97 lines
2.2 KiB
FortranFixed
97 lines
2.2 KiB
FortranFixed
SUBROUTINE ICOPY( N, SX, INCX, SY, INCY )
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*
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* -- LAPACK auxiliary test routine (version 3.1) --
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* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
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* October 2006
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*
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* .. Scalar Arguments ..
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INTEGER INCX, INCY, N
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* ..
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* .. Array Arguments ..
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INTEGER SX( * ), SY( * )
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* ..
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*
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* Purpose
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* =======
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*
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* ICOPY copies an integer vector x to an integer vector y.
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* Uses unrolled loops for increments equal to 1.
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*
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* Arguments
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* =========
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*
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* N (input) INTEGER
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* The length of the vectors SX and SY.
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*
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* SX (input) INTEGER array, dimension (1+(N-1)*abs(INCX))
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* The vector X.
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*
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* INCX (input) INTEGER
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* The spacing between consecutive elements of SX.
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*
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* SY (output) INTEGER array, dimension (1+(N-1)*abs(INCY))
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* The vector Y.
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*
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* INCY (input) INTEGER
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* The spacing between consecutive elements of SY.
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*
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* =====================================================================
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*
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* .. Local Scalars ..
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INTEGER I, IX, IY, M, MP1
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* ..
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* .. Intrinsic Functions ..
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INTRINSIC MOD
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* ..
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* .. Executable Statements ..
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*
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IF( N.LE.0 )
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$ RETURN
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IF( INCX.EQ.1 .AND. INCY.EQ.1 )
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$ GO TO 20
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*
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* Code for unequal increments or equal increments not equal to 1
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*
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IX = 1
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IY = 1
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IF( INCX.LT.0 )
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$ IX = ( -N+1 )*INCX + 1
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IF( INCY.LT.0 )
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$ IY = ( -N+1 )*INCY + 1
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DO 10 I = 1, N
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SY( IY ) = SX( IX )
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IX = IX + INCX
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IY = IY + INCY
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10 CONTINUE
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RETURN
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*
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* Code for both increments equal to 1
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*
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* Clean-up loop
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*
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20 CONTINUE
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M = MOD( N, 7 )
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IF( M.EQ.0 )
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$ GO TO 40
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DO 30 I = 1, M
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SY( I ) = SX( I )
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30 CONTINUE
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IF( N.LT.7 )
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$ RETURN
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40 CONTINUE
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MP1 = M + 1
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DO 50 I = MP1, N, 7
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SY( I ) = SX( I )
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SY( I+1 ) = SX( I+1 )
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SY( I+2 ) = SX( I+2 )
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SY( I+3 ) = SX( I+3 )
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SY( I+4 ) = SX( I+4 )
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SY( I+5 ) = SX( I+5 )
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SY( I+6 ) = SX( I+6 )
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50 CONTINUE
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RETURN
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*
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* End of ICOPY
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*
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END
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