diff options
Diffstat (limited to 'sysdeps/m68k/m680x0/fpu/e_ilogb.c')
-rw-r--r-- | sysdeps/m68k/m680x0/fpu/e_ilogb.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/sysdeps/m68k/m680x0/fpu/e_ilogb.c b/sysdeps/m68k/m680x0/fpu/e_ilogb.c new file mode 100644 index 0000000000..0288ac14e9 --- /dev/null +++ b/sysdeps/m68k/m680x0/fpu/e_ilogb.c @@ -0,0 +1,47 @@ +/* Copyright (C) 1996-2014 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 <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(__ieee754_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; +} |