diff --git a/modules/src/read_em/argtype b/modules/src/read_em/argtype
deleted file mode 100755
index 8d77b9bb3..000000000
--- a/modules/src/read_em/argtype
+++ /dev/null
@@ -1,15 +0,0 @@
-#!/bin/sh
-: argtype lists all em mnemonics that have an argument type equal to
-: one of the letters specified in the argument
-case x$# in
-	x2)	
-		;;
-	x*)	echo "Usage: $0 argtypes <em_table>" 1>&2
-		exit 1
-		;;
-esac
-$ED -s $2 << A
-1,/^\$/d
-1,/^\$/d
-1,/^\$/g/^\(...\)	[$1].*/s//\\1/gp
-A
diff --git a/modules/src/read_em/build.lua b/modules/src/read_em/build.lua
index 0d570416b..8acbd6d07 100644
--- a/modules/src/read_em/build.lua
+++ b/modules/src/read_em/build.lua
@@ -1,28 +1,26 @@
 normalrule {
 	name = "c_mnem_narg_h",
 	ins = {
-		"./m_C_mnem_na",
-		"util/cmisc+ed",
+		"./make_C_mnem_narg_h.lua",
+		"h/em_table_lib.lua",
 		"h/em_table",
-		"./argtype"
 	},
 	outleaves = "C_mnem_narg.h",
 	commands = {
-		"%{ins} > %{outs}"
+		"$LUA %{ins[1]} < %{ins[3]} > %{outs}"
 	}
 }
 	
 normalrule {
 	name = "c_mnem_h",
 	ins = {
-		"./m_C_mnem",
-		"util/cmisc+ed",
+		"./make_C_mnem_h.lua",
+		"h/em_table_lib.lua",
 		"h/em_table",
-		"./argtype"
 	},
 	outleaves = "C_mnem.h",
 	commands = {
-		"%{ins} > %{outs}"
+		"$LUA %{ins[1]} < %{ins[3]} > %{outs}"
 	}
 }
 	
diff --git a/modules/src/read_em/m_C_mnem b/modules/src/read_em/m_C_mnem
deleted file mode 100755
index 28588792d..000000000
--- a/modules/src/read_em/m_C_mnem
+++ /dev/null
@@ -1,95 +0,0 @@
-#!/bin/sh
-
-export ED=$1
-EM_TABLE=$2
-ARGTYPE=$3
-echo "switch(p->em_opcode) {"
-for i in - cdflnorswz p b
-do
-	list=`$ARGTYPE $i $EM_TABLE`
-	case $i in
-	-)	args='()'
-		echo "	/* no arguments */"
-		;;
-	cdflnorswz)
-		args='(p->em_cst)'
-		echo "	/* one integer constant argument */"
-		;;
-	p)
-		args='(p->em_pnam)'
-		echo "	/* a procedure name argument */"
-		;;
-	b)
-
-: Grumbl, an instruction label as argument is encoded in a sp_cst2
-
-		args='((label) (p->em_cst))'
-		echo "	/* An instruction label argument */"
-		;;
-	esac
-	for i in $list
-	do
-		cat << EOF
-	case op_$i:
-		C_$i$args;
-		break;
-EOF
-	done
-done
-list=$($ARGTYPE g $EM_TABLE | tr -d '\r')
-cat << 'EOF'
-	default:
-/* a "g" argument */
-		if (p->em_argtype == nof_ptyp) {
-			switch(p->em_opcode) {
-				default:
-					EM_error = "Illegal mnemonic";
-					break;
-EOF
-for i in $list
-do
-	cat << EOF
-				case op_$i:
-					C_${i}_dlb(p->em_dlb, p->em_off);
-					break;
-EOF
-done
-cat << 'EOF'
-			}
-		}
-		else if (p->em_argtype == sof_ptyp) {
-			switch(p->em_opcode) {
-				default:
-					EM_error = "Illegal mnemonic";
-					break;
-EOF
-for i in $list
-do
-	cat << EOF
-				case op_$i:
-					C_${i}_dnam(p->em_dnam, p->em_off);
-					break;
-EOF
-done
-cat << 'EOF'
-			}
-		}
-		else /*argtype == cst_ptyp */ {
-			switch(p->em_opcode) {
-				default:
-					EM_error = "Illegal mnemonic";
-					break;
-EOF
-for i in $list
-do
-	cat << EOF
-				case op_$i:
-					C_$i(p->em_cst);
-					break;
-EOF
-done
-cat << 'EOF'
-			}
-		}
-}
-EOF
diff --git a/modules/src/read_em/m_C_mnem_na b/modules/src/read_em/m_C_mnem_na
