There is none. The StrongARM unlike the Intel x86 series of CPU's has no integrated floating point hardware. ARM manufactures a coprocessor floating point unit; the FPA11, however it is only available on the ARM 7500FE and it is not compatible with the Intel StrongARM chips. Hence the Netwinder has no floating point hardware at all. It depends entirely on software that emulates the FPA11 floating point unit.