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FP CW and SW handling for Arm.

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This commit is contained in:
Ulrich Drepper 1998-05-21 15:39:28 +00:00
parent 2e45c3aadd
commit c34d3ba41f
8 changed files with 256 additions and 0 deletions
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39
sysdeps/arm/fpu/fclrexcpt.c Normal file
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/* Clear given exceptions in current floating-point environment.
Copyright (C) 1997, 1998 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. */
#include <fenv.h>
#include <fpu_control.h>
void
feclearexcept (int excepts)
{
unsigned long int temp;
/* Mask out unsupported bits/exceptions. */
excepts &= FE_ALL_EXCEPT;
/* Get the current floating point status. */
_FPU_GETCW(temp);
/* Clear the relevant bits. */
temp &= excepts ^ FE_ALL_EXCEPT;
/* Put the new data in effect. */
_FPU_SETCW(temp);
}

29
sysdeps/arm/fpu/fegetenv.c Normal file
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/* Store current floating-point environment.
Copyright (C) 1997, 1998 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. */
#include <fenv.h>
#include <fpu_control.h>
void
fegetenv (fenv_t *envp)
{
unsigned long int temp;
_FPU_GETCW(temp);
envp->cw = temp;
}

26
sysdeps/arm/fpu/fegetround.c Normal file
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/* Return current rounding direction.
Copyright (C) 1997, 1998 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. */
#include <fenv.h>
int
fegetround (void)
{
return FE_TONEAREST; /* Easy. :-) */
}

33
sysdeps/arm/fpu/fesetenv.c Normal file
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/* Install given floating-point environment.
Copyright (C) 1997, 1998 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. */
#include <fenv.h>
#include <fpu_control.h>
void
fesetenv (const fenv_t *envp)
{
if (envp == FE_DFL_ENV)
_FPU_SETCW(_FPU_DEFAULT);
else
{
unsigned long temp = envp->cw;
_FPU_SETCW(temp);
}
}

27
sysdeps/arm/fpu/fesetround.c Normal file
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/* Set current rounding direction.
Copyright (C) 1997, 1998 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. */
#include <fenv.h>
int
fesetround (int round)
{
/* We only support FE_TONEAREST, so there is no need for any work. */
return (round == FE_TONEAREST)?1:0;
}

32
sysdeps/arm/fpu/fraiseexcpt.c Normal file
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/* Raise given exceptions.
Copyright (C) 1997, 1998 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. */
#include <fenv.h>
#include <fpu_control.h>
#include <math.h>
void
feraiseexcept (int excepts)
{
/* Raise exceptions represented by EXPECTS. */
fexcept_t temp;
_FPU_GETCW(temp);
temp |= (excepts & FE_ALL_EXCEPT);
_FPU_SETCW(temp);
}

38
sysdeps/arm/fpu/fsetexcptflag.c Normal file
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/* Set floating-point environment exception handling.
Copyright (C) 1997, 1998 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. */
#include <fenv.h>
#include <math.h>
#include <fpu_control.h>
void
fesetexceptflag (const fexcept_t *flagp, int excepts)
{
fexcept_t temp;
/* Get the current environment. */
_FPU_GETCW(temp);
/* Set the desired exception mask. */
temp &= ~((excepts & FE_ALL_EXCEPT) << FE_EXCEPT_SHIFT);
temp |= (*flagp & excepts & FE_ALL_EXCEPT) << FE_EXCEPT_SHIFT;
/* Save state back to the FPU. */
_FPU_SETCW(temp);
}

32
sysdeps/arm/fpu/ftestexcept.c Normal file
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/* Test exception in current environment.
Copyright (C) 1997, 1998 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. */
#include <fenv.h>
#include <fpu_control.h>
int
fetestexcept (int excepts)
{
fexcept_t temp;
/* Get current exceptions. */
_FPU_GETCW(temp);
return temp & excepts & FE_ALL_EXCEPT;
}