v?trunc

Compute the integer value of the input vector rounded towards 0 and return the value as a floating-point number.

Interface Definition

C interface:

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

void vdtrunc(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 vstrunc Double-precision floating-point type for vdtrunc	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 vstrunc Double-precision floating-point type for vdtrunc	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 vstrunc
Double-precision floating-point type for vdtrunc

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 vstrunc
Double-precision floating-point type for vdtrunc

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 result of x rounded towards 0 is returned for each operation value.
For special values, see the following table.
Input Value (src)

Output Value (dst)

+0

+0

-0

+0

+inf

+inf

-inf

-inf

nan

nan

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

Dependencies

C: "kvml.h"

Examples

C interface:

float src[LEN] = {1.1f, -2.1f, INFINITY, NAN};
float* dst = (float*)malloc(sizeof(float) * LEN);
if (dst == NULL) {
    printf("Malloc Failed!\n");
    return;
}
vstrunc(LEN, src, dst);
/**
 *  Output dst:
 *     1.0  -2.0  INFINITY  nan
 *
 */

Parent topic: Function Syntax