DSP_recip16
[Math]

Collaboration diagram for DSP_recip16:

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Detailed Description

void	DSP_recip16 (const short *restrict x, short *restrict rfrac, short *restrict rexp, short nx)

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Function Documentation

void DSP_recip16	(	const short *restrict	x,
		short *restrict	rfrac,
		short *restrict	rexp,
		short	nx
	)

This program performs a reciprocal on a vector of Q15 numbers. The result is stored in two parts: a Q15 part and an exponent (power of two) of the fraction. First, the input is loaded, then its absolute value is taken, then it is normalized, then divided using a loop of conditional subtracts, and finally it is negated if the original input was negative.

Parameters:

	x	= Input data array of shorts
	rfrac	= Output data array containing fractions
	rexp	= Output data array containing exponents
	nx	= Number of elements in the arrays

Algorithm:

DSP_recip16_cn.c is the natural C equivalent of the optimized intrinsic C code without restrictions note that the intrinsic C code is optimized and restrictions may apply.

Assumptions:

Arrays x, rfrac, and rexp do not overlap.
nx must be a multiple of 4 and greater than or equal to 4.
x must be double-word aligned.

Implementation notes:

Endian Support: The code supports both big and little endian modes.
Interruptibility: The code is interruptible.

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