Abstract: Methods and apparatuses to provide FPGA inter-tile control signal sharing are described. In one embodiment, the FPGA inter-tile muxing for control signals is added in a separate tile. In another embodiment, the control signal muxing is distributed among FPGA tiles and shared using a cascaded configuration.

Abstract: Delay elements and multiplexers are in programmable delay elements. Each programmable delay element has a chain of delay elements to produce successive delays of a clock of the programmable delay element. Each programmable delay element has a first multiplexer to select among an input clock and delay element outputs in the chain of delay elements to produce a skewed clock output of the programmable delay element. In at least a subset of the programmable delay elements, each programmable delay element has a second multiplexer to select among clocks that include a first clock, and a second clock that is from one of the delay elements of another programmable delay element to produce the clock of the programmable delay element.

Abstract: A field programmable gate array (FPGA) has non-highway wire segments for connection to logic blocks, and highway wire segments in a highway network of highways. Each highway has sets of highway wire segments in successive connection. Each successive connection is through a multiplexer. Multiplexers of highways have on-ramps, off-ramps, or both, for programmable connection to wire segments in accordance with programming the FPGA.

Abstract: Methods and apparatuses to provide FPGA inter-tile control signal sharing are described. In one embodiment, the FPGA inter-tile muxing for control signals is added in a separate tile. In another embodiment, the control signal muxing is distributed among FPGA tiles and shared using a cascaded configuration.

Abstract: Delay elements and multiplexers are in programmable delay elements. Each programmable delay element has a chain of delay elements to produce successive delays of a clock of the programmable delay element. Each programmable delay element has a first multiplexer to select among an input clock and delay element outputs in the chain of delay elements to produce a skewed clock output of the programmable delay element. In at least a subset of the programmable delay elements, each programmable delay element has a second multiplexer to select among clocks that include a first clock, and a second clock that is from one of the delay elements of another programmable delay element to produce the clock of the programmable delay element.

Abstract: Methods and apparatuses to provide FPGA neighbor output mux direct connections to reduce, and potentially minimize, routing hops are described. Embodiments described herein include the addition of direct connections from one tile to the output muxing of a neighboring tile. An FPGA apparatus includes a plurality of logic block tiles. One or more direct connections extend from one or more logic block tiles of the plurality of logic block tiles to one or more inputs of output multiplexors (muxes) of one or more neighboring logic block tiles. The one or more direct connections are configured to drive one or more wires that start at the one or more neighboring logic block tiles.

Abstract: Methods and apparatuses to provide FPGA inter-tile control signal sharing are described. In one embodiment, the FPGA inter-tile muxing for control signals is added in a separate tile. In another embodiment, the control signal muxing is distributed among FPGA tiles and shared using a cascaded configuration.

Abstract: An adder is implemented in a field programmable gate array (FPGA). The adder has a first ripple carry adder block, for least significant bits of the adder. The adder has a plurality of carry skip adder blocks of differing block sizes. Each block size relates to bit-width of input to a block. The carry skip adder blocks of differing block sizes are for a plurality of bits of the adder. The adder has a second ripple carry adder block, for most significant bits of the adder.

Abstract: A field programmable gate array (FPGA) has non-highway wire segments for connection to logic blocks, and highway wire segments in a highway network of highways. Each highway has sets of highway wire segments in successive connection. Each successive connection is through a multiplexer. Multiplexers of highways have on-ramps, off-ramps, or both, for programmable connection to wire segments in accordance with programming the FPGA.

Abstract: Delay elements and multiplexers are in programmable delay elements. Each programmable delay element has a chain of delay elements to produce successive delays of a clock of the programmable delay element. Each programmable delay element has a first multiplexer to select among an input clock and delay element outputs in the chain of delay elements to produce a skewed clock output of the programmable delay element. In at least a subset of the programmable delay elements, each programmable delay element has a second multiplexer to select among clocks that include a first clock, and a second clock that is from one of the delay elements of another programmable delay element to produce the clock of the programmable delay element.

Abstract: A computer aided design (CAD) system receives a high level coding of a design for a circuit to be implemented in a field programmable gate array (FPGA). The system performs synthesis on the design, to produce a synthesized design. The system generates a routability estimation and a logic usage estimation for the synthesized design. The system determines whether the synthesized design is implementable on a specific FPGA, based on the routability estimation, the logic usage estimation, and available resources of the specific FPGA.

Abstract: A field programmable gate array (FPGA) has a 4-LUT (lookup table) that has four stages of multiplexers. The 4-LUT is fracturable. The 4-LUT being fracturable includes the capability to implement multiple LUTs in an instance of FPGA programming for functions from a group that includes adder functions and further functions. The 4-LUT has outputs exposed to programmable connection in accordance with FPGA programming. Outputs of the 4-LUT include an output of a first multiplexer in the third stage, an output of a multiplexer in the second stage, and an output of a multiplexer in the second or third stage of the 4-LUT.