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Guide to the PBLAS</TITLE>
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<A NAME="6905"> </A><H1><A NAME="SECTION041120000000000000000">Quick Reference
Guide to the PBLAS</A></H1>
<A NAME="chapqrefpblas"> </A>
<P>
An <EM>html</EM> version of this Quick Reference Guide<A NAME="6908"> </A>,
along with the leading
comments from each of the routines, is available via the ScaLAPACK homepage.
<BLOCKQUOTE> <TT>http://www.netlib.org/scalapack/index.html</TT>
</BLOCKQUOTE>
<P>
At the lowest level, the efficiency of the PBLAS
is determined by the local performance of the BLAS
and the BLACS. In addition, depending on the shape
of its input and output distributed matrices,
the PBLAS select the best algorithm in terms of
data transfer across the process grid. Transparent
to the user, this relatively simple selection
process ensures high efficiency independent of
the actual computation performed.
<P>
<TT>
<P>
<B>Level 1 PBLAS</B>
<PRE> dim scalar vector vector
P_SWAP ( N, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY )
P_SCAL ( N, ALPHA, X, IX, JX, DESCX, INCX )
P_COPY ( N, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY )
P_AXPY ( N, ALPHA, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY )
P_DOT ( N, DOT, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY )
P_DOTU ( N, DOTU, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY )
P_DOTC ( N, DOTC, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY )
P_NRM2 ( N, NORM2, X, IX, JX, DESCX, INCX )
P_ASUM ( N, ASUM, X, IX, JX, DESCX, INCX )
P_AMAX ( N, AMAX, INDX, X, IX, JX, DESCX, INCX )</PRE>
<P>
<B>Level 2 PBLAS</B>
<PRE> options dim scalar matrix vector scalar vector
P_GEMV ( TRANS, M, N, ALPHA, A, IA, JA, DESCA, X, IX, JX, DESCX, INCX, BETA, Y, IY, JY, DESCY, INCY )
P_HEMV ( UPLO, N, ALPHA, A, IA, JA, DESCA, X, IX, JX, DESCX, INCX, BETA, Y, IY, JY, DESCY, INCY )
P_SYMV ( UPLO, N, ALPHA, A, IA, JA, DESCA, X, IX, JX, DESCX, INCX, BETA, Y, IY, JY, DESCY, INCY )
P_TRMV ( UPLO, TRANS, DIAG, N, A, IA, JA, DESCA, X, IX, JX, DESCX, INCX )
P_TRSV ( UPLO, TRANS, DIAG, N, A, IA, JA, DESCA, X, IX, JX, DESCX, INCX )
options dim scalar vector vector matrix
P_GER ( M, N, ALPHA, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY, A, IA, JA, DESCA )
P_GERU ( M, N, ALPHA, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY, A, IA, JA, DESCA )
P_GERC ( M, N, ALPHA, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY, A, IA, JA, DESCA )
P_HER ( UPLO, N, ALPHA, X, IX, JX, DESCX, INCX, A, IA, JA, DESCA )
P_HER2 ( UPLO, N, ALPHA, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY, A, IA, JA, DESCA )
P_SYR ( UPLO, N, ALPHA, X, IX, JX, DESCX, INCX, A, IA, JA, DESCA )
P_SYR2 ( UPLO, N, ALPHA, X, IX, JX, DESCX, INCX, Y, IY, JY, DESCY, INCY, A, IA, JA, DESCA )</PRE>
<P>
<B>Level 3 PBLAS</B>
<PRE> options dim scalar matrix matrix scalar matrix
P_GEMM ( TRANSA, TRANSB, M, N, K, ALPHA, A, IA, JA, DESCA, B, IB, JB, DESCB, BETA, C, IC, JC, DESCC )
P_SYMM ( SIDE, UPLO, M, N, ALPHA, A, IA, JA, DESCA, B, IB, JB, DESCB, BETA, C, IC, JC, DESCC )
P_HEMM ( SIDE, UPLO, M, N, ALPHA, A, IA, JA, DESCA, B, IB, JB, DESCB, BETA, C, IC, JC, DESCC )
P_SYRK ( UPLO, TRANS, N, K, ALPHA, A, IA, JA, DESCA, BETA, C, IC, JC, DESCC )
P_HERK ( UPLO, TRANS, N, K, ALPHA, A, IA, JA, DESCA, BETA, C, IC, JC, DESCC )
P_SYR2K( UPLO, TRANS, N, K, ALPHA, A, IA, JA, DESCA, B, IB, JB, DESCB, BETA, C, IC, JC, DESCC )
P_HER2K( UPLO, TRANS, N, K, ALPHA, A, IA, JA, DESCA, B, IB, JB, DESCB, BETA, C, IC, JC, DESCC )
P_TRAN ( M, N, ALPHA, A, IA, JA, DESCA, BETA, C, IC, JC, DESCC )
P_TRANU( M, N, ALPHA, A, IA, JA, DESCA, BETA, C, IC, JC, DESCC )
P_TRANC( M, N, ALPHA, A, IA, JA, DESCA, BETA, C, IC, JC, DESCC )
P_TRMM ( SIDE, UPLO, TRANSA, DIAG, M, N, ALPHA, A, IA, JA, DESCA, B, IB, JB, DESCB )
P_TRSM ( SIDE, UPLO, TRANSA, DIAG, M, N, ALPHA, A, IA, JA, DESCA, B, IB, JB, DESCB )</PRE>
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<P><ADDRESS>
<I>Susan Blackford <BR>
Tue May 13 09:21:01 EDT 1997</I>
</ADDRESS>
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