Convert 16-bit floating point value

Functions
void	arm_f16_to_f64 (const float16_t *pSrc, float64_t *pDst, uint32_t blockSize)
	Converts the elements of the f16 vector to f64 vector. More...
void	arm_f16_to_float (const float16_t *pSrc, float32_t *pDst, uint32_t blockSize)
	Converts the elements of the f16 vector to f32 vector. More...
void	arm_f16_to_q15 (const float16_t *pSrc, q15_t *pDst, uint32_t blockSize)
	Converts the elements of the f16 vector to Q15 vector. More...

Description

Function Documentation

arm_f16_to_f64()

void arm_f16_to_f64	(	const float16_t *	pSrc,
		float64_t *	pDst,
		uint32_t	blockSize
	)

Converts the elements of the 16 bit floating-point vector to 64 bit floating-point vector.

Parameters

[in]	pSrc	points to the f16 input vector
[out]	pDst	points to the f64 output vector
[in]	blockSize	number of samples in each vector

Returns

none

arm_f16_to_float()

void arm_f16_to_float	(	const float16_t *	pSrc,
		float32_t *	pDst,
		uint32_t	blockSize
	)

Converts the elements of the floating-point vector to Q31 vector.

Parameters

[in]	pSrc	points to the f16 input vector
[out]	pDst	points to the f32 output vector
[in]	blockSize	number of samples in each vector

Returns

none

arm_f16_to_q15()

void arm_f16_to_q15	(	const float16_t *	pSrc,
		q15_t *	pDst,
		uint32_t	blockSize
	)

Converts the elements of the floating-point vector to Q31 vector.

Parameters

[in]	pSrc	points to the f16 input vector
[out]	pDst	points to the Q15 output vector
[in]	blockSize	number of samples in each vector

Returns

none

Details

The equation used for the conversion process is:

    pDst[n] = (q15_t)(pSrc[n] * 32768);   0 <= n < blockSize.

Scaling and Overflow Behavior

The function uses saturating arithmetic. Results outside of the allowable Q15 range [0x8000 0x7FFF] are saturated.

Note

In order to apply rounding in scalar version, the library should be rebuilt with the ROUNDING macro defined in the preprocessor section of project options.