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-rw-r--r--rtl/core/control/control.sv9
1 files changed, 9 insertions, 0 deletions
diff --git a/rtl/core/control/control.sv b/rtl/core/control/control.sv
index 059cb2d..c1ac5a1 100644
--- a/rtl/core/control/control.sv
+++ b/rtl/core/control/control.sv
@@ -19,6 +19,10 @@ module core_control
mem_ready,
input word mem_data_rd,
+`ifdef VERILATOR
+ input word insn,
+`endif
+
output logic stall,
branch,
writeback,
@@ -154,6 +158,11 @@ module core_control
writeback <= final_writeback;
undefined <= dec.undefined;
+`ifdef VERILATOR
+ if(dec.undefined)
+ $display("[core] undefined insn: [0x%08x] %08x", fetch_insn_pc << 2, insn);
+`endif
+
rd <= final_rd;
pc <= fetch_insn_pc;
pc_visible <= next_pc_visible;