BI_HypBR.c

Go to the documentation of this file.

#include "Bdef.h"
 
int BI_HypBR(BLACSCONTEXT *ctxt, BLACBUFF *bp, SDRVPTR send, int src)
{
   void BI_Srecv(BLACSCONTEXT *, int, int, BLACBUFF *);
   int relnode, bit, Np, Iam, msgid;
 
   Np = ctxt->scp->Np;
   Iam = ctxt->scp->Iam;
   msgid = Mscopeid(ctxt);
 
   for (bit=2; bit < Np; bit <<= 1);
   if (bit^Np) return(NPOW2);  /* not a power of 2 */
   relnode = Iam ^ src;
 
   BI_Srecv(ctxt, BANYNODE, msgid, bp);
   for(bit=1; (bit^Np); bit <<= 1)
      if (bit > relnode) send(ctxt, Iam^bit, msgid, bp);
 
   return(0);
}