{"-0X0.00008P+16", -0.5},
		{"0x0.0000000000001p-1022", math.SmallestNonzeroFloat64},
		{"0x1.fffffffffffffp1023", math.MaxFloat64},

		// underscores
		{"0_0", 0},
		{"1_000.", 1000},
		{"1_2_3.4_5_6", 123.456},
		{"1.0e0_0", 1},
		{"1p+1_0", 1024},
		{"0b_1000", 0x8},
		{"0b_1011_1101", 0xbd},
		{"0x_f0_0d_1eP+0_8", 0xf00d1e00},
	} {
		var x Float
		x.SetPrec(53)
		_, ok := x.SetString(test.s)