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<article id="content">
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<header>
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<h1 class="title">Module <code>ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder</code></h1>
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</header>
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<section id="section-intro">
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<details class="source">
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<summary>
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<span>Expand source code</span>
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</summary>
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<pre><code class="python">from ariths_gen.wire_components import (
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Wire,
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ConstantWireValue0,
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ConstantWireValue1,
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Bus
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)
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from ariths_gen.core.arithmetic_circuits import (
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ArithmeticCircuit,
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MultiplierCircuit
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)
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from ariths_gen.core.logic_gate_circuits import (
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MultipleInputLogicGate
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)
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from ariths_gen.one_bit_circuits.one_bit_components import (
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HalfAdder,
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PGLogicBlock,
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FullAdder,
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FullAdderPG
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)
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from ariths_gen.one_bit_circuits.logic_gates import (
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AndGate,
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NandGate,
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OrGate,
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NorGate,
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XorGate,
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XnorGate,
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NotGate
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)
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class UnsignedCarryLookaheadAdder(ArithmeticCircuit):
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"""Class representing unsigned carry-lookahead adder.
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Unsigned carry-lookahead adder represents faster adder circuit which is composed
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of more complex circuitry but provides much less propagation delay as opposed to rca.
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It is mainly composed of propagate/generate blocks and many AND/OR gates to calculate carries individually.
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Class enables to choose the size of composite inner cla blocks (default is 4). These cla blocks are then cascaded
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to form the final N bit adder.
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```
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B3 A3 B2 A2 B1 A1 B0 A0
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│ │ │ │ │ │ │ │
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┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐
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│ PG │ │ PG │ │ PG │ │ PG │
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│ block│ │ block│ │ block│ │ block│
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│ │ │ │ │ │ │ │
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└─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘
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│││G3P3S3 │││G2P2S2 │││G1P1S1 │││G0P0S0
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┌─▼▼▼────────▼▼▼────────▼▼▼────────▼▼▼──┐
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│ Carry Lookahead logic │
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│ │
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└┬────┬───────┬──────────┬──────────┬───┘
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│ │ │ │ │
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▼ ▼ ▼ ▼ ▼
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Cout S3 S1 S0 S0
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```
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Description of the __init__ method.
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Args:
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a (Bus): First input bus.
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b (Bus): Second input bus.
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cla_block_size (int, optional): Size of each composite cla adder block size. Defaults to 4.
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prefix (str, optional): Prefix name of unsigned cla. Defaults to "".
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name (str, optional): Name of unsigned cla. Defaults to "u_cla".
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"""
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def __init__(self, a: Bus, b: Bus, cla_block_size: int = 4, prefix: str = "", name: str = "u_cla", **kwargs):
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self.N = max(a.N, b.N)
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super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N+1, **kwargs)
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# Bus sign extension in case buses have different lengths
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self.a.bus_extend(N=self.N, prefix=a.prefix)
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self.b.bus_extend(N=self.N, prefix=b.prefix)
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# To signify current number of blocks and number of bits that remain to be added into function blocks
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N_blocks = 0
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N_wires = self.N
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cin = ConstantWireValue0()
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while N_wires != 0:
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# Lists containing all propagate/generate wires
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self.propagate = []
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self.generate = []
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# Cin0 used as a first generate wire for obtaining next carry bits
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self.generate.append(cin)
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block_size = cla_block_size if N_wires >= cla_block_size else N_wires
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# Gradual addition of propagate/generate logic blocks and AND/OR gates for Cout bits generation, XOR gates for Sum bits generation
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for i in range(block_size):
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pg_block = PGLogicBlock(self.a.get_wire((N_blocks*cla_block_size)+i), self.b.get_wire((N_blocks*cla_block_size)+i), prefix=self.prefix+"_pg_logic"+str(self.get_instance_num(cls=PGLogicBlock)))
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self.propagate.append(pg_block.get_propagate_wire())
