v?acospi
Interface Definition
C interface:
void vsacospi(const int len, const float* src, float* dst);
void vdacospi(const int len, const double* src, double* dst);
Parameters
Parameter |
Type |
Description |
Input/Output |
|---|---|---|---|
len |
Integer |
Number of elements in the input vector. If len ≤ 0, the system displays a message indicating that the value of len is invalid. |
Input |
src |
|
Input vector src with length len. If the pointer is null, the system prompts a null pointer error. |
Input |
dst |
|
Output vector dst with length len. If the pointer is null, the system prompts a null pointer error. |
Output |
Return Value
- Each operation value returns the arccosine of x divided by π, that is, y = acos(x)/π. y ∈ [0, 1]
- For special values, see the following table.
Input Value (src)
Output Value (dst)
1
0
-1
1.0
|x| > 1
nan
±inf
nan
nan
nan
Dependency
C: "kvml.h"
Example
C interface:
int i, len = 4;
float src[4] = {0.0f, 2.0f, INFINITY, NAN};
float* dst = (float*)malloc(sizeof(float) * len);
if (dst == NULL) {
printf("Malloc Failed!\n");
return 0;
}
vsacospi(len, src, dst);
printf("\n");
/**
* Output dst:
* 0.500000 nan nan -nan
*/
Parent topic: Function Syntax