diff options
Diffstat (limited to 'sysdeps/i386/fpu')
| -rw-r--r-- | sysdeps/i386/fpu/fclrexcpt.c | 40 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/fegetenv.c | 27 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/fegetround.c | 31 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/feholdexcpt.c | 36 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/fenvbits.h | 91 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/fesetenv.c | 76 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/fesetround.c | 38 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/feupdateenv.c | 39 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/fgetexcptflg.c | 32 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/fraiseexcpt.c | 75 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/fsetexcptflg.c | 40 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/ftestexcept.c | 32 | ||||
| -rw-r--r-- | sysdeps/i386/fpu/mathbits.h | 36 |
13 files changed, 593 insertions, 0 deletions
diff --git a/sysdeps/i386/fpu/fclrexcpt.c b/sysdeps/i386/fpu/fclrexcpt.c new file mode 100644 index 0000000000..0b43776f54 --- /dev/null +++ b/sysdeps/i386/fpu/fclrexcpt.c @@ -0,0 +1,40 @@ +/* Clear given exceptions in current floating-point environment. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> + +void +feclearexcept (int excepts) +{ + fenv_t temp; + + /* Mask out unsupported bits/exceptions. */ + excepts &= FE_ALL_EXCEPT; + + /* Bah, we have to clear selected exceptions. Since there is no + `fldsw' instruction we have to do it the hard way. */ + __asm__ ("fnstenv %0" : "=m" (*&temp)); + + /* Clear the relevant bits. */ + temp.status_word &= excepts ^ FE_ALL_EXCEPT; + + /* Put the new data in effect. */ + __asm__ ("fldenv %0" : : "m" (*&temp)); +} diff --git a/sysdeps/i386/fpu/fegetenv.c b/sysdeps/i386/fpu/fegetenv.c new file mode 100644 index 0000000000..452449d044 --- /dev/null +++ b/sysdeps/i386/fpu/fegetenv.c @@ -0,0 +1,27 @@ +/* Store current floating-point environment. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> + +void +fegetenv (fenv_t *envp) +{ + __asm__ ("fnstenv %0" : "=m" (*envp)); +} diff --git a/sysdeps/i386/fpu/fegetround.c b/sysdeps/i386/fpu/fegetround.c new file mode 100644 index 0000000000..4dfa32d0b5 --- /dev/null +++ b/sysdeps/i386/fpu/fegetround.c @@ -0,0 +1,31 @@ +/* Return current rounding direction. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> + +int +fegetround (void) +{ + int cw; + + __asm__ ("fnstcw %0" : "=m" (*&cw)); + + return cw & 0xc00; +} diff --git a/sysdeps/i386/fpu/feholdexcpt.c b/sysdeps/i386/fpu/feholdexcpt.c new file mode 100644 index 0000000000..c9a0f73489 --- /dev/null +++ b/sysdeps/i386/fpu/feholdexcpt.c @@ -0,0 +1,36 @@ +/* Store current floating-point environment and clear exceptions. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> + +int +feholdexcept (fenv_t *envp) +{ + unsigned short int work; + + /* Store the environment. */ + __asm__ ("fnstenv %0" : "=m" (*envp)); + + /* Now set all exceptions to non-stop. */ + work = envp->control_word | 0x3f; + __asm__ ("fldcw %0" : : "m" (*&work)); + + return 1; +} diff --git a/sysdeps/i386/fpu/fenvbits.h b/sysdeps/i386/fpu/fenvbits.h new file mode 100644 index 0000000000..bea89a15b1 --- /dev/null +++ b/sysdeps/i386/fpu/fenvbits.h @@ -0,0 +1,91 @@ +/* Copyright (C) 1997 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* This file should never be included directly. */ + +#ifndef _FENVBITS_H +#define _FENVBITS_H 1 + +/* 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_TOWARDSZERO = 0xc00 +#define FE_TOWARDSZERO FE_TOWARDSZERO + }; + + +/* Type representing exception flags. */ +typedef unsigned short int fexcept_t; + + +/* Type representing floating-point environment. This function corresponds to the layout of the block written by the `fstenv'. */ +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; + } +fenv_t; + +/* If the default argument is used we use this value. */ +#define FE_DFL_ENV ((fenv_t *) -1) + +#ifdef __USE_GNU +/* Floating-point environment where none of the exception is masked. */ +# define FE_NOMASK_ENV ((fenv_t *) -2) +#endif + +#endif /* fenvbits.h */ diff --git a/sysdeps/i386/fpu/fesetenv.c b/sysdeps/i386/fpu/fesetenv.c new file mode 100644 index 0000000000..e7300ea1e6 --- /dev/null +++ b/sysdeps/i386/fpu/fesetenv.c @@ -0,0 +1,76 @@ +/* Install given floating-point environment. