diff --git a/modules/src/em_code/build.lua b/modules/src/em_code/build.lua
index b65ce83ca..37392d425 100644
--- a/modules/src/em_code/build.lua
+++ b/modules/src/em_code/build.lua
@@ -1,15 +1,15 @@
 normalrule {
 	name = "em_code_ek_h",
 	ins = {
-		"./make.em.gen",
-		"util/cmisc+ed",
+		"./make_codeek_h.lua",
+		"h/em_table_lib.lua",
+		"h/em_table",
 		"./em.nogen",
-		"h/em_table"
 	},
 	outleaves = { "em_codeEK.h" },
 	commands = {
-		"%{ins[1]} %{ins[2]} %{ins[4]} > %{outs}",
-		"cat %{ins[3]} >> %{outs}"
+		"$LUA %{ins[1]} < %{ins[3]} > %{outs}",
+		"cat %{ins[4]} >> %{outs}"
 	}
 }
 
diff --git a/modules/src/em_code/make.em.gen b/modules/src/em_code/make.em.gen
deleted file mode 100755
index d37d45638..000000000
--- a/modules/src/em_code/make.em.gen
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/sh
-echo "/* this part is generated from $2 at: " `date` "*/"
-$1 -s $2 <<'EOI' 
-1,/^$/d
-1,/^$/d
-1,$s/^\(...\)	\(.\).*/\1:\2/
-g/:d/s/^\(...\):\(.\).*/#define C_\1(c) CC_opcst(op_\1, c)/
-g/:[cslnfzor]/s/^\(...\):\(.\).*/#define C_\1(c) CC_opcst(op_\1, c)/
-g/:w/s/^\(...\).*/#define C_\1(w) CC_opcst(op_\1, w)\
-#define C_\1_narg() CC_opnarg(op_\1)/
-g/:g/s/^\(...\).*/#define C_\1(g) CC_opcst(op_\1, g)\
-#define C_\1_dnam(g, o) CC_opdnam(op_\1, g, o)\
-#define C_\1_dlb(g, o) CC_opdlb(op_\1, g, o)/
-g/:p/s/^\(...\).*/#define C_\1(p) CC_oppnam(op_\1, p)/
-g/:b/s/^\(...\).*/#define C_\1(b) CC_opilb(op_\1, b)/
-g/:-/s/^\(...\).*/#define C_\1() CC_op(op_\1)/
-1,$p
-EOI
diff --git a/modules/src/em_code/make.sh b/modules/src/em_code/make.sh
deleted file mode 100755
index 9ee7d44eb..000000000
--- a/modules/src/em_code/make.sh
+++ /dev/null
@@ -1,20 +0,0 @@
-list=
-target=$1
-shift
-for i
-do
-	echo "+$cc $cflags $i"
-	if $cc $cflags $i
-	then
-		list="$list `basename $i .c`.$suf"
-	else
-		exit 1
-	fi
-done
-echo "+$ar r libem$target.$libsuf $list"
-if $ar r libem$target.$libsuf $list
-then
-	:
-else
-	exit 1
-fi
diff --git a/modules/src/em_code/make_codeek_h.lua b/modules/src/em_code/make_codeek_h.lua
new file mode 100644
index 000000000..2ebf46761
--- /dev/null
+++ b/modules/src/em_code/make_codeek_h.lua
@@ -0,0 +1,25 @@
+require "h.em_table_lib"
+
+local specs, pseudos, mnems = load_table()
+
+for _, mnem in ipairs(mnems) do
+	if mnem.flags1:find("^[cslndfzor]") then
+		print(string.format("#define C_%s(c) CC_opcst(op_%s, c)", mnem.name, mnem.name))
+	elseif mnem.flags1:find("^w") then
+		print(string.format("#define C_%s(w) CC_opcst(op_%s, w)", mnem.name, mnem.name))
+		print(string.format("#define C_%s_narg() CC_opnarg(op_%s)", mnem.name, mnem.name))
+	elseif mnem.flags1:find("^g") then
+		print(string.format("#define C_%s(g) CC_opcst(op_%s, g)", mnem.name, mnem.name))
+		print(string.format("#define C_%s_dnam(g, o) CC_opdnam(op_%s, g, o)", mnem.name, mnem.name))
+		print(string.format("#define C_%s_dlb(g, o) CC_opdlb(op_%s, g, o)", mnem.name, mnem.name))
+	elseif mnem.flags1:find("^p") then
+		print(string.format("#define C_%s(p) CC_oppnam(op_%s, p)", mnem.name, mnem.name))
+	elseif mnem.flags1:find("^b") then
+		print(string.format("#define C_%s(b) CC_opilb(op_%s, b)", mnem.name, mnem.name))
+	elseif mnem.flags1:find("^-") then
+		print(string.format("#define C_%s() CC_op(op_%s)", mnem.name, mnem.name))
+	else
+		error("unsupport em_table flag")
+	end
+end
+
diff --git a/modules/src/em_code/makeem.sed b/modules/src/em_code/makeem.sed
deleted file mode 100644
index 8db5d8cc9..000000000
--- a/modules/src/em_code/makeem.sed
+++ /dev/null
@@ -1,18 +0,0 @@
-1i\
-/* this part is generated from em_table */
-# Remove pseudo instructions
-/^\(...\)	\([0-9]\).*/d
-# Remove opcode constant categories/count
-/^\(....\)	\([0-9]\).*/d
-/^\(.....\)	\([0-9]\).*/d
-# Below are the actual replacement of opcodes.
-s/^\(...\)	\(d\).*/#define C_\1(c) CC_opcst(op_\1, c)/
-s/^\(...\)	\([cslnfzor]\).*/#define C_\1(c) CC_opcst(op_\1, c)/
-s/^\(...\)	\(w\).*/#define C_\1(w) CC_opcst(op_\1, w)\
-#define C_\1_narg() CC_opnarg(op_\1)/
-s/^\(...\)	\(g\).*/#define C_\1(g) CC_opcst(op_\1, g)\
-#define C_\1_dnam(g, o) CC_opdnam(op_\1, g, o)\
-#define C_\1_dlb(g, o) CC_opdlb(op_\1, g, o)/
-s/^\(...\)	\(p\).*/#define C_\1(p) CC_oppnam(op_\1, p)/
-s/^\(...\)	\(b\).*/#define C_\1(b) CC_opilb(op_\1, b)/
-s/^\(...\)	\(-\).*/#define C_\1() CC_op(op_\1)/