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Diffstat (limited to 'libc/sysdeps/linux/sparc/bits/fenv.h')
-rw-r--r--libc/sysdeps/linux/sparc/bits/fenv.h85
1 files changed, 85 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/sparc/bits/fenv.h b/libc/sysdeps/linux/sparc/bits/fenv.h
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+++ b/libc/sysdeps/linux/sparc/bits/fenv.h
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+/* Copyright (C) 1997, 1998, 1999 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
+
+#include <bits/wordsize.h>
+
+
+/* Define bits representing the exception. We use the bit positions
+ of the appropriate accrued exception bits from the FSR. */
+enum
+ {
+ FE_INVALID = (1 << 9),
+#define FE_INVALID FE_INVALID
+ FE_OVERFLOW = (1 << 8),
+#define FE_OVERFLOW FE_OVERFLOW
+ FE_UNDERFLOW = (1 << 7),
+#define FE_UNDERFLOW FE_UNDERFLOW
+ FE_DIVBYZERO = (1 << 6),
+#define FE_DIVBYZERO FE_DIVBYZERO
+ FE_INEXACT = (1 << 5)
+#define FE_INEXACT FE_INEXACT
+ };
+
+#define FE_ALL_EXCEPT \
+ (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)
+
+/* The Sparc 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 = (0U << 30),
+#define FE_TONEAREST FE_TONEAREST
+ FE_TOWARDZERO = (1U << 30),
+#define FE_TOWARDZERO FE_TOWARDZERO
+ FE_UPWARD = (2U << 30),
+#define FE_UPWARD FE_UPWARD
+ FE_DOWNWARD = (3U << 30)
+#define FE_DOWNWARD FE_DOWNWARD
+ };
+
+#define __FE_ROUND_MASK (3U << 30)
+
+
+/* Type representing exception flags. */
+typedef unsigned long int fexcept_t;
+
+
+/* Type representing floating-point environment. */
+typedef unsigned long int 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
+
+/* For internal use only: access the fp state register. */
+#if __WORDSIZE == 64
+# define __fenv_stfsr(X) __asm__ ("stx %%fsr,%0" : "=m" (X))
+# define __fenv_ldfsr(X) __asm__ __volatile__ ("ldx %0,%%fsr" : : "m" (X))
+#else
+# define __fenv_stfsr(X) __asm__ ("st %%fsr,%0" : "=m" (X))
+# define __fenv_ldfsr(X) __asm__ __volatile__ ("ld %0,%%fsr" : : "m" (X))
+#endif