Zephyr API Documentation  3.6.99
A Scalable Open Source RTOS
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Vector Subtraction

Element-by-element subtraction of two vectors. More...

Functions

DSP_FUNC_SCOPE void zdsp_sub_f32 (const DSP_DATA float32_t *src_a, const DSP_DATA float32_t *src_b, DSP_DATA float32_t *dst, uint32_t block_size)
 Floating-point vector subtraction.
 
DSP_FUNC_SCOPE void zdsp_sub_q7 (const DSP_DATA q7_t *src_a, const DSP_DATA q7_t *src_b, DSP_DATA q7_t *dst, uint32_t block_size)
 Q7 vector subtraction.
 
DSP_FUNC_SCOPE void zdsp_sub_q15 (const DSP_DATA q15_t *src_a, const DSP_DATA q15_t *src_b, DSP_DATA q15_t *dst, uint32_t block_size)
 Q15 vector subtraction.
 
DSP_FUNC_SCOPE void zdsp_sub_q31 (const DSP_DATA q31_t *src_a, const DSP_DATA q31_t *src_b, DSP_DATA 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_apoints to the first input vector
[in]src_bpoints to the second input vector
[out]dstpoints to the output vector
[in]block_sizenumber of samples in each vector

◆ zdsp_sub_f32()

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

#include <zephyr/dsp/basicmath.h>

Floating-point vector subtraction.

Parameters
[in]src_apoints to the first input vector
[in]src_bpoints to the second input vector
[out]dstpoints to the output vector
[in]block_sizenumber of samples in each vector

◆ zdsp_sub_q15()

DSP_FUNC_SCOPE void zdsp_sub_q15 ( const DSP_DATA q15_t src_a,
const DSP_DATA q15_t src_b,
DSP_DATA 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_apoints to the first input vector
[in]src_bpoints to the second input vector
[out]dstpoints to the output vector
[in]block_sizenumber of samples in each vector

◆ zdsp_sub_q31()

DSP_FUNC_SCOPE void zdsp_sub_q31 ( const DSP_DATA q31_t src_a,
const DSP_DATA q31_t src_b,
DSP_DATA 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_apoints to the first input vector
[in]src_bpoints to the second input vector
[out]dstpoints to the output vector
[in]block_sizenumber of samples in each vector

◆ zdsp_sub_q7()

DSP_FUNC_SCOPE void zdsp_sub_q7 ( const DSP_DATA q7_t src_a,
const DSP_DATA q7_t src_b,
DSP_DATA 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_apoints to the first input vector
[in]src_bpoints to the second input vector
[out]dstpoints to the output vector
[in]block_sizenumber of samples in each vector