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self.generate.append(pg_block.get_generate_wire())
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self.add_component(pg_block)
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if i == 0 and N_blocks == 0:
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obj_sum_xor = XorGate(pg_block.get_sum_wire(), cin, prefix=self.prefix+"_xor"+str(self.get_instance_num(cls=XorGate)), parent_component=self)
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self.add_component(obj_sum_xor)
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self.out.connect(i+(N_blocks*cla_block_size), obj_sum_xor.out)
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# Carry propagation calculation
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obj_and = AndGate(self.propagate[(N_blocks*cla_block_size)+i], self.generate[(N_blocks*cla_block_size)+i], prefix=self.prefix+"_and"+str(self.get_instance_num(cls=AndGate)), parent_component=self)
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self.add_component(obj_and)
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# Carry bit generation
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obj_cout_or = OrGate(pg_block.get_generate_wire(), self.get_previous_component().out, prefix=self.prefix+"_or"+str(self.get_instance_num(cls=OrGate, count_disabled_gates=False)), parent_component=self)
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self.add_component(obj_cout_or)
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else:
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obj_sum_xor = XorGate(pg_block.get_sum_wire(), self.get_previous_component(2).out, prefix=self.prefix+"_xor"+str(self.get_instance_num(cls=XorGate)), parent_component=self)
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self.add_component(obj_sum_xor)
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self.out.connect(i+(N_blocks*cla_block_size), obj_sum_xor.out)
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# List of AND gates outputs that are later combined in a multi-bit OR gate
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composite_or_gates_inputs = []
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for g_index in range(len(self.generate)-1):
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composite_wires = []
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# Getting a list of wires used for current bit position cout composite AND gate's generation
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# E.g. for Cout2 = G1 + G0·P1 C0·P0·P1 it gets a list containing [C0,P0,P1] then [G0,P1]
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composite_wires.append(self.generate[g_index])
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for p_index in range(len(self.propagate)-1, g_index-1, -1):
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composite_wires.append(self.propagate[p_index])
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# For each pg pair values algorithmically combine two input AND gates to replace multiple input gates (resolves fan-in issue)
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pg_wires = Bus(wires_list=composite_wires)
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multi_bit_and_gate = MultipleInputLogicGate(a=pg_wires, two_input_gate_cls=AndGate, prefix=self.prefix+"_and", parent_component=self)
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composite_or_gates_inputs.append(multi_bit_and_gate.out)
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# Final OR gates cascade using generated AND gates output wires
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composite_or_wires = Bus(wires_list=composite_or_gates_inputs)
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multi_bit_or_gate = MultipleInputLogicGate(a=composite_or_wires, two_input_gate_cls=OrGate, prefix=self.prefix+"_or", parent_component=self)
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# Carry bit generation
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obj_cout_or = OrGate(pg_block.get_generate_wire(), multi_bit_or_gate.out, prefix=self.prefix+"_or"+str(self.get_instance_num(cls=OrGate, count_disabled_gates=False)), parent_component=self)
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self.add_component(obj_cout_or)
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# Updating cin for the the next bypass block
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# Also updating cout value which is used as cin for the first adder of the next block
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cin = obj_cout_or.out
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N_wires -= block_size
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N_blocks += 1
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# Connection of final Cout
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self.out.connect(self.N, cin)
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class SignedCarryLookaheadAdder(UnsignedCarryLookaheadAdder, ArithmeticCircuit):
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"""Class representing signed carry-lookahead adder.
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Signed carry-lookahead adder represents faster adder circuit which is composed
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of more complex circuitry but provides much less propagation delay as opposed to rca.
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It is mainly composed of propagate/generate blocks and many AND/OR gates to calculate carries individually.
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Class enables to choose the size of composite inner cla blocks (default is 4). These cla blocks are then cascaded
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to form the final N bit adder.
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At last XOR gates are used to ensure proper sign extension.
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```
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B3 A3 B2 A2 B1 A1 B0 A0
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│ │ │ │ │ │ │ │
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┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐
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│ PG │ │ PG │ │ PG │ │ PG │
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│ block│ │ block│ │ block│ │ block│
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│ │ │ │ │ │ │ │
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└─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘
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│││G3P3S3 │││G2P2S2 │││G1P1S1 │││G0P0S0
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┌─▼▼▼────────▼▼▼────────▼▼▼────────▼▼▼──┐
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│ Carry Lookahead logic │
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│ with sign extension │
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└┬────┬───────┬──────────┬──────────┬───┘
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│ │ │ │ │
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▼ ▼ ▼ ▼ ▼
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Cout S3 S1 S0 S0
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```
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Description of the __init__ method.
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Args:
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a (Bus): First input bus.
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b (Bus): Second input bus.
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cla_block_size (int, optional): Size of each composite cla adder block size. Defaults to 4.
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prefix (str, optional): Prefix name of signed cla. Defaults to "".
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name (str, optional): Name of signed cla. Defaults to "s_cla".
