TurboPFor: TurboPFor encode
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TurboPFor/vp4c.c
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TurboPFor/vp4c.c
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/**
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Copyright (C) powturbo 2013-2017
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GPL v2 License
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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- homepage : https://sites.google.com/site/powturbo/
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- github : https://github.com/powturbo
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- twitter : https://twitter.com/powturbo
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- email : powturbo [_AT_] gmail [_DOT_] com
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**/
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// "Integer Compression" Turbo PFor/PforDelta
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#ifndef USIZE
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#include <stdint.h>
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#include "conf.h"
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#include "bitpack.h"
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#include "vint.h" //#include "vsimple.h"
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#include "vp4c.h"
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#define PAD8(_x_) ( (((_x_)+8-1)/8) )
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//------------------------------------------
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#define EXCEP 1 // Hybrid TurboPFor : 1=Variable byte (2=Vsimple, not used)
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#define _P4BITS _p4bits
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//-- Scalar
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#define _P4ENC _p4enc
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#define P4ENC p4enc
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#define BITPACK bitpack
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#define USIZE 16
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#include "vp4c.c"
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#define USIZE 32
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#include "vp4c.c"
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#define USIZE 64
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#include "vp4c.c"
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#define EXCEP 0 // Direct access
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#define _P4BITS _p4bitsx
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#define _P4ENC _p4encx
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#define P4ENC p4encx
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#define USIZE 16
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#include "vp4c.c"
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#define USIZE 32
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#include "vp4c.c"
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#undef _P4ENC
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#undef P4ENC
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#undef BITPACK
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#undef _P4BITS
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#ifndef NSIMD
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#define EXCEP 1 //
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#ifdef __SSE2__
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//-- SIMD: Vertical bitpacking
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#define VSIZE 128
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#define _P4ENC _p4enc128v
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#define P4ENC p4enc128v
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#define BITPACK bitpack128v
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#define USIZE 32
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#include "vp4c.c"
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#undef _P4ENC
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#undef P4ENC
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#undef BITPACK
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#endif
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#ifdef __AVX2__
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#define VSIZE 256
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#define _P4ENC _p4enc256v
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#define P4ENC p4enc256v
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#define BITPACK bitpack256v
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#define USIZE 32
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#include "vp4c.c"
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#undef _P4ENC
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#undef P4ENC
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#undef BITPACK
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#endif
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#endif
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#undef USIZE
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#else
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#pragma clang diagnostic push
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#pragma clang diagnostic ignored "-Wparentheses"
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#define uint_t TEMPLATE3(uint, USIZE, _t)
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#define VSC(a)
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#ifdef _P4BITS
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unsigned TEMPLATE2(_P4BITS, USIZE)(uint_t *__restrict in, unsigned n, unsigned *pbx) {
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uint_t *ip, b=0;
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int r,i,ml,l;
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unsigned x, bx, cnt[USIZE+1] = {0}, _vb[USIZE*2+5] = {0}, *vb=&_vb[USIZE],fx=0, bmap8=(n+7)/8;
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#if EXCEP >= 2
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unsigned long long smap[USIZE+1][P4D_MAX/64]={0},xmap[P4D_MAX/64]={0}; unsigned c;
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#endif
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#define CNTE { ++cnt[r=TEMPLATE2(bsr, USIZE)(*ip)]; VSC(c = ip-in; smap[r][c>>6] |= (1ull << (c&0x3f))); b |= *ip++; }
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for(ip = in; ip != in+(n&~3); ) { CNTE; CNTE; CNTE; CNTE; }
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while(ip != in+n) CNTE;
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b = TEMPLATE2(bsr, USIZE)(b);
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bx = b;
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ml = PAD8(n*b)+1; x = cnt[b];
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#if EXCEP == 1
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#define VBB(_x_,_b_) vb[_b_-7]+=_x_; vb[_b_-15]+=_x_*2; vb[_b_-19]+=_x_*3; vb[_b_-25]+=_x_*4;
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int vv = x; VBB(x,b);
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#elif EXCEP == 2
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for(c = 0; c < (n+63)/64;c++) xmap[c] = smap[b][c];
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#else
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ml -= 2+bmap8;
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#endif
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for(i = b-1; i >= 0; --i) {
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#if EXCEP == 1 // Variable byte
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l = PAD8(n*i) + 2+bmap8 + PAD8(x*(bx-i));
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int v = PAD8(n*i) + 2 + x + vv, vx = 0;
