Fake SRAM and Xyce RAW file option

compiler/characterizer/fake_sram.py

@@ -0,0 +1,61 @@
+import sram_config
+
+class fake_sram(sram_config.sram_config):
+    """ This is an SRAM that doesn't actually create itself, just computes
+    the sizes. """
+    def __init__(self, word_size, num_words, num_banks, name, num_spare_rows):
+        self.name = name
+        self.word_size = word_size
+        self.num_words = num_words
+        self.num_banks = num_banks
+        self.num_spare_rows = num_spare_rows
+        # TODO: Get width and height from gds bbox
+        self.width = 0
+        self.height = 0
+        #c = reload(__import__(OPTS.bitcell))
+        #self.mod_bitcell = getattr(c, OPTS.bitcell)
+        #self.bitcell = self.mod_bitcell()
+        # to get the row, col, etc.
+        self.compute_sizes()
+        self.setup_multiport_constants()
+
+    def setup_multiport_constants(self):
+        """
+        Taken from ../base/design.py
+        These are contants and lists that aid multiport design.
+        Ports are always in the order RW, W, R.
+        Port indices start from 0 and increment.
+        A first RW port will have clk0, csb0, web0, addr0, data0
+        A first W port (with no RW ports) will be: clk0, csb0, addr0, data0
+
+        """
+        total_ports = OPTS.num_rw_ports + OPTS.num_w_ports + OPTS.num_r_ports
+
+        # These are the read/write port indices.
+        self.readwrite_ports = []
+        # These are the read/write and write-only port indices
+        self.write_ports = []
+        # These are the write-only port indices.
+        self.writeonly_ports = []
+        # These are the read/write and read-only port indices
+        self.read_ports = []
+        # These are the read-only port indices.
+        self.readonly_ports = []
+        # These are all the ports
+        self.all_ports = list(range(total_ports))
+
+        # The order is always fixed as RW, W, R
+        port_number = 0
+        for port in range(OPTS.num_rw_ports):
+            self.readwrite_ports.append(port_number)
+            self.write_ports.append(port_number)
+            self.read_ports.append(port_number)
+            port_number += 1
+        for port in range(OPTS.num_w_ports):
+            self.write_ports.append(port_number)
+            self.writeonly_ports.append(port_number)
+            port_number += 1
+        for port in range(OPTS.num_r_ports):
+            self.read_ports.append(port_number)
+            self.readonly_ports.append(port_number)
+            port_number += 1