diff --git a/Makefile b/Makefile
index 0158e78..3a5a0d7 100644
--- a/Makefile
+++ b/Makefile
@@ -47,6 +47,10 @@ else ifeq ($(mask), upper_strided)
 	mask_int = 4
 else ifeq ($(mask), lower_strided)
 	mask_int = 5
+else ifeq ($(mask), sliding_window_attention)
+	mask_int = 6
+else ifeq ($(mask), strided_sliding_window_attention)
+	mask_int = 7
 else
 	mask_int = 0
 endif
diff --git a/PyITA/ITA.py b/PyITA/ITA.py
index 0b1dac3..d53e7cd 100644
--- a/PyITA/ITA.py
+++ b/PyITA/ITA.py
@@ -614,32 +614,59 @@ def apply_mask(self, index):
         elif (self.mask == 'upper_strided'):
             self.Mask = np.full((self.H, self.S, self.S), fill_value=True, dtype='bool')
             if (0 < index and index < self.S):
-                for h in range(self.Mask.shape[0]):
-                    for i in range(self.Mask.shape[1]):
-                        for j in range(i, self.Mask.shape[2], index):
-                            self.Mask[h][i][j] = False
+                if (index % 2 == 0):
+                    for h in range(self.Mask.shape[0]):
+                        for i in range(self.Mask.shape[1]):
+                            for j in range(i, self.Mask.shape[2], index):
+                                self.Mask[h][i][j] = False
+                else:
+                    raise ValueError(f"Index has to be a power of two for {self.mask} mask")
             else:
                 raise ValueError(f"Index is out of bounds for {self.mask} mask")
         elif (self.mask == 'lower_strided'):
             self.Mask = np.full((self.H, self.S, self.S), fill_value=True, dtype='bool')
             if (0 < index and index < self.S):
-                for h in range(self.Mask.shape[0]):
-                    for i in range(self.Mask.shape[1]):
-                        for j in range(i, self.Mask.shape[2], index):
-                            self.Mask[h][j][i] = False
+                if (index % 2 == 0):
+                    for h in range(self.Mask.shape[0]):
+                        for i in range(self.Mask.shape[1]):
+                            for j in range(i, self.Mask.shape[2], index):
+                                self.Mask[h][j][i] = False
+                else:
+                    raise ValueError(f"Index has to be a power of two for {self.mask} mask")
             else:
                 raise ValueError(f"Index is out of bounds for {self.mask} mask")
-        elif (self.mask == 'sliding_window_attention'):
+        elif (self.mask == 'sliding_window'):
             self.Mask = np.full((self.H, self.S, self.S), fill_value=True, dtype='bool')
             if (0 < index and index < self.S):
-                for h in range(self.Mask.shape[0]):
-                    for i in range(self.Mask.shape[1]):
-                        for j in range(i, (index + i)):
-                            self.Mask[h][i][j] = False
-                            self.Mask[h][j][i] = False
+                if (index % 2 == 0):
+                    for h in range(self.Mask.shape[0]):
+                        for i in range(self.Mask.shape[1]):
+                            for j in range(i, (index + i)):
+                                self.Mask[h][i][j] = False
+                                self.Mask[h][j][i] = False
+                else:
+                    raise ValueError(f"Index has to be a power of two for {self.mask} mask")                
+            else:
+                raise ValueError(f"Index is out of bounds for {self.mask} mask")
+        elif (self.mask == 'strided_sliding_window'):
+            self.Mask = np.full((self.H, self.S, self.S), fill_value=True, dtype='bool')
+            if (0 < index and index < self.S):
+                if (index % 2 == 0):
+                    for h in range(self.Mask.shape[0]):
+                        for i in range(self.Mask.shape[1]):
+                            for j in range(i, self.Mask.shape[2]):
+                                if (j > (index + i)):
+                                    if (j % index == 0):
+                                        self.Mask[h][i][j] = False
+                                        self.Mask[h][j][i] = False
+                                else:
+                                    self.Mask[h][i][j] = False
+                                    self.Mask[h][j][i] = False
+                else:
+                    raise ValueError(f"Index has to be a power of two for {self.mask} mask")                
             else:
                 raise ValueError(f"Index is out of bounds for {self.mask} mask")
-        elif(self.mask == 'none'):
+        elif (self.mask == 'none'):
             pass        
         else:
             raise ValueError("Mask not supported")
diff --git a/src/ita_masking.sv b/src/ita_masking.sv
index 7273309..f65cc5d 100644
--- a/src/ita_masking.sv
+++ b/src/ita_masking.sv
@@ -30,6 +30,9 @@ module ita_masking
   assign mask_o = mask_q;
 
