Annotation of rpl/lapack/lapack/zlacpy.f, revision 1.1
1.1 ! bertrand 1: SUBROUTINE ZLACPY( UPLO, M, N, A, LDA, B, LDB )
! 2: *
! 3: * -- LAPACK auxiliary routine (version 3.2) --
! 4: * -- LAPACK is a software package provided by Univ. of Tennessee, --
! 5: * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
! 6: * November 2006
! 7: *
! 8: * .. Scalar Arguments ..
! 9: CHARACTER UPLO
! 10: INTEGER LDA, LDB, M, N
! 11: * ..
! 12: * .. Array Arguments ..
! 13: COMPLEX*16 A( LDA, * ), B( LDB, * )
! 14: * ..
! 15: *
! 16: * Purpose
! 17: * =======
! 18: *
! 19: * ZLACPY copies all or part of a two-dimensional matrix A to another
! 20: * matrix B.
! 21: *
! 22: * Arguments
! 23: * =========
! 24: *
! 25: * UPLO (input) CHARACTER*1
! 26: * Specifies the part of the matrix A to be copied to B.
! 27: * = 'U': Upper triangular part
! 28: * = 'L': Lower triangular part
! 29: * Otherwise: All of the matrix A
! 30: *
! 31: * M (input) INTEGER
! 32: * The number of rows of the matrix A. M >= 0.
! 33: *
! 34: * N (input) INTEGER
! 35: * The number of columns of the matrix A. N >= 0.
! 36: *
! 37: * A (input) COMPLEX*16 array, dimension (LDA,N)
! 38: * The m by n matrix A. If UPLO = 'U', only the upper trapezium
! 39: * is accessed; if UPLO = 'L', only the lower trapezium is
! 40: * accessed.
! 41: *
! 42: * LDA (input) INTEGER
! 43: * The leading dimension of the array A. LDA >= max(1,M).
! 44: *
! 45: * B (output) COMPLEX*16 array, dimension (LDB,N)
! 46: * On exit, B = A in the locations specified by UPLO.
! 47: *
! 48: * LDB (input) INTEGER
! 49: * The leading dimension of the array B. LDB >= max(1,M).
! 50: *
! 51: * =====================================================================
! 52: *
! 53: * .. Local Scalars ..
! 54: INTEGER I, J
! 55: * ..
! 56: * .. External Functions ..
! 57: LOGICAL LSAME
! 58: EXTERNAL LSAME
! 59: * ..
! 60: * .. Intrinsic Functions ..
! 61: INTRINSIC MIN
! 62: * ..
! 63: * .. Executable Statements ..
! 64: *
! 65: IF( LSAME( UPLO, 'U' ) ) THEN
! 66: DO 20 J = 1, N
! 67: DO 10 I = 1, MIN( J, M )
! 68: B( I, J ) = A( I, J )
! 69: 10 CONTINUE
! 70: 20 CONTINUE
! 71: *
! 72: ELSE IF( LSAME( UPLO, 'L' ) ) THEN
! 73: DO 40 J = 1, N
! 74: DO 30 I = J, M
! 75: B( I, J ) = A( I, J )
! 76: 30 CONTINUE
! 77: 40 CONTINUE
! 78: *
! 79: ELSE
! 80: DO 60 J = 1, N
! 81: DO 50 I = 1, M
! 82: B( I, J ) = A( I, J )
! 83: 50 CONTINUE
! 84: 60 CONTINUE
! 85: END IF
! 86: *
! 87: RETURN
! 88: *
! 89: * End of ZLACPY
! 90: *
! 91: END
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