v?asinpi
Interface Definition
C interface:
void vsasinpi(const int len, const float* src, float* dst);
void vdasinpi(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 arcsine of x divided by π, that is, y = asin(x)/π. y ∈ [-0.5, +0.5]
- For special values, see the following table.
Input Value (src)
Output Value (dst)
1
0.5
-1
-0.5
|x| > 1
nan
±inf
nan
nan
nan
Dependency
C: "kvml.h"
Example
C interface:
int i, len = 8;
float src[8] = {-1.0f, -0.5f, 0.0f, 0.5f, 1.0f, 2.0f, INFINITY, NAN};
float* dst = (float*)malloc(sizeof(float) * len);
if (dst == NULL) {
printf("Malloc Failed!\n");
return 0;
}
vsasinpi(len, src, dst);
/**
* Output dst:
* -0.500000 -0.166667 0.000000 0.166667 0.500000 nan nan nan
*/
Parent topic: Function Syntax