Q: Standard C doesn't do fixed point math, per se... what do I need to look for in the compiler software to be able to use fixed point math?
Q: Who has a good math library with trig functions?
A: ARM. The ARM assembler includes floating point and trig functions. See: http://infocenter.arm.com/help/topic/com.arm.doc.dui0041c/DUI0041C.pdf.\ and see: http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0041c/ch11s03s07.html.
For fixed-point math on an ARM, visit: http://infocenter.arm.com/help/topic/com.arm.doc.dai0033a/DAI0033A_fixedpoint_appsnote.pdf.
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