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BitUtil: Delta, ZigZag, NumBits, Floating Point,...

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powturbo
2016-04-22 10:17:36 +02:00
parent c60f5bb032
commit d003badddb
1 changed files with 12 additions and 6 deletions
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18
bitutil.h
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@ -43,14 +43,20 @@
_b_ = TEMPLATE(bsr, _usize_)(_b_);\
}
static inline unsigned zigzagenc31(int x) { x = (x << 2 | ((x>>30)& 2)) ^ x >> 31; return x; }
static inline unsigned zigzagdec31(unsigned x) { return (x >> 2 | (x& 2)<<30 ) ^ -(x & 1); }
static inline uint64_t zigzagenc64(int64_t x) { return x << 1 ^ x >> 63; }
static inline uint64_t zigzagdec64(uint64_t x) { return x >> 1 ^ -(x & 1); }
static inline unsigned zigzagenc32(int x) { return x << 1 ^ x >> 31; }
static inline unsigned zigzagdec32(unsigned x) { return x >> 1 ^ -(x & 1); }
static inline unsigned zigzagenc32(int x) { return x << 1 ^ x >> 31; }
static inline unsigned zigzagdec32(unsigned x) { return x >> 1 ^ -(x & 1); }
static inline uint64_t zigzagenc64(int64_t x) { return x << 1 ^ x >> 63; }
static inline uint64_t zigzagdec64(uint64_t x) { return x >> 1 ^ -(x & 1); }
static inline unsigned zigzagenc31(int x) { x = (x << 2 | ((x>>30)& 2)) ^ x >> 31; return x; }
static inline unsigned zigzagdec31(unsigned x) { return (x >> 2 | (x& 2)<<30 ) ^ -(x & 1); }
static inline unsigned short zigzagenc16(short x) { return x << 1 ^ x >> 31; }
static inline unsigned short zigzagdec16(unsigned short x) { return x >> 1 ^ -(x & 1); }
static inline unsigned char zigzagenc8(char x) { return x << 1 ^ x >> 31; }
static inline unsigned char zigzagdec8(unsigned short x) { return x >> 1 ^ -(x & 1); }
#ifdef __SSE2__
#include <emmintrin.h>