Mercurial > octave-nkf
view libcruft/lapack/clacgv.f @ 7789:82be108cc558
First attempt at single precision tyeps
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corrections to qrupdate single precision routines
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prefer demotion to single over promotion to double
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Add single precision support to log2 function
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Trivial PROJECT file update
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Cache optimized hermitian/transpose methods
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Add tests for tranpose/hermitian and ChangeLog entry for new transpose code
| author | David Bateman <dbateman@free.fr> |
|---|---|
| date | Sun, 27 Apr 2008 22:34:17 +0200 |
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| children |
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SUBROUTINE CLACGV( N, X, INCX ) * * -- LAPACK auxiliary routine (version 3.1) -- * Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. * November 2006 * * .. Scalar Arguments .. INTEGER INCX, N * .. * .. Array Arguments .. COMPLEX X( * ) * .. * * Purpose * ======= * * CLACGV conjugates a complex vector of length N. * * Arguments * ========= * * N (input) INTEGER * The length of the vector X. N >= 0. * * X (input/output) COMPLEX array, dimension * (1+(N-1)*abs(INCX)) * On entry, the vector of length N to be conjugated. * On exit, X is overwritten with conjg(X). * * INCX (input) INTEGER * The spacing between successive elements of X. * * ===================================================================== * * .. Local Scalars .. INTEGER I, IOFF * .. * .. Intrinsic Functions .. INTRINSIC CONJG * .. * .. Executable Statements .. * IF( INCX.EQ.1 ) THEN DO 10 I = 1, N X( I ) = CONJG( X( I ) ) 10 CONTINUE ELSE IOFF = 1 IF( INCX.LT.0 ) $ IOFF = 1 - ( N-1 )*INCX DO 20 I = 1, N X( IOFF ) = CONJG( X( IOFF ) ) IOFF = IOFF + INCX 20 CONTINUE END IF RETURN * * End of CLACGV * END