diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c | 37 |
1 files changed, 25 insertions, 12 deletions
diff --git a/sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c b/sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c index 3ca178a..6999abc 100644 --- a/sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c +++ b/sysdeps/ieee754/ldbl-128ibm/s_fpclassifyl.c @@ -1,5 +1,5 @@ /* Return classification value corresponding to argument. - Copyright (C) 1997,1999,2002,2004,2006 Free Software Foundation, Inc. + Copyright (C) 1997,1999,2002,2004,2006,2007 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. @@ -30,14 +30,16 @@ * -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 + * +0 0000 0000 0000 0000 xxxx xxxx xxxx xxxx + * -0 8000 0000 0000 0000 xxxx xxxx xxxx xxxx + * +normal 0360 0000 0000 0000 0000 0000 0000 0000 (smallest) + * -normal 8360 0000 0000 0000 0000 0000 0000 0000 (smallest) + * +normal 7fef ffff ffff ffff 7c8f ffff ffff fffe (largest) + * +normal ffef ffff ffff ffff fc8f ffff ffff fffe (largest) + * +denorm 0360 0000 0000 0000 8000 0000 0000 0001 (largest) + * -denorm 8360 0000 0000 0000 0000 0000 0000 0001 (largest) + * +denorm 000n nnnn nnnn nnnn xxxx xxxx xxxx xxxx + * -denorm 800n nnnn nnnn nnnn xxxx xxxx xxxx xxxx */ int @@ -59,12 +61,23 @@ ___fpclassifyl (long double x) /* +/-zero or +/- normal or +/- denormal */ if (hx & 0x7fffffffffffffffULL) { /* +/- normal or +/- denormal */ - if ((hx & 0x7ff0000000000000ULL) >= 0x0360000000000000ULL) { + if ((hx & 0x7ff0000000000000ULL) > 0x0360000000000000ULL) { /* +/- normal */ retval = FP_NORMAL; } else { - /* +/- denormal */ - retval = FP_SUBNORMAL; + if ((hx & 0x7ff0000000000000ULL) == 0x0360000000000000ULL) { + if ((lx & 0x7fffffffffffffff) /* lower is non-zero */ + && ((lx^hx) & 0x8000000000000000ULL)) { /* and sign differs */ + /* +/- denormal */ + retval = FP_SUBNORMAL; + } else { + /* +/- normal */ + retval = FP_NORMAL; + } + } else { + /* +/- denormal */ + retval = FP_SUBNORMAL; + } } } else { /* +/- zero */ |