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Diffstat (limited to 'REORG.TODO/sysdeps/hppa/fpu/bits/fenv.h')
-rw-r--r-- | REORG.TODO/sysdeps/hppa/fpu/bits/fenv.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/hppa/fpu/bits/fenv.h b/REORG.TODO/sysdeps/hppa/fpu/bits/fenv.h new file mode 100644 index 0000000000..72e06213fa --- /dev/null +++ b/REORG.TODO/sysdeps/hppa/fpu/bits/fenv.h @@ -0,0 +1,99 @@ +/* Copyright (C) 2000-2017 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 = +#define FE_INVALID (1<<4) /* V */ + FE_INVALID, + FE_DIVBYZERO = +#define FE_DIVBYZERO (1<<3) /* Z */ + FE_DIVBYZERO, + FE_OVERFLOW = +#define FE_OVERFLOW (1<<2) /* O */ + FE_OVERFLOW, + FE_UNDERFLOW = +#define FE_UNDERFLOW (1<<1) /* U */ + FE_UNDERFLOW, + FE_INEXACT = +#define FE_INEXACT (1<<0) /* I */ + 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 = +#define FE_TONEAREST (0 << 9) + FE_TONEAREST, + FE_TOWARDZERO = +#define FE_TOWARDZERO (1 << 9) + FE_TOWARDZERO, + FE_UPWARD = +#define FE_UPWARD (2 << 9) + FE_UPWARD, + FE_DOWNWARD = +#define FE_DOWNWARD (3 << 9) + 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 ((const fenv_t *) -1) + +#ifdef __USE_GNU +/* Floating-point environment where none of the exceptions are masked. */ +# define FE_NOMASK_ENV ((const fenv_t *) -2) +#endif + +#if __GLIBC_USE (IEC_60559_BFP_EXT) +/* Type representing floating-point control modes. */ +typedef unsigned int femode_t; + +/* Default floating-point control modes. */ +# define FE_DFL_MODE ((const femode_t *) -1L) +#endif |