Compute parity without using assembler

lte/lib/fec/src/parity.c

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2004, Phil Karn, KA9Q
+ * May be used under the terms of the GNU Lesser General Public License (LGPL)
+ */
+
+#include <stdio.h>   
+
+unsigned char Partab[256];
+int P_init;
+
+/* Create 256-entry odd-parity lookup table
+ * Needed only on non-ia32 machines
+ */
+void partab_init(void) {
+	int i, cnt, ti;
+
+	/* Initialize parity lookup table */
+	for (i = 0; i < 256; i++) {
+		cnt = 0;
+		ti = i;
+		while (ti) {
+			if (ti & 1)
+				cnt++;
+			ti >>= 1;
+		}
+		Partab[i] = cnt & 1;
+	}
+	P_init = 1;
+}