diff options
Diffstat (limited to 'sysdeps/alpha')
| -rw-r--r-- | sysdeps/alpha/Makefile | 4 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/fclrexcpt.c | 36 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/fegetenv.c | 37 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/fegetround.c | 31 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/feholdexcpt.c | 33 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/fenvbits.h | 107 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/fesetenv.c | 45 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/fesetround.c | 41 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/feupdateenv.c | 38 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/fgetexcptflg.c | 33 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/fpu_control.h | 46 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/fraiseexcpt.c | 72 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/fsetexcptflg.c | 36 | ||||
| -rw-r--r-- | sysdeps/alpha/fpu/ftestexcept.c | 32 |
14 files changed, 568 insertions, 23 deletions
diff --git a/sysdeps/alpha/Makefile b/sysdeps/alpha/Makefile index 841dc980a8..5fe8e4ee7f 100644 --- a/sysdeps/alpha/Makefile +++ b/sysdeps/alpha/Makefile @@ -44,3 +44,7 @@ sysdep-CFLAGS += -mno-fp-regs endif divrem := divl divq reml remq + +# For now, build everything with full IEEE math support. +# TODO: build separate libm and libm-ieee. +sysdep-CFLAGS += -mieee diff --git a/sysdeps/alpha/fpu/fclrexcpt.c b/sysdeps/alpha/fpu/fclrexcpt.c new file mode 100644 index 0000000000..7aa79af100 --- /dev/null +++ b/sysdeps/alpha/fpu/fclrexcpt.c @@ -0,0 +1,36 @@ +/* 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 Richard Henderson <rth@tamu.edu>, 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) +{ + unsigned long swcr; + + /* Get the current state. */ + swcr = __ieee_get_fp_control(); + + /* Clear the relevant bits. */ + swcr &= ~((unsigned long)excepts & FE_ALL_EXCEPT); + + /* Put the new state in effect. */ + __ieee_set_fp_control(swcr); +} diff --git a/sysdeps/alpha/fpu/fegetenv.c b/sysdeps/alpha/fpu/fegetenv.c new file mode 100644 index 0000000000..c8b705d230 --- /dev/null +++ b/sysdeps/alpha/fpu/fegetenv.c @@ -0,0 +1,37 @@ +/* Store current floating-point environment. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson <rth@tamu.edu>, 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) +{ + unsigned long fpcr, swcr; + + /* Get status from software and hardware. Note that we don't need an + excb because the callsys is an implied trap barrier. */ + swcr = __ieee_get_fp_control(); + __asm__ __volatile__("mf_fpcr %0" : "=f"(fpcr)); + + /* Merge the two bits of information. The magic number at the end is + the exception enable mask. */ + + *envp = (fpcr & (3UL << 58)) | (swcr & (FE_ALL_EXCEPT | 0x3e)); +} diff --git a/sysdeps/alpha/fpu/fegetround.c b/sysdeps/alpha/fpu/fegetround.c new file mode 100644 index 0000000000..623e2ce358 --- /dev/null +++ b/sysdeps/alpha/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 Richard Henderson <rth@tamu.edu>, 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) +{ + unsigned long fpcr; + + __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(fpcr)); + + return (fpcr >> 58) & 3; +} diff --git a/sysdeps/alpha/fpu/feholdexcpt.c b/sysdeps/alpha/fpu/feholdexcpt.c new file mode 100644 index 0000000000..493d6a18eb --- /dev/null +++ b/sysdeps/alpha/fpu/feholdexcpt.c @@ -0,0 +1,33 @@ +/* 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 Richard Henderson <rth@tamu.edu>, 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) +{ + /* Save the current state. */ + fegetenv(envp); + + /* Clear all exception status bits and exception enable bits. */ + __ieee_set_fp_control(0); + + return 1; +} diff --git a/sysdeps/alpha/fpu/fenvbits.h b/sysdeps/alpha/fpu/fenvbits.h new file mode 100644 index 0000000000..02414e4c30 --- /dev/null +++ b/sysdeps/alpha/fpu/fenvbits.h @@ -0,0 +1,107 @@ +/* Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson <rth@tamu.edu>, 