4 files changed, 49 insertions, 0 deletions
diff --git a/Makefile b/Makefile
index 240929e5..eac6df7e 100644
--- a/Makefile
+++ b/Makefile
@@ -46,6 +46,7 @@ LIB_OBJS += lib.o
 LIB_OBJS += linearize.o
 LIB_OBJS += liveness.o
 LIB_OBJS += memops.o
+LIB_OBJS += opcode.o
 LIB_OBJS += parse.o
 LIB_OBJS += pre-process.o
 LIB_OBJS += ptrlist.o
diff --git a/linearize.h b/linearize.h
index 68efd891..0a9d2547 100644
--- a/linearize.h
+++ b/linearize.h
@@ -4,6 +4,7 @@
 #include "lib.h"
 #include "allocate.h"
 #include "token.h"
+#include "opcode.h"
 #include "parse.h"
 #include "symbol.h"
 
@@ -217,6 +218,8 @@ enum opcode {
 
 	/* Needed to translate SSA back to normal form */
 	OP_COPY,
+
+	OP_LAST,			/* keep this one last! */
 };
 
 struct basic_block_list;
diff --git a/opcode.c b/opcode.c
new file mode 100644
index 00000000..0aed1ca1
--- /dev/null
+++ b/opcode.c
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2017 Luc Van Oostenryck
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "linearize.h"
+
+const struct opcode_table opcode_table[OP_LAST] = {
+	[OP_SET_EQ] = {	.negate = OP_SET_NE, },
+	[OP_SET_NE] = {	.negate = OP_SET_EQ, },
+	[OP_SET_LT] = {	.negate = OP_SET_GE, },
+	[OP_SET_LE] = {	.negate = OP_SET_GT, },
+	[OP_SET_GE] = {	.negate = OP_SET_LT, },
+	[OP_SET_GT] = {	.negate = OP_SET_LE, },
+	[OP_SET_B ] = {	.negate = OP_SET_AE, },
+	[OP_SET_BE] = {	.negate = OP_SET_A , },
+	[OP_SET_AE] = {	.negate = OP_SET_B , },
+	[OP_SET_A ] = {	.negate = OP_SET_BE, },
+};
diff --git a/opcode.h b/opcode.h
new file mode 100644
index 00000000..3a89de05
--- /dev/null
+++ b/opcode.h
@@ -0,0 +1,9 @@
+#ifndef OPCODE_H
+#define OPCODE_H
+
+
+extern const struct opcode_table {
+	int	negate:8;
+} opcode_table[];
+
+#endif