projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 478b92f0 UD |
1 | /* Copyright (C) 1997 Free Software Foundation, Inc. |
| 2 | This file is part of the GNU C Library. | |
| 3 | Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>. | |
| 4 | ||
| 5 | The GNU C Library is free software; you can redistribute it and/or | |
| 6 | modify it under the terms of the GNU Library General Public License as | |
| 7 | published by the Free Software Foundation; either version 2 of the | |
| 8 | License, or (at your option) any later version. | |
| 9 | ||
| 10 | The GNU C Library is distributed in the hope that it will be useful, | |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 13 | Library General Public License for more details. | |
| 14 | ||
| 15 | You should have received a copy of the GNU Library General Public | |
| 16 | License along with the GNU C Library; see the file COPYING.LIB. If not, | |
| 17 | write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 18 | Boston, MA 02111-1307, USA. */ | |
| 19 | ||
| f43ce637 | 20 | #define __LIBC_INTERNAL_MATH_INLINES |
| 478b92f0 UD |
21 | #include <math.h> |
| 22 | ||
| 23 | #ifndef SUFF | |
| 24 | #define SUFF | |
| 25 | #endif | |
| 26 | #ifndef float_type | |
| 27 | #define float_type double | |
| 28 | #endif | |
| 29 | ||
| 30 | #define CONCATX(a,b) __CONCAT(a,b) | |
| 31 | #define s(name) CONCATX(name,SUFF) | |
| 32 | #define m81(func) __m81_u(s(func)) | |
| 33 | ||
| 34 | float_type | |
| 35 | s(__ieee754_scalb) (float_type x, float_type fn) | |
| 36 | { | |
| 37 | float_type retval; | |
| 38 | unsigned long x_cond = __m81_test (x); | |
| 39 | unsigned long fn_cond = __m81_test (fn); | |
| 40 | ||
| 41 | if ((x_cond | fn_cond) & __M81_COND_NAN) | |
| 42 | return x * fn; | |
| 43 | ||
| 44 | if (fn_cond & __M81_COND_INF) | |
| 45 | { | |
| 46 | if (!(fn_cond & __M81_COND_NEG)) | |
| 47 | return x * fn; | |
| 48 | else if (x_cond & __M81_COND_ZERO) | |
| 49 | return x; | |
| 50 | else if (x_cond & __M81_COND_INF) | |
| 51 | return 0.0/0.0; | |
| 52 | else | |
| 53 | return x / -fn; | |
| 54 | } | |
| 55 | ||
| 56 | if (m81(__rint) (fn) != fn) | |
| 57 | return 0.0/0.0; | |
| 58 | ||
| 59 | __asm ("fscale%.x %1, %0" : "=f" (retval) : "f" (fn), "0" (x)); | |
| 60 | return retval; | |
| 61 | } |