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First attempt at single precision tyeps * * * corrections to qrupdate single precision routines * * * prefer demotion to single over promotion to double * * * Add single precision support to log2 function * * * Trivial PROJECT file update * * * Cache optimized hermitian/transpose methods * * * Add tests for tranpose/hermitian and ChangeLog entry for new transpose code
author David Bateman <dbateman@free.fr>
date Sun, 27 Apr 2008 22:34:17 +0200
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1 SUBROUTINE CLACPY( UPLO, M, N, A, LDA, B, LDB )
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2 *
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3 * -- LAPACK auxiliary routine (version 3.1) --
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4 * Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd..
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5 * November 2006
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6 *
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7 * .. Scalar Arguments ..
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8 CHARACTER UPLO
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9 INTEGER LDA, LDB, M, N
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10 * ..
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11 * .. Array Arguments ..
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12 COMPLEX A( LDA, * ), B( LDB, * )
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13 * ..
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14 *
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15 * Purpose
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16 * =======
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17 *
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18 * CLACPY copies all or part of a two-dimensional matrix A to another
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19 * matrix B.
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20 *
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21 * Arguments
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22 * =========
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23 *
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24 * UPLO (input) CHARACTER*1
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25 * Specifies the part of the matrix A to be copied to B.
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26 * = 'U': Upper triangular part
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27 * = 'L': Lower triangular part
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28 * Otherwise: All of the matrix A
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29 *
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30 * M (input) INTEGER
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31 * The number of rows of the matrix A. M >= 0.
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32 *
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33 * N (input) INTEGER
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34 * The number of columns of the matrix A. N >= 0.
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35 *
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36 * A (input) COMPLEX array, dimension (LDA,N)
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37 * The m by n matrix A. If UPLO = 'U', only the upper trapezium
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38 * is accessed; if UPLO = 'L', only the lower trapezium is
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39 * accessed.
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40 *
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41 * LDA (input) INTEGER
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42 * The leading dimension of the array A. LDA >= max(1,M).
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43 *
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44 * B (output) COMPLEX array, dimension (LDB,N)
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45 * On exit, B = A in the locations specified by UPLO.
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46 *
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47 * LDB (input) INTEGER
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48 * The leading dimension of the array B. LDB >= max(1,M).
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49 *
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50 * =====================================================================
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51 *
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52 * .. Local Scalars ..
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53 INTEGER I, J
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54 * ..
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55 * .. External Functions ..
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56 LOGICAL LSAME
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57 EXTERNAL LSAME
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58 * ..
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59 * .. Intrinsic Functions ..
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60 INTRINSIC MIN
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61 * ..
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62 * .. Executable Statements ..
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63 *
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64 IF( LSAME( UPLO, 'U' ) ) THEN
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65 DO 20 J = 1, N
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66 DO 10 I = 1, MIN( J, M )
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67 B( I, J ) = A( I, J )
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68 10 CONTINUE
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69 20 CONTINUE
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70 *
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71 ELSE IF( LSAME( UPLO, 'L' ) ) THEN
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72 DO 40 J = 1, N
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73 DO 30 I = J, M
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74 B( I, J ) = A( I, J )
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75 30 CONTINUE
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76 40 CONTINUE
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77 *
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78 ELSE
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79 DO 60 J = 1, N
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80 DO 50 I = 1, M
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81 B( I, J ) = A( I, J )
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82 50 CONTINUE
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83 60 CONTINUE
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84 END IF
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85 *
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86 RETURN
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87 *
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88 * End of CLACPY
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89 *
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90 END