deleted file mode 100755
index 1d4935cc1..000000000
--- a/modules/src/read_em/m_C_mnem_na
+++ /dev/null
@@ -1,18 +0,0 @@
-#!/bin/sh
-export ED=$1
-EM_TABLE=$2
-ARGTYPE=$3
-list=$($ARGTYPE w $EM_TABLE | tr -d '\r')
-echo "switch(p->em_opcode) {"
-for i in $list
-do
-	cat << EOF
-	case op_$i:
-		C_${i}_narg();
-		break;
-EOF
-done
-cat << EOF
-	default: EM_error = "Illegal mnemonic";
-}
-EOF
diff --git a/modules/src/read_em/make_C_mnem_h.lua b/modules/src/read_em/make_C_mnem_h.lua
new file mode 100644
index 000000000..1953efbc3
--- /dev/null
+++ b/modules/src/read_em/make_C_mnem_h.lua
@@ -0,0 +1,80 @@
+require "h.em_table_lib"
+
+local specs, pseudos, mnems = load_table()
+
+local function makecase(flags, args)
+	for _, mnem in ipairs(mnems) do
+		if mnem.flags1:find(flags) then
+			print(string.format('\tcase op_%s:\n\t\tC_%s%s;\n\t\tbreak;',
+				mnem.name, mnem.name, args))
+		end
+	end
+end
+
+print("switch(p->em_opcode) {")
+
+print("\t/* no arguments */")
+makecase("^-", "()")
+
+print("\t/* one integer constant argument */")
+makecase("^[cdflnorswz]", "(p->em_cst)")
+
+print("\t/* a procedure name argument */")
+makecase("^p", "(p->em_pnam)")
+
+print("\t/* An instruction label argument */")
+makecase("^b", "((label) (p->em_cst))")
+
+print([[
+	default:
+	/* a "g" argument */
+		if (p->em_argtype == nof_ptyp) {
+			switch(p->em_opcode) {
+				default:
+					EM_error = "Illegal mnemonic";
+					break;
+]])
+for _, mnem in ipairs(mnems) do
+	if mnem.flags1:find("^g") then
+		print(string.format('\t\t\t\tcase op_%s:', mnem.name))
+		print(string.format('\t\t\t\t\tC_%s_dlb(p->em_dlb, p->em_off);\n\t\t\t\t\tbreak;',
+			mnem.name))
+	end
+end
+print([[
+			}
+		}
+		else if (p->em_argtype == sof_ptyp) {
+			switch(p->em_opcode) {
+				default:
+					EM_error = "Illegal mnemonic";
+					break;
+]])
+for _, mnem in ipairs(mnems) do
+	if mnem.flags1:find("^g") then
+		print(string.format('\t\t\t\tcase op_%s:', mnem.name))
+		print(string.format('\t\t\t\t\tC_%s_dnam(p->em_dnam, p->em_off);\n\t\t\t\t\tbreak;',
+			mnem.name))
+	end
+end
+print([[
+			}
+		}
+		else /*argtype == cst_ptyp */ {
+			switch(p->em_opcode) {
+				default:
+					EM_error = "Illegal mnemonic";
+					break;
+]])
+for _, mnem in ipairs(mnems) do
+	if mnem.flags1:find("^g") then
+		print(string.format('\t\t\t\tcase op_%s:', mnem.name))
+		print(string.format('\t\t\t\t\tC_%s(p->em_cst);\n\t\t\t\t\tbreak;',
+			mnem.name))
+	end
+end
+print([[
+			}
+		}
+}
+]])
diff --git a/modules/src/read_em/make_C_mnem_narg_h.lua b/modules/src/read_em/make_C_mnem_narg_h.lua
new file mode 100644
index 000000000..91ba7aaa4
--- /dev/null
+++ b/modules/src/read_em/make_C_mnem_narg_h.lua
@@ -0,0 +1,16 @@
+require "h.em_table_lib"
+
+local specs, pseudos, mnems = load_table()
+
+print("switch(p->em_opcode) {")
+for _, mnem in ipairs(mnems) do
+	if mnem.flags1:find("^w") then
+		print(string.format('\tcase op_%s:', mnem.name))
+		print(string.format('\t\tC_%s_narg();\n\t\tbreak;',
+			mnem.name))
+	end
+end
+print([[
+	default: EM_error = "Illegal mnemonic";
+}
+]])