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"""
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def __init__(self, a: Bus, b: Bus, cla_block_size: int = 4, prefix: str = "", name: str = "s_cla", **kwargs):
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super().__init__(a=a, b=b, cla_block_size=cla_block_size, prefix=prefix, name=name, signed=True, **kwargs)
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self.c_data_type = "int64_t"
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# Additional XOR gates to ensure correct sign extension in case of sign addition
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sign_xor_1 = XorGate(self.a.get_wire(self.N-1), self.b.get_wire(self.N-1), prefix=self.prefix+"_xor"+str(self.get_instance_num(cls=XorGate)), parent_component=self)
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self.add_component(sign_xor_1)
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sign_xor_2 = XorGate(sign_xor_1.out, self.get_previous_component(2).out, prefix=self.prefix+"_xor"+str(self.get_instance_num(cls=XorGate)), parent_component=self)
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self.add_component(sign_xor_2)
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self.out.connect(self.N, sign_xor_2.out)</code></pre>
|
||
</details>
|
||
</section>
|
||
<section>
|
||
</section>
|
||
<section>
|
||
</section>
|
||
<section>
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||
</section>
|
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<section>
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<h2 class="section-title" id="header-classes">Classes</h2>
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<dl>
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<dt id="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.SignedCarryLookaheadAdder"><code class="flex name class">
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<span>class <span class="ident">SignedCarryLookaheadAdder</span></span>
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<span>(</span><span>a: <a title="ariths_gen.wire_components.buses.Bus" href="../../wire_components/buses.html#ariths_gen.wire_components.buses.Bus">Bus</a>, b: <a title="ariths_gen.wire_components.buses.Bus" href="../../wire_components/buses.html#ariths_gen.wire_components.buses.Bus">Bus</a>, cla_block_size: int = 4, prefix: str = '', name: str = 's_cla', **kwargs)</span>
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</code></dt>
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<dd>
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<div class="desc"><p>Class representing signed carry-lookahead adder.</p>
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<p>Signed carry-lookahead adder represents faster adder circuit which is composed
|
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of more complex circuitry but provides much less propagation delay as opposed to rca.
|
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It is mainly composed of propagate/generate blocks and many AND/OR gates to calculate carries individually.</p>
|
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<p>Class enables to choose the size of composite inner cla blocks (default is 4). These cla blocks are then cascaded
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to form the final N bit adder.
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At last XOR gates are used to ensure proper sign extension.</p>
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<pre><code> B3 A3 B2 A2 B1 A1 B0 A0
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│ │ │ │ │ │ │ │
|
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┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐
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│ PG │ │ PG │ │ PG │ │ PG │
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│ block│ │ block│ │ block│ │ block│
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│ │ │ │ │ │ │ │
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└─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘
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│││G3P3S3 │││G2P2S2 │││G1P1S1 │││G0P0S0
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┌─▼▼▼────────▼▼▼────────▼▼▼────────▼▼▼──┐
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│ Carry Lookahead logic │
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│ with sign extension │
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└┬────┬───────┬──────────┬──────────┬───┘
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│ │ │ │ │
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▼ ▼ ▼ ▼ ▼
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Cout S3 S1 S0 S0
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</code></pre>
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<p>Description of the <strong>init</strong> method.</p>
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<h2 id="args">Args</h2>
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<dl>
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<dt><strong><code>a</code></strong> : <code>Bus</code></dt>
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<dd>First input bus.</dd>
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<dt><strong><code>b</code></strong> : <code>Bus</code></dt>
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<dd>Second input bus.</dd>
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<dt><strong><code>cla_block_size</code></strong> : <code>int</code>, optional</dt>
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<dd>Size of each composite cla adder block size. Defaults to 4.</dd>
|
||
<dt><strong><code>prefix</code></strong> : <code>str</code>, optional</dt>
|
||
<dd>Prefix name of signed cla. Defaults to "".</dd>
|
||
<dt><strong><code>name</code></strong> : <code>str</code>, optional</dt>
|
||
<dd>Name of signed cla. Defaults to "s_cla".</dd>
|
||
</dl></div>
|
||
<details class="source">
|
||
<summary>
|
||
<span>Expand source code</span>
|
||
</summary>
|
||
<pre><code class="python">class SignedCarryLookaheadAdder(UnsignedCarryLookaheadAdder, ArithmeticCircuit):
|
||
"""Class representing signed carry-lookahead adder.
|
||
|
||
Signed carry-lookahead adder represents faster adder circuit which is composed
|
||
of more complex circuitry but provides much less propagation delay as opposed to rca.
|
||
It is mainly composed of propagate/generate blocks and many AND/OR gates to calculate carries individually.
