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BitUnpack: Direct Access/Update, FOR, Delta+FOR, SIMD

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powturbo
2015-06-18 17:39:01 +02:00
parent 21ff717cd6
commit 75b42a7eb7
1 changed files with 11 additions and 9 deletions
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20
bitunpack.h
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@ -26,15 +26,17 @@
#ifdef __cplusplus
extern "C" {
#endif
#include <stdint.h>
#include "conf.h"
// ---------------- Unpack a previously bit packed (scalar bitpack32 or bipack16) integer array -----------------------------------------------------------------
// ---------------- Unpack a bit packed integer array --------------------------------------------------------------------------------------
// unpack a bitpacked integer array. Return value = end of packed buffer in
unsigned char *bitunpack16(unsigned char *__restrict in, unsigned n, unsigned short *__restrict out, unsigned b);
unsigned char *bitunpack32(unsigned char *__restrict in, unsigned n, unsigned *__restrict out, unsigned b);
unsigned char *bitunpack16(unsigned char *__restrict in, unsigned n, unsigned short *__restrict out, unsigned b);
unsigned char *bitunpack64(unsigned char *__restrict in, unsigned n, uint64_t *__restrict out, unsigned b);
// ---------------- Direct Access to a single bit packed (see bitpack.h) integer array entry --------------------------------------------------------------------
// ---------------- Direct Access to a single packed integer array entry --------------------------------------------------------------------
#ifdef __AVX2__
#include <x86intrin.h>
#else
@ -42,11 +44,11 @@ unsigned char *bitunpack32(unsigned char *__restrict in, unsigned n, unsigned
#define _bzhi_u32(__u, __b) ((__u) & ((1u <<__b)-1))
#endif
// Get a single 32 bits value with index "idx" (or bit index b*idx) from a previously bit packed (scalar bitpack32) integer array
// Get a single 32 bits value with index "idx" (or bit index b*idx) from packed integer array
static ALWAYS_INLINE unsigned bitgetx32(unsigned char *__restrict in, unsigned b, unsigned idx) { unsigned bidx = b*idx; return _bzhi_u64( (*(unsigned long long *)((unsigned *)in+(bidx>>5))) >> (bidx&0x1f), b ); }
static ALWAYS_INLINE unsigned _bitgetx32(unsigned char *__restrict in, unsigned b, unsigned bidx) { return _bzhi_u64( (*(unsigned long long *)((unsigned *)in+(bidx>>5))) >> (bidx&0x1f), b ); }
// like bitgetx32 but for 16 bits integer array (see scalar bitpack16)
// like bitgetx32 but for 16 bits integer array
static ALWAYS_INLINE unsigned bitgetx16(unsigned char *__restrict in, unsigned b, unsigned idx) { unsigned bidx = b*idx; return _bzhi_u32( (*(unsigned *)((unsigned *)in+(bidx>>4))) >> (bidx& 0xf), b ); }
static ALWAYS_INLINE unsigned _bitgetx16(unsigned char *__restrict in, unsigned b, unsigned bidx) { return _bzhi_u32( (*(unsigned *)((unsigned *)in+(bidx>>4))) >> (bidx& 0xf), b ); }
@ -54,7 +56,7 @@ static ALWAYS_INLINE unsigned _bitgetx16(unsigned char *__restrict in, unsigned
static ALWAYS_INLINE void bitsetx32(unsigned char *__restrict in, unsigned b, unsigned idx, unsigned v) { unsigned bidx = b*idx; unsigned long long *p = (unsigned long long *)((unsigned *)in+(bidx>>5)); *p = ( *p & ~(((1ull<<b)-1) << (bidx&0x1f)) ) | (unsigned long long)v<<(bidx&0x1f);}
static ALWAYS_INLINE void bitsetx16(unsigned char *__restrict in, unsigned b, unsigned idx, unsigned v) { unsigned bidx = b*idx; unsigned *p = (unsigned *) in+(bidx>>4) ; *p = ( *p & ~(((1u <<b)-1) << (bidx& 0xf)) ) | v<<(bidx& 0xf);}
// ---------------- Delta+FOR : integrated bitpacking, for delta packed SORTED array (Ex. DocId in inverted index) -------------------------------
// ---------------- DFOR : integrated bitpacking, for delta packed SORTED array (Ex. DocId in inverted index) -------------------------------
// start < out[0] < out[1] < ... < out[n-2] < out[n-1] < (1<<N)-1, N=32,16
// out[0] = start + in[0] + 1; out[1] = out[0] + in[1] + 1; ... ; out[i] = out[i-1] + in[i] + 1
unsigned char *bitd1unpack32( unsigned char *__restrict in, unsigned n, unsigned *__restrict out, unsigned start, unsigned b);
@ -65,7 +67,7 @@ unsigned char *bitd1unpack16( unsigned char *__restrict in, unsigned n, unsigne
unsigned char *bitdunpack32( unsigned char *__restrict in, unsigned n, unsigned *__restrict out, unsigned start, unsigned b);
unsigned char *bitdunpack16( unsigned char *__restrict in, unsigned n, unsigned short *__restrict out, unsigned start, unsigned b);
// ---------------- FOR : Direct Access for packed SORTED array ---------------------------------------------------------------------
// ---------------- For : Direct Access for packed SORTED array (Ex. DocId in inverted index) --------------------------------------------
// out[i] = start + in[i] + i + 1
unsigned char *bitf1unpack32( unsigned char *__restrict in, unsigned n, unsigned *__restrict out, unsigned start, unsigned b);
unsigned char *bitf1unpack16( unsigned char *__restrict in, unsigned n, unsigned short *__restrict out, unsigned start, unsigned b);
@ -74,8 +76,8 @@ unsigned char *bitf1unpack16( unsigned char *__restrict in, unsigned n, unsigned
unsigned char *bitfunpack32( unsigned char *__restrict in, unsigned n, unsigned *__restrict out, unsigned start, unsigned b);
unsigned char *bitfunpack16( unsigned char *__restrict in, unsigned n, unsigned short *__restrict out, unsigned start, unsigned b);
// ---------------- SIMD : unpack a bit packed integer array (SIMD vertical bitpacking) --------------------------------------------------
// SIMD unpack a bitpacked (see bitpackv32/bitdpackv32/bitd1packv32) integer array. Return value = end of packed buffer in
// ---------------- SIMD : unpack a bit packed integer array -------------------------------------------------------------------------------
// SIMD unpack a bitpacked integer array. Return value = end of packed buffer in
unsigned char *bitunpackv32( unsigned char *__restrict in, unsigned n, unsigned *__restrict out , unsigned b);
unsigned char *bitdunpackv32( unsigned char *__restrict in, unsigned n, unsigned *__restrict out, unsigned start, unsigned b);
unsigned char *bitd1unpackv32(unsigned char *__restrict in, unsigned n, unsigned *__restrict out, unsigned start, unsigned b);