+/*
+#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)))
+
+const uint8_t keccak_rotate_codes[5][5] PROGMEM = {
+ { ROT_CODE( 0), ROT_CODE( 1), ROT_CODE(62), ROT_CODE(28), ROT_CODE(27) },
+ { ROT_CODE(36), ROT_CODE(44), ROT_CODE( 6), ROT_CODE(55), ROT_CODE(20) },
+ { ROT_CODE( 3), ROT_CODE(10), ROT_CODE(43), ROT_CODE(25), ROT_CODE(39) },
+ { ROT_CODE(41), ROT_CODE(45), ROT_CODE(15), ROT_CODE(21), ROT_CODE( 8) },
+ { ROT_CODE(18), ROT_CODE( 2), ROT_CODE(61), ROT_CODE(56), ROT_CODE(14) }
+};
+*/
+
+keccak_rotate_codes:
+.byte 0x00, 0x02, 0x85, 0x38, 0x36
+.byte 0x48, 0x58, 0x15, 0x73, 0x28
+.byte 0x06, 0x14, 0x56, 0x32, 0x53
+.byte 0x52, 0x67, 0x23, 0x37, 0x10
+.byte 0x24, 0x04, 0x87, 0x70, 0x25
+
+keccak_rc_comp:
+.byte 0x01, 0x92, 0xda, 0x70
+.byte 0x9b, 0x21, 0xf1, 0x59
+.byte 0x8a, 0x88, 0x39, 0x2a
+.byte 0xbb, 0xcb, 0xd9, 0x53
+.byte 0x52, 0xc0, 0x1a, 0x6a
+.byte 0xf1, 0xd0, 0x21, 0x78
+
+ .align 2