|
||
|
||
Class enables to choose the size of composite inner cla blocks (default is 4). These cla blocks are then cascaded
|
||
to form the final N bit adder.
|
||
At last XOR gates are used to ensure proper sign extension.
|
||
|
||
```
|
||
B3 A3 B2 A2 B1 A1 B0 A0
|
||
│ │ │ │ │ │ │ │
|
||
┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐
|
||
│ PG │ │ PG │ │ PG │ │ PG │
|
||
│ block│ │ block│ │ block│ │ block│
|
||
│ │ │ │ │ │ │ │
|
||
└─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘
|
||
│││G3P3S3 │││G2P2S2 │││G1P1S1 │││G0P0S0
|
||
┌─▼▼▼────────▼▼▼────────▼▼▼────────▼▼▼──┐
|
||
│ Carry Lookahead logic │
|
||
│ with sign extension │
|
||
└┬────┬───────┬──────────┬──────────┬───┘
|
||
│ │ │ │ │
|
||
▼ ▼ ▼ ▼ ▼
|
||
Cout S3 S1 S0 S0
|
||
```
|
||
|
||
Description of the __init__ method.
|
||
|
||
Args:
|
||
a (Bus): First input bus.
|
||
b (Bus): Second input bus.
|
||
cla_block_size (int, optional): Size of each composite cla adder block size. Defaults to 4.
|
||
prefix (str, optional): Prefix name of signed cla. Defaults to "".
|
||
name (str, optional): Name of signed cla. Defaults to "s_cla".
|
||
"""
|
||
def __init__(self, a: Bus, b: Bus, cla_block_size: int = 4, prefix: str = "", name: str = "s_cla", **kwargs):
|
||
super().__init__(a=a, b=b, cla_block_size=cla_block_size, prefix=prefix, name=name, signed=True, **kwargs)
|
||
self.c_data_type = "int64_t"
|
||
|
||
# Additional XOR gates to ensure correct sign extension in case of sign addition
|
||
sign_xor_1 = XorGate(self.a.get_wire(self.N-1), self.b.get_wire(self.N-1), prefix=self.prefix+"_xor"+str(self.get_instance_num(cls=XorGate)), parent_component=self)
|
||
self.add_component(sign_xor_1)
|
||
sign_xor_2 = XorGate(sign_xor_1.out, self.get_previous_component(2).out, prefix=self.prefix+"_xor"+str(self.get_instance_num(cls=XorGate)), parent_component=self)
|
||
self.add_component(sign_xor_2)
|
||
self.out.connect(self.N, sign_xor_2.out)</code></pre>
|
||
</details>
|
||
<h3>Ancestors</h3>
|
||
<ul class="hlist">
|
||
<li><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder" href="#ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder">UnsignedCarryLookaheadAdder</a></li>
|
||
<li><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit" href="../../core/arithmetic_circuits/arithmetic_circuit.html#ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit">ArithmeticCircuit</a></li>
|
||
<li><a title="ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit">GeneralCircuit</a></li>
|
||
</ul>
|
||
<h3>Inherited members</h3>
|
||
<ul class="hlist">
|
||
<li><code><b><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder" href="#ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder">UnsignedCarryLookaheadAdder</a></b></code>:
|
||
<ul class="hlist">
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.add_component" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.add_component">add_component</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_blif_code_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_blif_code_flat">get_blif_code_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_blif_code_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_blif_code_hier">get_blif_code_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_c_code_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_c_code_flat">get_c_code_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_c_code_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_c_code_hier">get_c_code_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_carry_wire" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_carry_wire">get_carry_wire</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_cgp_code_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_cgp_code_flat">get_cgp_code_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_cgp_wires" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_cgp_wires">get_cgp_wires</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_circuit_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_circuit_blif">get_circuit_blif</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_circuit_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_circuit_c">get_circuit_c</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_circuit_gates" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_circuit_gates">get_circuit_gates</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_circuit_v" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_circuit_v">get_circuit_v</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_circuit_wire_index" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_circuit_wire_index">get_circuit_wire_index</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_component_types" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_component_types">get_component_types</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_declaration_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declaration_blif">get_declaration_blif</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_declaration_c_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declaration_c_flat">get_declaration_c_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_declaration_c_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declaration_c_hier">get_declaration_c_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_declaration_v_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declaration_v_flat">get_declaration_v_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_declaration_v_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declaration_v_hier">get_declaration_v_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_declarations_c_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declarations_c_hier">get_declarations_c_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_declarations_v_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declarations_v_hier">get_declarations_v_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_blif_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_blif_flat">get_function_blif_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_block_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_block_blif">get_function_block_blif</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_block_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_block_c">get_function_block_c</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_block_v" