Vector Subtraction

Functions
void	zdsp_sub_f32 (const float32_t *src_a, const float32_t *src_b, float32_t *dst, uint32_t block_size)
	Floating-point vector subtraction.
void	zdsp_sub_q7 (const q7_t *src_a, const q7_t *src_b, q7_t *dst, uint32_t block_size)
	Q7 vector subtraction.
void	zdsp_sub_q15 (const q15_t *src_a, const q15_t *src_b, q15_t *dst, uint32_t block_size)
	Q15 vector subtraction.
void	zdsp_sub_q31 (const q31_t *src_a, const q31_t *src_b, q31_t *dst, uint32_t block_size)
	Q31 vector subtraction.
DSP_FUNC_SCOPE void	zdsp_sub_f16 (const float16_t *src_a, const float16_t *src_b, float16_t *dst, uint32_t block_size)
	Floating-point vector subtraction.

Detailed Description

Element-by-element subtraction of two vectors.

    dst[n] = src_a[n] - src_b[n],   0 <= n < block_size.

There are separate functions for floating-point, Q7, Q15, and Q31 data types.

Function Documentation

zdsp_sub_f16()

DSP_FUNC_SCOPE void zdsp_sub_f16	(	const float16_t *	src_a,
		const float16_t *	src_b,
		float16_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath_f16.h>

Floating-point vector subtraction.

Parameters

[in]	src_a	points to the first input vector
[in]	src_b	points to the second input vector
[out]	dst	points to the output vector
[in]	block_size	number of samples in each vector

zdsp_sub_f32()

void zdsp_sub_f32	(	const float32_t *	src_a,
		const float32_t *	src_b,
		float32_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Floating-point vector subtraction.

Parameters

[in]	src_a	points to the first input vector
[in]	src_b	points to the second input vector
[out]	dst	points to the output vector
[in]	block_size	number of samples in each vector

zdsp_sub_q15()

void zdsp_sub_q15	(	const q15_t *	src_a,
		const q15_t *	src_b,
		q15_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Q15 vector subtraction.

Scaling and Overflow Behavior

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

Parameters

[in]	src_a	points to the first input vector
[in]	src_b	points to the second input vector
[out]	dst	points to the output vector
[in]	block_size	number of samples in each vector

zdsp_sub_q31()

void zdsp_sub_q31	(	const q31_t *	src_a,
		const q31_t *	src_b,
		q31_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Q31 vector subtraction.

Scaling and Overflow Behavior

The function uses saturating arithmetic. Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] are saturated.

Parameters

[in]	src_a	points to the first input vector
[in]	src_b	points to the second input vector
[out]	dst	points to the output vector
[in]	block_size	number of samples in each vector

zdsp_sub_q7()

void zdsp_sub_q7	(	const q7_t *	src_a,
		const q7_t *	src_b,
		q7_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Q7 vector subtraction.

Scaling and Overflow Behavior

The function uses saturating arithmetic. Results outside of the allowable Q7 range [0x80 0x7F] will be saturated.

Parameters

[in]	src_a	points to the first input vector
[in]	src_b	points to the second input vector
[out]	dst	points to the output vector
[in]	block_size	number of samples in each vector