-threefish1024_rc0: .byte 0x79, 0x31, 0x41, 0x42, 0x34, 0x21, 0x72, 0x69
-threefish1024_rc1: .byte 0x53, 0x31, 0x10, 0x53, 0x19, 0x1a, 0x19, 0x61
-threefish1024_rc2: .byte 0x5b, 0x6a, 0x22, 0x31, 0x69, 0x22, 0x40, 0x33
-threefish1024_rc3: .byte 0x50, 0x2b, 0x71, 0x74, 0x60, 0x31, 0x6b, 0x72
-threefish1024_rc4: .byte 0x20, 0x2a, 0x3b, 0x54, 0x63, 0x53, 0x23, 0x5b
-threefish1024_rc5: .byte 0x3a, 0x2b, 0x14, 0x11, 0x11, 0x52, 0x22, 0x60
-threefish1024_rc6: .byte 0x5a, 0x64, 0x40, 0x73, 0x43, 0x50, 0x02, 0x7b
-threefish1024_rc7: .byte 0x14, 0x71, 0x7a, 0x42, 0x51, 0x29, 0x70, 0x70
+/* old round constants
+threefish1024_rc0: .byte 0x79, 0x31, 0x41, 0x42, 0x34, 0x21, 0x72, 0x69
+threefish1024_rc1: .byte 0x53, 0x31, 0x10, 0x53, 0x19, 0x1a, 0x19, 0x61
+threefish1024_rc2: .byte 0x5b, 0x6a, 0x22, 0x31, 0x69, 0x22, 0x40, 0x33
+threefish1024_rc3: .byte 0x50, 0x2b, 0x71, 0x74, 0x60, 0x31, 0x6b, 0x72
+threefish1024_rc4: .byte 0x20, 0x2a, 0x3b, 0x54, 0x63, 0x53, 0x23, 0x5b
+threefish1024_rc5: .byte 0x3a, 0x2b, 0x14, 0x11, 0x11, 0x52, 0x22, 0x60
+threefish1024_rc6: .byte 0x5a, 0x64, 0x40, 0x73, 0x43, 0x50, 0x02, 0x7b
+threefish1024_rc7: .byte 0x14, 0x71, 0x7a, 0x42, 0x51, 0x29, 0x70, 0x70
+*/
+threefish1024_rc0: .byte 0x30, 0x5a, 0x41, 0x1b, 0x51, 0x20, 0x49, 0x11
+threefish1024_rc1: .byte 0x2b, 0x23, 0x04, 0x24, 0x11, 0x42, 0x54, 0x60
+threefish1024_rc2: .byte 0x10, 0x12, 0x63, 0x60, 0x5b, 0x70, 0x69, 0x43
+threefish1024_rc3: .byte 0x69, 0x79, 0x2b, 0x51, 0x49, 0x63, 0x6a, 0x64
+threefish1024_rc4: .byte 0x10, 0x61, 0x42, 0x69, 0x14, 0x04, 0x23, 0x39
+threefish1024_rc5: .byte 0x21, 0x22, 0x51, 0x34, 0x69, 0x7b, 0x52, 0x49
+threefish1024_rc6: .byte 0x3a, 0x39, 0x73, 0x20, 0x54, 0x52, 0x54, 0x5b
+threefish1024_rc7: .byte 0x5b, 0x64, 0x21, 0x31, 0x4a, 0x51, 0x31, 0x24