1 files changed, 24 insertions, 0 deletions
diff --git a/src/cortexelf-v1/ao_flip_bits.5c b/src/cortexelf-v1/ao_flip_bits.5c
new file mode 100644
index 00000000..cd5507cc
--- /dev/null
+++ b/src/cortexelf-v1/ao_flip_bits.5c
@@ -0,0 +1,24 @@
+#!/usr/bin/nickle
+
+int flip_bits(int a, int n)
+{
+	int result = 0;
+	for (int pos = 0; pos < n; pos++)
+		if ((a & (1 << pos)) != 0)
+			result |= (1 << (n - 1 - pos));
+	return result;
+}
+
+void print_flip_bits(string name, int n) {
+	printf ("static const uint8_t %s_%d[%d] = {\n", name, n, 1 << n);
+
+	for (int i = 0; i < 1 << n; i++) {
+		printf (" 0x%02x,", flip_bits(i, n));
+		if ((i & 0xf) == 0xf)
+			printf("\n");
+	}
+	printf("};\n");
+}
+
+print_flip_bits("ao_flip_bits", 8);
+print_flip_bits("ao_flip_bits", 2);