scal¶
Computes the product of a vector by a scalar.
Description
The scal routines computes a scalar-vector product:
where:
x is a vector of n elements,
alpha is 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 vector
x.- alpha
Specifies the scalar
alpha.- x
Buffer holding input vector
x. The buffer must be of size at least (1 + (n- 1)*abs(incx)). See Matrix Storage for more details.- incx
Stride of vector
x.
Output Parameters
- x
Buffer holding updated buffer
x.
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 vector
x.- alpha
Specifies the scalar
alpha.- x
Pointer to the input vector
x. The array must be of size at least (1 + (n- 1)*abs(incx)). See Matrix Storage for more details.- incx
Stride of vector
x.
Output Parameters
- x
Pointer to the updated array
x.
Return Values
Output event to wait on to ensure computation is complete.
Parent topic: BLAS Level 1 Routines