From 69f2911e04ffb1b19eef1fafb8c040af271f656e Mon Sep 17 00:00:00 2001
From: Tor Aamodt <aamodt@ece.ubc.ca>
Date: Thu, 15 Jul 2010 18:09:46 -0800
Subject: creating branch for adding support for CUDA 3.x and Fermi

[git-p4: depot-paths = "//depot/gpgpu_sim_research/fermi/distribution/": change = 6829]
---
 .../3rdParty/ParMetis-3.1/ParMETISLib/csrmatch.c   | 88 ++++++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 benchmarks/CUDA/DG/3rdParty/ParMetis-3.1/ParMETISLib/csrmatch.c

(limited to 'benchmarks/CUDA/DG/3rdParty/ParMetis-3.1/ParMETISLib/csrmatch.c')

diff --git a/benchmarks/CUDA/DG/3rdParty/ParMetis-3.1/ParMETISLib/csrmatch.c b/benchmarks/CUDA/DG/3rdParty/ParMetis-3.1/ParMETISLib/csrmatch.c
new file mode 100644
index 0000000..ace7998
--- /dev/null
+++ b/benchmarks/CUDA/DG/3rdParty/ParMetis-3.1/ParMETISLib/csrmatch.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright 1997, Regents of the University of Minnesota
+ *
+ * csrmatch.c
+ *
+ * This file contains the code that computes matchings
+ *
+ * Started 7/23/97
+ * George
+ *
+ * $Id: csrmatch.c,v 1.2 2003/07/21 17:18:48 karypis Exp $
+ *
+ */
+
+#include <parmetislib.h>
+
+
+
+
+/*************************************************************************
+* This function finds a matching using the HEM heuristic
+**************************************************************************/
+void CSR_Match_SHEM(MatrixType *matrix, idxtype *match, idxtype *mlist,
+     idxtype *skip, int ncon)
+{
+  int h, i, ii, j;
+  int nrows, edge, maxidx, count;
+  float maxwgt;
+  idxtype *rowptr, *colind;
+  float *transfer;
+  KVType *links;
+
+  nrows = matrix->nrows;
+  rowptr = matrix->rowptr;
+  colind = matrix->colind;
+  transfer = matrix->transfer;
+
+  idxset(nrows, UNMATCHED, match);
+
+  links = (KVType *)GKmalloc(sizeof(KVType)*nrows, "links");
+  for (i=0; i<nrows; i++) { 
+    links[i].key = i; 
+    links[i].val = 0.0;
+  }
+
+  for (i=0; i<nrows; i++)
+    for (j=rowptr[i]; j<rowptr[i+1]; j++) 
+      for (h=0; h<ncon; h++)
+        if (links[i].val < fabs(transfer[j*ncon+h]))
+          links[i].val = fabs(transfer[j*ncon+h]);
+
+  qsort(links, nrows, sizeof(KVType), myvalkeycompare);
+
+  count = 0;
+  for (ii=0; ii<nrows; ii++) {
+    i = links[ii].key;
+
+    if (match[i] == UNMATCHED) {
+      maxidx = i;
+      maxwgt = 0.0;
+
+      /* Find a heavy-edge matching */
+      for (j=rowptr[i]; j<rowptr[i+1]; j++) {
+        edge = colind[j];
+        if (match[edge] == UNMATCHED && edge != i && skip[j] == 0) {
+          for (h=0; h<ncon; h++)
+            if (maxwgt < fabs(transfer[j*ncon+h]))
+              break;
+
+          if (h != ncon) {
+            maxwgt = fabs(transfer[j*ncon+h]);
+            maxidx = edge;
+          }
+        }
+      }
+
+      if (maxidx != i) {
+        match[i] = maxidx;
+        match[maxidx] = i;
+        mlist[count++] = amax(i, maxidx);
+        mlist[count++] = amin(i, maxidx);
+      }
+    }
+  }
+
+  GKfree((void **)&links, LTERM);
+}
+
-- 
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