Added Sobel without pad

src/main/scala/apps/tester.scala

@@ -3,7 +3,7 @@ package apps
 import elevate.core._
 import rise.GAP8.DSL.gap8Run
 import rise.GAP8.primitives.{copyToL1, copyToL2, gap8hwConv3x3}
-import rise.core.DSL.HighLevelConstructs.zipND
+import rise.core.DSL.HighLevelConstructs.{slide2D, zipND}
 import rise.core.DSL.Type._
 import rise.core.DSL._
 import rise.core._
@@ -44,9 +44,35 @@ object tester {
         |   return res;
         | }
         |""".stripMargin,
-      i16 ->: i16
+      u32 ->: u32
     )
 
+    val h: Nat = 240
+    val w: Nat = 320
+
+
+    //(h`.`w`.`u8) ->: (3`.`3`.`int) ->: (3`.`3`.`int) ->: (h`.`w`.`u8
+    val sobelWithoutPad: ToBeTyped[Rise] =
+      fun(
+        ArrayType(h, ArrayType(w, u8)) ->:
+          ArrayType(3, ArrayType(3, u8)) ->:
+          ArrayType(3, ArrayType(3, u8)) ->:
+          ArrayType(h - 2, ArrayType(w - 2, u8))
+      )((pic, hf, vf) =>
+        gap8Run(8)(
+        pic |>
+          slide2D(sz = 3, st = 1) |>
+          mapSeq(mapSeq(fun(submat =>
+            zip(submat |> join)(hf |> join) |> map(fun(x => (cast(fst(x)) :: u32) * cast(snd(x)) :: u32)) |> reduceSeq(add)(cast(l(0)) :: u32) |> letf(h =>
+              zip(submat |> join)(vf |> join) |> map(fun(x => (cast(fst(x)) :: u32) * cast(snd(x)) :: u32)) |> reduceSeq(add)(cast(l(0)) :: u32) |> letf(v =>
+                cast(gapSqrt(h * h + v * v)) :: u8
+              )
+            )
+          ))))
+      )
+
+    println(translateToString(util.gen.gap8.hosted("SobelWOutPad").fromExpr(sobelWithoutPad)))
+
     //2D Zip
     //Merge mapPar
     //1D slide