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_block_v">get_function_block_v</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_blocks_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_blocks_blif">get_function_blocks_blif</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_blocks_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_blocks_c">get_function_blocks_c</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_blocks_v" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_blocks_v">get_function_blocks_v</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_out_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_blif">get_function_out_blif</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_out_c_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_c_flat">get_function_out_c_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_out_c_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_c_hier">get_function_out_c_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_out_python_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_python_flat">get_function_out_python_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_out_v_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_v_flat">get_function_out_v_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_function_out_v_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_v_hier">get_function_out_v_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_includes_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_includes_c">get_includes_c</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_init_c_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_init_c_flat">get_init_c_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_init_c_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_init_c_hier">get_init_c_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_init_python_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_init_python_flat">get_init_python_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_init_v_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_init_v_flat">get_init_v_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_init_v_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_init_v_hier">get_init_v_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_instance_num" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_instance_num">get_instance_num</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_invocation_blif_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_invocation_blif_hier">get_invocation_blif_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_invocations_blif_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_invocations_blif_hier">get_invocations_blif_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_multi_bit_components" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_multi_bit_components">get_multi_bit_components</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_one_bit_components" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_one_bit_components">get_one_bit_components</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_out_invocation_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_out_invocation_c">get_out_invocation_c</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_out_invocation_v" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_out_invocation_v">get_out_invocation_v</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_outputs_cgp" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_outputs_cgp">get_outputs_cgp</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_parameters_cgp" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_parameters_cgp">get_parameters_cgp</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_previous_component" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_previous_component">get_previous_component</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_prototype_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_prototype_blif">get_prototype_blif</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_prototype_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_prototype_c">get_prototype_c</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_prototype_python" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_prototype_python">get_prototype_python</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_prototype_v" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_prototype_v">get_prototype_v</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_python_code_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_python_code_flat">get_python_code_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_sum_wire" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_sum_wire">get_sum_wire</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_triplets_cgp" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_triplets_cgp">get_triplets_cgp</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_unique_types" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_unique_types">get_unique_types</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_v_code_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_v_code_flat">get_v_code_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.get_v_code_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_v_code_hier">get_v_code_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder.save_wire_id" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.save_wire_id">save_wire_id</a></code></li>
|
||
</ul>
|
||
</li>
|
||
</ul>
|
||
</dd>
|
||
<dt id="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.UnsignedCarryLookaheadAdder"><code class="flex name class">
|
||
<span>class <span class="ident">UnsignedCarryLookaheadAdder</span></span>
|
||
<span>(</span><span>a: <a title="ariths_gen.wire_components.buses.Bus" href="../../wire_components/buses.html#ariths_gen.wire_components.buses.Bus">Bus</a>, b: <a title="ariths_gen.wire_components.buses.Bus" href="../../wire_components/buses.html#ariths_gen.wire_components.buses.Bus">Bus</a>, cla_block_size: int = 4, prefix: str = '', name: str = 'u_cla', **kwargs)</span>
|
||
</code></dt>
|
||
<dd>
|
||
<div class="desc"><p>Class representing unsigned carry-lookahead adder.</p>
|
||
<p>Unsigned carry-lookahead adder represents faster adder circuit which is composed
|
||
of more complex circuitry but provides much less propagation delay as opposed to rca.