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x += cnt[i]; vv+=cnt[i]+vb[i];
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VBB(cnt[i],i);
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if(v < l)
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l=v,vx=1;
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if(unlikely(l < ml))
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ml=l,b=i,fx=vx;
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#elif EXCEP == 2
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uint_t tin[P4D_MAX],*tp=tin;
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for(ip=in,c = 0; c < (n+63)/64;c++,ip+=64) {
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unsigned long long z = xmap[c];
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while(z) { unsigned x = ctz64(z); *tp++ = ip[x]; z ^= (1ull<<x); }
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}
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unsigned char out[2048],*op = TEMPLATE2(vsenc, USIZE)(tin, n, out);
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unsigned vv = op - out;
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l = PAD8(n*i) + PAD8(x*(bx-i))+2+bmap8;
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int v = PAD8(n*i) + 2 + x + vv, vx = 0;
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if(v < l) l=v,vx=1; if(unlikely(l < ml)) ml=l,b=i,fx=vx;
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x += cnt[i];
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for(c = 0; c < (n+63)/64;c++) xmap[c] |= smap[i][c];
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#else // fixed bitpack
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l = PAD8(n*i) + PAD8(x*(bx-i));
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x += cnt[i];
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unlikely(l < ml)?(ml=l,b=i):(ml=ml,b=b);
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#endif
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} //fx = 0;
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#if EXCEP > 0
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*pbx = fx?(USIZE+1):(bx - b);
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#else
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*pbx = bx - b;
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#endif
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return b;
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}
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#endif
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unsigned char *TEMPLATE2(_P4ENC, USIZE)(uint_t *__restrict in, unsigned n, unsigned char *__restrict out, unsigned b, unsigned bx) {
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if(!bx)
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return TEMPLATE2(BITPACK, USIZE)(in, n, out, b);
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uint_t msk = (1ull << b)-1,_in[P4D_MAX], inx[P4D_MAX*2];
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unsigned long long xmap[P4D_MAX/64] = { 0 };
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unsigned miss[P4D_MAX],i, xn, c;
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#define MISS { miss[xn] = i; xn += in[i] > msk; _in[i] = in[i] & msk; i++; }
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for(xn = i = 0; i != n&~3; ) { MISS; MISS; MISS; MISS; }
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while(i != n) MISS;
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for(i = 0; i != xn; ++i) {
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c = miss[i];
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xmap[c>>6] |= (1ull << (c&0x3f));
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inx[i] = in[c] >> b;
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}
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unsigned char *_out = out;
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#if EXCEP > 0
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if(bx <= USIZE) {
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#endif
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for(i = 0; i < (n+63)/64; i++) ctou64(out+i*8) = xmap[i]; out += PAD8(n);
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out = TEMPLATE2(bitpack, USIZE)(inx, xn, out, bx);
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out = TEMPLATE2(BITPACK, USIZE)(_in, n, out, b);
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#if EXCEP > 0
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}
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else {
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*out++ = xn;
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out = TEMPLATE2(BITPACK, USIZE)(_in, n, out, b);
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out = TEMPLATE2(vbenc, USIZE)(inx, xn, out);
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for(i = 0; i != xn; ++i)
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*out++ = miss[i];
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}
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#endif
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return out;
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}
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unsigned char *TEMPLATE2(P4ENC, USIZE)(uint_t *__restrict in, unsigned n, unsigned char *__restrict out) {
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unsigned bx, b = TEMPLATE2(_p4bits, USIZE)(in, n, &bx);
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#if EXCEP > 0
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if(bx <= USIZE) {
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P4SAVE(out, b, bx);
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} else *out++= 0x80|b<<1;
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#else
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P4SAVE(out, b, bx);
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#endif
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return TEMPLATE2(_P4ENC, USIZE)(in, n, out, b, bx);
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}
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/*#ifdef VSIZE
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#define CSIZE VSIZE
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#else
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#define CSIZE 128
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#endif
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unsigned char *TEMPLATE2(P4NENC, USIZE)(uint_t *__restrict in, unsigned n, unsigned char *__restrict out) {
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uint_t *ip;
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for(ip = in; ip != in+(n&~(CSIZE-1)); ip += CSIZE) { __builtin_prefetch(ip+512);
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out = TEMPLATE2(P4ENC, USIZE)(ip, CSIZE, out);
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}
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return TEMPLATE2(p4enc, USIZE)(ip, n&(CSIZE-1), out);
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}*/
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#pragma clang diagnostic pop
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#endif
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/*
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111 : 32 bits = bitpack b=32 if bits=0x1f EOB
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000 : bitpack = bitpack no exp b=0..5
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001 : vbyte b=0..5
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010 : exp equ. b=0..5 b,bitpack
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011 : bp. equal b=0..5 b,exp.
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1XX : EOB
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*/
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