1 /* Software floating-point emulation.
2 (*c) = (long double)(a)
3 Copyright (C) 1997-2022 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20 #include "soft-fp.h"
21 #include "double.h"
22 #include "quad.h"
23
_Qp_dtoq(long double * c,const double a)24 void _Qp_dtoq(long double *c, const double a)
25 {
26 FP_DECL_EX;
27 FP_DECL_D(A);
28 FP_DECL_Q(C);
29
30 FP_INIT_ROUNDMODE;
31 FP_UNPACK_RAW_D(A, a);
32 #if _FP_W_TYPE_SIZE < 64
33 FP_EXTEND(Q,D,4,2,C,A);
34 #else
35 FP_EXTEND(Q,D,2,1,C,A);
36 #endif
37 FP_PACK_RAW_QP(c, C);
38 QP_HANDLE_EXCEPTIONS(__asm (
39 " fdtoq %1, %%f60\n"
40 " std %%f60, [%0]\n"
41 " std %%f62, [%0+8]\n"
42 " " : : "r" (c), "e" (a) : QP_CLOBBER));
43 }
44