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