diff options
Diffstat (limited to 'src/main/scala/chisel3')
| -rw-r--r-- | src/main/scala/chisel3/util/BitPat.scala | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/src/main/scala/chisel3/util/BitPat.scala b/src/main/scala/chisel3/util/BitPat.scala index 83475d1b..7c0abdb2 100644 --- a/src/main/scala/chisel3/util/BitPat.scala +++ b/src/main/scala/chisel3/util/BitPat.scala @@ -14,7 +14,7 @@ object BitPat { * @return bits the literal value, with don't cares being 0 * @return mask the mask bits, with don't cares being 0 and cares being 1 * @return width the number of bits in the literal, including values and - * don't cares. + * don't cares, but not including the white space and underscores */ private def parse(x: String): (BigInt, BigInt, Int) = { // Notes: @@ -25,14 +25,17 @@ object BitPat { require(x.head == 'b', "BitPats must be in binary and be prefixed with 'b'") var bits = BigInt(0) var mask = BigInt(0) + var count = 0 for (d <- x.tail) { - if (d != '_') { + if (! (d == '_' || d.isWhitespace)) { require("01?".contains(d), "Literal: " + x + " contains illegal character: " + d) mask = (mask << 1) + (if (d == '?') 0 else 1) bits = (bits << 1) + (if (d == '1') 1 else 0) + count += 1 } } - (bits, mask, x.length - 1) + + (bits, mask, count) } /** Creates a [[BitPat]] literal from a string. |