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83 lines
1.6 KiB
C
83 lines
1.6 KiB
C
/**
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* Author......: See docs/credits.txt
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* License.....: MIT
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*/
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#include "common.h"
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#include "types.h"
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#include "bitops.h"
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u32 rotl32 (const u32 a, const u32 n)
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{
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#if defined (_MSC_VER)
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return _rotl (a, n);
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#else
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return ((a << n) | (a >> (32 - n)));
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#endif
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}
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u32 rotr32 (const u32 a, const u32 n)
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{
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#if defined (_MSC_VER)
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return _rotr (a, n);
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#else
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return ((a >> n) | (a << (32 - n)));
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#endif
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}
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u64 rotl64 (const u64 a, const u64 n)
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{
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#if defined (_MSC_VER)
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return _rotl64 (a, n);
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#else
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return ((a << n) | (a >> (64 - n)));
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#endif
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}
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u64 rotr64 (const u64 a, const u64 n)
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{
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#if defined (_MSC_VER)
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return _rotr64 (a, n);
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#else
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return ((a >> n) | (a << (64 - n)));
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#endif
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}
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u16 byte_swap_16 (const u16 n)
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{
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return (n & 0xff00) >> 8
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| (n & 0x00ff) << 8;
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}
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u32 byte_swap_32 (const u32 n)
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{
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#if defined (_MSC_VER)
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return _byteswap_ulong (n);
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#elif defined (__clang__) || defined (__GNUC__)
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return __builtin_bswap32 (n);
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#else
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return (n & 0xff000000) >> 24
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| (n & 0x00ff0000) >> 8
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| (n & 0x0000ff00) << 8
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| (n & 0x000000ff) << 24;
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#endif
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}
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u64 byte_swap_64 (const u64 n)
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{
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#if defined (_MSC_VER)
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return _byteswap_uint64 (n);
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#elif defined (__clang__) || defined (__GNUC__)
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return __builtin_bswap64 (n);
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#else
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return (n & 0xff00000000000000ULL) >> 56
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| (n & 0x00ff000000000000ULL) >> 40
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| (n & 0x0000ff0000000000ULL) >> 24
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| (n & 0x000000ff00000000ULL) >> 8
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| (n & 0x00000000ff000000ULL) << 8
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| (n & 0x0000000000ff0000ULL) << 24
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| (n & 0x000000000000ff00ULL) << 40
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| (n & 0x00000000000000ffULL) << 56;
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#endif
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}
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