1 /* isnan(). PowerPC64 version.
2 Copyright (C) 2008 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 stfd fp1,-8(r1) /* copy FPR to GPR */
28 nop /* insure the following is in a different */
29 nop /* dispatch group */
31 sldi r0,r0,32 /* const long r0 0x7ff00000 00000000 */
32 clrldi r4,r4,1 /* x = fabs(x) */
33 cmpd cr7,r4,r0 /* if (fabs(x) <= inf) */
34 li r3,0 /* then return 0 */
36 li r3,1 /* else return 1 */
41 weak_alias (__isnan, isnan)
43 /* It turns out that the 'double' version will also always work for
45 strong_alias (__isnan, __isnanf)
47 weak_alias (__isnanf, isnanf)
50 strong_alias (__isnan, __isnanl)
51 weak_alias (__isnan, isnanl)
55 # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
56 compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0);
57 compat_symbol (libc, isnan, isnanl, GLIBC_2_0);