diff options
Diffstat (limited to 'src/main/scala/Chisel/Log2.scala')
| -rw-r--r-- | src/main/scala/Chisel/Log2.scala | 35 |
1 files changed, 0 insertions, 35 deletions
diff --git a/src/main/scala/Chisel/Log2.scala b/src/main/scala/Chisel/Log2.scala deleted file mode 100644 index 01b081ef..00000000 --- a/src/main/scala/Chisel/Log2.scala +++ /dev/null @@ -1,35 +0,0 @@ -package Chisel - -// TODO: these operators should be backend nodes so their width can be -// inferred, rather than using getWidth. also, C++ perf would improve. - -object Log2 { - def apply(x: Bits, width: Int): UInt = { - if (width < 2) UInt(0) - else if (width == 2) x(1) - else Mux(x(width-1), UInt(width-1), apply(x, width-1)) - } - - def apply(x: Bits): UInt = apply(x, x.getWidth) -} - -object OHToUInt { - def apply(in: Seq[Bool]): UInt = apply(Vec(in)) - def apply(in: Vec[Bool]): UInt = apply(in.toBits, in.size) - def apply(in: Bits): UInt = apply(in, in.getWidth) - - def apply(in: Bits, width: Int): UInt = { - if (width <= 2) Log2(in, width) - else { - val mid = 1 << (log2Up(width)-1) - val hi = in(width-1, mid) - val lo = in(mid-1, 0) - Cat(hi.orR, apply(hi | lo, mid)) - } - } -} - -object PriorityEncoder { - def apply(in: Seq[Bool]): UInt = PriorityMux(in, (0 until in.size).map(UInt(_))) - def apply(in: Bits): UInt = apply(in.toBools) -} |
