dsps_dotprod.h File Reference

#include "esp_log.h"
#include "dsp_err.h"
#include "dsps_dotprod_platform.h"

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Macros
#define	dsps_dotprod_s16   dsps_dotprod_s16_ansi
#define	dsps_dotprod_f32   dsps_dotprod_f32_ansi
#define	dsps_dotprode_f32   dsps_dotprode_f32_ansi

Functions
esp_err_t	dsps_dotprod_s16_ansi (const int16_t *src1, const int16_t *src2, int16_t *dest, int len, int8_t shift)
	dot product of two 16 bit vectors Dot product calculation for two signed 16 bit arrays: *dest += (src1[i] * src2[i]) >> (15-shift); i= [0..N) The extension (_ansi) use ANSI C and could be compiled and run on any platform. The extension (_ae32) is optimized for ESP32 chip.
esp_err_t	dsps_dotprod_s16_ae32 (const int16_t *src1, const int16_t *src2, int16_t *dest, int len, int8_t shift)
esp_err_t	dsps_dotprod_s16_arp4 (const int16_t *src1, const int16_t *src2, int16_t *dest, int len, int8_t shift)
esp_err_t	dsps_dotprod_f32_ansi (const float *src1, const float *src2, float *dest, int len)
	dot product of two float vectors Dot product calculation for two floating point arrays: *dest += (src1[i] * src2[i]); i= [0..N) The extension (_ansi) use ANSI C and could be compiled and run on any platform. The extension (_ae32) is optimized for ESP32 chip.
esp_err_t	dsps_dotprod_f32_ae32 (const float *src1, const float *src2, float *dest, int len)
esp_err_t	dsps_dotprod_f32_aes3 (const float *src1, const float *src2, float *dest, int len)
esp_err_t	dsps_dotprod_f32_arp4 (const float *src1, const float *src2, float *dest, int len)
esp_err_t	dsps_dotprode_f32_ansi (const float *src1, const float *src2, float *dest, int len, int step1, int step2)
	dot product of two float vectors with step Dot product calculation for two floating point arrays: *dest += (src1[i*step1] * src2[i*step2]); i= [0..N) The extension (_ansi) use ANSI C and could be compiled and run on any platform. The extension (_ae32) is optimized for ESP32 chip.
esp_err_t	dsps_dotprode_f32_ae32 (const float *src1, const float *src2, float *dest, int len, int step1, int step2)
esp_err_t	dsps_dotprode_f32_arp4 (const float *src1, const float *src2, float *dest, int len, int step1, int step2)

Macro Definition Documentation

dsps_dotprod_f32

#define dsps_dotprod_f32   dsps_dotprod_f32_ansi

Definition at line 124 of file dsps_dotprod.h.

dsps_dotprod_s16

#define dsps_dotprod_s16   dsps_dotprod_s16_ansi

Definition at line 123 of file dsps_dotprod.h.

dsps_dotprode_f32

#define dsps_dotprode_f32   dsps_dotprode_f32_ansi

Definition at line 125 of file dsps_dotprod.h.

Function Documentation

dsps_dotprod_f32_ae32()

esp_err_t dsps_dotprod_f32_ae32	(	const float *	src1,
		const float *	src2,
		float *	dest,
		int	len )

dsps_dotprod_f32_aes3()

esp_err_t dsps_dotprod_f32_aes3	(	const float *	src1,
		const float *	src2,
		float *	dest,
		int	len )

dsps_dotprod_f32_ansi()

esp_err_t dsps_dotprod_f32_ansi	(	const float *	src1,
		const float *	src2,
		float *	dest,
		int	len )

dot product of two float vectors Dot product calculation for two floating point arrays: *dest += (src1[i] * src2[i]); i= [0..N) The extension (_ansi) use ANSI C and could be compiled and run on any platform. The extension (_ae32) is optimized for ESP32 chip.

