Inference in hardware description languages (such as System Verilog) refers to the process by which logic cells or hardware components are automati- cally generated from the behavioral code. Synthesis tools will automatically infer which logic gates and other hardware components are necessary to implement the specified behavior. Additionally, when mapping a synthesized design to a specified target (FPGA/ASIC), the synthesis tool will need to adjust its netlist to ensure that it only uses what logic cells are available. For example, an FPGA without any dedicated adder cells must use the gates it has available to implement an adder if one was described behaviorally. Assume an RTL designer created an adder by writing: assign y = a + b; where a, b, and y are each 1 bit wide. Draw the circuit of what an optimized synthesis tool would generate assuming the target is... (a) an FPGA with only NAND gates. (b) an FPGA with only full-adders. (c) an FPGA with only 2-input MUXes. (d) a Xilinx FPGA with only 4-bit look-up tables (LUT4).

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Chapter1: Computer Networks And The Internet
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THIS DOES NOT VIOLATE THE HONOR CODE. THIS IS NEITHER HOMEWORK OR AN EXAM, this is for practice, 

Inference in hardware description languages (such as System Verilog)
refers to the process by which logic cells or hardware components are automati-
cally generated from the behavioral code. Synthesis tools will automatically infer
which logic gates and other hardware components are necessary to implement the
specified behavior. Additionally, when mapping a synthesized design to a specified
target (FPGA/ASIC), the synthesis tool will need to adjust its netlist to ensure
that it only uses what logic cells are available. For example, an FPGA without any
dedicated adder cells must use the gates it has available to implement an adder if
one was described behaviorally.
Assume an RTL designer created an adder by writing: assign y = a + b; where
a, b, and y are each 1 bit wide. Draw the circuit of what an optimized synthesis
tool would generate assuming the target is...
(a) an FPGA with only NAND gates.
(b) an FPGA with only full-adders.
(c) an FPGA with only 2-input MUXes.
(d) a Xilinx FPGA with only 4-bit look-up tables (LUT4).
Transcribed Image Text:Inference in hardware description languages (such as System Verilog) refers to the process by which logic cells or hardware components are automati- cally generated from the behavioral code. Synthesis tools will automatically infer which logic gates and other hardware components are necessary to implement the specified behavior. Additionally, when mapping a synthesized design to a specified target (FPGA/ASIC), the synthesis tool will need to adjust its netlist to ensure that it only uses what logic cells are available. For example, an FPGA without any dedicated adder cells must use the gates it has available to implement an adder if one was described behaviorally. Assume an RTL designer created an adder by writing: assign y = a + b; where a, b, and y are each 1 bit wide. Draw the circuit of what an optimized synthesis tool would generate assuming the target is... (a) an FPGA with only NAND gates. (b) an FPGA with only full-adders. (c) an FPGA with only 2-input MUXes. (d) a Xilinx FPGA with only 4-bit look-up tables (LUT4).
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