[OnnxToTorch][GridSample] Add support for border padding mode

Author: Ax9D

lib/Conversion/TorchOnnxToTorch/DefaultDomainGtoP.cpp

@@ -140,12 +140,19 @@ void mlir::torch::onnx_c::populateDefaultDomainGtoP(
         }
 
         std::string padding;
+        int64_t paddingModeInt;
         if (binder.customOpNameStringAttr(padding, "padding_mode", "zeros"))
           return rewriter.notifyMatchFailure(binder.op,
                                              "padding_mode bind failure");
-        if (padding != "zeros")
+        if (padding == "zeros") {
+          paddingModeInt = 0;
+        } else if (padding == "border") {
+          paddingModeInt = 1;
+        } else {
           return rewriter.notifyMatchFailure(
-              binder.op, "currently only padding_mode : zeros supported");
+              binder.op,
+              "currently only padding_mode : zeros and border supported");
+        }
         int64_t align;
         if (binder.s64IntegerAttr(align, "align_corners", 0))
           return rewriter.notifyMatchFailure(binder.op,
@@ -157,7 +164,8 @@ void mlir::torch::onnx_c::populateDefaultDomainGtoP(
 
         Value paddingMode = rewriter.create<Torch::ConstantIntOp>(
             binder.getLoc(), rewriter.getType<Torch::IntType>(),
-            rewriter.getIntegerAttr(rewriter.getIntegerType(64), 0));
+            rewriter.getIntegerAttr(rewriter.getIntegerType(64),
+                                    paddingModeInt));
 
         bool alignMode = align;
         Value alignCorners = rewriter.create<Torch::ConstantBoolOp>(