Mercurial > octave-nkf
view libcruft/blas/csscal.f @ 7961:a5d1e27ee1f4 ss-3-1-51
3.1.51 snapshot
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 22 Jul 2008 11:40:48 -0400 |
parents | 82be108cc558 |
children |
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SUBROUTINE CSSCAL(N,SA,CX,INCX) * .. Scalar Arguments .. REAL SA INTEGER INCX,N * .. * .. Array Arguments .. COMPLEX CX(*) * .. * * Purpose * ======= * * scales a complex vector by a real constant. * jack dongarra, linpack, 3/11/78. * modified 3/93 to return if incx .le. 0. * modified 12/3/93, array(1) declarations changed to array(*) * * * .. Local Scalars .. INTEGER I,NINCX * .. * .. Intrinsic Functions .. INTRINSIC AIMAG,CMPLX,REAL * .. IF (N.LE.0 .OR. INCX.LE.0) RETURN IF (INCX.EQ.1) GO TO 20 * * code for increment not equal to 1 * NINCX = N*INCX DO 10 I = 1,NINCX,INCX CX(I) = CMPLX(SA*REAL(CX(I)),SA*AIMAG(CX(I))) 10 CONTINUE RETURN * * code for increment equal to 1 * 20 DO 30 I = 1,N CX(I) = CMPLX(SA*REAL(CX(I)),SA*AIMAG(CX(I))) 30 CONTINUE RETURN END