diff options
Diffstat (limited to 'sysdeps/m68k/fpu/s_ilogb.c')
-rw-r--r-- | sysdeps/m68k/fpu/s_ilogb.c | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/sysdeps/m68k/fpu/s_ilogb.c b/sysdeps/m68k/fpu/s_ilogb.c new file mode 100644 index 0000000..ee1e397 --- /dev/null +++ b/sysdeps/m68k/fpu/s_ilogb.c @@ -0,0 +1,51 @@ +/* Copyright (C) 1996, 1997, 1999 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 <math.h> +#include "mathimpl.h" + +#ifndef SUFF +#define SUFF +#endif +#ifndef float_type +#define float_type double +#endif + +#define CONCATX(a,b) __CONCAT(a,b) +#define s(name) CONCATX(name,SUFF) +#define m81(func) __m81_u(s(func)) + +int +s(__ilogb) (float_type x) +{ + float_type result; + unsigned long x_cond; + + x_cond = __m81_test (x); + /* We must return consistent values for zero and NaN. */ + if (x_cond & __M81_COND_ZERO) + return FP_ILOGB0; + if (x_cond & (__M81_COND_NAN | __M81_COND_INF)) + return FP_ILOGBNAN; + + __asm ("fgetexp%.x %1, %0" : "=f" (result) : "f" (x)); + return (int) result; +} + +#define weak_aliasx(a,b) weak_alias(a,b) +weak_aliasx (s(__ilogb), s(ilogb)) |