H3 Class Hash

ENTITY H3_HASH IS

Component for computing any hash function from universal H3 class. Universal hash functions have some interesting properties, for reference, check out this paper: https://www.cs.princeton.edu/courses/archive/fall09/cos521/Handouts/universalclasses.pdf. This component has default latency of 0 clock cycles, for larger inputs and outputs one can enable one pipeline stage and output register.

Generics

Generic	Type	Default	Description
DATA_WIDTH	natural	256	Width of data, which will be hashed, currently supporting DATA_WIDTH <= 256
HASH_WIDTH	natural	64	Resulting hash width, currently supporting HASH_WIDTH <= 64
H3_TYPE	string	“AUTO”	Type of hash core, which will be used. Those are precomputed and stored in h3_pack.vhd. Names are defined like this: H3C_(input_width)x(output_width). Available values are: “H3C_64x16” “H3C_64x22” “H3C_22x11” “H3C_256x64” “AUTO” - hash core will be selected automatically
PIPELINE	boolean	true	One pipeline stage will be inserted into H3 hash function, adding latency of 1 clock cycle.
OUT_REG	boolean	true	Add output register.

Ports

Port	Type	Mode	Description
CLK	std_logic	in
RESET	std_logic	in
DATA_IN	std_logic_vector(DATA_WIDTH - 1 downto 0)	in	Input data
DATA_IN_VLD	std_logic	in
DATA_IN_RDY	std_logic	out
DATA_OUT	std_logic_vector(HASH_WIDTH - 1 downto 0)	out	Output hash
DATA_OUT_VLD	std_logic	out
DATA_OUT_RDY	std_logic	in