| /* Copyright (C) 1997-2014 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 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 |
| |
| #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 = |
| #define FE_INVALID (1 << 9) |
| FE_INVALID, |
| FE_OVERFLOW = |
| #define FE_OVERFLOW (1 << 8) |
| FE_OVERFLOW, |
| FE_UNDERFLOW = |
| #define FE_UNDERFLOW (1 << 7) |
| FE_UNDERFLOW, |
| FE_DIVBYZERO = |
| #define FE_DIVBYZERO (1 << 6) |
| FE_DIVBYZERO, |
| FE_INEXACT = |
| #define FE_INEXACT (1 << 5) |
| 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 = |
| #define FE_TONEAREST (0 << 30) |
| FE_TONEAREST, |
| FE_TOWARDZERO = |
| #define FE_TOWARDZERO (1 << 30) |
| FE_TOWARDZERO, |
| FE_UPWARD = |
| #define FE_UPWARD (-0x7fffffff - 1) /* (2 << 30) */ |
| FE_UPWARD, |
| FE_DOWNWARD = |
| #define FE_DOWNWARD (-0x40000000) /* (3 << 30) */ |
| 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 ((const fenv_t *) -1) |
| |
| #ifdef __USE_GNU |
| /* Floating-point environment where none of the exception is masked. */ |
| # define FE_NOMASK_ENV ((const fenv_t *) -2) |
| #endif |
| |
| /* For internal use only: access the fp state register. */ |
| #if __WORDSIZE == 64 |
| # define __fenv_stfsr(X) __asm__ __volatile__ ("stx %%fsr,%0" : "=m" (X)) |
| # define __fenv_ldfsr(X) __asm__ __volatile__ ("ldx %0,%%fsr" : : "m" (X)) |
| #else |
| # define __fenv_stfsr(X) __asm__ __volatile__ ("st %%fsr,%0" : "=m" (X)) |
| # define __fenv_ldfsr(X) __asm__ __volatile__ ("ld %0,%%fsr" : : "m" (X)) |
| #endif |