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#include "Bdef.h"
#if (INTFACE == C_CALL)
void Czgebr2d(int ConTxt, char *scope, char *top, int m, int n, double *A,
int lda, int rsrc, int csrc)
#else
F_VOID_FUNC zgebr2d_(int *ConTxt, F_CHAR scope, F_CHAR top, int *m, int *n,
double *A, int *lda, int *rsrc, int *csrc)
#endif
/*
* -- V1.1 BLACS routine --
* University of Tennessee, May 1, 1996
* Written by Clint Whaley.
*
* Purpose
* =======
* Broadcast/receive for general double complex arrays.
*
* Arguments
* =========
*
* ConTxt (input) Ptr to int
* Index into MyConTxts00 (my contexts array).
*
* SCOPE (input) Ptr to char
* Limit the scope of the operation.
* = 'R' : Operation is performed by a process row.
* = 'C' : Operation is performed by a process column.
* = 'A' : Operation is performed by all processes in grid.
*
* TOP (input) Ptr to char
* Controls fashion in which messages flow within the operation.
*
* M (input) Ptr to int
* The number of rows of the matrix A. M >= 0.
*
* N (input) Ptr to int
* The number of columns of the matrix A. N >= 0.
*
* A (output) Ptr to double complex two dimensional array
* The m by n matrix A. Fortran77 (column-major) storage
* assumed.
*
* LDA (input) Ptr to int
* The leading dimension of the array A. LDA >= M.
*
*
* RSRC (input) Ptr to int
* The process row of the source of the matrix.
*
* CSRC (input) Ptr to int
* The process column of the source of the matrix.
*
*
* ------------------------------------------------------------------------
*/
{
void BI_ArgCheck(int, int, char *, char, char, char, int, int, int, int,
int *, int *);
int BI_HypBR(BLACSCONTEXT *, BLACBUFF *, SDRVPTR, int);
void BI_IdringBR(BLACSCONTEXT *, BLACBUFF *, SDRVPTR, int, int);
void BI_SringBR(BLACSCONTEXT *, BLACBUFF *, SDRVPTR, int);
void BI_MpathBR(BLACSCONTEXT *, BLACBUFF *, SDRVPTR, int, int);
void BI_TreeBR(BLACSCONTEXT *, BLACBUFF *, SDRVPTR, int, int);
void BI_UpdateBuffs(BLACBUFF *);
BLACBUFF *BI_GetBuff(int);
int BI_BuffIsFree(BLACBUFF *, int);
BI_MPI_Datatype BI_GetMpiGeType(BLACSCONTEXT *, int, int, int,
BI_MPI_Datatype, int *);
void BI_Unpack(BLACSCONTEXT *, BVOID *, BLACBUFF *, BI_MPI_Datatype);
void BI_Ssend(BLACSCONTEXT *, int, int, BLACBUFF *);
void BI_Asend(BLACSCONTEXT *, int, int, BLACBUFF *);
BLACSCONTEXT *ctxt;
BLACBUFF *bp=NULL;
SDRVPTR send;
BI_MPI_Datatype MatTyp;
int length, src, tlda, error, one=1;
char ttop, tscope;
extern BLACBUFF BI_AuxBuff, *BI_ActiveQ;
MGetConTxt(Mpval(ConTxt), ctxt);
ttop = F2C_CharTrans(top);
ttop = Mlowcase(ttop);
tscope = F2C_CharTrans(scope);
tscope = Mlowcase(tscope);
#if (BlacsDebugLvl > 0)
BI_ArgCheck(Mpval(ConTxt), RT_BR, __FILE__, tscope, 'u', 'u', Mpval(m),
Mpval(n), Mpval(lda), 1, Mpaddress(rsrc), Mpaddress(csrc));
#endif
/*
* If the user has set the default broadcast topology, use it instead of
* BLACS default
*/
#ifdef DefBSTop
if (ttop == ' ') ttop = DefBSTop;
#endif
if (Mpval(m) <= Mpval(lda)) tlda = Mpval(lda);
else tlda = Mpval(m);
switch(tscope)
{
case 'r':
ctxt->scp = &ctxt->rscp;
src = Mpval(csrc);
break;
case 'c':
ctxt->scp = &ctxt->cscp;
src = Mpval(rsrc);
break;
case 'a':
ctxt->scp = &ctxt->ascp;
src = Mvkpnum(ctxt, Mpval(rsrc), Mpval(csrc));
break;
default:
BI_BlacsErr(Mpval(ConTxt), __LINE__, __FILE__, "Unknown scope '%c'",
tscope);
}
MatTyp = BI_GetMpiGeType(ctxt, Mpval(m), Mpval(n), tlda,
BI_MPI_DOUBLE_COMPLEX, &BI_AuxBuff.N);
/*
* If using default topology, use MPI native broadcast
*/
if (ttop == ' ')
{
BI_MPI_Bcast(A, BI_AuxBuff.N, MatTyp, src, ctxt->scp->comm, error);
BI_MPI_Type_free(&MatTyp, error);
if (BI_ActiveQ) BI_UpdateBuffs(NULL);
return;
}
/*
* If MPI handles non-contiguous buffering well, always use MPI data types
* instead of packing
*/
#ifndef MpiBuffGood
/*
* If A is contiguous, receive and send directly to/from it
*/
else if ( (tlda == Mpval(m)) || (Mpval(n) == 1) )
{
#endif
send = BI_Ssend;
BI_AuxBuff.Buff = (char *) A;
BI_AuxBuff.dtype = MatTyp;
bp = &BI_AuxBuff;
#ifndef MpiBuffGood
}
/*
* If A is not contiguous, we receive message as packed so it can be
* forwarded without further system intervention
*/
else
{
send = BI_Asend;
BI_MPI_Pack_size(one, MatTyp, ctxt->scp->comm, &length, error);
bp = BI_GetBuff(length);
bp->N = length;
bp->dtype = BI_MPI_PACKED;
#if ZeroByteTypeBug
if (MatTyp == BI_MPI_BYTE)
{
send = BI_Ssend;
bp->N = 0;
bp->dtype = BI_MPI_BYTE;
}
#endif
}
#endif
switch(ttop)
{
case 'h':
error = BI_HypBR(ctxt, bp, send, src);
if (error == NPOW2) BI_TreeBR(ctxt, bp, send, src, 2);
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
BI_TreeBR(ctxt, bp, send, src, ttop-47);
break;
case 't':
BI_TreeBR(ctxt, bp, send, src, ctxt->Nb_bs);
break;
case 'i':
BI_IdringBR(ctxt, bp, send, src, 1);
break;
case 'd':
BI_IdringBR(ctxt, bp, send, src, -1);
break;
case 's':
BI_SringBR(ctxt, bp, send, src);
break;
case 'm':
BI_MpathBR(ctxt, bp, send, src, ctxt->Nr_bs);
break;
case 'f':
BI_MpathBR(ctxt, bp, send, src, FULLCON);
break;
default :
BI_BlacsErr(Mpval(ConTxt), __LINE__, __FILE__, "Unknown topology '%c'",
ttop);
}
/*
* If we buffered, unpack.
*/
#ifndef MpiBuffGood
if (bp != &BI_AuxBuff)
{
BI_Unpack(ctxt, (BVOID *) A, bp, MatTyp);
BI_UpdateBuffs(bp);
}
else
#endif
{
BI_MPI_Type_free(&MatTyp, error);
if (BI_ActiveQ) BI_UpdateBuffs(NULL);
}
}
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