projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 0f507b6c | 1 | /* isnan(). PowerPC64/POWER7 version. |
| f7a9f785 | 2 | Copyright (C) 2010-2016 Free Software Foundation, Inc. |
| 0f507b6c LM |
3 | Contributed by Luis Machado <luisgpm@br.ibm.com>. |
| 4 | This file is part of the GNU C Library. | |
| 5 | ||
| 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. | |
| 10 | ||
| 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. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public | |
| 59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 0f507b6c LM |
19 | |
| 20 | #include <sysdep.h> | |
| 21 | #include <math_ldbl_opt.h> | |
| 22 | ||
| 23 | /* int __isnan(x) */ | |
| 24 | .section ".toc","aw" | |
| 25 | .LC0: /* 1.0 */ | |
| 26 | .tc FD_ONE[TC],0x3ff0000000000000 | |
| 27 | .section ".text" | |
| 28 | .type __isnan, @function | |
| 29 | .machine power7 | |
| 30 | EALIGN (__isnan, 4, 0) | |
| 31 | CALL_MCOUNT 0 | |
| 32 | lfd fp0,.LC0@toc(r2) | |
| 33 | ftdiv cr7,fp1,fp0 | |
| 34 | li r3,0 | |
| 35 | bflr 30 /* If not NaN, finish. */ | |
| 36 | ||
| 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. */ | |
| 40 | lis r0,0x7ff0 | |
| 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 */ | |
| 46 | blr | |
| 47 | END (__isnan) | |
| 48 | ||
| 49 | hidden_def (__isnan) | |
| 50 | weak_alias (__isnan, isnan) | |
| 51 | ||
| 52 | /* It turns out that the 'double' version will also always work for | |
| 53 | single-precision. */ | |
| 54 | strong_alias (__isnan, __isnanf) | |
| 55 | hidden_def (__isnanf) | |
| 56 | weak_alias (__isnanf, isnanf) | |
| 57 | ||
| 58 | #ifdef NO_LONG_DOUBLE | |
| 59 | strong_alias (__isnan, __isnanl) | |
| 60 | weak_alias (__isnan, isnanl) | |
| 61 | #endif | |
| 62 | ||
| a109996e | 63 | #if !IS_IN (libm) |
| 0f507b6c LM |
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); | |
| 67 | # endif | |
| 68 | #endif |