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> + +#include <assert.h> + + +void +fesetenv (const fenv_t *envp) +{ + fenv_t temp; + + /* The memory block used by fstenv/fldenv has a size of 28 bytes. */ + assert (sizeof (fenv_t) == 28); + + /* Install the environment specified by ENVP. But there are a few + values which we do not want to come from the saved environment. + Therefore, we get the current environment and replace the values + we want to use from the environment specified by the parameter. */ + __asm__ ("fnstenv %0" : "=m" (*&temp)); + + if (envp == FE_DFL_ENV) + { + temp.control_word |= FE_ALL_EXCEPT; + temp.control_word &= ~FE_TOWARDSZERO; + temp.status_word &= ~FE_ALL_EXCEPT; + temp.eip = 0; + temp.cs_selector = 0; + temp.opcode = 0; + temp.data_offset = 0; + temp.data_selector = 0; + } + else if (envp == FE_NOMASK_ENV) + { + temp.control_word &= ~(FE_ALL_EXCEPT | FE_TOWARDSZERO); + temp.status_word &= ~FE_ALL_EXCEPT; + temp.eip = 0; + temp.cs_selector = 0; + temp.opcode = 0; + temp.data_offset = 0; + temp.data_selector = 0; + } + else + { + temp.control_word &= ~(FE_ALL_EXCEPT | FE_TOWARDSZERO); + temp.control_word |= (envp->control_word + & (FE_ALL_EXCEPT | FE_TOWARDSZERO)); + temp.status_word &= ~FE_ALL_EXCEPT; + temp.status_word |= envp->status_word & FE_ALL_EXCEPT; + temp.eip = envp->eip; + temp.cs_selector = envp->cs_selector; + temp.opcode = envp->opcode; + temp.data_offset = envp->data_offset; + temp.data_selector = envp->data_selector; + } + + __asm__ ("fldenv %0" : : "m" (temp)); +} diff --git a/sysdeps/i386/fpu/fesetround.c b/sysdeps/i386/fpu/fesetround.c new file mode 100644 index 0000000000..844c58663e --- /dev/null +++ b/sysdeps/i386/fpu/fesetround.c @@ -0,0 +1,38 @@ +/* Set current rounding direction. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> + +int +fesetround (int round) +{ + unsigned short int cw; + + if ((round & ~0xc00) != 0) + /* ROUND is no valid rounding mode. */ + return 0; + + __asm__ ("fnstcw %0" : "=m" (*&cw)); + cw &= ~0xc00; + cw |= round; + __asm__ ("fldcw %0" : : "m" (*&cw)); + + return 1; +} diff --git a/sysdeps/i386/fpu/feupdateenv.c b/sysdeps/i386/fpu/feupdateenv.c new file mode 100644 index 0000000000..0f7abc2344 --- /dev/null +++ b/sysdeps/i386/fpu/feupdateenv.c @@ -0,0 +1,39 @@ +/* Install given floating-point environment and raise exceptions. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> + +void +feupdateenv (const fenv_t *envp) +{ + fexcept_t temp; + + /* Save current exceptions. */ + __asm__ ("fnstsw %0" : "=m" (*&temp)); + temp &= FE_ALL_EXCEPT; + + /* Install new environment. */ + fesetenv (envp); + + /* Raise the safed exception. Incidently for us the implementation + defined format of the values in objects of type fexcept_t is the + same as the ones specified using the FE_* constants. */ + feraiseexcept ((int) temp); +} diff --git a/sysdeps/i386/fpu/fgetexcptflg.c b/sysdeps/i386/fpu/fgetexcptflg.c new file mode 100644 index 0000000000..1db3953eae --- /dev/null +++ b/sysdeps/i386/fpu/fgetexcptflg.c @@ -0,0 +1,32 @@ +/* Store current representation for exceptions. