Added corner information for analytical power estimation.

compiler/base/contact.py

@@ -162,7 +162,7 @@ class contact(hierarchy_design.hierarchy_design):
                       width=well_width,
                       height=well_height)
         
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """ Get total power of a module  """
         return self.return_power()
 

compiler/base/design.py

@@ -88,11 +88,11 @@ class design(hierarchy_design):
             self.readonly_ports.append(port_number)
             port_number += 1
 
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """ Get total power of a module  """
         total_module_power = self.return_power()
         for inst in self.insts:
-            total_module_power += inst.mod.analytical_power(proc, vdd, temp, load)
+            total_module_power += inst.mod.analytical_power(corner, load)
         return total_module_power
     
     def __str__(self):

compiler/base/hierarchy_spice.py

@@ -235,10 +235,10 @@ class spice():
         modeling it as a resistance driving a capacitance
         """
         swing_factor = abs(math.log(1-swing)) # time constant based on swing
-        proc,volt,temp = corner
+        proc,vdd,temp = corner
         #FIXME: type of delay is needed to know which process to use.
         proc_mult = max(self.get_process_delay_factor(proc)) 
-        volt_mult = self.get_voltage_delay_factor(volt)
+        volt_mult = self.get_voltage_delay_factor(vdd)
         temp_mult = self.get_temp_delay_factor(temp)
         delay = swing_factor * r * c #c is in ff and delay is in fs
         delay = delay * proc_mult * volt_mult * temp_mult
@@ -291,6 +291,22 @@ class spice():
     def generate_rc_net(self,lump_num, wire_length, wire_width):
         return wire_spice_model(lump_num, wire_length, wire_width)
         
+    def calc_dynamic_power(self, corner, c, freq, swing=1.0):
+        """ 
+        Calculate dynamic power using effective capacitance, frequency, and corner (PVT)
+        """
+        proc,vdd,temp = corner
+        net_vswing = vdd*swing
+        power_dyn = c*vdd*net_vswing*freq
+        
+        #Apply process and temperature factors. Roughly, process and Vdd affect the delay which affects the power.
+        #No other estimations are currently used. Increased delay->slower freq.->less power
+        proc_div = max(self.get_process_delay_factor(proc)) 
+        temp_div = self.get_temp_delay_factor(temp)
+        power_dyn = power_dyn/(proc_div*temp_div)
+        
+        return power_dyn  
+        
     def return_power(self, dynamic=0.0, leakage=0.0):
         return power_data(dynamic, leakage)
 

compiler/bitcells/bitcell.py

@@ -66,7 +66,7 @@ class bitcell(design.design):
         column_pins = ["br"]
         return column_pins
         
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Bitcell power in nW. Only characterizes leakage."""
         from tech import spice
         leakage = spice["bitcell_leakage"]

compiler/bitcells/bitcell_1rw_1r.py

@@ -89,7 +89,7 @@ class bitcell_1rw_1r(design.design):
         column_pins = ["br0"]
         return column_pins
     
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Bitcell power in nW. Only characterizes leakage."""
         from tech import spice
         leakage = spice["bitcell_leakage"]

compiler/bitcells/bitcell_1w_1r.py

@@ -89,7 +89,7 @@ class bitcell_1w_1r(design.design):
         column_pins = ["br0"]
         return column_pins
     
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Bitcell power in nW. Only characterizes leakage."""
         from tech import spice
         leakage = spice["bitcell_leakage"]

compiler/bitcells/pbitcell.py

@@ -874,7 +874,7 @@ class pbitcell(design.design):
         result = self.cal_delay_with_rc(corner, r = r, c =  c_para+load, slew = slew, swing = swing)
         return result
         
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Bitcell power in nW. Only characterizes leakage."""
         from tech import spice
         leakage = spice["bitcell_leakage"]

compiler/characterizer/delay.py

@@ -931,7 +931,7 @@ class delay(simulation):
         """Get the dynamic and leakage power from the SRAM"""
         #slews unused, only last load is used
         load = loads[-1]
-        power = self.sram.analytical_power(self.process, self.vdd_voltage, self.temperature, load) 
+        power = self.sram.analytical_power(self.corner, load) 
         #convert from nW to mW
         power.dynamic /= 1e6 
         power.leakage /= 1e6

compiler/modules/bitcell_array.py

@@ -147,19 +147,19 @@ class bitcell_array(design.design):
         return self.return_delay(cell_delay.delay+wl_to_cell_delay.delay,
                                  wl_to_cell_delay.slew)
                         
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Power of Bitcell array and bitline in nW."""
-        from tech import drc
+        from tech import drc, parameter
         
         # Dynamic Power from Bitline
         bl_wire = self.gen_bl_wire()
         cell_load = 2 * bl_wire.return_input_cap() 
-        bl_swing = 0.1 #This should probably be defined in the tech file or input
+        bl_swing = parameter["rbl_height_percentage"]
         freq = spice["default_event_rate"]
-        bitline_dynamic = bl_swing*cell_load*vdd*vdd*freq #not sure if calculation is correct
+        bitline_dynamic = self.calc_dynamic_power(corner, cell_load, freq, swing=bl_swing)
         
         #Calculate the bitcell power which currently only includes leakage 
-        cell_power = self.cell.analytical_power(proc, vdd, temp, load)
+        cell_power = self.cell.analytical_power(corner, load)
         
