diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/s_issignaling.c')
-rw-r--r-- | sysdeps/ieee754/dbl-64/s_issignaling.c | 47 |
1 files changed, 0 insertions, 47 deletions
diff --git a/sysdeps/ieee754/dbl-64/s_issignaling.c b/sysdeps/ieee754/dbl-64/s_issignaling.c deleted file mode 100644 index 09e12f9a6a..0000000000 --- a/sysdeps/ieee754/dbl-64/s_issignaling.c +++ /dev/null @@ -1,47 +0,0 @@ -/* Test for signaling NaN. - Copyright (C) 2013-2017 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 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 <math.h> -#include <math_private.h> -#include <nan-high-order-bit.h> - -int -__issignaling (double x) -{ -#if HIGH_ORDER_BIT_IS_SET_FOR_SNAN - u_int32_t hxi; - GET_HIGH_WORD (hxi, x); - /* We only have to care about the high-order bit of x's significand, because - having it set (sNaN) already makes the significand different from that - used to designate infinity. */ - return (hxi & 0x7ff80000) == 0x7ff80000; -#else - u_int32_t hxi, lxi; - EXTRACT_WORDS (hxi, lxi, x); - /* To keep the following comparison simple, toggle the quiet/signaling bit, - so that it is set for sNaNs. This is inverse to IEEE 754-2008 (as well as - common practice for IEEE 754-1985). */ - hxi ^= 0x00080000; - /* If lxi != 0, then set any suitable bit of the significand in hxi. */ - hxi |= (lxi | -lxi) >> 31; - /* We have to compare for greater (instead of greater or equal), because x's - significand being all-zero designates infinity not NaN. */ - return (hxi & 0x7fffffff) > 0x7ff80000; -#endif -} -libm_hidden_def (__issignaling) |