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Abs

Calculates the absolute values of vector elements.

The function interface declaration is as follows:

  • Operations on integers:

    HmppResult HMPPS_Abs_16s(const int16_t* src, int16_t* dst, int32_t len);

    HmppResult HMPPS_Abs_32s(const int32_t* src, int32_t* dst, int32_t len);

  • Operations on floating-point numbers:

    HmppResult HMPPS_Abs_32f(const float* src, float* dst, int32_t len);

    HmppResult HMPPS_Abs_64f(const double* src, double* dst, int32_t len);

  • In-place operations on integers:

    HmppResult HMPPS_Abs_16s_I(int16_s* srcDst, int32_t len);

    HmppResult HMPPS_Abs_32s_I(int32_s* srcDst, int32_t len);

  • In-place operations on floating-point numbers:

    HmppResult HMPPS_Abs_32f_I(float* srcDst, int32_t len);

    HmppResult HMPPS_Abs_64f_I(double* srcDst, int32_t len);

Parameters

Parameter

Description

Value Range

Input/Output

src

Pointer to the source vector

The value cannot be NULL.

Input

dst

Pointer to the destination vector

The value cannot be NULL.

Output

srcDst

Pointer to the source vector for in-place operations

The value cannot be NULL.

Input/Output

len

Vector length

(0, INT_MAX]

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 is less than or equal to 0.

Example

#define BUFFER_SIZE_T 10
void AbsExample(void)
{
    float src[BUFFER_SIZE_T] = {1.64, 1.63, -1.09, 0.71, -3.20, -0.43, 0.41, -4.83, 5.36, -4.40};
    float dst[BUFFER_SIZE_T];
    (void)HMPPS_Zero_32f(dst, BUFFER_SIZE_T); //Initialize all elements of dst to 0.

    HmppResult result = HMPPS_Abs_32f(src, dst, BUFFER_SIZE_T);
    printf("result = %d\n", result);
    if (result != HMPP_STS_NO_ERR) {
        return;
    }

    printf("dst =");
    for (int i = 0; i < BUFFER_SIZE_T; i++) {
        printf(" %.2f", dst[i]);
    }
    printf("\n");
}

Output:

result = 0
dst = 1.64 1.63 1.09 0.71 3.20 0.43 0.41 4.83 5.36 4.40