A packed array is guaranteed to be represented as a contiguous set of bits in simulation and synthesis. Packed array divides a vector into subfields, which can be accessed as array elements. Int Array // unpacked array declaration using sizes Packed ArraysĪ one-dimensional packed array is also called a vector. Int Array // unpacked array declaration using ranges Unpacked array refers to the dimensions declared after the data identifier name.īit c1 // packed array of scalar bit Packed array refers to dimensions declared after the type and before the data identifier name. SystemVerilog arrays can be either packed or unpacked. In this article, we’ll take a look at the synthesizable features of SystemVerilog Arrays we can use when writing design RTL. In comparison, SystemVerilog arrays have greatly expanded capabilities both for writing synthesizable RTL, and for writing non-synthesizable test benches. In my last article on plain old Verilog Arrays, I discussed their very limited feature set.
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