diff --git a/pipelined/regression/Makefile b/pipelined/regression/Makefile
index 66c48e1a..61057169 100644
--- a/pipelined/regression/Makefile
+++ b/pipelined/regression/Makefile
@@ -11,24 +11,27 @@ make all:
 	# *** Build old tests/imperas-riscv-tests for now;
 	# Delete this part when the privileged tests transition over to tests/wally-riscv-arch-test
 	# Also delete bin/exe2memfile at that point
-	make -C ../../tests/imperas-riscv-tests
-	make -C ../../tests/imperas-riscv-tests XLEN=64
-	cd ../../tests/imperas-riscv-tests; exe2memfile.pl work/*/*.elf
-	cd ../../tests/imperas-riscv-tests; extractFunctionRadix.sh work/*/*.elf.objdump
+	make -C ../../tests/imperas-riscv-tests --jobs
+	make -C ../../tests/imperas-riscv-tests XLEN=64 --jobs
+	#cd ../../tests/imperas-riscv-tests; exe2memfile.pl work/*/*.elf
+	#cd ../../tests/imperas-riscv-tests; extractFunctionRadix.sh work/*/*.elf.objdump
 	
 
 	# Build riscv-arch-test 64 and 32-bit versions
-	make -C ../../addins/riscv-arch-test
-	make -C ../../addins/riscv-arch-test XLEN=32
-	cd ../../addins/riscv-arch-test; elf2hex.sh
-	cd ../../addins/riscv-arch-test; extractFunctionRadix.sh work/*/*/*.elf.objdump
+	make -C ../../addins/riscv-arch-test --jobs
+	make -C ../../addins/riscv-arch-test XLEN=32 --jobs
+	#cd ../../addins/riscv-arch-test; elf2hex.sh
+	#cd ../../addins/riscv-arch-test; extractFunctionRadix.sh work/*/*/*.elf.objdump
 	# extractFunctionRadix. ***
 
 	# Build wally-riscv-arch-test
-	make -C ../../tests/wally-riscv-arch-test/
-	make -C ../../tests/wally-riscv-arch-test/ XLEN=32 
-	cd ../../tests/wally-riscv-arch-test; elf2hex.sh
-	cd ../../tests/wally-riscv-arch-test; extractFunctionRadix.sh work/*/*/*.elf.objdump
+	make -C ../../tests/wally-riscv-arch-test/ --jobs
+	make -C ../../tests/wally-riscv-arch-test/ XLEN=32  --jobs
+
+# build the memfiles and address files.
+	make -f makefile-memfile wally-sim-files --jobs
+	#cd ../../tests/wally-riscv-arch-test; elf2hex.sh
+	#cd ../../tests/wally-riscv-arch-test; extractFunctionRadix.sh work/*/*/*.elf.objdump
 	# ***extractFunctionRadix
 
 	# Only compile Imperas tests if they are installed locally.  
diff --git a/pipelined/regression/makefile-memfile b/pipelined/regression/makefile-memfile
new file mode 100644
index 00000000..030cf8d5
--- /dev/null
+++ b/pipelined/regression/makefile-memfile
@@ -0,0 +1,37 @@
+ROOT	:= ../..
+SUFFIX	:= work
+ARCHDIR	:= $(ROOT)/addins/riscv-arch-test
+WALLYDIR:= $(ROOT)/tests/wally-riscv-arch-test
+IMPERASDIR	:= $(ROOT)/tests/imperas-riscv-tests
+ALLDIRS := $(ARCHDIR)/$(SUFFIX) $(WALLYDIR)/$(SUFFIX) $(IMPERASDIR)/$(SUFFIX)
+
+ELFFILES	?= $(shell find $(ALLDIRS) -type f -regex ".*\.elf")
+MEMFILES ?= $(ELFFILES:.elf=.elf.memfile)
+ADDRFILES ?= $(ELFFILES:.elf=.elf.objdump.addr)
+
+print:
+	echo "files in $(ALLDIRS) are $(ELFFILES)."
+	echo "memfiles are $(MEMFILES)"
+
+.PHONY: all wally-sim-files
+all: wally-sim-files
+
+wally-sim-files: $(MEMFILES) $(ADDRFILES)
+	echo "$@"
+
+# notes to self on how this works.
+# The find command locates all of the *.elf files in directory DIR1.  A list of .memfiles and
+# .addr files are generated from the .elf.  These are used as targets.
+# % is a wildcard in a make target which is then referenced as % in the depenecies and $*
+# in the recipe.
+# because elf2hex requires a bit width we use findstring to figure out if the compiled directory
+# is XLEN=64 or 32. This is hacky and will likely break in the future.
+# the .addr is a separate target so make can split into more jobs and more parallism.
+%.elf.memfile: %.elf
+	riscv64-unknown-elf-elf2hex --bit-width $(if $(findstring rv64,$*),64,32) --input $< --output $@
+
+%.elf.objdump.addr: %.elf.objdump
+	extractFunctionRadix.sh $<
+
+.PHONY: clean
+clean: