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TurboPFor-Integer-Compression/vp4d.c
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2017-01-02 23:30:16 +01:00

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/**
Copyright (C) powturbo 2013-2017
GPL v2 License
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- homepage : https://sites.google.com/site/powturbo/
- github : https://github.com/powturbo
- twitter : https://twitter.com/powturbo
- email : powturbo [_AT_] gmail [_DOT_] com
**/
// "Integer Compression" TurboPFor - Pfor/PforDelta
#ifndef USIZE
#include <stdint.h>
#include "conf.h"
#include "bitunpack.h"
#include "bitutil.h"
#include "vp4d.h"
#include "vint.h"
#include "vsimple.h"
#define PAD8(__x) ( (((__x)+8-1)/8) )
#define VSIZEX 256
#if 0 //defined(__AVX_2__)
#include "avx2.h"
#elif defined(__SSSE3__)
#include <tmmintrin.h>
static ALIGNED(char, shuffles[16][16], 16) = {
#define _ 0x80
{ _,_,_,_, _,_,_,_, _,_, _, _, _, _, _,_ },
{ 0,1,2,3, _,_,_,_, _,_, _, _, _, _, _,_ },
{ _,_,_,_, 0,1,2,3, _,_, _, _, _, _, _,_ },
{ 0,1,2,3, 4,5,6,7, _,_, _, _, _, _, _,_ },
{ _,_,_,_, _,_,_,_, 0,1, 2, 3, _, _, _,_ },
{ 0,1,2,3, _,_,_,_, 4,5, 6, 7, _, _, _,_ },
{ _,_,_,_, 0,1,2,3, 4,5, 6, 7, _, _, _,_ },
{ 0,1,2,3, 4,5,6,7, 8,9,10,11, _, _, _,_ },
{ _,_,_,_, _,_,_,_, _,_,_,_, 0, 1, 2, 3 },
{ 0,1,2,3, _,_,_,_, _,_,_, _, 4, 5, 6, 7 },
{ _,_,_,_, 0,1,2,3, _,_,_, _, 4, 5, 6, 7 },
{ 0,1,2,3, 4,5,6,7, _,_, _, _, 8, 9,10,11 },
{ _,_,_,_, _,_,_,_, 0,1, 2, 3, 4, 5, 6, 7 },
{ 0,1,2,3, _,_,_,_, 4,5, 6, 7, 8, 9,10,11 },
{ _,_,_,_, 0,1,2,3, 4,5, 6, 7, 8, 9,10,11 },
{ 0,1,2,3, 4,5,6,7, 8,9,10,11, 12,13,14,15 },
#undef _
};
#endif
#define USIZE 64
#define _P4DEC _p4dec
#define P4DEC p4dec
#define BITUNPACK bitunpack // unpack only
#define BITUNPACKD bitunpack // integrated unpack
#define _BITUNPACKD bitunpack // integrated
#define P4START
#include __FILE__
#define P4DECX
#define USIZE 16
#include __FILE__
#define USIZE 32
#include __FILE__
#undef P4DECX
#undef P4DECX
#define P4START start,
#define P4START_T
#define _P4DEC _p4ddec //delta0
#define P4DEC p4ddec
#define BITUNPACKD bitdunpack
#define _BITUNPACKD _bitdunpack
#define BITUNDD bitund
#include __FILE__
#define _P4DEC _p4d1dec //delta1
#define P4DEC p4d1dec
#define BITUNPACKD bitd1unpack
#define _BITUNPACKD bitd1unpack
#define BITUNDD bitund1
#include __FILE__
#undef _P4DEC
#undef P4DEC
#undef BITUNPACK
#undef BITUNDD
// SIMD -------------
#define P4START
#undef P4START_T
#define VSIZE 128
#define _P4DEC _p4dec128v
#define P4DEC p4dec128v
#define BITUNPACK bitunpack128v
#define BITUNPACKD bitunpack128v
#define _BITUNPACKD _bitunpack128v
#include __FILE__
#define P4START start,
#define P4START_T
#define _P4DEC _p4ddec128v
#define P4DEC p4ddec128v
#define BITUNPACKD bitdunpack128v
#define _BITUNPACKD _bitdunpack128v
#define BITUNDD bitund
#include __FILE__
#define _P4DEC _p4d1dec128v
