From fd8f6b112a8a7545d58d1c6974c1214b85252709 Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Sun, 29 May 2022 16:33:56 -0700
Subject: Single-cycle bypass when there is no contention on memory arbiter.

---
 hdl/mem_arbiter.sv | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'hdl')

diff --git a/hdl/mem_arbiter.sv b/hdl/mem_arbiter.sv
index e39317d..854867f 100644
--- a/hdl/mem_arbiter.sv
+++ b/hdl/mem_arbiter.sv
@@ -62,6 +62,17 @@ module mem_arbiter
                 end
             end
 
+            if (hold_valid != 0 && !ram_valid) begin
+                for (int i = 0; i < `NUM_PDPS+1; ++i) begin
+                    if (hold_valid == 1 << i) begin
+                        ram_valid = 1;
+                        ram_data = hold_data[i];
+                        hold_valid[i] = 0;
+                        break;
+                    end
+                end
+            end
+
             if (hold_valid != 0 && (selector_stale || !ram_valid)) begin
                 for (int i = 0; i < `NUM_PDPS+1; ++i) begin
                     automatic int j = selector + i;
-- 
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