diff lwcc/cc-gencode.c @ 499:c3099c5d9d3e

Add very simple code generator This very simple code generator is definitely not the final form. It is simply a stop-gap for ongoing development.
author William Astle <lost@l-w.ca>
date Thu, 08 Aug 2019 23:48:18 -0600
parents
children f3e9732973f1
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lwcc/cc-gencode.c	Thu Aug 08 23:48:18 2019 -0600
@@ -0,0 +1,51 @@
+/*
+lwcc/cc-gencode.c
+
+Copyright © 2019 William Astle
+
+This file is part of LWTOOLS.
+
+LWTOOLS is free software: you can redistribute it and/or modify it under the
+terms of the GNU General Public License as published by the Free Software
+Foundation, either version 3 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+more details.
+
+You should have received a copy of the GNU General Public License along with
+this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <stdio.h>
+#include <string.h>
+
+#include <lw_alloc.h>
+#include <lw_string.h>
+
+#include "tree.h"
+
+void generate_code(node_t *n, FILE *output)
+{
+    node_t *nn;
+    switch (n -> type)
+    {
+    // function definition - output prologue, then statements, then epilogue
+    case NODE_FUNDEF:
+        fprintf(output, "_%s\n", n->children->next_child->strval);
+        generate_code(n->children->next_child->next_child->next_child, output);
+        fprintf(output, "\trts\n");
+        break;
+    
+    case NODE_CONST_INT:
+        fprintf(output, "\tldd #%s\n", n->strval);
+        break;
+
+    default:
+        for (nn = n -> children; nn; nn = nn -> next_child)
+            generate_code(nn, output);
+        break;
+    }
+}