F(0)
F(1)
F(0xFF)
F(0x100)
F(0x3FC)
F(0x3FF)
F(0x7FF)
F(0x800)
F(0x801)
F(0xFFF)
F(0x1000)
F(0x1001)
F(0x7FFF)
F(0x8000)
F(0x8001)
F(0xFFF000)
F(0xFFFFFF)
F(0x1000000)
F(0x1000001)
F(-1)
F(-0xFF)
F(-0x100)
F(-0x3FC)
F(-0x3FF)
F(-0x7FF)
F(-0x800)
F(-0x801)
F(-0xFFF)
F(-0x1000)
F(-0x1001)
F(-0x7FFF)
F(-0x8000)
F(-0x8001)
F(-0xFFF000)
F(-0xFFFFFF)
F(-0x1000000)
F(-0x1000001)