         #Leakage power grows with entire array and bitlines.
         total_power = self.return_power(cell_power.dynamic + bitline_dynamic * self.column_size,

compiler/modules/dff.py

@@ -21,11 +21,11 @@ class dff(design.design):
         self.height = dff.height
         self.pin_map = dff.pin_map
     
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Returns dynamic and leakage power. Results in nW"""
         c_eff = self.calculate_effective_capacitance(load)
-        f = spice["default_event_rate"]
-        power_dyn = c_eff*vdd*vdd*f
+        freq = spice["default_event_rate"]
+        power_dyn = self.calc_dynamic_power(corner, c_eff, freq)
         power_leak = spice["msflop_leakage"]
         
         total_power = self.return_power(power_dyn, power_leak)

compiler/modules/sense_amp.py

@@ -38,7 +38,7 @@ class sense_amp(design.design):
         result = self.cal_delay_with_rc(corner, r = r, c =  c_para+load, slew = slew)
         return self.return_delay(result.delay, result.slew)
 
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Returns dynamic and leakage power. Results in nW"""
         #Power in this module currently not defined. Returns 0 nW (leakage and dynamic).
         total_power = self.return_power()

compiler/modules/single_level_column_mux_array.py

@@ -218,11 +218,11 @@ class single_level_column_mux_array(design.design):
 
     def analytical_delay(self, corner, vdd, slew, load=0.0):
         from tech import spice, parameter
-        proc,volt,temp = corner
+        proc,vdd,temp = corner
         r = spice["min_tx_r"]/(self.mux.ptx_width/parameter["min_tx_size"])
         #Drains of mux transistors make up capacitance. 
         c_para = spice["min_tx_drain_c"]*(self.mux.ptx_width/parameter["min_tx_size"])*self.words_per_row#ff
-        volt_swing = spice["v_threshold_typical"]/volt
+        volt_swing = spice["v_threshold_typical"]/vdd
         
         result = self.cal_delay_with_rc(corner, r = r, c =  c_para+load, slew = slew, swing = volt_swing)
         return self.return_delay(result.delay, result.slew)            

compiler/modules/tri_gate.py

@@ -33,7 +33,7 @@ class tri_gate(design.design):
         c_para = spice["min_tx_drain_c"]
         return self.cal_delay_with_rc(corner, r = r, c =  c_para+load, slew = slew)
         
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Returns dynamic and leakage power. Results in nW"""
         #Power in this module currently not defined. Returns 0 nW (leakage and dynamic).
         total_power = self.return_power() 

compiler/pgates/pinv.py

@@ -266,11 +266,11 @@ class pinv(pgate.pgate):
         c_para = spice["min_tx_drain_c"]*(self.nmos_size/parameter["min_tx_size"])#ff
         return self.cal_delay_with_rc(corner, r = r, c =  c_para+load, slew = slew)
         
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Returns dynamic and leakage power. Results in nW"""
         c_eff = self.calculate_effective_capacitance(load)
         freq = spice["default_event_rate"]
-        power_dyn = c_eff*vdd*vdd*freq
+        power_dyn = self.calc_dynamic_power(corner, c_eff, freq)
         power_leak = spice["inv_leakage"]
         
         total_power = self.return_power(power_dyn, power_leak)

compiler/pgates/pnand2.py

@@ -232,11 +232,11 @@ class pnand2(pgate.pgate):
         c_para = spice["min_tx_drain_c"]*(self.nmos_size/parameter["min_tx_size"])#ff
         return self.cal_delay_with_rc(corner, r = r, c =  c_para+load, slew = slew)
         
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Returns dynamic and leakage power. Results in nW"""
         c_eff = self.calculate_effective_capacitance(load)
         freq = spice["default_event_rate"]
-        power_dyn = c_eff*vdd*vdd*freq
+        power_dyn = self.calc_dynamic_power(corner, c_eff, freq)
         power_leak = spice["nand2_leakage"]
         
         total_power = self.return_power(power_dyn, power_leak)

compiler/pgates/pnand3.py

@@ -245,11 +245,11 @@ class pnand3(pgate.pgate):
         c_para = spice["min_tx_drain_c"]*(self.nmos_size/parameter["min_tx_size"])#ff
         return self.cal_delay_with_rc(corner, r = r, c =  c_para+load, slew = slew)
         
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Returns dynamic and leakage power. Results in nW"""
         c_eff = self.calculate_effective_capacitance(load)
         freq = spice["default_event_rate"]
-        power_dyn = c_eff*vdd*vdd*freq
+        power_dyn = self.calc_dynamic_power(corner, c_eff, freq)
         power_leak = spice["nand3_leakage"]
         
         total_power = self.return_power(power_dyn, power_leak)

compiler/pgates/pnor2.py

@@ -217,11 +217,11 @@ class pnor2(pgate.pgate):
         c_para = spice["min_tx_drain_c"]*(self.nmos_size/parameter["min_tx_size"])#ff
         return self.cal_delay_with_rc(corner, r = r, c =  c_para+load, slew = slew)
         
-    def analytical_power(self, proc, vdd, temp, load):
+    def analytical_power(self, corner, load):
         """Returns dynamic and leakage power. Results in nW"""
         c_eff = self.calculate_effective_capacitance(load)
         freq = spice["default_event_rate"]
-        power_dyn = c_eff*vdd*vdd*freq
+        power_dyn = self.calc_dynamic_power(corner, c_eff, freq)
         power_leak = spice["nor2_leakage"]
         
         total_power = self.return_power(power_dyn, power_leak)