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. */ + +/* This file should never be included directly. */ + +#ifndef _FENVBITS_H +#define _FENVBITS_H 1 + +/* 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 + { + 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 = + (FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID) +#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_TOWARDSZERO = 0, +#define FE_TOWARDSZERO FE_TOWARDSZERO + + FE_DOWNWARD = 1, +#define FE_DOWNWARD FE_DOWNWARD + + FE_TONEAREST = 2, +#define FE_TONEAREST FE_TONEAREST + + FE_UPWARD = 3, +#define FE_UPWARD FE_UPWARD + }; + + +/* Type representing exception flags. */ +typedef unsigned long fexcept_t; + +/* Type representing floating-point environment. */ +typedef unsigned long 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 ((fenv_t *) 0x8800000000000000UL) + +#ifdef __USE_GNU +/* Floating-point environment where none of the exceptions are masked. */ +# define FE_NOMASK_ENV ((fenv_t *) 0x880000000000003eUL) +#endif + +/* The system calls to talk to the kernel's FP code. */ +extern unsigned long __ieee_get_fp_control(void); +extern void __ieee_set_fp_control(unsigned long); + + +#endif /* fenvbits.h */ diff --git a/sysdeps/alpha/fpu/fesetenv.c b/sysdeps/alpha/fpu/fesetenv.c new file mode 100644 index 0000000000..3692967a5b --- /dev/null +++ b/sysdeps/alpha/fpu/fesetenv.c @@ -0,0 +1,45 @@ +/* Install given floating-point environment. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson <rth@tamu.edu>, 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 +fesetenv (const fenv_t *envp) +{ + unsigned long fpcr; + fenv_t env; + + /* Magic encoding of default values: high bit set (never possible for a + user-space address) is not indirect. And we don't even have to get + rid of it since we mask things around just below. */ + if ((long)envp >= 0) + env = *envp; + else + env = (unsigned long)envp; + + /* Reset the rounding mode with the hardware fpcr. Note that the following + system call is an implied trap barrier for our modification. */ + __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(fpcr)); + fpcr = (fpcr & ~(3UL << 58)) | (env & (3UL << 58)); + __asm__ __volatile__("mt_fpcr %0" : : "f"(fpcr)); + + /* Reset the exception status and mask with the kernel's FP code. */ + __ieee_set_fp_control(env & (FE_ALL_EXCEPT | 0x3e)); +} diff --git a/sysdeps/alpha/fpu/fesetround.c b/sysdeps/alpha/fpu/fesetround.c new file mode 100644 index 0000000000..f49586cf8b --- /dev/null +++ b/sysdeps/alpha/fpu/fesetround.c @@ -0,0 +1,41 @@ +/* Set current rounding direction. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson <rth@tamu.edu>, 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 long fpcr; + + if (round & ~3) + return 0; + + /* Get the current state. */ + __asm__ __volatile__("excb; mf_fpcr %0" : "=f"(fpcr)); + + /* Set the relevant bits. */ + fpcr = (fpcr & ~(3UL << 58)) | ((unsigned long)round << 58); + + /* Put the new state in effect. */ + __asm__ __volatile__("mt_fpcr %0; excb" : : "f"(fpcr)); + + return 1; +} diff --git a/sysdeps/alpha/fpu/feupdateenv.c b/sysdeps/alpha/fpu/feupdateenv.c new file mode 100644 index 0000000000..816575a134 --- /dev/null +++ b/sysdeps/alpha/fpu/feupdateenv.c @@ -0,0 +1,38 @@ +/* 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 Richard Henderson <rth@tamu.edu>, 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) +{ + unsigned long tmp; + + /* Get the current exception state. */ + tmp = __ieee_get_fp_control(); + + /* Install new environment. */ + fesetenv(envp); + + /* Raise the saved 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)tmp & FE_ALL_EXCEPT); +} diff --git a/sysdeps/alpha/fpu/fgetexcptflg.c b/sysdeps/alpha/fpu/fgetexcptflg.c new file mode 100644 index 0000000000..28d9e129b1 --- /dev/null +++ b/sysdeps/alpha/fpu/fgetexcptflg.c @@ -0,0 +1,33 @@ +/* Store current representation for exceptions. