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1 | /* |
2 | * Copyright 2011 Tilera Corporation. All Rights Reserved. |
3 | * |
4 | * This program is free software; you can redistribute it and/or |
5 | * modify it under the terms of the GNU General Public License |
6 | * as published by the Free Software Foundation, version 2. |
7 | * |
8 | * This program is distributed in the hope that it will be useful, but |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
11 | * NON INFRINGEMENT. See the GNU General Public License for |
12 | * more details. |
13 | * |
14 | * Provide a mask based on the pointer alignment that |
15 | * sets up non-zero bytes before the beginning of the string. |
16 | * The MASK expression works because shift counts are taken mod 64. |
17 | * Also, specify how to count "first" and "last" bits |
18 | * when the bits have been read as a word. |
19 | */ |
20 | |
21 | #include <asm/byteorder.h> |
22 | |
23 | #ifdef __LITTLE_ENDIAN |
24 | #define MASK(x) (__insn_shl(1ULL, (x << 3)) - 1) |
25 | #define NULMASK(x) ((2ULL << x) - 1) |
26 | #define CFZ(x) __insn_ctz(x) |
27 | #define REVCZ(x) __insn_clz(x) |
28 | #else |
29 | #define MASK(x) (__insn_shl(-2LL, ((-x << 3) - 1))) |
30 | #define NULMASK(x) (-2LL << (63 - x)) |
31 | #define CFZ(x) __insn_clz(x) |
32 | #define REVCZ(x) __insn_ctz(x) |
33 | #endif |
34 |
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javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9