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Comparator: tolerate mismatched data when it is undefined

This commit is contained in:
Wesley W. Terpstra 2016-09-22 14:41:50 -07:00
parent ed038678ef
commit 9f1f6fc61f
1 changed files with 8 additions and 1 deletions
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9
src/main/scala/groundtest/Comparator.scala
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@ -336,10 +336,17 @@ class ComparatorSink(implicit val p: Parameters) extends Module
base.addr_beat === g.addr_beat || !g.hasData(),
base.data === g.data || !g.hasData())
// TL1 likes to duplicate 32-bits into both halves of a 64-bit value
// TL2 doesn't do this, so they compare differently when they are the same
def isDupd(x: UInt) = if (tlDataBytes != 8) Bool(false) else x(31, 0) === x(63, 32)
def safeCompare(x: UInt, y: UInt) =
Mux(!isDupd(x) && !isDupd(y), x === y, x(63,32) === y(63,32) || x(31,0) === y(31,0))
assert (g.is_builtin_type, "grant not builtin")
assert (base.g_type === g.g_type, "g_type mismatch")
assert (base.addr_beat === g.addr_beat || !g.hasMultibeatData(), "addr_beat mismatch")
assert (base.data === g.data || !g.hasData(), "data mismatch")
assert (base.data === g.data || !g.hasMultibeatData(), "multibeat data mismatch")
assert (safeCompare(base.data, g.data) || !g.hasData(), "singlebeat data mismatch")
assert_conds.zipWithIndex.foreach { case (cond, i) =>
when (!cond) {