1 | /* Software floating-point emulation: comparison. |
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 | static long |
22 | internal_equality (long al, long ah, long bl, long bh, long neq) |
23 | { |
24 | FP_DECL_EX; |
25 | FP_DECL_Q(A); FP_DECL_Q(B); |
26 | long r; |
27 | |
28 | AXP_UNPACK_RAW_Q(A, a); |
29 | AXP_UNPACK_RAW_Q(B, b); |
30 | |
31 | if ((A_e == _FP_EXPMAX_Q && !_FP_FRAC_ZEROP_2(A)) |
32 | || (B_e == _FP_EXPMAX_Q && !_FP_FRAC_ZEROP_2(B))) |
33 | { |
34 | /* EQ and NE signal invalid operation only if either operand is SNaN. */ |
35 | if (FP_ISSIGNAN_Q(A) || FP_ISSIGNAN_Q(B)) |
36 | { |
37 | FP_SET_EXCEPTION(FP_EX_INVALID); |
38 | FP_HANDLE_EXCEPTIONS; |
39 | } |
40 | return -1; |
41 | } |
42 | |
43 | r = (A_e == B_e |
44 | && _FP_FRAC_EQ_2 (A, B) |
45 | && (A_s == B_s || (!A_e && _FP_FRAC_ZEROP_2(A)))); |
46 | r ^= neq; |
47 | |
48 | return r; |
49 | } |
50 | |
51 | long |
52 | _OtsEqlX (long al, long ah, long bl, long bh) |
53 | { |
54 | return internal_equality (al, ah, bl, bh, neq: 0); |
55 | } |
56 | |
57 | long |
58 | _OtsNeqX (long al, long ah, long bl, long bh) |
59 | { |
60 | return internal_equality (al, ah, bl, bh, neq: 1); |
61 | } |
62 | |