1 /* Software floating-point emulation.
2 Return (float)(*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 "single.h"
22 #include "quad.h"
23
_Qp_qtos(const long double * a)24 float _Qp_qtos(const long double *a)
25 {
26 FP_DECL_EX;
27 FP_DECL_Q(A);
28 FP_DECL_S(R);
29 float r;
30
31 FP_INIT_ROUNDMODE;
32 FP_UNPACK_SEMIRAW_QP(A, a);
33 #if _FP_W_TYPE_SIZE < 64
34 FP_TRUNC(S,Q,1,4,R,A);
35 #else
36 FP_TRUNC(S,Q,1,2,R,A);
37 #endif
38 FP_PACK_SEMIRAW_S(r, R);
39
40 QP_HANDLE_EXCEPTIONS(__asm (
41 " ldd [%1], %%f52\n"
42 " ldd [%1+8], %%f54\n"
43 " fqtos %%f52, %0\n"
44 " " : "=&f" (r) : "r" (a) : QP_CLOBBER));
45
46 return r;
47 }
48