scal
Computes the product of a vector by a scalar.
Description
The
scal
routines computes a scalar-vector product. The operation is defined as:
where:
- xis a vector ofnelements
- alphais a scalar
scal
supports the following precisions:T | T_scalar |
---|---|
float | float |
double | double |
std::complex<float> | std::complex<float> |
std::complex<double> | std::complex<double> |
std::complex<float> | float |
std::complex<double> | double |
scal (Buffer Version)
Syntax
namespace oneapi::mkl::blas::column_major {
void scal(sycl::queue &queue,
std::int64_t n,
T_scalar alpha,
sycl::buffer<T,1> &x,
std::int64_t incx)
}
namespace oneapi::mkl::blas::row_major {
void scal(sycl::queue &queue,
std::int64_t n,
T_scalar alpha,
sycl::buffer<T,1> &x,
std::int64_t incx)
}
Input Parameters
- queue
- The queue where the routine should be executed.
- n
- Number of elements in vectorx.
- alpha
- Specifies the scalaralpha.
- x
- Buffer holding input vectorx. Size of the buffer must be at least (1 + (n- 1)*abs(incx)). See ref:matrix-storagefor more details.
- incx
- Stride of vectorx.
Output Parameters
- x
- Buffer holding updated bufferx.
scal (USM Version)
Syntax
namespace oneapi::mkl::blas::column_major {
sycl::event scal(sycl::queue &queue,
std::int64_t n,
T_scalar alpha,
T *x,
std::int64_t incx,
const std::vector<sycl::event> &dependencies = {})
}
namespace oneapi::mkl::blas::row_major {
sycl::event scal(sycl::queue &queue,
std::int64_t n,
T_scalar alpha,
T *x,
std::int64_t incx,
const std::vector<sycl::event> &dependencies = {})
}
Input Parameters
- queue
- The queue where the routine should be executed.
- n
- Number of elements in vectorx.
- alpha
- Specifies the scalaralpha.
- x
- Pointer to the input vectorx. Size of the array must be at least (1 + (n- 1)*abs(incx)). See ref:matrix-storagefor more details.
- incx
- Stride of vectorx.
Output Parameters
- x
- Pointer to updated arrayx.
Return Values
Output event to wait on to ensure computation is complete.