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Fix arbitration for non-power-of-two numbers of sources

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Peter Rugg
2021-05-28 14:37:24 +01:00
parent bf911326e3
commit 10f0807a9b
1 changed files with 1 additions and 1 deletions
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src_Core/RISCY_OOO/coherence/src/CrossBar.bsv
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@@ -102,7 +102,7 @@ module mkXBar#(
end
endfunction
// find the first valid source starting at srcRR[dst]
Vector#(srcNum, srcIdxT) srcIdxVec = rotateBy(genWith(fromInteger), -unpack(srcRR[dst]));
Vector#(srcNum, srcIdxT) srcIdxVec = reverse(rotateBy(reverse(genWith(fromInteger)), unpack(srcRR[dst]))); // Double reverse to achieve rotateBy left, since it's not provided by Bluespec
Maybe#(srcIdxT) whichSrc = fmap(select(srcIdxVec), searchIndex(isFromSrc, srcIdxVec)); // the src to select
if(whichSrc matches tagged Valid .src) begin
// can do enq & deq