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112 lines
2.8 KiB
112 lines
2.8 KiB
#include "clapack.h" |
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/* Subroutine */ int slacpy_(char *uplo, integer *m, integer *n, real *a, |
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integer *lda, real *b, integer *ldb) |
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{ |
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/* System generated locals */ |
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integer a_dim1, a_offset, b_dim1, b_offset, i__1, i__2; |
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/* Local variables */ |
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integer i__, j; |
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extern logical lsame_(char *, char *); |
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/* -- LAPACK auxiliary routine (version 3.1) -- */ |
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/* Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */ |
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/* November 2006 */ |
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/* .. Scalar Arguments .. */ |
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/* .. */ |
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/* .. Array Arguments .. */ |
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/* .. */ |
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/* Purpose */ |
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/* ======= */ |
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/* SLACPY copies all or part of a two-dimensional matrix A to another */ |
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/* matrix B. */ |
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/* Arguments */ |
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/* ========= */ |
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/* UPLO (input) CHARACTER*1 */ |
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/* Specifies the part of the matrix A to be copied to B. */ |
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/* = 'U': Upper triangular part */ |
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/* = 'L': Lower triangular part */ |
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/* Otherwise: All of the matrix A */ |
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/* M (input) INTEGER */ |
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/* The number of rows of the matrix A. M >= 0. */ |
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/* N (input) INTEGER */ |
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/* The number of columns of the matrix A. N >= 0. */ |
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/* A (input) REAL array, dimension (LDA,N) */ |
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/* The m by n matrix A. If UPLO = 'U', only the upper triangle */ |
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/* or trapezoid is accessed; if UPLO = 'L', only the lower */ |
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/* triangle or trapezoid is accessed. */ |
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/* LDA (input) INTEGER */ |
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/* The leading dimension of the array A. LDA >= max(1,M). */ |
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/* B (output) REAL array, dimension (LDB,N) */ |
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/* On exit, B = A in the locations specified by UPLO. */ |
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/* LDB (input) INTEGER */ |
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/* The leading dimension of the array B. LDB >= max(1,M). */ |
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/* ===================================================================== */ |
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/* .. Local Scalars .. */ |
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/* .. */ |
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/* .. External Functions .. */ |
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/* .. */ |
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/* .. Intrinsic Functions .. */ |
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/* .. */ |
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/* .. Executable Statements .. */ |
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/* Parameter adjustments */ |
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a_dim1 = *lda; |
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a_offset = 1 + a_dim1; |
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a -= a_offset; |
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b_dim1 = *ldb; |
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b_offset = 1 + b_dim1; |
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b -= b_offset; |
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/* Function Body */ |
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if (lsame_(uplo, "U")) { |
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i__1 = *n; |
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for (j = 1; j <= i__1; ++j) { |
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i__2 = min(j,*m); |
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for (i__ = 1; i__ <= i__2; ++i__) { |
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b[i__ + j * b_dim1] = a[i__ + j * a_dim1]; |
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/* L10: */ |
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} |
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/* L20: */ |
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} |
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} else if (lsame_(uplo, "L")) { |
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i__1 = *n; |
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for (j = 1; j <= i__1; ++j) { |
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i__2 = *m; |
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for (i__ = j; i__ <= i__2; ++i__) { |
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b[i__ + j * b_dim1] = a[i__ + j * a_dim1]; |
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/* L30: */ |
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} |
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/* L40: */ |
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} |
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} else { |
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i__1 = *n; |
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for (j = 1; j <= i__1; ++j) { |
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i__2 = *m; |
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for (i__ = 1; i__ <= i__2; ++i__) { |
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b[i__ + j * b_dim1] = a[i__ + j * a_dim1]; |
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/* L50: */ |
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} |
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/* L60: */ |
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} |
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} |
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return 0; |
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/* End of SLACPY */ |
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} /* slacpy_ */
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