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WCOPY.FOR
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1991-04-13
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24 lines
SUBROUTINE WCOPY (N, XR, XI, INCX, YR, YI, INCY)
IMPLICIT NONE
C
INTEGER N, INCX, INCY
DOUBLE PRECISION XR(*), XI(*), YR(*), YI(*)
C
INTEGER I, IX, IY
C
C
IF (N.LE.0) RETURN
IX = 1
IY = 1
IF (INCX.LT.0) IX = (-N+1)*INCX+1
IF (INCY.LT.0) IY = (-N+1)*INCY+1
DO 10 I = 1, N
YR(IY) = XR(IX)
YI(IY) = XI(IX)
IX = IX+INCX
IY = IY+INCY
10 CONTINUE
C
RETURN
END