?? slacpy.c
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/** ======================================================================* NIST Guide to Available Math Software.* Fullsource for module SSYEVX.C from package CLAPACK.* Retrieved from NETLIB on Fri Mar 10 14:23:44 2000.* ======================================================================*/#include <f2c.h>/* Subroutine */ int slacpy_(char *uplo, integer *m, integer *n, real *a, integer *lda, real *b, integer *ldb){/* -- LAPACK auxiliary routine (version 2.0) -- Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd., Courant Institute, Argonne National Lab, and Rice University February 29, 1992 Purpose ======= SLACPY copies all or part of a two-dimensional matrix A to another matrix B. Arguments ========= UPLO (input) CHARACTER*1 Specifies the part of the matrix A to be copied to B. = 'U': Upper triangular part = 'L': Lower triangular part Otherwise: All of the matrix A M (input) INTEGER The number of rows of the matrix A. M >= 0. N (input) INTEGER The number of columns of the matrix A. N >= 0. A (input) REAL array, dimension (LDA,N) The m by n matrix A. If UPLO = 'U', only the upper triangle or trapezoid is accessed; if UPLO = 'L', only the lower triangle or trapezoid is accessed. LDA (input) INTEGER The leading dimension of the array A. LDA >= max(1,M). B (output) REAL array, dimension (LDB,N) On exit, B = A in the locations specified by UPLO. LDB (input) INTEGER The leading dimension of the array B. LDB >= max(1,M). ===================================================================== Parameter adjustments Function Body */ /* System generated locals */ integer a_dim1, a_offset, b_dim1, b_offset, i__1, i__2; /* Local variables */ static integer i, j; extern logical lsame_(char *, char *);#define A(I,J) a[(I)-1 + ((J)-1)* ( *lda)]#define B(I,J) b[(I)-1 + ((J)-1)* ( *ldb)] if (lsame_(uplo, "U")) { i__1 = *n; for (j = 1; j <= *n; ++j) { i__2 = min(j,*m); for (i = 1; i <= min(j,*m); ++i) { B(i,j) = A(i,j);/* L10: */ }/* L20: */ } } else if (lsame_(uplo, "L")) { i__1 = *n; for (j = 1; j <= *n; ++j) { i__2 = *m; for (i = j; i <= *m; ++i) { B(i,j) = A(i,j);/* L30: */ }/* L40: */ } } else { i__1 = *n; for (j = 1; j <= *n; ++j) { i__2 = *m; for (i = 1; i <= *m; ++i) { B(i,j) = A(i,j);/* L50: */ }/* L60: */ } } return 0;/* End of SLACPY */} /* slacpy_ */
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