|
||
It is mainly composed of propagate/generate blocks and many AND/OR gates to calculate carries individually.</p>
|
||
<p>Class enables to choose the size of composite inner cla blocks (default is 4). These cla blocks are then cascaded
|
||
to form the final N bit adder.</p>
|
||
<pre><code> B3 A3 B2 A2 B1 A1 B0 A0
|
||
│ │ │ │ │ │ │ │
|
||
┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐
|
||
│ PG │ │ PG │ │ PG │ │ PG │
|
||
│ block│ │ block│ │ block│ │ block│
|
||
│ │ │ │ │ │ │ │
|
||
└─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘
|
||
│││G3P3S3 │││G2P2S2 │││G1P1S1 │││G0P0S0
|
||
┌─▼▼▼────────▼▼▼────────▼▼▼────────▼▼▼──┐
|
||
│ Carry Lookahead logic │
|
||
│ │
|
||
└┬────┬───────┬──────────┬──────────┬───┘
|
||
│ │ │ │ │
|
||
▼ ▼ ▼ ▼ ▼
|
||
Cout S3 S1 S0 S0
|
||
</code></pre>
|
||
<p>Description of the <strong>init</strong> method.</p>
|
||
<h2 id="args">Args</h2>
|
||
<dl>
|
||
<dt><strong><code>a</code></strong> : <code>Bus</code></dt>
|
||
<dd>First input bus.</dd>
|
||
<dt><strong><code>b</code></strong> : <code>Bus</code></dt>
|
||
<dd>Second input bus.</dd>
|
||
<dt><strong><code>cla_block_size</code></strong> : <code>int</code>, optional</dt>
|
||
<dd>Size of each composite cla adder block size. Defaults to 4.</dd>
|
||
<dt><strong><code>prefix</code></strong> : <code>str</code>, optional</dt>
|
||
<dd>Prefix name of unsigned cla. Defaults to "".</dd>
|
||
<dt><strong><code>name</code></strong> : <code>str</code>, optional</dt>
|
||
<dd>Name of unsigned cla. Defaults to "u_cla".</dd>
|
||
</dl></div>
|
||
<details class="source">
|
||
<summary>
|
||
<span>Expand source code</span>
|
||
</summary>
|
||
<pre><code class="python">class UnsignedCarryLookaheadAdder(ArithmeticCircuit):
|
||
"""Class representing unsigned carry-lookahead adder.
|
||
|
||
Unsigned carry-lookahead adder represents faster adder circuit which is composed
|
||
of more complex circuitry but provides much less propagation delay as opposed to rca.
|
||
It is mainly composed of propagate/generate blocks and many AND/OR gates to calculate carries individually.
|
||
|
||
Class enables to choose the size of composite inner cla blocks (default is 4). These cla blocks are then cascaded
|
||
to form the final N bit adder.
|
||
|
||
```
|
||
B3 A3 B2 A2 B1 A1 B0 A0
|
||
│ │ │ │ │ │ │ │
|
||
┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐ ┌─▼──▼─┐
|
||
│ PG │ │ PG │ │ PG │ │ PG │
|
||
│ block│ │ block│ │ block│ │ block│
|
||
│ │ │ │ │ │ │ │
|
||
└─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘ └─┬┬┬──┘
|
||
│││G3P3S3 │││G2P2S2 │││G1P1S1 │││G0P0S0
|
||
┌─▼▼▼────────▼▼▼────────▼▼▼────────▼▼▼──┐
|
||
│ Carry Lookahead logic │
|
||
│ │
|
||
└┬────┬───────┬──────────┬──────────┬───┘
|
||
│ │ │ │ │
|
||
▼ ▼ ▼ ▼ ▼
|
||
Cout S3 S1 S0 S0
|
||
```
|
||
|
||
Description of the __init__ method.
|
||
|
||
Args:
|
||
a (Bus): First input bus.
|
||
b (Bus): Second input bus.
|
||
cla_block_size (int, optional): Size of each composite cla adder block size. Defaults to 4.
|
||
prefix (str, optional): Prefix name of unsigned cla. Defaults to "".
|
||
name (str, optional): Name of unsigned cla. Defaults to "u_cla".
|
||
"""
|
||
def __init__(self, a: Bus, b: Bus, cla_block_size: int = 4, prefix: str = "", name: str = "u_cla", **kwargs):
|
||
self.N = max(a.N, b.N)
|
||
super().__init__(a=a, b=b, prefix=prefix, name=name, out_N=self.N+1, **kwargs)
|
||
|
||
# Bus sign extension in case buses have different lengths
|
||
self.a.bus_extend(N=self.N, prefix=a.prefix)
|
||
self.b.bus_extend(N=self.N, prefix=b.prefix)
|
||
|
||
# To signify current number of blocks and number of bits that remain to be added into function blocks
|
||
N_blocks = 0
|
||
N_wires = self.N
|
||
cin = ConstantWireValue0()
|
||
|
||
while N_wires != 0:
|
||
# Lists containing all propagate/generate wires
|
||
self.propagate = []
|
||
self.generate = []
|
||
# Cin0 used as a first generate wire for obtaining next carry bits
|
||
self.generate.append(cin)
|
||
block_size = cla_block_size if N_wires >= cla_block_size else N_wires
|
||
|
||
# Gradual addition of propagate/generate logic blocks and AND/OR gates for Cout bits generation, XOR gates for Sum bits generation
|
||
for i in range(block_size):
|
||
pg_block = PGLogicBlock(self.a.get_wire((N_blocks*cla_block_size)+i), self.b.get_wire((N_blocks*cla_block_size)+i), prefix=self.prefix+"_pg_logic"+str(self.get_instance_num(cls=PGLogicBlock)))
|
||
self.propagate.append(pg_block.get_propagate_wire())
|
||
self.generate.append(pg_block.get_generate_wire())
|
||
self.add_component(pg_block)
|
||
|
||
if i == 0 and N_blocks == 0:
|
||
obj_sum_xor = XorGate(pg_block.get_sum_wire(), cin, prefix=self.prefix+"_xor"+str(self.get_instance_num(cls=XorGate)), parent_component=self)
|
||
self.add_component(obj_sum_xor)
|
||
self.out.connect(i+(N_blocks*cla_block_size), obj_sum_xor.out)
|
||
|
||
# Carry propagation calculation
|
||
obj_and = AndGate(self.propagate[(N_blocks*cla_block_size)+i], self.generate[(N_blocks*cla_block_size)+i], prefix=self.prefix+"_and"+str(self.get_instance_num(cls=AndGate)), parent_component=self)
|
||
self.add_component(obj_and)
|
||
|
||
# Carry bit generation
|
||
obj_cout_or = OrGate(pg_block.get_generate_wire(), self.get_previous_component().out, prefix=self.prefix+"_or"+str(self.get_instance_num(cls=OrGate, count_disabled_gates=False)), parent_component=self)
|
||
self.add_component(obj_cout_or)
|
||
else:
|
||
obj_sum_xor = XorGate(pg_block.get_sum_wire(), self.get_previous_component(2).out, prefix=self.prefix+"_xor"+str(self.get_instance_num(cls=XorGate)), parent_component=self)
|
||
self.add_component(obj_sum_xor)
|
||
self.out.connect(i+(N_blocks*cla_block_size), obj_sum_xor.out)
|
||
|
||
# List of AND gates outputs that are later combined in a multi-bit OR gate
|
||
composite_or_gates_inputs = []
|
||
|
||
for g_index in range(len(self.generate)-1):
|
||
composite_wires = []
|
||
# Getting a list of wires used for current bit position cout composite AND gate's generation
|
||
# E.g. for Cout2 = G1 + G0·P1 C0·P0·P1 it gets a list containing [C0,P0,P1] then [G0,P1]
|
