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d876f532 UD |
1 | /* Software floating-point emulation. |
2 | (*c) = (*a) - (*b) | |
b168057a | 3 | Copyright (C) 1997-2015 Free Software Foundation, Inc. |
d876f532 UD |
4 | This file is part of the GNU C Library. |
5 | Contributed by Richard Henderson (rth@cygnus.com) and | |
6 | Jakub Jelinek (jj@ultra.linux.cz). | |
7 | ||
8 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
9 | modify it under the terms of the GNU Lesser General Public |
10 | License as published by the Free Software Foundation; either | |
11 | version 2.1 of the License, or (at your option) any later version. | |
d876f532 UD |
12 | |
13 | The GNU C Library is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 16 | Lesser General Public License for more details. |
d876f532 | 17 | |
41bdb6e2 | 18 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
19 | License along with the GNU C Library; if not, see |
20 | <http://www.gnu.org/licenses/>. */ | |
d876f532 UD |
21 | |
22 | #include "soft-fp.h" | |
23 | #include "quad.h" | |
24 | ||
25 | void _Qp_sub(long double *c, const long double *a, const long double *b) | |
26 | { | |
27 | FP_DECL_EX; | |
28 | FP_DECL_Q(A); FP_DECL_Q(B); FP_DECL_Q(C); | |
29 | ||
30 | FP_INIT_ROUNDMODE; | |
fe0b1e85 RM |
31 | FP_UNPACK_SEMIRAW_QP(A, a); |
32 | FP_UNPACK_SEMIRAW_QP(B, b); | |
d876f532 | 33 | FP_SUB_Q(C, A, B); |
fe0b1e85 | 34 | FP_PACK_SEMIRAW_QP(c, C); |
d876f532 | 35 | QP_HANDLE_EXCEPTIONS(__asm ( |
ba77ce24 AJ |
36 | " ldd [%1], %%f52\n" |
37 | " ldd [%1+8], %%f54\n" | |
38 | " ldd [%2], %%f56\n" | |
39 | " ldd [%2+8], %%f58\n" | |
40 | " fsubq %%f52, %%f56, %%f60\n" | |
41 | " std %%f60, [%0]\n" | |
42 | " std %%f62, [%0+8]\n" | |
43 | " " : : "r" (c), "r" (a), "r" (b) : QP_CLOBBER)); | |
d876f532 | 44 | } |