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, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include <math_ldbl_opt.h>
25 EALIGN (__isnan, 4, 0)
27 stfd fp1,-8(r1) /* copy FPR to GPR */
29 nop /* insure the following is in a different */
30 nop /* dispatch group */
32 sldi r0,r0,32 /* const long r0 0x7ff00000 00000000 */
33 clrldi r4,r4,1 /* x = fabs(x) */
34 cmpd cr7,r4,r0 /* if (fabs(x) <= inf) */
35 li r3,0 /* then return 0 */
37 li r3,1 /* else return 1 */
42 weak_alias (__isnan, isnan)
44 /* It turns out that the 'double' version will also always work for
46 strong_alias (__isnan, __isnanf)
48 weak_alias (__isnanf, isnanf)
51 strong_alias (__isnan, __isnanl)
52 weak_alias (__isnan, isnanl)
56 # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
57 compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0);
58 compat_symbol (libc, isnan, isnanl, GLIBC_2_0);