| /* isnan(). PowerPC64/POWER7 version. |
| Copyright (C) 2010-2018 Free Software Foundation, Inc. |
| Contributed by Luis Machado <luisgpm@br.ibm.com>. |
| 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) */ |
| .section ".toc","aw" |
| .LC0: /* 1.0 */ |
| .tc FD_ONE[TC],0x3ff0000000000000 |
| .section ".text" |
| .type __isnan, @function |
| .machine power7 |
| ENTRY (__isnan, 4) |
| CALL_MCOUNT 0 |
| lfd fp0,.LC0@toc(r2) |
| ftdiv cr7,fp1,fp0 |
| li r3,0 |
| bflr 30 /* If not NaN, finish. */ |
| |
| stfd fp1,-16(r1) /* Transfer FP to GPR's. */ |
| ori 2,2,0 /* Force a new dispatch group. */ |
| ld r4,-16(r1) /* Load FP into GPR. */ |
| lis r0,0x7ff0 |
| sldi r0,r0,32 /* const long r0 0x7ff00000 00000000. */ |
| clrldi r4,r4,1 /* x = fabs(x) */ |
| cmpd cr7,r4,r0 /* if (fabs(x) <= inf) */ |
| blelr cr7 /* LE means not NaN. */ |
| li r3,1 /* else return 1 */ |
| 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 |
