From 7a93056b8b44c567cd2b7f9dd0df5e3ffbbfe519 Mon Sep 17 00:00:00 2001
From: jon <jonwoodruff@gmail.com>
Date: Tue, 11 Aug 2020 15:30:03 +0100
Subject: [PATCH] Increase the capacity of f32d to enable full throughput. I
 don't know why this is necessary, but this allows performance parity with the
 baseline.

---
 src_Core/RISCY_OOO/procs/RV64G_OOO/FetchStage.bsv | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src_Core/RISCY_OOO/procs/RV64G_OOO/FetchStage.bsv b/src_Core/RISCY_OOO/procs/RV64G_OOO/FetchStage.bsv
index 866fa9c..b6a476e 100644
--- a/src_Core/RISCY_OOO/procs/RV64G_OOO/FetchStage.bsv
+++ b/src_Core/RISCY_OOO/procs/RV64G_OOO/FetchStage.bsv
@@ -343,7 +343,7 @@ module mkFetchStage(FetchStage);
     // Pipeline Stage FIFOs
     Fifo#(2, Tuple2#(Bit#(TLog#(SupSizeX2)),Fetch1ToFetch2)) f12f2 <- mkCFFifo;
     Fifo#(4, Tuple2#(Bit#(TLog#(SupSizeX2)),Fetch2ToFetch3)) f22f3 <- mkCFFifo; // FIFO should match I$ latency
-    SupFifo#(SupSizeX2, 2, Fetch3ToDecode) f32d <- mkSupFifo;
+    SupFifo#(SupSizeX2, 3, Fetch3ToDecode) f32d <- mkSupFifo; // This fifo needs a capacity of 3 for full throughput.  Unknown why.
     SupFifo#(SupSize, 2, FromFetchStage) out_fifo <- mkSupFifo;
        // Can the fifo size be smaller?