assert(i33 == -i34, "i33")
	assert(-(i35+1) == i36, "i35")
	assert(i33 == (1<<63)-1, "i33 size")

	// uint8
	var u00 uint8 = 0
	var u01 uint8 = 1
	var u02 uint8 = 255
	var u03 uint8 = +255
	assert(u01 == u00+1, "u01")
	assert(u02 == u03, "u02")
	assert(u03 == (1<<8)-1, "u03 size")

	// uint16
	var u10 uint16 = 0
	var u11 uint16 = 1
	var u12 uint16 = 65535
	var u13 uint16 = +65535

		Two129 = 1 << 129                    // 2**129 0x4800000000000000
		U00    = -1.96057090646238940668e-01 // 0xBFC91866143CBC8A
		U01    = 5.04438716639811282616e-02  // 0x3FA9D3C776292CD1
		U02    = -1.91256895875763547298e-03 // 0xBF5F55E54844F50F
		U03    = 2.35252600561610495928e-05  // 0x3EF8AB038FA6B88E
		U04    = -9.19099158039878874504e-08 // 0xBE78AC00569105B8

		Two129 = 1 << 129                    // 2**129 0x4800000000000000
		U00    = -7.38042951086872317523e-02 // 0xBFB2E4D699CBD01F
		U01    = 1.76666452509181115538e-01  // 0x3FC69D019DE9E3FC
		U02    = -1.38185671945596898896e-02 // 0xBF8C4CE8B16CFA97
		U03    = 3.47453432093683650238e-04  // 0x3F36C54D20B29B6B
		U04    = -3.81407053724364161125e-06 // 0xBECFFEA773D25CAD