| /* isnan(). PowerPC64 version. |
| Copyright (C) 2008-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| #include <math_ldbl_opt.h> |
| |
| /* int __isnan(x) */ |
| .machine power4 |
| ENTRY_TOCLESS (__isnan, 4) |
| CALL_MCOUNT 0 |
| mffs fp0 |
| #if defined __clang__ |
| mtfsb0 30 /* reset_fpscr_bit (FPSCR_VE) */ |
| #else |
| mtfsb0 4*cr6+lt /* reset_fpscr_bit (FPSCR_VE) */ |
| #endif |
| fcmpu cr7,fp1,fp1 |
| mtfsf 255,fp0 |
| li r3,0 |
| beqlr+ cr7 /* (x == x) then not a NAN */ |
| li r3,1 /* else must be a NAN */ |
| blr |
| END (__isnan) |
| |
| hidden_def (__isnan) |
| weak_alias (__isnan, isnan) |
| |
| /* It turns out that the 'double' version will also always work for |
| single-precision. */ |
| strong_alias (__isnan, __isnanf) |
| hidden_def (__isnanf) |
| weak_alias (__isnanf, isnanf) |
| |
| #ifdef NO_LONG_DOUBLE |
| strong_alias (__isnan, __isnanl) |
| weak_alias (__isnan, isnanl) |
| #endif |
| |
| #if !IS_IN (libm) |
| # if LONG_DOUBLE_COMPAT(libc, GLIBC_2_0) |
| compat_symbol (libc, __isnan, __isnanl, GLIBC_2_0); |
| compat_symbol (libc, isnan, isnanl, GLIBC_2_0); |
| # endif |
| #endif |