| /* Copyright (C) 1997-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>. |
| |
| 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 <math_private.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)) |
| |
| float_type |
| s(__ieee754_scalb) (float_type x, float_type fn) |
| { |
| float_type retval; |
| unsigned long x_cond = __m81_test (x); |
| unsigned long fn_cond = __m81_test (fn); |
| |
| if ((x_cond | fn_cond) & __M81_COND_NAN) |
| return x * fn; |
| |
| if (fn_cond & __M81_COND_INF) |
| { |
| if (!(fn_cond & __M81_COND_NEG)) |
| return x * fn; |
| else if (x_cond & __M81_COND_ZERO) |
| return x; |
| else |
| return x / -fn; |
| } |
| |
| if (m81(__rint) (fn) != fn) |
| return (x - x) / (x - x); |
| |
| __asm ("fscale%.x %1, %0" : "=f" (retval) : "f" (fn), "0" (x)); |
| return retval; |
| } |
| strong_alias (s(__ieee754_scalb), CONCATX (s(__scalb), _finite)) |
