Vector Negate

Negates the elements of a vector. More...

Functions
DSP_FUNC_SCOPE void	zdsp_negate_f32 (const DSP_DATA float32_t *src, DSP_DATA float32_t *dst, uint32_t block_size)
	Negates the elements of a floating-point vector.
DSP_FUNC_SCOPE void	zdsp_negate_q7 (const DSP_DATA q7_t *src, DSP_DATA q7_t *dst, uint32_t block_size)
	Negates the elements of a Q7 vector.
DSP_FUNC_SCOPE void	zdsp_negate_q15 (const DSP_DATA q15_t *src, DSP_DATA q15_t *dst, uint32_t block_size)
	Negates the elements of a Q15 vector.
DSP_FUNC_SCOPE void	zdsp_negate_q31 (const DSP_DATA q31_t *src, DSP_DATA q31_t *dst, uint32_t block_size)
	Negates the elements of a Q31 vector.
void	zdsp_negate_f16 (const float16_t *src, float16_t *dst, uint32_t block_size)
	Negates the elements of a floating-point vector.

Detailed Description

Negates the elements of a vector.

    dst[n] = -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_negate_f16()

void zdsp_negate_f16	(	const float16_t *	src,
		float16_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath_f16.h>

Negates the elements of a floating-point vector.

Parameters

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

zdsp_negate_f32()

DSP_FUNC_SCOPE void zdsp_negate_f32	(	const DSP_DATA float32_t *	src,
		DSP_DATA float32_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Negates the elements of a floating-point vector.

Parameters

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

zdsp_negate_q15()

DSP_FUNC_SCOPE void zdsp_negate_q15	(	const DSP_DATA q15_t *	src,
		DSP_DATA q15_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Negates the elements of a Q15 vector.

Scaling and Overflow Behavior

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

Parameters

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

zdsp_negate_q31()

DSP_FUNC_SCOPE void zdsp_negate_q31	(	const DSP_DATA q31_t *	src,
		DSP_DATA q31_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Negates the elements of a Q31 vector.

Scaling and Overflow Behavior

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

Parameters

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

zdsp_negate_q7()

DSP_FUNC_SCOPE void zdsp_negate_q7	(	const DSP_DATA q7_t *	src,
		DSP_DATA q7_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Negates the elements of a Q7 vector.

Scaling and Overflow Behavior

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

Parameters

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