BI_HypBR.c File Reference

#include "Bdef.h"

Go to the source code of this file.

Functions
Int	BI_HypBR (BLACSCONTEXT *ctxt, BLACBUFF *bp, SDRVPTR send, Int src)

Function Documentation

BI_HypBR()

Int BI_HypBR	(	BLACSCONTEXT *	ctxt,
		BLACBUFF *	bp,
		SDRVPTR	send,
		Int	src )

Definition at line 3 of file BI_HypBR.c.

{
   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);
}