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#include "Bdef.h"
#if (INTFACE == C_CALL)
void Cstrbs2d(int ConTxt, char *scope, char *top, char *uplo, char *diag,
int m, int n, float *A, int lda)
#else
F_VOID_FUNC strbs2d_(int *ConTxt, F_CHAR scope, F_CHAR top, F_CHAR uplo,
F_CHAR diag, int *m, int *n, float *A, int *lda)
#endif
/*
* -- V1.1 BLACS routine --
* University of Tennessee, May 1, 1996
* Written by Clint Whaley.
*
* Purpose
* =======
* Broadcast/send for trapezoidal real 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.
*
* UPLO (input) Ptr to char
* Specifies the part of the matrix to be sent.
* = 'U': Upper trapezoidal part
* ELSE : Lower trapezoidal part
*
* DIAG (input) Ptr to char
* Specifies whether the matrix is unit diagonal or not.
* = 'U': Matrix is unit diagonal, diagonal not communicated.
* ELSE : Matrix is not unit diagonal, diagonal is communicated.
*
* 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 (input) Ptr to real two dimensional array
* The m by n matrix A. Fortran77 (column-major) storage
* assumed.
* If UPLO = 'U', only the upper trapezoid is accessed;
* if UPLO = 'L', only the lower trapezoid is accessed.
*
* LDA (input) Ptr to int
* The leading dimension of the array A. LDA >= M.
*
* ------------------------------------------------------------------------
*/
{
void BI_ArgCheck(int, int, char *, char, char, char, int, int, int, int,
int *, int *);
int BI_HypBS(BLACSCONTEXT *, BLACBUFF *, SDRVPTR);
void BI_IdringBS(BLACSCONTEXT *, BLACBUFF *, SDRVPTR, int);
void BI_SringBS(BLACSCONTEXT *, BLACBUFF *, SDRVPTR);
void BI_MpathBS(BLACSCONTEXT *, BLACBUFF *, SDRVPTR, int);
void BI_TreeBS(BLACSCONTEXT *, BLACBUFF *, SDRVPTR, int);
void BI_UpdateBuffs(BLACBUFF *);
BLACBUFF *BI_GetBuff(int);
int BI_BuffIsFree(BLACBUFF *, int);
BI_MPI_Datatype BI_GetMpiTrType(BLACSCONTEXT *, char, char, int, int, int,
BI_MPI_Datatype, int *);
BLACBUFF *BI_Pack(BLACSCONTEXT *, BVOID *, BLACBUFF *, BI_MPI_Datatype);
void BI_Ssend(BLACSCONTEXT *, int, int, BLACBUFF *);
void BI_Asend(BLACSCONTEXT *, int, int, BLACBUFF *);
char ttop, tscope, tuplo, tdiag;
int error, tlda;
BI_MPI_Datatype MatTyp;
SDRVPTR send;
BLACBUFF *bp;
BLACSCONTEXT *ctxt;
extern BLACBUFF BI_AuxBuff, *BI_ActiveQ;
/*
* get context, lowcase char variables, and perform parameter checking
*/
MGetConTxt(Mpval(ConTxt), ctxt);
ttop = F2C_CharTrans(top);
ttop = Mlowcase(ttop);
tscope = F2C_CharTrans(scope);
tscope = Mlowcase(tscope);
tuplo = F2C_CharTrans(uplo);
tuplo = Mlowcase(tuplo);
tdiag = F2C_CharTrans(diag);
tdiag = Mlowcase(tdiag);
#if (BlacsDebugLvl > 0)
BI_ArgCheck(Mpval(ConTxt), RT_BS, __FILE__, 'a', tuplo, tdiag, Mpval(m),
Mpval(n), Mpval(lda), 0, NULL, NULL);
#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(lda) < Mpval(m)) tlda = Mpval(m);
else tlda = Mpval(lda);
switch(tscope)
{
case 'r':
ctxt->scp = &ctxt->rscp;
break;
case 'c':
ctxt->scp = &ctxt->cscp;
break;
case 'a':
ctxt->scp = &ctxt->ascp;
break;
default:
BI_BlacsErr(Mpval(ConTxt), __LINE__, __FILE__, "Unknown scope '%c'",
tscope);
}
MatTyp = BI_GetMpiTrType(ctxt, tuplo, tdiag, Mpval(m), Mpval(n), tlda,
BI_MPI_FLOAT, &BI_AuxBuff.N);
/*
* If using default topology, use MPI native broadcast
*/
if (ttop == ' ')
{
BI_MPI_Bcast(A, BI_AuxBuff.N, MatTyp, ctxt->scp->Iam, 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
*/
#ifdef MpiBuffGood
send = BI_Ssend;
BI_AuxBuff.Buff = (char *) A;
BI_AuxBuff.dtype = MatTyp;
bp = &BI_AuxBuff;
#endif
/*
* Pack and use non-blocking sends for broadcast if MPI's data types aren't
* more efficient
*/
#ifndef MpiBuffGood
send = BI_Asend;
bp = BI_Pack(ctxt, (BVOID *) A, NULL, MatTyp);
#endif
/*
* Call correct topology for BS/BR
*/
switch(ttop)
{
case 'h':
error = BI_HypBS(ctxt, bp, send);
if (error == NPOW2) BI_TreeBS(ctxt, bp, send, 2);
break;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
BI_TreeBS(ctxt, bp, send, ttop-47);
break;
case 't':
BI_TreeBS(ctxt, bp, send, ctxt->Nb_bs);
break;
case 'i':
BI_IdringBS(ctxt, bp, send, 1);
break;
case 'd':
BI_IdringBS(ctxt, bp, send, -1);
break;
case 's':
BI_SringBS(ctxt, bp, send);
break;
case 'f':
BI_MpathBS(ctxt, bp, send, FULLCON);
break;
case 'm':
BI_MpathBS(ctxt, bp, send, ctxt->Nr_bs);
break;
default :
BI_BlacsErr(Mpval(ConTxt), __LINE__, __FILE__, "Unknown topology '%c'",
ttop);
}
BI_MPI_Type_free(&MatTyp, error);
if (bp == &BI_AuxBuff)
{
if (BI_ActiveQ) BI_UpdateBuffs(NULL);
}
else BI_UpdateBuffs(bp);
} /* end strbs2d_ */
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