Vector Absolute Value

Functions
void	zdsp_abs_f32 (const float32_t *src, float32_t *dst, uint32_t block_size)
	Floating-point vector absolute value.
void	zdsp_abs_q7 (const q7_t *src, q7_t *dst, uint32_t block_size)
	Q7 vector absolute value.
void	zdsp_abs_q15 (const q15_t *src, q15_t *dst, uint32_t block_size)
	Q15 vector absolute value.
void	zdsp_abs_q31 (const q31_t *src, q31_t *dst, uint32_t block_size)
	Q31 vector absolute value.
DSP_FUNC_SCOPE void	zdsp_abs_f16 (const float16_t *src, float16_t *dst, uint32_t block_size)
	Floating-point vector absolute value.

Detailed Description

Computes the absolute value of a vector on an element-by-element basis.

    dst[n] = abs(src[n]),   0 <= n < block_size.

The functions support in-place computation allowing the source and destination pointers to reference the same memory buffer. There are separate functions for floating-point, Q7, Q15, and Q31 data types.

Function Documentation

zdsp_abs_f16()

DSP_FUNC_SCOPE void zdsp_abs_f16	(	const float16_t *	src,
		float16_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath_f16.h>

Floating-point vector absolute value.

Parameters

[in]	src	points to the input buffer
[out]	dst	points to the output buffer
[in]	block_size	number of samples in each vector

zdsp_abs_f32()

void zdsp_abs_f32	(	const float32_t *	src,
		float32_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Floating-point vector absolute value.

Parameters

[in]	src	points to the input buffer
[out]	dst	points to the output buffer
[in]	block_size	number of samples in each vector

zdsp_abs_q15()

void zdsp_abs_q15	(	const q15_t *	src,
		q15_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Q15 vector absolute value.

Scaling and Overflow Behavior

The function uses saturating arithmetic. The Q15 value -1 (0x8000) will be saturated to the maximum allowable positive value 0x7FFF.

Parameters

[in]	src	points to the input buffer
[out]	dst	points to the output buffer
[in]	block_size	number of samples in each vector

zdsp_abs_q31()

void zdsp_abs_q31	(	const q31_t *	src,
		q31_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Q31 vector absolute value.

Scaling and Overflow Behavior

The function uses saturating arithmetic. The Q31 value -1 (0x80000000) will be saturated to the maximum allowable positive value 0x7FFFFFFF.

Parameters

[in]	src	points to the input buffer
[out]	dst	points to the output buffer
[in]	block_size	number of samples in each vector

zdsp_abs_q7()

void zdsp_abs_q7	(	const q7_t *	src,
		q7_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Q7 vector absolute value.

Scaling and Overflow Behavior

The function uses saturating arithmetic. The Q7 value -1 (0x80) will be saturated to the maximum allowable positive value 0x7F.

Parameters

[in]	src	points to the input buffer
[out]	dst	points to the output buffer
[in]	block_size	number of samples in each vector