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* \brief Performs numerical pivoting
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* -- SuperLU routine (version 3.0) --
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* Univ. of California Berkeley, Xerox Palo Alto Research Center,
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* and Lawrence Berkeley National Lab.
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* Copyright (c) 1994 by Xerox Corporation. All rights reserved.
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY
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* EXPRESSED OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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* Permission is hereby granted to use or copy this program for any
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* purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is
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* granted, provided the above notices are retained, and a notice that
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* the code was modified is included with the above copyright notice.
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Copyright (c) 1994 by Xerox Corporation. All rights reserved.
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THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY
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EXPRESSED OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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Permission is hereby granted to use or copy this program for any
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purpose, provided the above notices are retained on all copies.
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Permission to modify the code and to distribute modified code is
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granted, provided the above notices are retained, and a notice that
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the code was modified is included with the above copyright notice.
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#include <stdlib.h>
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#include "slu_sdefs.h"
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const int jcol, /* in */
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const float u, /* in - diagonal pivoting threshold */
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int *usepr, /* re-use the pivot sequence given by perm_r/iperm_r */
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int *perm_r, /* may be modified */
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int *iperm_r, /* in - inverse of perm_r */
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int *iperm_c, /* in - used to find diagonal of Pc*A*Pc' */
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int *pivrow, /* out */
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GlobalLU_t *Glu, /* modified - global LU data structures */
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SuperLUStat_t *stat /* output */
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* Performs the numerical pivoting on the current column of L,
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* Return value: 0 success;
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* i > 0 U(i,i) is exactly zero.
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const int jcol, /* in */
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const double u, /* in - diagonal pivoting threshold */
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int *usepr, /* re-use the pivot sequence given by perm_r/iperm_r */
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int *perm_r, /* may be modified */
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int *iperm_r, /* in - inverse of perm_r */
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int *iperm_c, /* in - used to find diagonal of Pc*A*Pc' */
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int *pivrow, /* out */
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GlobalLU_t *Glu, /* modified - global LU data structures */
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SuperLUStat_t *stat /* output */
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int fsupc; /* first column in the supernode */
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int nsupc; /* no of columns in the supernode */
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int nsupr; /* no of rows in the supernode */
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scipy/sparse/linalg/dsolve/SuperLU/SRC/spivotL.c
