v?expm1
Subtract 1 from the base-e exponential of an input vector.
Interface Definition
C interface:
void vsexpm1(const int len, const float* src, float* dst);
void vdexpm1(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
Return the result of 
. For special values, see the following table.
Input Value (src) |
Output Value (dst) |
|---|---|
+0 |
+0 |
-0 |
-0 |
>overflow |
+inf |
inf |
inf |
-inf |
-1 |
nan |
nan |
Dependency
C: "kvml.h"
Examples
C interface:
int i, len = 4;
float src[len] = {0.0f, INFINITY, NAN, 2.0f};
float* dst = (float*)malloc(sizeof(float) * len);
if (dst == NULL) {
printf("Malloc Failed!\n");
return 0;
}
vsexpm1(len, src, dst);
/**
* Output dst:
* -1.0 inf nan 6.38905609893065
*
*/
Parent topic: Function Syntax