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42 lines
1.2 KiB
42 lines
1.2 KiB
/* |
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* Copyright 2010 Tilera Corporation. All Rights Reserved. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation, version 2. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
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* NON INFRINGEMENT. See the GNU General Public License for |
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* more details. |
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*/ |
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#ifndef _ASM_TILE_CHECKSUM_H |
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#define _ASM_TILE_CHECKSUM_H |
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#include <asm-generic/checksum.h> |
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/* Allow us to provide a more optimized do_csum(). */ |
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__wsum do_csum(const unsigned char *buff, int len); |
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#define do_csum do_csum |
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/* |
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* Return the sum of all the 16-bit subwords in a long. |
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* This sums two subwords on a 32-bit machine, and four on 64 bits. |
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* The implementation does two vector adds to capture any overflow. |
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*/ |
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static inline unsigned int csum_long(unsigned long x) |
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{ |
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unsigned long ret; |
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#ifdef __tilegx__ |
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ret = __insn_v2sadu(x, 0); |
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ret = __insn_v2sadu(ret, 0); |
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#else |
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ret = __insn_sadh_u(x, 0); |
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ret = __insn_sadh_u(ret, 0); |
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#endif |
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return ret; |
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} |
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#endif /* _ASM_TILE_CHECKSUM_H */
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