Floating-point architectures (continued)
Entirely in hardware (Compaq/DEC Alpha 21264, IBM S/390 and Power, Intel x86 and IA-64, Motorola 68K and 88K , Sun UltraSPARC III (check??))
Partly in hardware , plus software for complicated parts (Compaq/DEC Alpha, HP PA-RISC, SGI/MIPS, Sun SPARC); software may be set at compile time, or at run time