1 | /* Software floating-point emulation: convert to fortran nearest. |
2 | Copyright (C) 1997-2022 Free Software Foundation, Inc. |
3 | This file is part of the GNU C Library. |
4 | |
5 | The GNU C Library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with the GNU C Library. If not, see |
17 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include "local-soft-fp.h" |
20 | |
21 | long |
22 | _OtsNintXQ (long al, long ah, long _round) |
23 | { |
24 | FP_DECL_EX; |
25 | FP_DECL_Q(A); FP_DECL_Q(B); FP_DECL_Q(C); |
26 | unsigned long r; |
27 | long s; |
28 | |
29 | /* If bit 3 is set, then integer overflow detection is requested. */ |
30 | s = _round & 8 ? 1 : -1; |
31 | _round = _round & 3; |
32 | |
33 | FP_INIT_ROUNDMODE; |
34 | AXP_UNPACK_SEMIRAW_Q(A, a); |
35 | |
36 | /* Build 0.5 * sign(A) */ |
37 | B_e = _FP_EXPBIAS_Q; |
38 | __FP_FRAC_SET_2 (B, 0, 0); |
39 | B_s = A_s; |
40 | |
41 | FP_ADD_Q(C, A, B); |
42 | _FP_FRAC_SRL_2(C, _FP_WORKBITS); |
43 | _FP_FRAC_HIGH_RAW_Q(C) &= ~(_FP_W_TYPE)_FP_IMPLBIT_Q; |
44 | FP_TO_INT_Q(r, C, 64, s); |
45 | if (s > 0 && (_fex &= FP_EX_INVALID)) |
46 | FP_HANDLE_EXCEPTIONS; |
47 | |
48 | return r; |
49 | } |
50 | |