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1 | /* |
2 | * QEMU TILE-Gx helpers | |
3 | * | |
4 | * Copyright (c) 2015 Chen Gang | |
5 | * | |
6 | * This 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 | * This 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 this library; if not, see | |
18 | * <http://www.gnu.org/licenses/lgpl-2.1.html> | |
19 | */ | |
20 | ||
21 | #include "cpu.h" | |
22 | #include "qemu-common.h" | |
23 | #include "exec/helper-proto.h" | |
24 | ||
25 | ||
26 | uint64_t helper_v1shl(uint64_t a, uint64_t b) | |
27 | { | |
28 | uint64_t m; | |
29 | ||
30 | b &= 7; | |
31 | m = 0x0101010101010101ULL * (0xff >> b); | |
32 | return (a & m) << b; | |
33 | } | |
34 | ||
35 | uint64_t helper_v1shru(uint64_t a, uint64_t b) | |
36 | { | |
37 | uint64_t m; | |
38 | ||
39 | b &= 7; | |
40 | m = 0x0101010101010101ULL * ((0xff << b) & 0xff); | |
41 | return (a & m) >> b; | |
42 | } | |
43 | ||
44 | uint64_t helper_v1shrs(uint64_t a, uint64_t b) | |
45 | { | |
46 | uint64_t r = 0; | |
47 | int i; | |
48 | ||
49 | b &= 7; | |
50 | for (i = 0; i < 64; i += 8) { | |
51 | int64_t ae = (int8_t)(a >> i); | |
52 | r |= ((ae >> b) & 0xff) << i; | |
53 | } | |
54 | return r; | |
55 | } |