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson <rth@tamu.edu>, 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) +{ + unsigned long tmp; + + /* Get the current state. */ + tmp = __ieee_get_fp_control(); + + /* Return that portion that corresponds to the requested exceptions. */ + *flagp = tmp & excepts & FE_ALL_EXCEPT; +} diff --git a/sysdeps/alpha/fpu/fpu_control.h b/sysdeps/alpha/fpu/fpu_control.h index 219ea55f24..bcf73e857e 100644 --- a/sysdeps/alpha/fpu/fpu_control.h +++ b/sysdeps/alpha/fpu/fpu_control.h @@ -1,23 +1,22 @@ -/* FPU control word bits. Alpha version. -Copyright (C) 1996 Free Software Foundation, Inc. -Contributed by Olaf Flebbe. - -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., 675 Mass Ave, -Cambridge, MA 02139, USA. */ +/* FPU control word bits. Alpha-maped-to-Intel version. + Copyright (C) 1996 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Olaf Flebbe. + + 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 _ALPHA_FPU_CONTROL_H #define _ALPHA_FPU_CONTROL_H @@ -91,11 +90,12 @@ Cambridge, MA 02139, USA. */ qualifier. By setting the dynamic rounding mode to +infinity, one can use /d to get round to +infinity with no extra overhead (so long as the default isn't changed, of course...) - - exceptions on overflow, zero divide and NaN */ -#define _FPU_DEFAULT 0x1f72 + - no exceptions enabled. */ + +#define _FPU_DEFAULT 0x137f /* IEEE: same as above, but exceptions */ -#define _FPU_IEEE 0x1f7f +#define _FPU_IEEE 0x137f /* Type of the control word. */ typedef unsigned int fpu_control_t; diff --git a/sysdeps/alpha/fpu/fraiseexcpt.c b/sysdeps/alpha/fpu/fraiseexcpt.c new file mode 100644 index 0000000000..6a53e55e7d --- /dev/null +++ b/sysdeps/alpha/fpu/fraiseexcpt.c @@ -0,0 +1,72 @@ +/* Raise given exceptions. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson <rth@tamu.edu>, 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) +{ + double tmp; + + /* 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 precedes the inexact exception. */ + + /* We do these bits in assembly to be certain GCC doesn't optimize + away something important. */ + + /* First: invalid exception. */ + if (FE_INVALID & excepts) + { + /* One example of a invalid operation is 0 * Infinity. */ + __asm__ __volatile__("mult/sui $f31,%1,%0; trapb" + : "=f"(tmp) : "f"(HUGE_VAL)); + } + + /* Next: division by zero. */ + if (FE_DIVBYZERO & excepts) + { + __asm__ __volatile__("cmpteq $f31,$f31,%0; divt/sui %0,$f31,%0; trapb" + : "=f"(tmp)); + } + + /* Next: overflow. */ + if (FE_OVERFLOW & excepts) + { + __asm__ __volatile__("mult/sui %1,%1,%0; trapb" + : "=f"(tmp) : "f"(DBL_MAX)); + } + + /* Next: underflow. */ + if (FE_UNDERFLOW & excepts) + { + __asm__ __volatile__("divt/sui %1,%2,%0; trapb" + : "=f"(tmp) : "f"(DBL_MIN), "f"(16.0)); + } + + /* Last: inexact. */ + if (FE_INEXACT & excepts) + { + __asm__ __volatile__("divt/sui %1,%2,%0; trapb" + : "=f"(tmp) : "f"(1.0), "f"(M_PI)); + } +} diff --git a/sysdeps/alpha/fpu/fsetexcptflg.c b/sysdeps/alpha/fpu/fsetexcptflg.c new file mode 100644 index 0000000000..7e373bea6f --- /dev/null +++ b/sysdeps/alpha/fpu/fsetexcptflg.c @@ -0,0 +1,36 @@ +/* Set floating-point environment exception handling. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Richard Henderson <rth@tamu.edu>, 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 +fesetexceptflag (const fexcept_t *flagp, int excepts) +{ + unsigned long tmp; + + /* Get the current exception state. */ + tmp = __ieee_get_fp_control(); + + /* Set all the bits that were called for. */ + tmp = tmp & ~FE_ALL_EXCEPT | *flagp & excepts & FE_ALL_EXCEPT; + + /* And store it back. */ + __ieee_set_fp_control(tmp); +} diff --git a/sysdeps/alpha/fpu/ftestexcept.c b/sysdeps/alpha/fpu/ftestexcept.c new file mode 100644 index 0000000000..9ee9dc9c55 --- /dev/null +++ b/sysdeps/alpha/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 Richard Henderson <rth@tamu.edu>, 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) +{ + unsigned long tmp; + + /* Get current exceptions. */ + tmp = __ieee_get_fp_control(); + + return tmp & excepts & FE_ALL_EXCEPT; +} |