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authorJoseph Myers <joseph@codesourcery.com>2012-07-01 13:08:59 +0000
committerJoseph Myers <joseph@codesourcery.com>2012-07-01 13:08:59 +0000
commite84eabb3871c9b39e59323bf3f6b98c2ca9d1cd0 (patch)
treedff3f1b79454b518d15a7b9bbedeb57ff156bbe8 /ports/sysdeps/hppa/fpu/bits/fenv.h
parent75f0d3040a2c2de8842bfa7a09e11da1a73e17d0 (diff)
parente64ac02c24b43659048622714afdc92fedf561fa (diff)
downloadglibc-2.16.90.tar.gz
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Merge glibc-ports into ports/ directory. glibc-2.16.90 glibc-2.16-ports-merge
Diffstat (limited to 'ports/sysdeps/hppa/fpu/bits/fenv.h')
-rw-r--r--ports/sysdeps/hppa/fpu/bits/fenv.h82
1 files changed, 82 insertions, 0 deletions
diff --git a/ports/sysdeps/hppa/fpu/bits/fenv.h b/ports/sysdeps/hppa/fpu/bits/fenv.h
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+/* 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#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. The exception registers are never saved/stored by
+   userspace. This structure is also not correctly aligned ever, in
+   an ABI error we left out __aligned(8) and subsequently all of our
+   fenv functions must accept unaligned input, align the input, and
+   then use assembly to store fr0. This is a performance hit, but 
+   means the ABI is stable. */
+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