v?modf

Compute a truncated integer value and the remaining fraction part for the input vector.

Interface Definition

C interface:

void vsmodf(const int len, const float* src, float* dst1, float* dst2);

void vdmodf(const int len, const double* src, double* dst1, double* dst2);

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 vsmodf Double-precision floating-point type for vdmodf	Input vector src with length len. If the pointer is null, a null pointer error is reported and the function returns.	Input
dst1	Single-precision floating-point type for vsmodf Double-precision floating-point type for vdmodf	Output vector dst1 with length len. If the pointer is null, a null pointer error is reported and the function returns.	Output
dst2	Single-precision floating-point type for vsmodf Double-precision floating-point type for vdmodf	Output vector dst2 with length len. If the pointer is null, a null pointer error is reported and the function returns.	Output

Return Value

Each operation value returns the integer value and fraction part of x, which are stored in the memory pointed to by dst1 and dst2, respectively.
For special values, see the following table.
Input Value (src)

Output Value (dst1)

Output Value (dst2)

±0

±0

±0

+inf

+inf

+0

-inf

-inf

-0

nan

nan

nan

Input Value (src)	Output Value (dst1)	Output Value (dst2)
±0	±0	±0
+inf	+inf	+0
-inf	-inf	-0
nan	nan	nan

Dependencies

C: "kvml.h"

Examples

C interface:

    int i, len = 8; 
    float src[8] = {-1.5f, -0.0f, 0.0f, 1.0f, 1.5f, -INFINITY, INFINITY, NAN}; 
    float* dst1 = (float*)malloc(sizeof(float) * len); 
    if (dst1 == NULL) { 
        printf("Malloc Failed!\n"); 
        return 0;
    }
    float* dst2 = (float*)malloc(sizeof(float) * len); 
    if (dst2 == NULL) { 
        printf("Malloc Failed!\n"); 
        return 0;
    }
    vsmodf(len, src, dst1, dst2);

    /** 
     *  Output dst: 
     *     (-1.000000 -0.500000)(-0.000000 -0.000000)(0.000000 0.000000)(1.000000 0.000000)(1.000000 0.500000)(-inf -0.000000)(inf 0.000000)(nan nan)
     */

Parent topic: Function Syntax