably we should also include the signal handler here. */
-typedef struct
- {
- unsigned int __flags;
- }
-fexcept_t;
+/* Type representing exception flags. */
+typedef unsigned short int fexcept_t;
-/* Type representing floating-point environment. */
+/* Type representing floating-point environment. This function corresponds
+ to the layout of the block written by the `fstenv'. */
typedef struct
{
- fexcept_t __excepts;
- /* XXX I don't know what else we should save. */
+ unsigned int __fpscr;
}
fenv_t;
/* If the default argument is used we use this value. */
-#define FE_DFL_ENV ((fenv_t *) -1l)
+#define FE_DFL_ENV ((fenv_t *) -1)