Compiler Option: -fpu

Sets the math unit to be used for floating point arithmetic.

Syntax
	-fpu < type >

Parameters
	type
		The floating point unit: X87 | SSE | NEON.

Description
	The -fpu compiler option sets the math unit to be used for floating 
	point arithmetic.  If this option is not specified, the default is -fpu 
	X87.

	-fpu X87 will generate floating point instructions for the 387.

	-fpu SSE will generate floating point instructions for SSE and SSE2 with 
	some math support still done by the 387.

	-fpu NEON will generate floating point instructions for ARMv7-A Advanced 
	SIMD (Neon) extension.  Specifying this option will automatically set 
	the arch to at least armv7-a if not already set to a later processor.

	Functions normally return a floating point value (KeyPgSingleSingle or KeyPgDoubleDouble) in 
	the st(0) register.  Sometimes, this may be optimized by returning the 
	value in the xmm0 register instead.  This can be specified with 
	KeyPgOptionOption("Sse") after the return type in a function's declaration or 
	definition.  KeyPgOptionOption("Sse") is ignored unless the source is compiled with 
	the -fpu SSE command line option.

Version
	* -fpu NEON added in fbc-1.20.0

See also
	* CompilerCmdLineUsing the Command Line
	* KeyPgOptionOption()
	* KeyPgDdfbfpu__FB_FPU__

