projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 3b32d8a2 | 1 | /* isnan(). PowerPC64 version. |
| 688903eb | 2 | Copyright (C) 2008-2018 Free Software Foundation, Inc. |
| 3b32d8a2 UD |
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 | |
| 59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ | |
| 3b32d8a2 UD |
18 | |
| 19 | #include <sysdep.h> | |
| 20 | #include <math_ldbl_opt.h> | |
| 21 | ||
| 22 | /* int __isnan(x) */ | |
| 23 | .machine power5 | |
| d5b41185 | 24 | ENTRY_TOCLESS (__isnan, 4) |
| 3b32d8a2 UD |
25 | CALL_MCOUNT 0 |
| 26 | stfd fp1,-8(r1) /* copy FPR to GPR */ | |
| 27 | lis r0,0x7ff0 | |
| 28 | nop /* insure the following is in a different */ | |
| 29 | nop /* dispatch group */ | |
| 9c84384c | 30 | ld r4,-8(r1) |
| 3b32d8a2 UD |
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 */ | |
| 35 | blelr+ cr7 | |
| 36 | li r3,1 /* else return 1 */ | |
| 37 | blr | |
| 38 | END (__isnan) | |
| 39 | ||
| 40 | hidden_def (__isnan) | |
| 41 | weak_alias (__isnan, isnan) | |
| 42 | ||
| 43 | /* It turns out that the 'double' version will also always work for | |
| 44 | single-precision. */ | |
| 45 | strong_alias (__isnan, __isnanf) | |
| 46 | hidden_def (__isnanf) | |
| 47 | weak_alias (__isnanf, isnanf) | |
| 48 | ||
| 49 | #ifdef NO_LONG_DOUBLE | |
| 50 | strong_alias (__isnan, __isnanl) | |
| 51 | weak_alias (__isnan, isnanl) | |
| 52 | #endif | |
| 53 | ||
| a109996e | 54 | #if !IS_IN (libm) |
| 3b32d8a2 UD |
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); | |
| 58 | # endif | |
| 59 | #endif | |
| 60 |