Oups. I forgot to update other do files with the commands to preload the branch predictor memories.

wally-pipelined/regression/regression-wally.py

@@ -30,6 +30,7 @@ def test_config(config, print_res=True):
     passed = search_log_for_text("no more .* to read", logname)
   else:
     cmd = "vsim -c >" + logname +" <<!\ndo wally-pipelined-batch-parallel.do ../config/" + config + " " + config + "\n!\n"
+    print(cmd)
     os.system(cmd)
     # check for success.  grep returns 0 if found, 1 if not found
     passed = search_log_for_text("All tests ran without failures", logname)

wally-pipelined/regression/wally-busybear.do

@@ -32,6 +32,15 @@ vlog +incdir+../config/busybear ../testbench/*.sv ../src/*/*.sv -suppress 2583
 # remove +acc flag for faster sim during regressions if there is no need to access internal signals
 vopt +acc work.testbench_busybear -o workopt 
 vsim workopt
+
+# load the branch predictors with known data. The value of the data is not important for function, but
+# is important for perventing pessimistic x propagation.
+mem load -infile twoBitPredictor.txt -format bin testbench/dut/hart/ifu/bpred/DirPredictor/memory/memory
+switch $argc {
+    0 {mem load -infile ../config/rv64ic/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+    1 {mem load -infile ../config/$1/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+}
+
 
 view wave
 

wally-pipelined/regression/wally-coremark.do

@@ -35,6 +35,14 @@ vlog +incdir+../config/coremark ../testbench/testbench-coremark.sv ../src/*/*.sv
 vopt +acc work.testbench -o workopt 
 vsim workopt
 
+# load the branch predictors with known data. The value of the data is not important for function, but
+# is important for perventing pessimistic x propagation.
+mem load -infile twoBitPredictor.txt -format bin testbench/dut/hart/ifu/bpred/DirPredictor/memory/memory
+switch $argc {
+    0 {mem load -infile ../config/rv64ic/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+    1 {mem load -infile ../config/$1/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+}
+
 view wave
 
 -- display input and output signals as hexidecimal values

wally-pipelined/regression/wally-peripherals.do

@@ -38,6 +38,14 @@ switch $argc {
 vopt +acc work.testbench -o workopt 
 vsim workopt
 
+# load the branch predictors with known data. The value of the data is not important for function, but
+# is important for perventing pessimistic x propagation.
+mem load -infile twoBitPredictor.txt -format bin testbench/dut/hart/ifu/bpred/DirPredictor/memory/memory
+switch $argc {
+    0 {mem load -infile ../config/rv64ic/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+    1 {mem load -infile ../config/$1/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+}
+
 view wave
 
 -- display input and output signals as hexidecimal values

wally-pipelined/regression/wally-pipelined-batch-parallel.do

@@ -34,5 +34,10 @@ vlog +incdir+$1 ../testbench/testbench-imperas.sv ../src/*/*.sv -suppress 2583
 vopt work.testbench -o workopt 
 vsim workopt
 
+# load the branch predictors with known data. The value of the data is not important for function, but
+# is important for perventing pessimistic x propagation.
+mem load -infile twoBitPredictor.txt -format bin testbench/dut/hart/ifu/bpred/DirPredictor/memory/memory
+mem load -infile BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory
+
 run -all
 quit

wally-pipelined/regression/wally-pipelined-batch.do

@@ -31,8 +31,17 @@ vlog +incdir+$1 ../testbench/testbench-imperas.sv ../src/*/*.sv -suppress 2583
 
 # start and run simulation
 # remove +acc flag for faster sim during regressions if there is no need to access internal signals
-vopt work.testbench -o workopt 
+vopt +acc=+/testbench/dut/hart/ifu/bpred/DirPredictor/memory/memory +acc=+/testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory work.testbench -o workopt 
 vsim workopt
 
+# load the branch predictors with known data. The value of the data is not important for function, but
+# is important for perventing pessimistic x propagation.
+mem load -infile twoBitPredictor.txt -format bin testbench/dut/hart/ifu/bpred/DirPredictor/memory/memory
+switch $argc {
+    0 {mem load -infile ../config/rv64ic/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+    1 {mem load -infile ../config/$1/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+}
+
+
 run -all
 quit

wally-pipelined/regression/wally-pipelined-ross.do

@@ -41,7 +41,10 @@ vsim workopt
 # load the branch predictors with known data. The value of the data is not important for function, but
 # is important for perventing pessimistic x propagation.
 mem load -infile twoBitPredictor.txt -format bin testbench/dut/hart/ifu/bpred/DirPredictor/memory/memory
-mem load -infile BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory
+switch $argc {
+    0 {mem load -infile ../config/rv64ic/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+    1 {mem load -infile ../config/$1/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+}
 
 do wave.do
 add log -r /*

wally-pipelined/regression/wally-pipelined.do

@@ -41,7 +41,10 @@ vsim workopt
 # load the branch predictors with known data. The value of the data is not important for function, but
 # is important for perventing pessimistic x propagation.
 mem load -infile twoBitPredictor.txt -format bin testbench/dut/hart/ifu/bpred/DirPredictor/memory/memory
-mem load -infile BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory
+switch $argc {
+    0 {mem load -infile ../config/rv64ic/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+    1 {mem load -infile ../config/$1/BTBPredictor.txt -format bin testbench/dut/hart/ifu/bpred/TargetPredictor/memory/memory}
+}
 
 view wave
 

wally-pipelined/src/ifu/BTBPredictor.sv

@@ -91,7 +91,7 @@ module BTBPredictor
 				      .WA1(UpdatePCIndex),
 				      .WD1({UpdateInstrClass, UpdateTarget}),
 				      .WEN1(UpdateEN),
-				      .BitWEN1({`XLEN{1'b1}}));
+				      .BitWEN1({4'b0000, {`XLEN{1'b1}}})); // *** definitely not right.
 
 
 endmodule