PIC Microcontroller Math Method

IEEE<>Microchip format conversion

From Microchip Application Note AN575:

;IEEE to MCHIP format conversion
	rl	AARGB0	;IEEE -> Microchip
	rl	AEXP
	rr	AARGB0

;MCHIP to IEEE format conversion
	rl	AARGB0	;IEEE <- MICROCHIP
	rr	AEXP
	rr	AARGB0

Format	8-bit biased exponent (exponent + 127)	Mantissa
	AEXP	AARGB0(MSB)	AARGB1	AARGB2
IEEE754 32-bit	sxxx xxxx	y.xxx xxxx	xxxx xxxx	xxxx xxxx
Microchip 32-bit	xxxx xxxy	s.xxx xxxx	xxxx xxxx	xxxx xxxx
Microchip 24-bit	xxxx xxxy	s.xxx xxxx	xxxx xxxx	n/a

s - sign bit of mantissa

y - least significant bit of biased exponent