+const static uint8_t rc_comp[] PROGMEM = {
+ 0x01, 0x92, 0xda, 0x70,
+ 0x9b, 0x21, 0xf1, 0x59,
+ 0x8a, 0x88, 0x39, 0x2a,
+ 0xbb, 0xcb, 0xd9, 0x53,
+ 0x52, 0xc0, 0x1a, 0x6a,
+ 0xf1, 0xd0, 0x21, 0x78,
+};
+
+#define RP_IDX(i, j) ((((2 * j + 3 * i) % 5) * 5 + i) * 8)
+
+uint8_t const rho_pi_idx_table[5][5] PROGMEM = {
+ { RP_IDX(0, 0), RP_IDX(0, 1), RP_IDX(0, 2), RP_IDX(0, 3), RP_IDX(0, 4) },
+ { RP_IDX(1, 0), RP_IDX(1, 1), RP_IDX(1, 2), RP_IDX(1, 3), RP_IDX(1, 4) },
+ { RP_IDX(2, 0), RP_IDX(2, 1), RP_IDX(2, 2), RP_IDX(2, 3), RP_IDX(2, 4) },
+ { RP_IDX(3, 0), RP_IDX(3, 1), RP_IDX(3, 2), RP_IDX(3, 3), RP_IDX(3, 4) },
+ { RP_IDX(4, 0), RP_IDX(4, 1), RP_IDX(4, 2), RP_IDX(4, 3), RP_IDX(4, 4) }
+};
+
+#define ROT_BIT(a) (( (a) <= 4) ? ((a) << 1) : (0x01 | ((8 - (a)) << 1)))
+#define ROT_CODE(a) ((((a) / 8 + ((((a) % 8) > 4) ? 1 : 0)) << 4) | ROT_BIT(((a) % 8)))