   always_comb begin
+
+
+    
     case (ctrl_i.mask_type)
       None: begin
         mask_col_offset_d = '0;
@@ -41,9 +44,9 @@ module ita_masking
       UpperTriangular: begin
         mask_col_offset_d  = (step_i == QK || step_i == AV) ? mask_col_offset_q : ((ctrl_i.mask_start_index) & (N-1));
         mask_tile_x_pos_d  = (step_i == QK || step_i == AV) ? mask_tile_x_pos_q : ((ctrl_i.mask_start_index) / M);
-        mask_tile_y_pos_d = mask_tile_y_pos_q;
+        mask_tile_y_pos_d  = mask_tile_y_pos_q;
         mask_pos_d         = (step_i == QK || step_i == AV) ? mask_pos_q : ((((ctrl_i.mask_start_index)/N)*M) & ((M*M/N)-1));
-        mask_d = '0;
+        mask_d             = '0;
 
         if (step_i == QK) begin
           if (mask_tile_x_pos_q == tile_x_i && mask_tile_y_pos_q == tile_y_i && last_inner_tile_i == 1'b1) begin
@@ -92,11 +95,11 @@ module ita_masking
         end
       end
       LowerTriangular: begin
-        mask_col_offset_d = '0;
-        mask_tile_x_pos_d = '0;
+        mask_col_offset_d  = '0;
+        mask_tile_x_pos_d  = mask_tile_x_pos_q;
         mask_tile_y_pos_d  = (step_i == QK || step_i == AV) ? mask_tile_y_pos_q : ((ctrl_i.mask_start_index) / M);
         mask_pos_d         = (step_i == QK || step_i == AV) ? mask_pos_q : (ctrl_i.mask_start_index & (M-1));
-        mask_d = '0;
+        mask_d             = '0;
 
         if (step_i == QK) begin
           if (mask_tile_x_pos_q == tile_x_i && mask_tile_y_pos_q == tile_y_i && last_inner_tile_i == 1'b1) begin
@@ -166,6 +169,54 @@ module ita_masking
           end
         end
       end
+      UpperStrided: begin
+        mask_col_offset_d = '0;
+        mask_tile_x_pos_d = '0;
+        mask_tile_y_pos_d = '0;
+        mask_pos_d        = '0;
+        mask_d            = '0;
+
+        if (step_i == QK) begin
+          if (last_inner_tile_i == 1'b1) begin
+            for (int i = 0; i < N; i++) begin
+              //Marcel Kant: Does only work if ctrl_i.mask_start_index is a power of two
+              if ((((((count_i / M) * N) + i + (tile_x_i * M)) - ((count_i & (M-1)) + (tile_y_i * M))) & (ctrl_i.mask_start_index-1)) == 0 &&
+                      ((((count_i / M) * N) + i + (tile_x_i * M)) >= ((count_i & (M-1)) + (tile_y_i * M)))) begin
+                mask_d[i] = 1'b0;
+              end else begin
+                mask_d[i] = 1'b1;
+              end
+            end
+          end
+        end
+      end
+      LowerStrided: begin
+        mask_col_offset_d = '0;
+        mask_tile_x_pos_d = '0;
+        mask_tile_y_pos_d = '0;
+        mask_pos_d        = '0;
+        mask_d            = '0;
+
+        if (step_i == QK) begin
+          if (last_inner_tile_i == 1'b1) begin
+            for (int i = 0; i < N; i++) begin
+              //Marcel Kant: Does only work if ctrl_i.mask_start_index is a power of two
+              if ((((((count_i / M) * N) + i + (tile_x_i * M)) - ((count_i & (M-1)) + (tile_y_i * M))) & (ctrl_i.mask_start_index-1)) == 0 &&
+                      ((((count_i / M) * N) + i + (tile_x_i * M)) <= ((count_i & (M-1)) + (tile_y_i * M)))) begin
+                mask_d[i] = 1'b0;
+              end else begin
+                mask_d[i] = 1'b1;
+              end
+            end
+          end
+        end
+      end
+      SlidingWindow: begin
+        
+      end
+      StridedSlidingWindow: begin
+        
+      end
     endcase
   end
 
