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Diffstat (limited to 'sysdeps/alpha/fpu/bits/fenv.h')
| -rw-r--r-- | sysdeps/alpha/fpu/bits/fenv.h | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/sysdeps/alpha/fpu/bits/fenv.h b/sysdeps/alpha/fpu/bits/fenv.h deleted file mode 100644 index a9e89b498e..0000000000 --- a/sysdeps/alpha/fpu/bits/fenv.h +++ /dev/null @@ -1,123 +0,0 @@ -/* Copyright (C) 1997, 1998, 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 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, 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 - - -/* Define the bits representing the exception. - - Note that these are the bit positions as defined by the OSF/1 - ieee_{get,set}_control_word interface and not by the hardware fpcr. - - See the Alpha Architecture Handbook section 4.7.7.3 for details, - but in summary, trap shadows mean the hardware register can acquire - extra exception bits so for proper IEEE support the tracking has to - be done in software -- in this case with kernel support. - - As to why the system call interface isn't in the same format as - the hardware register, only those crazy folks at DEC can tell you. */ - -enum - { -#ifdef __USE_GNU - FE_DENORMAL = 1UL << 22, -#define FE_DENORMAL FE_DENORMAL -#endif - - FE_INEXACT = 1UL << 21, -#define FE_INEXACT FE_INEXACT - - FE_UNDERFLOW = 1UL << 20, -#define FE_UNDERFLOW FE_UNDERFLOW - - FE_OVERFLOW = 1UL << 19, -#define FE_OVERFLOW FE_OVERFLOW - - FE_DIVBYZERO = 1UL << 18, -#define FE_DIVBYZERO FE_DIVBYZERO - - FE_INVALID = 1UL << 17, -#define FE_INVALID FE_INVALID - - FE_ALL_EXCEPT = 0x3f << 17 -#define FE_ALL_EXCEPT FE_ALL_EXCEPT - }; - -/* Alpha chips support all four defined rouding modes. - - Note that code must be compiled to use dynamic rounding (/d) instructions - to see these changes. For gcc this is -mfp-rounding-mode=d; for DEC cc - this is -fprm d. The default for both is static rounding to nearest. - - These are shifted down 58 bits from the hardware fpcr because the - functions are declared to take integers. */ - -enum - { - FE_TOWARDZERO = 0, -#define FE_TOWARDZERO FE_TOWARDZERO - - FE_DOWNWARD = 1, -#define FE_DOWNWARD FE_DOWNWARD - - FE_TONEAREST = 2, -#define FE_TONEAREST FE_TONEAREST - - FE_UPWARD = 3, -#define FE_UPWARD FE_UPWARD - }; - -#ifdef __USE_GNU -/* On later hardware, and later kernels for earlier hardware, we can forcibly - underflow denormal inputs and outputs. This can speed up certain programs - significantly, usually without affecting accuracy. */ -enum - { - FE_MAP_DMZ = 1UL << 12, /* Map denorm inputs to zero */ -#define FE_MAP_DMZ FE_MAP_DMZ - - FE_MAP_UMZ = 1UL << 13, /* Map underflowed outputs to zero */ -#define FE_MAP_UMZ FE_MAP_UMZ - }; -#endif - -/* 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. Note that due to - architecture-specified page mappings, no user-space pointer will ever - have its two high bits set. Co-opt one. */ -#define FE_DFL_ENV ((__const fenv_t *) 0x8800000000000000UL) - -#ifdef __USE_GNU -/* Floating-point environment where none of the exceptions are masked. */ -# define FE_NOMASK_ENV ((__const fenv_t *) 0x880000000000003eUL) - -/* Floating-point environment with (processor-dependent) non-IEEE floating - point. In this case, mapping denormals to zero. */ -# define FE_NONIEEE_ENV ((__const fenv_t *) 0x8800000000003000UL) -#endif - -/* The system calls to talk to the kernel's FP code. */ -extern unsigned long int __ieee_get_fp_control (void) __THROW; -extern void __ieee_set_fp_control (unsigned long int __value) __THROW; |