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Diffstat (limited to 'sysdeps/x86/fpu/bits/fenv.h')
| -rw-r--r-- | sysdeps/x86/fpu/bits/fenv.h | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/sysdeps/x86/fpu/bits/fenv.h b/sysdeps/x86/fpu/bits/fenv.h deleted file mode 100644 index fd7327902c..0000000000 --- a/sysdeps/x86/fpu/bits/fenv.h +++ /dev/null @@ -1,168 +0,0 @@ -/* Copyright (C) 1997-2017 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 - -/* Define bits representing the exception. We use the bit positions - of the appropriate bits in the FPU control word. */ -enum - { - FE_INVALID = -#define FE_INVALID 0x01 - FE_INVALID, - __FE_DENORM = 0x02, - FE_DIVBYZERO = -#define FE_DIVBYZERO 0x04 - FE_DIVBYZERO, - FE_OVERFLOW = -#define FE_OVERFLOW 0x08 - FE_OVERFLOW, - FE_UNDERFLOW = -#define FE_UNDERFLOW 0x10 - FE_UNDERFLOW, - FE_INEXACT = -#define FE_INEXACT 0x20 - FE_INEXACT - }; - -#define FE_ALL_EXCEPT \ - (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) - -/* The ix87 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 - FE_TONEAREST, - FE_DOWNWARD = -#define FE_DOWNWARD 0x400 - FE_DOWNWARD, - FE_UPWARD = -#define FE_UPWARD 0x800 - FE_UPWARD, - FE_TOWARDZERO = -#define FE_TOWARDZERO 0xc00 - FE_TOWARDZERO - }; - - -/* Type representing exception flags. */ -typedef unsigned short int fexcept_t; - - -/* Type representing floating-point environment. This structure - corresponds to the layout of the block written by the `fstenv' - instruction and has additional fields for the contents of the MXCSR - register as written by the `stmxcsr' instruction. */ -typedef struct - { - unsigned short int __control_word; - unsigned short int __glibc_reserved1; - unsigned short int __status_word; - unsigned short int __glibc_reserved2; - unsigned short int __tags; - unsigned short int __glibc_reserved3; - unsigned int __eip; - unsigned short int __cs_selector; - unsigned int __opcode:11; - unsigned int __glibc_reserved4:5; - unsigned int __data_offset; - unsigned short int __data_selector; - unsigned short int __glibc_reserved5; -#ifdef __x86_64__ - unsigned int __mxcsr; -#endif - } -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 - -#if __GLIBC_USE (IEC_60559_BFP_EXT) -/* Type representing floating-point control modes. */ -typedef struct - { - unsigned short int __control_word; - unsigned short int __glibc_reserved; - unsigned int __mxcsr; - } -femode_t; - -/* Default floating-point control modes. */ -# define FE_DFL_MODE ((const femode_t *) -1L) -#endif - - -#ifdef __USE_EXTERN_INLINES -__BEGIN_DECLS - -/* Optimized versions. */ -extern int __REDIRECT_NTH (__feraiseexcept_renamed, (int), feraiseexcept); -__extern_always_inline void -__NTH (__feraiseexcept_invalid_divbyzero (int __excepts)) -{ - if ((FE_INVALID & __excepts) != 0) - { - /* One example of an invalid operation is 0.0 / 0.0. */ - float __f = 0.0; - -# ifdef __SSE_MATH__ - __asm__ __volatile__ ("divss %0, %0 " : : "x" (__f)); -# else - __asm__ __volatile__ ("fdiv %%st, %%st(0); fwait" - : "=t" (__f) : "0" (__f)); -# endif - (void) &__f; - } - if ((FE_DIVBYZERO & __excepts) != 0) - { - float __f = 1.0; - float __g = 0.0; - -# ifdef __SSE_MATH__ - __asm__ __volatile__ ("divss %1, %0" : : "x" (__f), "x" (__g)); -# else - __asm__ __volatile__ ("fdivp %%st, %%st(1); fwait" - : "=t" (__f) : "0" (__f), "u" (__g) : "st(1)"); -# endif - (void) &__f; - } -} -__extern_inline int -__NTH (feraiseexcept (int __excepts)) -{ - if (__builtin_constant_p (__excepts) - && (__excepts & ~(FE_INVALID | FE_DIVBYZERO)) == 0) - { - __feraiseexcept_invalid_divbyzero (__excepts); - return 0; - } - - return __feraiseexcept_renamed (__excepts); -} - -__END_DECLS -#endif |