diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c b/sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c new file mode 100644 index 0000000000..3ca178a3c5 --- /dev/null +++ b/sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c @@ -0,0 +1,82 @@ +/* Return classification value corresponding to argument. + Copyright (C) 1997,1999,2002,2004,2006 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997 and + Jakub Jelinek <jj@ultra.linux.cz>, 1999. + + 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. */ + +#include <math.h> + +#include "math_private.h" +#include <math_ldbl_opt.h> + + /* + * hx lx + * +NaN 7ffn nnnn nnnn nnnn xxxx xxxx xxxx xxxx + * -NaN fffn nnnn nnnn nnnn xxxx xxxx xxxx xxxx + * +Inf 7ff0 0000 0000 0000 xxxx xxxx xxxx xxxx + * -Inf fff0 0000 0000 0000 xxxx xxxx xxxx xxxx + * +0 0000 0000 0000 0000 + * -0 8000 0000 0000 0000 + * +normal 001n nnnn nnnn nnnn (smallest) + * -normal 801n nnnn nnnn nnnn (smallest) + * +normal 7fen nnnn nnnn nnnn (largest) + * -normal ffen nnnn nnnn nnnn (largest) + * +denorm 000n nnnn nnnn nnnn + * -denorm 800n nnnn nnnn nnnn + */ + +int +___fpclassifyl (long double x) +{ + u_int64_t hx, lx; + int retval = FP_NORMAL; + + GET_LDOUBLE_WORDS64 (hx, lx, x); + if ((hx & 0x7ff0000000000000ULL) == 0x7ff0000000000000ULL) { + /* +/-NaN or +/-Inf */ + if (hx & 0x000fffffffffffffULL) { + /* +/-NaN */ + retval = FP_NAN; + } else { + retval = FP_INFINITE; + } + } else { + /* +/-zero or +/- normal or +/- denormal */ + if (hx & 0x7fffffffffffffffULL) { + /* +/- normal or +/- denormal */ + if ((hx & 0x7ff0000000000000ULL) >= 0x0360000000000000ULL) { + /* +/- normal */ + retval = FP_NORMAL; + } else { + /* +/- denormal */ + retval = FP_SUBNORMAL; + } + } else { + /* +/- zero */ + retval = FP_ZERO; + } + } + + return retval; +} +long_double_symbol (libm, ___fpclassifyl, __fpclassifyl); +#ifdef __LONG_DOUBLE_MATH_OPTIONAL +libm_hidden_ver (___fpclassifyl, __fpclassifyl) +#else +libm_hidden_def (__fpclassifyl) +#endif |