INTEGER FUNCTION ISAMAX( N, DX, INCX ) **************************************************************************** * * * DATA PARALLEL BLAS based on MPL * * * * Version 1.0 1/9-92 , * * For MasPar MP-1 computers * * * * para//ab, University of Bergen, NORWAY * * * * These programs must be called using F90 style array syntax. * * Note that the F77 style calling sequence has been retained * * in this version for compatibility reasons, be aware that * * parameters related to the array dimensions and shape therefore may * * be redundant and without any influence. * * The calling sequence may be changed in a future version. * * Please report any BUGs, ideas for improvement or other * * comments to * * adm@parallab.uib.no * * * * Future versions may then reflect your suggestions. * * The most current version of this software is available * * from netlib@nac.no , send the message `send index from maspar' * * * * REVISIONS: * * * **************************************************************************** * * finds the index of element having max. absolute value. * jack dongarra, linpack, 3/11/78. * * .. Scalar Arguments .. INTEGER INCX, N * .. * .. Array Arguments .. REAL, array(:) :: DX * .. * .. Local Scalars .. INTEGER IX,JX,isatmp * .. * .. Intrinsic Functions .. INTRINSIC ABS * .. cmpf mpl mpl_isamax cmpf ondpu dx * .. Executable Statements .. * c IsAMAX = 0 IF( N.LT.1 ) $ RETURN IsAMAX = 1 IF( N.EQ.1 ) $ RETURN ix = abs(incx) IF( IX.EQ.1 ) then * * code for increment equal to 1 * * call mpl_isamax(n,dx,isatmp) else * * code for increment not equal to 1 * jx = ix * ( n-1 ) + 1 call mpl_isamax(n,dx(1:jx:ix),isatmp) end if * isamax = isatmp * RETURN * * End of IDAMAX. * END