__mul_i32toi64

Applicability

Product	Supported
Atlas 350 Accelerator Card	√
Atlas A3 training product/Atlas A3 inference product	x
Atlas A2 training product/Atlas A2 inference product	x
Atlas 200I/500 A2 inference product	x
Atlas inference product AI Core	x
Atlas inference product Vector Core	x
Atlas training product	x

Function Usage

Computes the product of two 32-bit integer inputs, x and y, and returns a 64-bit result.

Prototype

long long __mul_i32toi64(int x, int y)

unsigned long long __mul_i32toi64(unsigned int x, unsigned int y)

Parameters

**Table 1** Parameters
Parameter	Input/Output	Description
x	Input	Source operand, multiplier.
y	Input	Source operand, multiplier.

Returns

The 64-bit result of the product of inputs x and y.

Restrictions

For SIMT programming, this API is not supported.

Header File to Be Included

To use this API, the simt_api/device_functions.h header file must be included.

Examples

For SIMD and SIMT programming:

__simt_vf__ __launch_bounds__(1024) inline void KernelMmul_i32toi64(__gm__ long long* dst, __gm__ int* x, __gm__ int* y)
{
    int idx = threadIdx.x + blockIdx.x * blockDim.x;
    dst[idx] = __mul_i32toi64(x[idx], y[idx]);
}

__simt_vf__ __launch_bounds__(1024) inline void KernelMmul_i32toi64(__gm__ unsigned long long* dst, __gm__ unsigned int* x, __gm__ unsigned int* y)
{
    int idx = threadIdx.x + blockIdx.x * blockDim.x;
    dst[idx] = __mul_i32toi64(x[idx], y[idx]);
}

Parent topic: Mathematical Functions