Update README.md

.gitignore

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 *.hsail
 *.brig
 isa.txt
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 *.isa
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 # debug file
 *.debug
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 # Gedit files
 *~
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 # Data file
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 data.tar.gz
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README.md

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-# Hetero-Mark
+#Hetero-Mark
 A Benchmark Suite for Heterogeneous System Computation
 
 ## Prerequisite
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 ### Generate your own input data
 * To generate custom data in `data` folder
 
+  * AES - Generates the input file and keys for AES. For keys, only 16-byte is
+    allowed. Usage:
+    ``` bash
+    ./datagen <num_bytes> > file.data
+    ```
+
+  * Gene-alignment - Generates the input file for Gene Alignment. The target
+    sequence length should be much shorter than the query sequence length.
+    ``` bash
+    python data_gen.py <target_sequence_len> <query_sequence_len>
+    ```
+
   * KMeans - It generates the input file for KMeans. Usage:
 
     ``` bash