1 /* isnan(). PowerPC64/POWER7 version.
2 Copyright (C) 2010-2013 Free Software Foundation, Inc.
3 Contributed by Luis Machado <luisgpm@br.ibm.com>.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
21 #include <math_ldbl_opt.h>
26 .tc FD_ONE[TC],0x3ff0000000000000
28 .type __isnan, @function
30 EALIGN (__isnan, 4, 0)
35 bflr 30 /* If not NaN, finish. */
37 stfd fp1,-16(r1) /* Transfer FP to GPR's. */
38 ori 2,2,0 /* Force a new dispatch group. */
39 ld r4,-16(r1) /* Load FP into GPR. */
41 sldi r0,r0,32 /* const long r0 0x7ff00000 00000000. */
42 clrldi r4,r4,1 /* x = fabs(x) */
43 cmpd cr7,r4,r0 /* if (fabs(x) <= inf) */
44 blelr cr7 /* LE means not NaN. */
45 li r3,1 /* else return 1 */
50 weak_alias (__isnan, isnan)
52 /* It turns out that the 'double' version will also always work for
54 strong_alias (__isnan, __isnanf)
56 weak_alias (__isnanf, isnanf)
59 strong_alias (__isnan, __isnanl)
60 weak_alias (__isnan, isnanl)
64 # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0)
65 compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0);
66 compat_symbol (libc, isnan, isnanl, GLIBC_2_0);