#define P4DEC p4d1dec128v
#define BITUNPACKD bitd1unpack128v
#define _BITUNPACKD _bitd1unpack128v
#define BITUNDD bitund1
#include __FILE__
#undef BITUNDD
#ifdef __AVX2__
#define P4START
#undef P4START_T
#define VSIZE 256
#define _P4DEC _p4dec256v
#define P4DEC p4dec256v
#define BITUNPACK bitunpack256v
#define BITUNPACKD bitunpack256v
#define _BITUNPACKD _bitunpack256v
#include __FILE__
#define P4START start,
#define P4START_T
#define _P4DEC _p4ddec256v
#define P4DEC p4ddec256v
#define BITUNPACKD bitdunpack256v
#define _BITUNPACKD _bitdunpack256v
#define BITUNDD bitund
#include __FILE__
#define _P4DEC _p4d1dec256v
#define P4DEC p4d1dec256v
#define BITUNPACKD bitd1unpack256v
#define _BITUNPACKD _bitd1unpack256v
#define BITUNDD bitund1
#include __FILE__
#undef BITUNDD
#endif
#else
#define uint_t TEMPLATE3(uint, USIZE, _t)
//#pragma GCC push_options
//#pragma GCC optimize ("unroll-loops")
#ifdef P4START_T
unsigned char *TEMPLATE2(_P4DEC, USIZE)(unsigned char *__restrict in, unsigned n, uint_t *__restrict out, uint_t start, unsigned b, unsigned bx ) {
#else
unsigned char *TEMPLATE2(_P4DEC, USIZE)(unsigned char *__restrict in, unsigned n, uint_t *__restrict out, unsigned b, unsigned bx ) {
#endif
uint_t ex[VSIZEX+8];
if(!(b & 1)) return TEMPLATE2(BITUNPACKD, USIZE)(in,
#ifndef VSIZE
n,
#endif
out, P4START b>>1);
b >>= 1;
#ifdef VSIZE
unsigned char *pb = in;
#if VSIZE == 128
in = TEMPLATE2(bitunpack, USIZE)(in+16, popcnt64(ctou64(in)) + popcnt64(ctou64(in+8)), ex, bx);
#else
in = TEMPLATE2(bitunpack, USIZE)(in+32, popcnt64(ctou64(in)) + popcnt64(ctou64(in+8)) + popcnt64(ctou64(in+16)) + popcnt64(ctou64(in+24)), ex, bx);
#endif
return TEMPLATE2(_BITUNPACKD, USIZE)(in, out, P4START b, ex, pb);
#else
unsigned long long bb[VSIZEX/64]; unsigned num=0,i,p4dn = (n+63)/64;
for(i = 0; i < n/64; i++) { bb[i] = ctou64(in+i*8); num += popcnt64(bb[i]); }
if(n & 0x3f) { bb[i] = ctou64(in+i*8) & ((1ull<<(n&0x3f))-1); num += popcnt64(bb[i]); }
in = TEMPLATE2(bitunpack, USIZE)(in+PAD8(n), num, ex, bx);
in = TEMPLATE2(bitunpack, USIZE)(in,
#ifndef VSIZE
n,
#endif
out, b);
#if 0 //defined(AVX_2__)
uint_t *op,*pex = ex;
for(i = 0; i < p4dn; i++) {
for(op = out; bb[i]; bb[i] >>= 8,op += 8) { unsigned m = (unsigned char)bb[i], mc=popcnt32(m), s = pex[mc]; pex[mc]=0;
_mm256_storeu_si256((__m256i *)op, _mm256_add_epi32(_mm256_loadu_si256((const __m256i*)op), mm256_maskz_expand_epi32(m,_mm256_slli_epi32(_mm256_load_si256((const __m256i*)pex), b)))); pex += mc; *pex=s;
} //out += 64;
}
#elif defined(__SSSE3__) && USIZE == 32
uint_t *_op=out,*op,*pex = ex;
for(i = 0; i < p4dn; i++) {
for(op=_op; bb[i]; bb[i] >>= 4,op+=4) { const unsigned m = bb[i]&0xf;
_mm_storeu_si128((__m128i *)op, _mm_add_epi32(_mm_loadu_si128((__m128i*)op), _mm_shuffle_epi8(_mm_slli_epi32(_mm_loadu_si128((__m128i*)pex), b), _mm_load_si128((__m128i*)shuffles[m]) ) )); pex += popcnt32(m);
} _op+=64;
}
