v?maxmag

Return the one with a larger magnitude in x and y, where x and y are vector arrays.

Interface Definition

C interface:

void vsmaxmag(const int len, const float* src1, const float* src2, float* dst);

void vdmaxmag(const int len, const double* src1, const double* src2, 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
src1	Single-precision floating-point type for vsmaxmag Double-precision floating-point type for vdmaxmag	Input vector src1 with length len. If the pointer is null, a null pointer error is reported and the function returns.	Input
src2	Single-precision floating-point type for vsmaxmag Double-precision floating-point type for vdmaxmag	Input vector src2 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 vsmaxmag Double-precision floating-point type for vdmaxmag	Output vector dst with length len. If the pointer is null, a null pointer error is reported and the function returns.	Output

Return Value

The return value conforms to the following rules:
If |x| > |y|, x is returned; otherwise, y is returned.

If |x| < |y|, y is returned; otherwise, x is returned.

Otherwise, fmax(x, y) is returned.
For special values, see the following table.
Input Value 1 (src1)

Input Value 2 (src2)

Output Value (dst)

!= nan

nan

x

nan

!= nan

y

nan

nan

nan

Input Value 1 (src1)	Input Value 2 (src2)	Output Value (dst)
!= nan	nan	x
nan	!= nan	y
nan	nan	nan

Dependencies

C: "kvml.h"

Examples

C interface:

    int i, len = 8; 
    float src1[8] = {-1.5f, -0.0f, 0.0f, 1.0f, 1.5f, -INFINITY, INFINITY, NAN};
    float src2[8] = {-1.1f, 0.0f, +0.0f, -1.0f, -1.5f, +INFINITY, -INFINITY, -NAN}; 
    float* dst = (float*)malloc(sizeof(float) * len); 
    if (dst == NULL) { 
        printf("Malloc Failed!\n"); 
        return 0;
    }
    vsmaxmag(len, src1, src2, dst);

    /** 
     *  Output dst: 
     *     -1.500000 0.000000 0.000000 1.000000 1.500000 inf inf nan
     */

Parent topic: Function Syntax