diff options
Diffstat (limited to 'sysdeps/x86_64/fpu/bits')
| -rw-r--r-- | sysdeps/x86_64/fpu/bits/fenv.h | 93 | ||||
| -rw-r--r-- | sysdeps/x86_64/fpu/bits/mathdef.h | 39 |
2 files changed, 132 insertions, 0 deletions
diff --git a/sysdeps/x86_64/fpu/bits/fenv.h b/sysdeps/x86_64/fpu/bits/fenv.h new file mode 100644 index 0000000000..04576933f5 --- /dev/null +++ b/sysdeps/x86_64/fpu/bits/fenv.h @@ -0,0 +1,93 @@ +/* Copyright (C) 1997,1998,1999,2000,2001 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 bits representing the exception. We use the bit positions + of the appropriate bits in the FPU control word. */ +enum + { + FE_INVALID = 0x01, +#define FE_INVALID FE_INVALID + __FE_DENORM = 0x02, + FE_DIVBYZERO = 0x04, +#define FE_DIVBYZERO FE_DIVBYZERO + FE_OVERFLOW = 0x08, +#define FE_OVERFLOW FE_OVERFLOW + FE_UNDERFLOW = 0x10, +#define FE_UNDERFLOW FE_UNDERFLOW + FE_INEXACT = 0x20 +#define FE_INEXACT 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 = 0, +#define FE_TONEAREST FE_TONEAREST + FE_DOWNWARD = 0x400, +#define FE_DOWNWARD FE_DOWNWARD + FE_UPWARD = 0x800, +#define FE_UPWARD FE_UPWARD + FE_TOWARDZERO = 0xc00 +#define FE_TOWARDZERO 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 __unused1; + unsigned short int __status_word; + unsigned short int __unused2; + unsigned short int __tags; + unsigned short int __unused3; + unsigned int __eip; + unsigned short int __cs_selector; + unsigned int __opcode:11; + unsigned int __unused4:5; + unsigned int __data_offset; + unsigned short int __data_selector; + unsigned short int __unused5; + unsigned int __mxcsr; + } +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 diff --git a/sysdeps/x86_64/fpu/bits/mathdef.h b/sysdeps/x86_64/fpu/bits/mathdef.h new file mode 100644 index 0000000000..4131d86565 --- /dev/null +++ b/sysdeps/x86_64/fpu/bits/mathdef.h @@ -0,0 +1,39 @@ +/* Copyright (C) 2001 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. */ + +#if !defined _MATH_H && !defined _COMPLEX_H +# error "Never use <bits/mathdef.h> directly; include <math.h> instead" +#endif + +#if defined __USE_ISOC99 && defined _MATH_H && !defined _MATH_H_MATHDEF +# define _MATH_H_MATHDEF 1 + +/* The x86-64 architecture computes values with the precission of the + used type. */ +typedef float float_t; /* `float' expressions are evaluated as `float'. */ +typedef double double_t; /* `double' expressions are evaluated + as `double'. */ + +/* Define `INFINITY' as value of type `float'. */ +# define INFINITY HUGE_VALF + +/* The values returned by `ilogb' for 0 and NaN respectively. */ +# define FP_ILOGB0 (-2147483647 - 1) +# define FP_ILOGBNAN (-2147483647 - 1) + +#endif /* ISO C99 */ |