daiduo/TurboPFor-Integer-Compression
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TurboPFor decode: Scalar + Direct Access, SIMD

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powturbo
2016-03-26 19:59:38 +01:00
parent 56b8aef2a7
commit 509edfaa27
1 changed files with 7 additions and 9 deletions
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16
vp4dd.h
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@ -77,16 +77,14 @@ static inline void p4dini(struct p4d *p4d, unsigned char *__restrict *pin, unsig
unsigned i = *(unsigned short *)in;
p4d->i = i;
*b = P4D_B(i);
*b = P4D_B(i);
p4d->bx = P4D_XB(i);
P4D_ININC(in,i);
*pin = in;
p4d->ex = in + P4D_PAD8(n*(*b));
p4d->xmap = (i&1)?(unsigned long long *)p4d->ex:xmap;
p4d->ex += (i&1)?8*P4DN:0;
p4d->cum[0] = 0;
for(i=1; i < P4DN; i++) p4d->cum[i] = p4d->cum[i-1] + popcnt64(p4d->xmap[i-1]);
P4D_ININC(in, i);
p4d->xmap = (i&1)?(unsigned long long *)in:xmap;
p4d->ex = in + ((i&1)?8*P4DN:0);
for(p4d->cum[0] = 0, i=1; i < P4DN; i++) p4d->cum[i] = p4d->cum[i-1] + popcnt64(p4d->xmap[i-1]);
*pin = p4d->ex + P4D_PAD8((p4d->cum[P4DN-1] + popcnt64(p4d->xmap[P4DN-1]))*p4d->bx);
p4d->oval = p4d->idx = -1;
}