liuyu/pgvector
1
0
Fork 0
mirror of https://github.com/pgvector/pgvector.git synced 2026-06-06 14:01:31 +08:00
Code Issues Packages Projects Releases Wiki Activity

Improved SetNewCenters [skip ci]

Browse Source
This commit is contained in:
Andrew Kane
2024-04-24 15:56:50 -07:00
parent 558953ca6b
commit fb6683ade7
1 changed files with 31 additions and 23 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
src/ivfkmeans.c
View File

@@ -308,40 +308,48 @@ SumCenters(VectorArray samples, VectorArray aggCenters, int *closestCenters, Ivf
}
}
static void
HalfvecSetNewCenter(const void *v, Vector * aggCenter)
{
HalfVector *newCenter = (HalfVector *) v;
for (int k = 0; k < aggCenter->dim; k++)
newCenter->x[k] = Float4ToHalfUnchecked(aggCenter->x[k]);
}
static void
BitSetNewCenter(const void *v, Vector * aggCenter)
{
VarBit *newCenter = (VarBit *) v;
unsigned char *nx = VARBITS(newCenter);
for (uint32 k = 0; k < VARBITBYTES(newCenter); k++)
nx[k] = 0;
for (int k = 0; k < aggCenter->dim; k++)
nx[k / 8] |= (aggCenter->x[k] > 0.5) << (7 - (k % 8));
}
/*
* Set new centers
*/
static void
SetNewCenters(VectorArray aggCenters, VectorArray newCenters, IvfflatType type)
{
int dimensions = aggCenters->dim;
int numCenters = aggCenters->maxlen;
void (*setNewCenter) (const void *v, Vector * aggCenter);
if (type == IVFFLAT_TYPE_HALFVEC)
{
for (int j = 0; j < numCenters; j++)
{
Vector *aggCenter = (Vector *) VectorArrayGet(aggCenters, j);
HalfVector *newCenter = (HalfVector *) VectorArrayGet(newCenters, j);
for (int k = 0; k < dimensions; k++)
newCenter->x[k] = Float4ToHalfUnchecked(aggCenter->x[k]);
}
}
setNewCenter = HalfvecSetNewCenter;
else if (type == IVFFLAT_TYPE_BIT)
setNewCenter = BitSetNewCenter;
else
return;
for (int j = 0; j < aggCenters->length; j++)
{
for (int j = 0; j < numCenters; j++)
{
Vector *aggCenter = (Vector *) VectorArrayGet(aggCenters, j);
VarBit *newCenter = (VarBit *) VectorArrayGet(newCenters, j);
unsigned char *nx = VARBITS(newCenter);
Vector *aggCenter = (Vector *) VectorArrayGet(aggCenters, j);
for (uint32 k = 0; k < VARBITBYTES(newCenter); k++)
nx[k] = 0;
for (int k = 0; k < dimensions; k++)
nx[k / 8] |= (aggCenter->x[k] > 0.5) << (7 - (k % 8));
}
setNewCenter(VectorArrayGet(newCenters, j), aggCenter);
}
}