Index: ext/rtree/rtree.c
==================================================================
--- ext/rtree/rtree.c
+++ ext/rtree/rtree.c
@@ -1076,27 +1076,50 @@
 ){
   int i;                                                /* Loop counter */
   sqlite3_rtree_query_info *pInfo = pConstraint->pInfo; /* Callback info */
   int nCoord = pInfo->nCoord;                           /* No. of coordinates */
   int rc;                                             /* Callback return code */
+  RtreeCoord c;                                       /* Translator union */
   sqlite3_rtree_dbl aCoord[RTREE_MAX_DIMENSIONS*2];   /* Decoded coordinates */
 
   assert( pConstraint->op==RTREE_MATCH || pConstraint->op==RTREE_QUERY );
   assert( nCoord==2 || nCoord==4 || nCoord==6 || nCoord==8 || nCoord==10 );
 
   if( pConstraint->op==RTREE_QUERY && pSearch->iLevel==1 ){
     pInfo->iRowid = readInt64(pCellData);
   }
-  assert( nCoord>=2 && (nCoord&1)==0 );
-  i = 0;
-  do{
-    pCellData += 8;
-    assert( ((((char*)pCellData) - (char*)0)&3)==0 );  /* 4-byte aligned */
-    RTREE_DECODE_COORD(eInt, pCellData, aCoord[i]);
-    RTREE_DECODE_COORD(eInt, (pCellData+4), aCoord[i+1]);
-    i+= 2;
-  }while( i<nCoord );
+  pCellData += 8;
+#ifndef SQLITE_RTREE_INT_ONLY
+  if( eInt==0 ){
+    switch( nCoord ){
+      case 10:  readCoord(pCellData+36, &c); aCoord[9] = c.f;
+                readCoord(pCellData+32, &c); aCoord[8] = c.f;
+      case 8:   readCoord(pCellData+28, &c); aCoord[7] = c.f;
+                readCoord(pCellData+24, &c); aCoord[6] = c.f;
+      case 6:   readCoord(pCellData+20, &c); aCoord[5] = c.f;
+                readCoord(pCellData+16, &c); aCoord[4] = c.f;
+      case 4:   readCoord(pCellData+12, &c); aCoord[3] = c.f;
+                readCoord(pCellData+8,  &c); aCoord[2] = c.f;
+      default:  readCoord(pCellData+4,  &c); aCoord[1] = c.f;
+                readCoord(pCellData,    &c); aCoord[0] = c.f;
+    }
+  }else
+#endif
+  {
+    switch( nCoord ){
+      case 10:  readCoord(pCellData+36, &c); aCoord[9] = c.i;
+                readCoord(pCellData+32, &c); aCoord[8] = c.i;
+      case 8:   readCoord(pCellData+28, &c); aCoord[7] = c.i;
+                readCoord(pCellData+24, &c); aCoord[6] = c.i;
+      case 6:   readCoord(pCellData+20, &c); aCoord[5] = c.i;
+                readCoord(pCellData+16, &c); aCoord[4] = c.i;
+      case 4:   readCoord(pCellData+12, &c); aCoord[3] = c.i;
+                readCoord(pCellData+8,  &c); aCoord[2] = c.i;
+      default:  readCoord(pCellData+4,  &c); aCoord[1] = c.i;
+                readCoord(pCellData,    &c); aCoord[0] = c.i;
+    }
+  }
   if( pConstraint->op==RTREE_MATCH ){
     rc = pConstraint->u.xGeom((sqlite3_rtree_geometry*)pInfo,
                               nCoord, aCoord, &i);
     if( i==0 ) *peWithin = NOT_WITHIN;
     *prScore = RTREE_ZERO;