diff options
| author | Ulrich Drepper <drepper@redhat.com> | 2008-04-10 05:59:52 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2008-04-10 05:59:52 +0000 |
| commit | 3e852ba889e41b8f7eb4d9a1b0abca590dbbab81 (patch) | |
| tree | e33eb86af566638f0b691064988085135038b9c3 /sysdeps | |
| parent | 3b32d8a25908459411ee77761ccf57ac3f8b4343 (diff) | |
isnan implementation for Power6x 64-bit
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/powerpc/powerpc64/power6x/fpu/s_isnan.S | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc64/power6x/fpu/s_isnan.S b/sysdeps/powerpc/powerpc64/power6x/fpu/s_isnan.S new file mode 100644 index 0000000000..47dd49a751 --- /dev/null +++ b/sysdeps/powerpc/powerpc64/power6x/fpu/s_isnan.S @@ -0,0 +1,59 @@ +/* isnan(). PowerPC64 version. + Copyright (C) 2008 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <math_ldbl_opt.h> + +/* int __isnan(x) */ + .machine power6 +EALIGN (__isnan, 4, 0) + CALL_MCOUNT 0 + mftgpr r4,fp1 /* copy FPR to GPR */ + lis r0,0x7ff0 + ori r1,r1,0 + clrldi r4,r4,1 /* x = fabs(x) */ + sldi r0,r0,32 /* const long r0 0x7ff00000 00000000 */ + cmpd cr7,r4,r0 /* if (fabs(x) <= inf) */ + li r3,0 /* then return 0 */ + blelr+ cr7 + 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 + +#ifndef 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 + |