From 228a299a755d3147d1862c7f8fb26d216ff915c0 Mon Sep 17 00:00:00 2001
From: Alex Van Damme <atv@google.com>
Date: Mon, 14 Apr 2025 11:16:57 -0700
Subject: [PATCH] Fix max_num_lanes issue in DC

---
 src/fpnew_pkg.sv | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/fpnew_pkg.sv b/src/fpnew_pkg.sv
index 7addc3e..12eec6b 100644
--- a/src/fpnew_pkg.sv
+++ b/src/fpnew_pkg.sv
@@ -393,7 +393,19 @@ package fpnew_pkg;
 
   // Returns the maximum number of lanes in the FPU according to width, format config and vectors
   function automatic int unsigned max_num_lanes(int unsigned width, fmt_logic_t cfg, logic vec);
-    return vec ? width / min_fp_width(cfg) : 1; // if no vectors, only one lane
+    // return vec ? width / min_fp_width(cfg) : 1; // if no vectors, only one lane
+    if (vec) begin
+      automatic int unsigned res = max_fp_width(cfg);
+      for (int unsigned i = 0; i < NUM_FP_FORMATS; i++) begin
+        if (cfg[i]) begin
+          automatic int unsigned format_width = FP_ENCODINGS[i].exp_bits + FP_ENCODINGS[i].man_bits + 1;
+          res = unsigned'(minimum(res, format_width));
+        end
+      end
+      return width / res;
+    end else begin
+      return 1;
+    end
   endfunction
 
   // Returns a mask of active FP formats that are present in lane lane_no of a multiformat slice
-- 
2.49.0.604.gff1f9ca942-goog