Annotation of rpl/lapack/blas/zcopy.f, revision 1.7
1.1 bertrand 1: SUBROUTINE ZCOPY(N,ZX,INCX,ZY,INCY)
2: * .. Scalar Arguments ..
3: INTEGER INCX,INCY,N
4: * ..
5: * .. Array Arguments ..
6: DOUBLE COMPLEX ZX(*),ZY(*)
7: * ..
8: *
9: * Purpose
10: * =======
11: *
12: * ZCOPY copies a vector, x, to a vector, y.
13: *
14: * Further Details
15: * ===============
16: *
17: * jack dongarra, linpack, 4/11/78.
18: * modified 12/3/93, array(1) declarations changed to array(*)
19: *
20: * =====================================================================
21: *
22: * .. Local Scalars ..
23: INTEGER I,IX,IY
24: * ..
25: IF (N.LE.0) RETURN
1.7 ! bertrand 26: IF (INCX.EQ.1 .AND. INCY.EQ.1) THEN
! 27: *
! 28: * code for both increments equal to 1
! 29: *
! 30: DO I = 1,N
! 31: ZY(I) = ZX(I)
! 32: END DO
! 33: ELSE
1.1 bertrand 34: *
35: * code for unequal increments or equal increments
36: * not equal to 1
37: *
1.7 ! bertrand 38: IX = 1
! 39: IY = 1
! 40: IF (INCX.LT.0) IX = (-N+1)*INCX + 1
! 41: IF (INCY.LT.0) IY = (-N+1)*INCY + 1
! 42: DO I = 1,N
! 43: ZY(IY) = ZX(IX)
! 44: IX = IX + INCX
! 45: IY = IY + INCY
! 46: END DO
! 47: END IF
1.1 bertrand 48: RETURN
49: END
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