diff --git a/src/ita_package.sv b/src/ita_package.sv
index 184e0f9..fee10a8 100644
--- a/src/ita_package.sv
+++ b/src/ita_package.sv
@@ -41,7 +41,14 @@ package ita_package;
   typedef logic signed [GELU_OUT_WIDTH-1:0] gelu_out_t;
 
   // Masking
-  typedef enum {None=0, UpperTriangular=1, LowerTriangular=2, Strided=3, UpperStrided=4, LowerStrided=5} mask_e;
+  typedef enum {None=0, 
+                UpperTriangular=1, 
+                LowerTriangular=2, 
+                Strided=3, 
+                UpperStrided=4, 
+                LowerStrided=5,
+                SlidingWindow=6,
+                StridedSlidingWindow=7} mask_e;
   typedef logic [WO-WI*2-2:0] mask_index_t;
 
   // IO
diff --git a/src/ita_softmax.sv b/src/ita_softmax.sv
index 70bdfe8..3e38f47 100644
--- a/src/ita_softmax.sv
+++ b/src/ita_softmax.sv
@@ -325,6 +325,28 @@ module ita_softmax
                   disable_col[i] = 1'b1;
                 end
               end
+              UpperStrided: begin
+                if ((((i + (mask_tile_x_q * M)) - ((count_soft_mask_q & (M-1)) + (mask_tile_y_q * M))) & (ctrl_i.mask_start_index-1)) == 0 &&
+                      ((i + (mask_tile_x_q * M)) >= ((count_soft_mask_q & (M-1)) + (mask_tile_y_q * M)))) begin
+                  disable_col[i] = 1'b0;
+                end else begin
+                  disable_col[i] = 1'b1;
+                end
+              end
+              LowerStrided: begin
+                if ((((i + (mask_tile_x_q * M)) - ((count_soft_mask_q & (M-1)) + (mask_tile_y_q * M))) & (ctrl_i.mask_start_index-1)) == 0 &&
+                      ((i + (mask_tile_x_q * M)) <= ((count_soft_mask_q & (M-1)) + (mask_tile_y_q * M)))) begin
+                  disable_col[i] = 1'b0;
+                end else begin
+                  disable_col[i] = 1'b1;
+                end
+              end
+              SlidingWindow: begin
+                
+              end
+              StridedSlidingWindow: begin
+                
+              end
             endcase          
           end
           
diff --git a/testGenerator.py b/testGenerator.py
index 97465d9..9079056 100644
--- a/testGenerator.py
+++ b/testGenerator.py
@@ -108,7 +108,14 @@ class ArgumentDefaultMetavarTypeFormatter(argparse.ArgumentDefaultsHelpFormatter
                                  default = 'none',
                                  type = str,
                                  help = 'Attention-Mask',
-                                 choices = ['none', 'upper_triangular', 'lower_triangular', 'strided', 'upper_strided', 'lower_strided'])
+                                 choices = ['none',
+                                            'upper_triangular', 
+                                            'lower_triangular', 
+                                            'strided', 
+                                            'upper_strided', 
+                                            'lower_strided',
+                                            'sliding_window',
+                                            'strided_sliding_window'])
         self.group1.add_argument('-I', default = 1, type = int, help = 'Masking starting index')
         self.group1.add_argument('--no-partial-softmax',
                                  action = 'store_true',