Add sparse matrix compat module for 2.0

Signed-off-by: Shreyas Khandekar <60454060+ShreyasKhandekar@users.noreply.github.com>

src/compat/eq-20/ArkoudaSparseMatrixCompat.chpl

@@ -0,0 +1,86 @@
+module ArkoudaSparseMatrixCompat {
+  use SparseBlockDist;
+
+  proc SparseBlockDom.setLocalSubdomain(locIndices, loc: locale = here) {
+    if loc != here then
+      halt("setLocalSubdomain() doesn't currently support remote updates");
+    ref myBlock = this.myLocDom!.mySparseBlock;
+    if myBlock.type != locIndices.type then
+      compilerError("setLocalSubdomain() expects its argument to be of type ",
+                     myBlock.type:string);
+    else
+      myBlock = locIndices;
+  }
+
+  proc SparseBlockArr.getLocalSubarray(localeRow, localeCol) const ref {
+    return this.locArr[localeRow, localeCol]!.myElems;
+  }
+
+  proc SparseBlockArr.getLocalSubarray(localeIdx) const ref {
+    return this.locArr[localeIdx]!.myElems;
+  }
+
+  proc SparseBlockArr.setLocalSubarray(locNonzeroes, loc: locale = here) {
+    if loc != here then
+      halt("setLocalSubarray() doesn't currently support remote updates");
+    ref myBlock = this.myLocArr!.myElems;
+    if myBlock.type != locNonzeroes.type then
+      compilerError("setLocalSubarray() expects its argument to be of type ",
+                    myBlock.type:string);
+    else
+      myBlock.data = locNonzeroes.data;
+  }
+
+  proc SparseBlockDom.dsiTargetLocales() const ref {
+    return dist.targetLocales;
+  }
+
+  proc SparseBlockArr.dsiTargetLocales() const ref {
+    return dom.dsiTargetLocales();
+  }
+
+  use LayoutCS;
+
+  proc CSDom.rows() {
+    return this.rowRange;
+  }
+
+  proc CSDom.cols() {
+    return this.colRange;
+  }
+
+  @chpldoc.nodoc
+  iter CSDom.uidsInRowCol(rc) {
+    for uid in startIdx[rc]..<startIdx[rc+1] do
+      yield uid;
+  }
+
+  proc CSArr.rows() {
+    return this.dom.rows();
+  }
+
+  proc CSArr.cols() {
+    return this.dom.cols();
+  }
+
+  @chpldoc.nodoc
+  iter CSArr.indsAndVals(rc) {
+    ref dom = this.dom;
+    for uid in dom.uidsInRowCol(rc) do
+      yield (dom.idx[uid], this.data[uid]);
+  }
+
+  iter CSArr.colsAndVals(r) {
+    if this.dom.compressRows == false then
+      compilerError("Can't (efficiently) iterate over rows using a CSC layout");
+    for colVal in indsAndVals(r) do
+      yield colVal;
+  }
+
+  iter CSArr.rowsAndVals(c) {
+    if this.dom.compressRows == true then
+      compilerError("Can't (efficiently) iterate over columns using a CSR layout");
+    for rowVal in indsAndVals(c) do
+      yield rowVal;
+  }
+}