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> + +void +fegetexceptflag (fexcept_t *flagp, int excepts) +{ + fexcept_t temp; + + /* Get the current exceptions. */ + __asm__ ("fnstsw %0" : "=m" (*&temp)); + + *flagp = temp & excepts & FE_ALL_EXCEPT; +} diff --git a/sysdeps/i386/fpu/fraiseexcpt.c b/sysdeps/i386/fpu/fraiseexcpt.c new file mode 100644 index 0000000000..90e992aaec --- /dev/null +++ b/sysdeps/i386/fpu/fraiseexcpt.c @@ -0,0 +1,75 @@ +/* Raise given exceptions. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> +#include <math.h> + +void +feraiseexcept (int excepts) +{ + /* Raise exceptions represented by EXPECTS. But we must raise only + one signal at a time. It is important the if the overflow/underflow + exception and the inexact exception are given at the same time, + the overflow/underflow exception follows the inexact exception. */ + + /* First: invalid exception. */ + if ((FE_INVALID & excepts) != 0) + { + /* One example of a invalid operation is 0 * Infinity. */ + double d = 0.0 * HUGE_VAL; + (void) &d; + /* Now force the exception. */ + __asm__ ("fwait"); + } + + /* Next: division by zero. */ + if ((FE_DIVBYZERO & excepts) != 0) + { + double d; + __asm__ ("fld1; fldz; fdivp %%st, %%st(1); fwait" : "=t" (d)); + (void) &d; + } + + /* Next: overflow. */ + if ((FE_OVERFLOW & excepts) != 0) + { + long double d = LDBL_MAX * LDBL_MAX; + (void) &d; + /* Now force the exception. */ + __asm__ ("fwait"); + } + + /* Next: underflow. */ + if ((FE_UNDERFLOW & excepts) != 0) + { + long double d = LDBL_MIN / 16.0; + (void) &d; + /* Now force the exception. */ + __asm__ ("fwait"); + } + + /* Last: inexact. */ + if ((FE_INEXACT & excepts) != 0) + { + long double d; + __asm__ ("fld1; fldpi; fdivp %%st, %%st(1); fwait" : "=t" (d)); + (void) &d; + } +} diff --git a/sysdeps/i386/fpu/fsetexcptflg.c b/sysdeps/i386/fpu/fsetexcptflg.c new file mode 100644 index 0000000000..598b8d2233 --- /dev/null +++ b/sysdeps/i386/fpu/fsetexcptflg.c @@ -0,0 +1,40 @@ +/* Set floating-point environment exception handling. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> +#include <math.h> + +void +fesetexceptflag (const fexcept_t *flagp, int excepts) +{ + fenv_t temp; + + /* Get the current environment. We have to do this since we cannot + separately set the status word. */ + __asm__ ("fnstenv %0" : "=m" (*&temp)); + + temp.status_word &= ~(excepts & FE_ALL_EXCEPT); + temp.status_word |= *flagp & excepts & FE_ALL_EXCEPT; + + /* Store the new status word (along with the rest of the environment. + Possibly new exceptions are set but they won't get executed unless + the next floating-point instruction. */ + __asm__ ("fldenv %0" : : "m" (*&temp)); +} diff --git a/sysdeps/i386/fpu/ftestexcept.c b/sysdeps/i386/fpu/ftestexcept.c new file mode 100644 index 0000000000..c69170fb2c --- /dev/null +++ b/sysdeps/i386/fpu/ftestexcept.c @@ -0,0 +1,32 @@ +/* Test exception in current environment. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <fenv.h> + +int +fetestexcept (int excepts) +{ + int temp; + + /* Get current exceptions. */ + __asm__ ("fnstsw %0" : "=a" (temp)); + + return temp & excepts & FE_ALL_EXCEPT; +} diff --git a/sysdeps/i386/fpu/mathbits.h b/sysdeps/i386/fpu/mathbits.h new file mode 100644 index 0000000000..7885afeec0 --- /dev/null +++ b/sysdeps/i386/fpu/mathbits.h @@ -0,0 +1,36 @@ +/* Copyright (C) 1997 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 Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#ifndef _MATHBITS_H +#define _MATHBITS_H 1 + +/* The ix87 FPUs evaluate all values in the 80 bit floating-point format + which is also available for the user as `long double'. Therefore + we define: */ +typedef long double float_t; /* `float' expressions are evaluated as + `long double'. */ +typedef long double double_t; /* `double' expressions are evaluated as + `long double'. */ + +/* Signal that both types are `long double'. */ +#define FLT_EVAL_METHOD 2 + +/* Define `INFINITY' as value of type `float_t'. */ +#define INFINITY HUGE_VALL + +#endif /* mathbits.h */ |