||
composite_wires.append(self.generate[g_index])
|
||
for p_index in range(len(self.propagate)-1, g_index-1, -1):
|
||
composite_wires.append(self.propagate[p_index])
|
||
|
||
# For each pg pair values algorithmically combine two input AND gates to replace multiple input gates (resolves fan-in issue)
|
||
pg_wires = Bus(wires_list=composite_wires)
|
||
multi_bit_and_gate = MultipleInputLogicGate(a=pg_wires, two_input_gate_cls=AndGate, prefix=self.prefix+"_and", parent_component=self)
|
||
composite_or_gates_inputs.append(multi_bit_and_gate.out)
|
||
|
||
# Final OR gates cascade using generated AND gates output wires
|
||
composite_or_wires = Bus(wires_list=composite_or_gates_inputs)
|
||
multi_bit_or_gate = MultipleInputLogicGate(a=composite_or_wires, two_input_gate_cls=OrGate, prefix=self.prefix+"_or", parent_component=self)
|
||
|
||
# Carry bit generation
|
||
obj_cout_or = OrGate(pg_block.get_generate_wire(), multi_bit_or_gate.out, prefix=self.prefix+"_or"+str(self.get_instance_num(cls=OrGate, count_disabled_gates=False)), parent_component=self)
|
||
self.add_component(obj_cout_or)
|
||
|
||
# Updating cin for the the next bypass block
|
||
# Also updating cout value which is used as cin for the first adder of the next block
|
||
cin = obj_cout_or.out
|
||
|
||
N_wires -= block_size
|
||
N_blocks += 1
|
||
|
||
# Connection of final Cout
|
||
self.out.connect(self.N, cin)</code></pre>
|
||
</details>
|
||
<h3>Ancestors</h3>
|
||
<ul class="hlist">
|
||
<li><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit" href="../../core/arithmetic_circuits/arithmetic_circuit.html#ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit">ArithmeticCircuit</a></li>
|
||
<li><a title="ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit">GeneralCircuit</a></li>
|
||
</ul>
|
||
<h3>Subclasses</h3>
|
||
<ul class="hlist">
|
||
<li><a title="ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.SignedCarryLookaheadAdder" href="#ariths_gen.multi_bit_circuits.adders.carry_lookahead_adder.SignedCarryLookaheadAdder">SignedCarryLookaheadAdder</a></li>
|
||
</ul>
|
||
<h3>Inherited members</h3>
|
||
<ul class="hlist">
|
||
<li><code><b><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit" href="../../core/arithmetic_circuits/arithmetic_circuit.html#ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit">ArithmeticCircuit</a></b></code>:
|
||
<ul class="hlist">
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.add_component" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.add_component">add_component</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_blif_code_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_blif_code_flat">get_blif_code_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_blif_code_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_blif_code_hier">get_blif_code_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_c_code_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_c_code_flat">get_c_code_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_c_code_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_c_code_hier">get_c_code_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_carry_wire" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_carry_wire">get_carry_wire</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_cgp_code_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_cgp_code_flat">get_cgp_code_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_cgp_wires" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_cgp_wires">get_cgp_wires</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_circuit_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_circuit_blif">get_circuit_blif</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_circuit_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_circuit_c">get_circuit_c</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_circuit_gates" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_circuit_gates">get_circuit_gates</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_circuit_v" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_circuit_v">get_circuit_v</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_circuit_wire_index" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_circuit_wire_index">get_circuit_wire_index</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_component_types" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_component_types">get_component_types</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_declaration_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declaration_blif">get_declaration_blif</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_declaration_c_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declaration_c_flat">get_declaration_c_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_declaration_c_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declaration_c_hier">get_declaration_c_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_declaration_v_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declaration_v_flat">get_declaration_v_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_declaration_v_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declaration_v_hier">get_declaration_v_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_declarations_c_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declarations_c_hier">get_declarations_c_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_declarations_v_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_declarations_v_hier">get_declarations_v_hier</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_blif_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_blif_flat">get_function_blif_flat</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_block_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_block_blif">get_function_block_blif</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_block_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_block_c">get_function_block_c</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_block_v" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_block_v">get_function_block_v</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_blocks_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_blocks_blif">get_function_blocks_blif</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_blocks_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_blocks_c">get_function_blocks_c</a></code></li>
