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TurboPFor: Bit Pack/UnPack c/c++ header

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2017-03-19 13:20:19 +01:00
parent 92a0b521ba
commit 6a2b3dc7f2
1 changed files with 4 additions and 2 deletions
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6
bitpack.h
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@ -135,7 +135,7 @@ unsigned char *bitunpack64( const unsigned char *__restrict in, unsigned n, uint
// ---------------- Direct Access to a single packed integer array entry --------------------------------------------------------------
#ifndef NTURBOPFOR_DAC
#ifdef __AVX2__
#if __AVX2__
#include <immintrin.h>
#define bzhi64(_u_, _b_) _bzhi_u64(_u_, _b_)
#define bzhi32(_u_, _b_) _bzhi_u32(_u_, _b_)
@ -146,8 +146,10 @@ unsigned char *bitunpack64( const unsigned char *__restrict in, unsigned n, uint
#include "conf.h"
// Get a single 32 bits value with index "idx" (or bit index b*idx) from packed integer array
static ALWAYS_INLINE unsigned bitgetx32(const unsigned char *__restrict in, unsigned idx, unsigned b) { unsigned bidx = b*idx; return bzhi64( ctou64((uint32_t *)in+(bidx>>5)) >> (bidx&0x1f), b ); }
//static ALWAYS_INLINE unsigned bitgetx32(const unsigned char *__restrict in, unsigned idx, unsigned b) { unsigned bidx = b*idx;
//return (ctou64((uint32_t *)in+(bidx>>5)) << 32+(bidx&0x1f)) >> (64-b);
// return bzhi64( ctou64((uint32_t *)in+(bidx>>5)) >> (bidx&0x1f), b ); }
static ALWAYS_INLINE unsigned _bitgetx32(const unsigned char *__restrict in, uint64_t bidx, unsigned b) { return bzhi64( ctou64((uint32_t *)in+(bidx>>5)) >> (bidx&0x1f), b ); }
// like bitgetx32 but for 16 bits integer array