#else
unsigned k = 0; uint_t *_op=out,*op;
for(op=_op,i = 0; i < p4dn; i++) {
while(bb[i]) { unsigned x = ctz64(bb[i]); op[x] += ex[k++]<<b; bb[i] ^= (1ull<<x); } _op += 8;
}
#endif
#ifdef BITUNDD
TEMPLATE2(BITUNDD, USIZE)(out, n, start);
#endif
return in;
#endif
}
#ifdef P4START_T
unsigned char *TEMPLATE2(P4DEC, USIZE)(unsigned char *__restrict in, unsigned n, uint_t *__restrict out, uint_t start) {
#else
unsigned char *TEMPLATE2(P4DEC, USIZE)(unsigned char *__restrict in, unsigned n, uint_t *__restrict out) {
#endif
unsigned b = *in++,bx,i;
if(likely(!(b & 0x80))) {
if(b & 1)
bx = *in++;
return TEMPLATE2(_P4DEC, USIZE)(in, n, out, P4START b, bx );
} else {
uint_t ex[VSIZEX+8];
b = (b & 0x7f)>>1;
bx = *in++;
in = TEMPLATE2(BITUNPACK, USIZE)(in,
#ifndef VSIZE
n,
#endif
out, b);
in = TEMPLATE2(vbdec, USIZE)(in, bx, ex);
for(i = 0; i != (bx & ~3); i += 4) {
out[in[i ]] |= ex[i ] << b;
out[in[i+1]] |= ex[i+1] << b;
out[in[i+2]] |= ex[i+2] << b;
out[in[i+3]] |= ex[i+3] << b;
}
for(;i < bx; i++)
out[in[i]] |= ex[i] << b;
in += bx;
#ifdef BITUNDD
TEMPLATE2(BITUNDD, USIZE)(out, n, start);
#endif
return in;
}
}
#ifdef P4DECX
unsigned char *TEMPLATE2(p4decx, USIZE)(unsigned char *in, unsigned n, uint_t *__restrict out) {
unsigned b,i;
struct p4 p4;
p4ini(&p4, &in, n, &b);
if(unlikely(p4.i & 1)) {
for(i = 0; i != n&~3; i+=4) {
out[i ] = TEMPLATE2(p4getx, USIZE)(&p4, in, i , b);
out[i+1] = TEMPLATE2(p4getx, USIZE)(&p4, in, i+1, b);
out[i+2] = TEMPLATE2(p4getx, USIZE)(&p4, in, i+2, b);
out[i+3] = TEMPLATE2(p4getx, USIZE)(&p4, in, i+3, b);
}
for( ; i != n; i++)
out[i ] = TEMPLATE2(p4getx, USIZE)(&p4, in, i , b);
} else {
for(i = 0; i != n&~3; i+=4) {
out[i ] = TEMPLATE2(_bitgetx, USIZE)(in, i *b, b);
out[i+1] = TEMPLATE2(_bitgetx, USIZE)(in, (i+1)*b, b);
out[i+2] = TEMPLATE2(_bitgetx, USIZE)(in, (i+2)*b, b);
out[i+3] = TEMPLATE2(_bitgetx, USIZE)(in, (i+3)*b, b);
}
for( ; i != n; i++)
out[i ] = TEMPLATE2(_bitgetx, USIZE)(in, i *b, b);
}
return in + PAD8(n*b);
}
unsigned char *TEMPLATE2(p4fdecx, USIZE)(unsigned char *in, unsigned n, uint_t *__restrict out, unsigned start) {
unsigned b,i;
struct p4 p4;
p4ini(&p4, &in, n, &b);
if(unlikely(p4.i & 1)) {
for(i = 0; i < n; i++)
out[i] = TEMPLATE2(p4getx, USIZE)(&p4, in, i, b)+start+i+1;
} else for(i = 0; i < n; i++) out[i] = TEMPLATE2(_bitgetx, USIZE)(in, i*b, b)+start+i+1;
return in + PAD8(n*b);
}
unsigned char *TEMPLATE2(p4f0decx, USIZE)(unsigned char *in, unsigned n, uint_t *__restrict out, unsigned start) {
unsigned b,i;
struct p4 p4;
p4ini(&p4, &in, n, &b);
if(unlikely(p4.i & 1)) {
for(i = 0; i < n; i++)
out[i] = TEMPLATE2(p4getx, USIZE)(&p4, in, i, b)+start;// return p4.ex + PAD8((p4.cum[P4DN-1] + popcnt64(p4.xmap[P4DN-1]))*p4.bx);
} else for(i = 0; i < n; i++) out[i] = TEMPLATE2(_bitgetx, USIZE)(in, i*b, b)+start;
return in + PAD8(n*b);
}
#endif
#endif
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