|
||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_blocks_v" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_blocks_v">get_function_blocks_v</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_out_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_blif">get_function_out_blif</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_out_c_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_c_flat">get_function_out_c_flat</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_out_c_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_c_hier">get_function_out_c_hier</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_out_python_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_python_flat">get_function_out_python_flat</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_out_v_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_v_flat">get_function_out_v_flat</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_function_out_v_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_function_out_v_hier">get_function_out_v_hier</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_includes_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_includes_c">get_includes_c</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_init_c_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_init_c_flat">get_init_c_flat</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_init_c_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_init_c_hier">get_init_c_hier</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_init_python_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_init_python_flat">get_init_python_flat</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_init_v_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_init_v_flat">get_init_v_flat</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_init_v_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_init_v_hier">get_init_v_hier</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_instance_num" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_instance_num">get_instance_num</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_invocation_blif_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_invocation_blif_hier">get_invocation_blif_hier</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_invocations_blif_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_invocations_blif_hier">get_invocations_blif_hier</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_multi_bit_components" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_multi_bit_components">get_multi_bit_components</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_one_bit_components" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_one_bit_components">get_one_bit_components</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_out_invocation_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_out_invocation_c">get_out_invocation_c</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_out_invocation_v" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_out_invocation_v">get_out_invocation_v</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_outputs_cgp" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_outputs_cgp">get_outputs_cgp</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_parameters_cgp" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_parameters_cgp">get_parameters_cgp</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_previous_component" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_previous_component">get_previous_component</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_prototype_blif" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_prototype_blif">get_prototype_blif</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_prototype_c" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_prototype_c">get_prototype_c</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_prototype_python" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_prototype_python">get_prototype_python</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_prototype_v" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_prototype_v">get_prototype_v</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_python_code_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_python_code_flat">get_python_code_flat</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_sum_wire" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_sum_wire">get_sum_wire</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_triplets_cgp" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_triplets_cgp">get_triplets_cgp</a></code></li>
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||
<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_unique_types" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_unique_types">get_unique_types</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_v_code_flat" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_v_code_flat">get_v_code_flat</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.get_v_code_hier" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.get_v_code_hier">get_v_code_hier</a></code></li>
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<li><code><a title="ariths_gen.core.arithmetic_circuits.arithmetic_circuit.ArithmeticCircuit.save_wire_id" href="../../core/arithmetic_circuits/general_circuit.html#ariths_gen.core.arithmetic_circuits.general_circuit.GeneralCircuit.save_wire_id">save_wire_id</a></code></li>
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