diff options
Diffstat (limited to 'sysdeps/ieee754/dbl-64/wordsize-64/s_issignaling.c')
-rw-r--r-- | sysdeps/ieee754/dbl-64/wordsize-64/s_issignaling.c | 43 |
1 files changed, 0 insertions, 43 deletions
diff --git a/sysdeps/ieee754/dbl-64/wordsize-64/s_issignaling.c b/sysdeps/ieee754/dbl-64/wordsize-64/s_issignaling.c deleted file mode 100644 index 5fb6fbc7d4..0000000000 --- a/sysdeps/ieee754/dbl-64/wordsize-64/s_issignaling.c +++ /dev/null @@ -1,43 +0,0 @@ -/* Test for signaling NaN. - Copyright (C) 2013-2021 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 - <https://www.gnu.org/licenses/>. */ - -#include <math.h> -#include <math_private.h> -#include <nan-high-order-bit.h> - -int -__issignaling (double x) -{ - uint64_t xi; - EXTRACT_WORDS64 (xi, x); -#if HIGH_ORDER_BIT_IS_SET_FOR_SNAN - /* 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 (xi & UINT64_C (0x7ff8000000000000)) == UINT64_C (0x7ff8000000000000); -#else - /* 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). */ - xi ^= UINT64_C (0x0008000000000000); - /* We have to compare for greater (instead of greater or equal), because x's - significand being all-zero designates infinity not NaN. */ - return (xi & UINT64_C (0x7fffffffffffffff)) > UINT64_C (0x7ff8000000000000); -#endif -} -libm_hidden_def (__issignaling) |