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author | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
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committer | Zack Weinberg <zackw@panix.com> | 2017-06-08 15:39:03 -0400 |
commit | 5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch) | |
tree | 4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/sysdeps/m68k/m680x0/fpu/fraiseexcpt.c | |
parent | 199fc19d3aaaf57944ef036e15904febe877fc93 (diff) | |
download | glibc-zack/build-layout-experiment.tar glibc-zack/build-layout-experiment.tar.gz glibc-zack/build-layout-experiment.tar.bz2 glibc-zack/build-layout-experiment.zip |
Prepare for radical source tree reorganization.zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'REORG.TODO/sysdeps/m68k/m680x0/fpu/fraiseexcpt.c')
-rw-r--r-- | REORG.TODO/sysdeps/m68k/m680x0/fpu/fraiseexcpt.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/m68k/m680x0/fpu/fraiseexcpt.c b/REORG.TODO/sysdeps/m68k/m680x0/fpu/fraiseexcpt.c new file mode 100644 index 0000000000..08ba0a7ef5 --- /dev/null +++ b/REORG.TODO/sysdeps/m68k/m680x0/fpu/fraiseexcpt.c @@ -0,0 +1,83 @@ +/* Raise given exceptions. + Copyright (C) 1997-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> + + 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/>. */ + +#include <fenv.h> +#include <float.h> +#include <math.h> + +int +__feraiseexcept (int excepts) +{ + /* Raise exceptions represented by EXCEPTS. But we must raise only one + signal at a time. It is important that if the overflow/underflow + exception and the divide by zero exception are given at the same + time, the overflow/underflow exception follows the divide by zero + exception. */ + + /* First: invalid exception. */ + if (excepts & FE_INVALID) + { + /* One example of an invalid operation is 0 * Infinity. */ + double d = HUGE_VAL; + __asm__ __volatile__ ("fmul%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d)); + } + + /* Next: division by zero. */ + if (excepts & FE_DIVBYZERO) + { + double d = 1.0; + __asm__ __volatile__ ("fdiv%.s %#0r0,%0; fnop" : "=f" (d) : "0" (d)); + } + + /* Next: overflow. */ + if (excepts & FE_OVERFLOW) + { + long double d = LDBL_MAX; + + __asm__ __volatile__ ("fmul%.x %0,%0; fnop" : "=f" (d) : "0" (d)); + } + + /* Next: underflow. */ + if (excepts & FE_UNDERFLOW) + { + long double d = -LDBL_MAX; + + __asm__ __volatile__ ("fetox%.x %0; fnop" : "=f" (d) : "0" (d)); + } + + /* Last: inexact. */ + if (excepts & FE_INEXACT) + { + long double d = 1.0; + __asm__ __volatile__ ("fdiv%.s %#0r3,%0; fnop" : "=f" (d) : "0" (d)); + } + + /* Success. */ + return 0; +} + +#include <shlib-compat.h> +#if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2) +strong_alias (__feraiseexcept, __old_feraiseexcept) +compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1); +#endif + +libm_hidden_def (__feraiseexcept) +libm_hidden_ver (__feraiseexcept, feraiseexcept) +versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2); |