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DescriptionQ563
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Q563DVASIC interview problem

Popcount an arbitrary bit vector

TechniquesPacked vectorPopcount
DifficultyEasy
TopicVerification Utilities
LanguageSystemVerilog
Requirements2 checkpoints
01

Problem

Return the number of 1 bits in a packed bit vector.

Example input and output

Use this case to check your interpretation
Input
bits = 12'b1010_0011_0101
Output
6
Explanation

The count covers the full supplied vector width rather than assuming a fixed 32-bit value.

02

Requirements (2)

  • Derive the loop bound from $bits(v).
  • Count only known 1 values.