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d876f532 UD |
1 | /* Software floating-point emulation. |
2 | (*c) = (*a) * (*b) | |
04277e02 | 3 | Copyright (C) 1997-2019 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 | 19 | License along with the GNU C Library; if not, see |
5a82c748 | 20 | <https://www.gnu.org/licenses/>. */ |
d876f532 UD |
21 | |
22 | /* As QP_HANDLE_EXCEPTIONS reloads FPU control word anyway, | |
23 | avoid doing it twice. */ | |
24 | #define _FP_MUL_MEAT_RESET_FE do {} while (0) | |
25 | #include "soft-fp.h" | |
26 | #include "quad.h" | |
27 | ||
28 | void _Qp_mul(long double *c, const long double *a, const long double *b) | |
29 | { | |
30 | FP_DECL_EX; | |
31 | FP_DECL_Q(A); FP_DECL_Q(B); FP_DECL_Q(C); | |
32 | ||
33 | FP_INIT_ROUNDMODE; | |
34 | FP_UNPACK_QP(A, a); | |
35 | FP_UNPACK_QP(B, b); | |
36 | FP_MUL_Q(C, A, B); | |
37 | FP_PACK_QP(c, C); | |
38 | QP_HANDLE_EXCEPTIONS( | |
350635a5 OB |
39 | _FPU_SETCW(_fcw); |
40 | __asm ( | |
ba77ce24 AJ |
41 | " ldd [%1], %%f52\n" |
42 | " ldd [%1+8], %%f54\n" | |
43 | " ldd [%2], %%f56\n" | |
44 | " ldd [%2+8], %%f58\n" | |
45 | " fmulq %%f52, %%f56, %%f60\n" | |
46 | " std %%f60, [%0]\n" | |
47 | " std %%f62, [%0+8]\n" | |
48 | " " : : "r" (c), "r" (a), "r" (b) : QP_CLOBBER)); | |
d876f532 | 49 | } |