ssp_blas3.c File Reference

Sparse BLAS3, using some dense BLAS3 operations. More...

#include "slu_sdefs.h"

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Functions
int	sp_sgemm (char *transa, char *transb, int m, int n, int k, float alpha, SuperMatrix *A, float *b, int ldb, float beta, float *c, int ldc)

Detailed Description

Copyright (c) 2003, The Regents of the University of California, through Lawrence Berkeley National Laboratory (subject to receipt of any required approvals from U.S. Dept. of Energy)

All rights reserved.

The source code is distributed under BSD license, see the file License.txt at the top-level directory.

– SuperLU routine (version 2.0) –
Univ. of California Berkeley, Xerox Palo Alto Research Center,
and Lawrence Berkeley National Lab.
November 15, 1997

Function Documentation

int sp_sgemm	(	char *	transa,
		char *	transb,
		int	m,
		int	n,
		int	k,
		float	alpha,
		SuperMatrix *	A,
		float *	b,
		int	ldb,
		float	beta,
		float *	c,
		int	ldc
	)

Purpose   

  sp_s performs one of the matrix-matrix operations

     C := alpha*op( A )*op( B ) + beta*C,

  where  op( X ) is one of

     op( X ) = X   or   op( X ) = X'   or   op( X ) = conjg( X' ),

  alpha and beta are scalars, and A, B and C are matrices, with op( A ) 
  an m by k matrix,  op( B )  a  k by n matrix and  C an m by n matrix.

Parameters   

  TRANSA - (input) char*
           On entry, TRANSA specifies the form of op( A ) to be used in 
           the matrix multiplication as follows:   
              TRANSA = 'N' or 'n',  op( A ) = A.   
              TRANSA = 'T' or 't',  op( A ) = A'.   
              TRANSA = 'C' or 'c',  op( A ) = conjg( A' ).   
           Unchanged on exit.

  TRANSB - (input) char*
           On entry, TRANSB specifies the form of op( B ) to be used in 
           the matrix multiplication as follows:   
              TRANSB = 'N' or 'n',  op( B ) = B.   
              TRANSB = 'T' or 't',  op( B ) = B'.   
              TRANSB = 'C' or 'c',  op( B ) = conjg( B' ).   
           Unchanged on exit.

  M      - (input) int   
           On entry,  M  specifies  the number of rows of the matrix 
          op( A ) and of the matrix C.  M must be at least zero. 
          Unchanged on exit.

  N      - (input) int
           On entry,  N specifies the number of columns of the matrix 
          op( B ) and the number of columns of the matrix C. N must be 
          at least zero.
          Unchanged on exit.

  K      - (input) int
           On entry, K specifies the number of columns of the matrix 
          op( A ) and the number of rows of the matrix op( B ). K must 
          be at least  zero.   
          Unchanged on exit.

  ALPHA  - (input) float
           On entry, ALPHA specifies the scalar alpha.

  A      - (input) SuperMatrix*
           Matrix A with a sparse format, of dimension (A->nrow, A->ncol).
           Currently, the type of A can be:
               Stype = NC or NCP; Dtype = SLU_S; Mtype = GE. 
           In the future, more general A can be handled.

  B      - FLOAT PRECISION array of DIMENSION ( LDB, kb ), where kb is 
           n when TRANSB = 'N' or 'n',  and is  k otherwise.   
           Before entry with  TRANSB = 'N' or 'n',  the leading k by n 
           part of the array B must contain the matrix B, otherwise 
           the leading n by k part of the array B must contain the 
           matrix B.   
           Unchanged on exit.

  LDB    - (input) int
           On entry, LDB specifies the first dimension of B as declared 
           in the calling (sub) program. LDB must be at least max( 1, n ).  
           Unchanged on exit.

  BETA   - (input) float
           On entry, BETA specifies the scalar beta. When BETA is   
           supplied as zero then C need not be set on input.

  C      - FLOAT PRECISION array of DIMENSION ( LDC, n ).   
           Before entry, the leading m by n part of the array C must 
           contain the matrix C,  except when beta is zero, in which 
           case C need not be set on entry.   
           On exit, the array C is overwritten by the m by n matrix 
          ( alpha*op( A )*B + beta*C ).

  LDC    - (input) int
           On entry, LDC specifies the first dimension of C as declared 
           in the calling (sub)program. LDC must be at least max(1,m).   
           Unchanged on exit.

  ==== Sparse Level 3 Blas routine.   

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