DivC

Divides each element in a vector by a constant.

The function interface declaration is as follows:

Operations on floating-point numbers:
HmppResult HMPPS_DivC_32f(const float *src, float val, float *dst, int32_t len);

HmppResult HMPPS_DivC_64f(const double *src, double val, double *dst, int32_t len);

HmppResult HMPPS_DivC_32fc(const Hmpp32fc *src, Hmpp32fc val, Hmpp32fc *dst, int32_t len);

HmppResult HMPPS_DivC_64fc(const Hmpp64fc* src, Hmpp64fc val, Hmpp64fc* dst, int32_t len);
Operations on integers with scaling:
HmppResult HMPPS_DivC_8u_S(const uint8_t *src, const uint8_t val, uint8_t *dst, int32_t len, double scale);

HmppResult HMPPS_DivC_16u_S(const uint16_t *src, const uint16_t val, uint16_t *dst, int32_t len, doublescale);

HmppResult HMPPS_DivC_16s_S(const int16_t *src, int16_t val, int16_t *dst, int32_t len, double scale);

HmppResult HMPPS_DivC_16sc_S(const Hmpp16sc *src, Hmpp16sc val, Hmpp16sc *dst, int32_t len, double scale);
In-place operations on floating-point numbers:
HmppResult HMPPS_DivC_32f_I(float val, float *srcDst, int32_t len);

HmppResult HMPPS_DivC_64f_I(double val, double *srcDst, int32_t len);

HmppResult HMPPS_DivC_32fc_I(Hmpp32fc val, Hmpp32fc *srcDst, int32_t len);

HmppResult HMPPS_DivC_64fc_I(Hmpp64fc val, Hmpp64fc* srcDst, int32_t len);
In-place operations on integers with scaling:
HmppResult HMPPS_DivC_8u_IS(const uint8_t val, uint8_t *srcDst, int32_t len, double scale);

HmppResult HMPPS_DivC_16u_IS(const uint16_t val, uint16_t *srcDst, int32_t len, double scale);

HmppResult HMPPS_DivC_16sc_IS(const Hmpp16sc val, Hmpp16sc* srcDst, int32_t len, double scale);

HmppResult HMPPS_DivC_16s_IS(int16_t val, int16_t *srcDst, int32_t len, double scale);

HmppResult HMPPS_DivC_64s_IS(int64_t val, int64_t *srcDst, int32_t len, double scale);

Parameters

Parameter	Description	Value Range	Input/Output
src	Pointer to the source vector	The value cannot be NULL.	Input
val	Fixed value, divisor	The value cannot be 0.	Input
dst	Pointer to the destination vector	The value cannot be NULL.	Output
srcDst	Performs operations on the vector directly, and is used as a source vector and a destination vector.	The value cannot be NULL.	Input/Output
len	Vector length	(0, INT_MAX]	Input
scale	Scale factor	scale = 2^n, where n is an integer. The value is within (0, INF).	Input

Return Value

Success: HMPP_STS_NO_ERR
Failure: An error code is returned.

Error Codes

Error Code	Description
HMPP_STS_NULL_PTR_ERR	The value of src, dst, or srcDst is NULL.
HMPP_STS_SIZE_ERR	The value of len must be greater than 0.
HMPP_STS_DIV_BY_ZERO_ERR	The divisor is 0.
HMPP_STS_SCALE_ERR	The value of scale is not within the range (0, INF) or is NaN.

Example

#define BUFFER_SIZE_T 10
void DivCExample(void)
{
    float src[BUFFER_SIZE_T] = {10.42, 8.64, 3.22, 10.90, 10.11, 4.27, 0.53, 4.00, 4.73, -1.23};
    float dst[BUFFER_SIZE_T] = {0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00, 0.00};
    float val = 8.51;
    int32_t i, result;
    result = HMPPS_DivC_32f(src, val, dst, BUFFER_SIZE_T);
    printf("result = %d\n", result);
    if (result != HMPP_STS_NO_ERR) {
        return;
    }
    printf("dst =");
    for (i = 0; i < BUFFER_SIZE_T; i++) {
        printf(" %.2f", dst[i]);
    }
    printf("\n");
}

Output:

result = 0
dst = 1.22  1.02  0.38  1.28  1.19  0.50  0.06  0.47  0.56 -0.14

Parent topic: Basic and Common Calculations