1 /* isnan(). PowerPC64 version.
2 Copyright (C) 2008-2015 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
20 #include <math_ldbl_opt.h>
24 EALIGN (__isnan, 4, 0)
26 mftgpr r4,fp1 /* copy FPR to GPR */
29 clrldi r4,r4,1 /* x = fabs(x) */
30 sldi r0,r0,32 /* const long r0 0x7ff00000 00000000 */
31 cmpd cr7,r4,r0 /* if (fabs(x) <= inf) */
32 li r3,0 /* then return 0 */
34 li r3,1 /* else return 1 */
39 weak_alias (__isnan, isnan)
41 /* It turns out that the 'double' version will also always work for
43 strong_alias (__isnan, __isnanf)
45 weak_alias (__isnanf, isnanf)
48 strong_alias (__isnan, __isnanl)
49 weak_alias (__isnan, isnanl)
53 # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
54 compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0);
55 compat_symbol (libc, isnan, isnanl, GLIBC_2_0);