This directive selects the type of coprocessor used to do floating point calculations. The directive must be followed by the type of floating point unit. The allowed values depend on the target CPU:
all
SOFT: FPC emulates the coprocessor (not yet implemented).
i386
X87, SSE, SSE2: code compiled with SSE uses the sse to do calculations involving a float of type Single. This code runs only on Pentium III and above, or AthlonXP and above. Code compiled with SSE2 uses the sse unit to do calculations with the single and double data type. This code runs only on PentiumIV and above or Athlon64 and above
x86-64
SSE64
powerpc
STANDARD
arm
LIBGCC, FPA, FPA10, FPA11,VFP.
This directive corresponds to the -Cf command line option.