Parameters

[in]	src1	source array 1
[in]	src2	source array 2
	dest	destination pointer
[in]	len	length of input arrays

Returns

• ESP_OK on success
• One of the error codes from DSP library

Definition at line 17 of file dsps_dotprod_f32_ansi.c.

{
    float acc = 0;
    for (int i = 0 ; i < len ; i++) {
        acc += src1[i] * src2[i];
    }
    *dest = acc;
    return ESP_OK;
}

References ESP_OK.

dsps_dotprod_f32_arp4()

esp_err_t dsps_dotprod_f32_arp4	(	const float *	src1,
		const float *	src2,
		float *	dest,
		int	len )

dsps_dotprod_s16_ae32()

esp_err_t dsps_dotprod_s16_ae32	(	const int16_t *	src1,
		const int16_t *	src2,
		int16_t *	dest,
		int	len,
		int8_t	shift )

dsps_dotprod_s16_ansi()

esp_err_t dsps_dotprod_s16_ansi	(	const int16_t *	src1,
		const int16_t *	src2,
		int16_t *	dest,
		int	len,
		int8_t	shift )

dot product of two 16 bit vectors Dot product calculation for two signed 16 bit arrays: *dest += (src1[i] * src2[i]) >> (15-shift); i= [0..N) The extension (_ansi) use ANSI C and could be compiled and run on any platform. The extension (_ae32) is optimized for ESP32 chip.

Parameters

[in]	src1	source array 1
[in]	src2	source array 2
	dest	destination pointer
[in]	len	length of input arrays
[in]	shift	shift of the result.

Returns

• ESP_OK on success
• One of the error codes from DSP library

Definition at line 17 of file dsps_dotprod_s16_ansi.c.

{
    // To make correct round operation we have to shift round value
    long long acc = 0x7fff >> shift;
 
    for (int i = 0 ; i < len ; i++) {
        acc += (int32_t)src1[i] * (int32_t)src2[i];
    }
 
    int final_shift = shift - 15;
    if (final_shift > 0) {
        *dest = (acc << final_shift);
    } else {
        *dest = (acc >> (-final_shift));
    }
    return ESP_OK;
}

References ESP_OK.

dsps_dotprod_s16_arp4()

esp_err_t dsps_dotprod_s16_arp4	(	const int16_t *	src1,
		const int16_t *	src2,
		int16_t *	dest,
		int	len,
		int8_t	shift )

dsps_dotprode_f32_ae32()

esp_err_t dsps_dotprode_f32_ae32	(	const float *	src1,
		const float *	src2,
		float *	dest,
		int	len,
		int	step1,
		int	step2 )

dsps_dotprode_f32_ansi()

esp_err_t dsps_dotprode_f32_ansi	(	const float *	src1,
		const float *	src2,
		float *	dest,
		int	len,
		int	step1,
		int	step2 )

dot product of two float vectors with step Dot product calculation for two floating point arrays: *dest += (src1[i*step1] * src2[i*step2]); i= [0..N) The extension (_ansi) use ANSI C and could be compiled and run on any platform. The extension (_ae32) is optimized for ESP32 chip.

Parameters

[in]	src1	source array 1
[in]	src2	source array 2
	dest	destination pointer
[in]	len	length of input arrays
[in]	step1	step over elements in first array
[in]	step2	step over elements in second array

Returns

• ESP_OK on success
• One of the error codes from DSP library

Definition at line 17 of file dsps_dotprode_f32_ansi.c.

{
    float acc = 0;
    for (int i = 0 ; i < len ; i++) {
        acc += src1[i * step1] * src2[i * step2];
    }
    *dest = acc;
    return ESP_OK;
}

References ESP_OK.

dsps_dotprode_f32_arp4()

esp_err_t dsps_dotprode_f32_arp4	(	const float *	src1,
		const float *	src2,
		float *	dest,
		int	len,
		int	step1,
		int	step2 )