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487972ae AZ |
1 | /* isnan(). PowerPC64/POWER8 version. |
2 | Copyright (C) 2014 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | ||
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. | |
9 | ||
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. | |
14 | ||
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/>. */ | |
18 | ||
19 | #include <sysdep.h> | |
20 | #include <math_ldbl_opt.h> | |
21 | ||
7110166d | 22 | #define MFVSRD_R3_V1 .long 0x7c230066 /* mfvsrd r3,vs1 */ |
487972ae AZ |
23 | |
24 | /* int [r3] __isnan([f1] x) */ | |
25 | ||
26 | EALIGN (__isnan, 4, 0) | |
27 | CALL_MCOUNT 0 | |
28 | MFVSRD_R3_V1 | |
29 | lis r9,0x7ff0 | |
30 | clrldi r3,r3,1 /* r3 = r3 & 0x8000000000000000 */ | |
31 | rldicr r9,r9,32,31 /* r9 = (r9 << 32) & 0xffffffff */ | |
32 | subf r3,r3,r9 | |
33 | rldicl r3,r3,1,63 | |
34 | blr | |
35 | END (__isnan) | |
36 | ||
de21c33c AZ |
37 | hidden_def (__isnan) |
38 | weak_alias (__isnan, isnan) | |
39 | ||
487972ae AZ |
40 | /* It turns out that the 'double' version will also always work for |
41 | single-precision. */ | |
42 | strong_alias (__isnan, __isnanf) | |
43 | hidden_def (__isnanf) | |
44 | weak_alias (__isnanf, isnanf) | |
45 | ||
46 | #ifdef NO_LONG_DOUBLE | |
47 | strong_alias (__isnan, __isnanl) | |
48 | weak_alias (__isnan, isnanl) | |
49 | #endif | |
50 | ||
a109996e | 51 | #if !IS_IN (libm) |
487972ae AZ |
52 | # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0) |
53 | compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0); | |
54 | compat_symbol (libc, isnan, isnanl, GLIBC_2_0); | |
55 | # endif | |
56 | #endif |