v?exp2

Compute the element-wise base-2 exponential of a vector.

Interface Definition

C interface:

void vsexp2(const int len, const float* src, float* dst);

void vdexp2(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, an invalid parameter error is reported and the function returns.	Input
src	Single-precision floating-point type for vsexp2 Double-precision floating-point type for vdexp2	Input vector src with length len. If the pointer is null, a null pointer error is reported and the function returns.	Input
dst	Single-precision floating-point type for vsexp2 Double-precision floating-point type for vdexp2	Output vector dst with length len. If the pointer is null, a null pointer error is reported and the function returns.	Output

Parameter

Type

Description

Input/Output

len

Integer

Number of elements in the input vector.

If len ≤ 0, an invalid parameter error is reported and the function returns.

Input

src

Single-precision floating-point type for vsexp2
Double-precision floating-point type for vdexp2

Input vector src with length len.

If the pointer is null, a null pointer error is reported and the function returns.

Input

dst

Single-precision floating-point type for vsexp2
Double-precision floating-point type for vdexp2

Output vector dst with length len.

If the pointer is null, a null pointer error is reported and the function returns.

Output

Return Value

Return the result of . For special values, see the following table.

Input Value (src)	Output Value (dst)
+0	+1
-0	+1
inf	inf
-inf	+0
nan	nan

Dependencies

C: "kvml.h"

Examples

C interface:

      
               #define N 4
    const float src[N] = {-2.2f, 1.0f, +INFINITY, -0.0f};
    float dst[N] = {0};

    vsexp2(N, src, dst);
    printFArr("input :", N, src);
    printFArr("output:", N, dst);

    /** 
     *  input :  -2.200    1.000      inf   -0.000 
     *  output:   0.218    2.000      inf    1.000 
     * 
     */

Parent topic: Function Syntax