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b168057a | 1 | /* Copyright (C) 1996-2015 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
3 | ||
4 | The GNU C Library is free software; you can redistribute it and/or | |
3214b89b AJ |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either | |
7 | version 2.1 of the License, or (at your option) any later version. | |
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8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
3214b89b | 12 | Lesser General Public License for more details. |
28c50ce9 | 13 | |
3214b89b | 14 | You should have received a copy of the GNU Lesser General Public |
ab84e3ff PE |
15 | License along with the GNU C Library. If not, see |
16 | <http://www.gnu.org/licenses/>. */ | |
28c50ce9 | 17 | |
501ee116 | 18 | #include <math.h> |
5da9d124 | 19 | #include "mathimpl.h" |
501ee116 | 20 | |
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21 | #ifndef SUFF |
22 | #define SUFF | |
863a5d82 RM |
23 | #endif |
24 | #ifndef float_type | |
25 | #define float_type double | |
26 | #endif | |
27 | ||
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28 | #define CONCATX(a,b) __CONCAT(a,b) |
29 | #define s(name) CONCATX(name,SUFF) | |
30 | #define m81(func) __m81_u(s(func)) | |
863a5d82 RM |
31 | |
32 | float_type | |
344114d0 | 33 | s(__modf) (float_type x, float_type *iptr) |
501ee116 | 34 | { |
344114d0 | 35 | float_type x_int, result; |
02c1ba5b AS |
36 | unsigned long x_cond; |
37 | ||
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38 | __asm ("fintrz%.x %1, %0" : "=f" (x_int) : "f" (x)); |
39 | *iptr = x_int; | |
02c1ba5b AS |
40 | x_cond = __m81_test (x); |
41 | if (x_cond & __M81_COND_INF) | |
344114d0 UD |
42 | { |
43 | result = 0; | |
02c1ba5b | 44 | if (x_cond & __M81_COND_NEG) |
344114d0 UD |
45 | result = -result; |
46 | } | |
02c1ba5b | 47 | else if (x_cond & __M81_COND_ZERO) |
344114d0 UD |
48 | result = x; |
49 | else | |
50 | result = x - x_int; | |
51 | return result; | |
501ee116 | 52 | } |
615f651b | 53 | weak_alias (s(__modf), s(modf)) |