Skip to content

feat(BitUtils): add UIntToOHSeq and corresponding CircularShiftSeq #133

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
Tang-Haojin merged 1 commit into from
Dec 5, 2025
Merged

feat(BitUtils): add UIntToOHSeq and corresponding CircularShiftSeq #133

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
18 changes: 18 additions & 0 deletions src/main/scala/utility/BitUtils.scala
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -53,8 +53,24 @@ class CircularShift(data: UInt) {
def right(step: Int): UInt = helper(step, false)
}

class CircularShiftSeq(data: Seq[Bool]) {
private val width = data.length
private def helper(step: Int, isLeft: Boolean): Seq[Bool] = {
val shiftStep = step % width
val shifted = if (isLeft) {
data.takeRight(shiftStep) ++ data.dropRight(shiftStep)
} else {
data.drop(shiftStep) ++ data.take(shiftStep)
}
shifted
}
def left(step: Int): Seq[Bool] = helper(step, true)
def right(step: Int): Seq[Bool] = helper(step, false)
}

object CircularShift {
def apply(data: UInt): CircularShift = new CircularShift(data)
def apply(data: Seq[Bool]): CircularShiftSeq = new CircularShiftSeq(data)
}

object WordShift {
Expand Down Expand Up @@ -117,6 +133,8 @@ object OneHot {
def checkOneHot(in: Bits): Unit = assert(PopCount(in) <= 1.U)
def checkOneHot(in: Iterable[Bool]): Unit = assert(PopCount(in) <= 1.U)
def OHToUIntStartOne(in: UInt): UInt = OHToUInt(in << 1)
def UIntToOHSeq(in: UInt, width: Int): Seq[Bool] = (0 until width).map(i => in === i.U)
def UIntToOHSeq(in: UInt): Seq[Bool] = UIntToOHSeq(in, in.getWidth)
}

object LowerMask {
Expand Down