Visible to Intel only — GUID: GUID-5D9ECEC2-992A-4DF8-A92A-726A5D4435CF
Visible to Intel only — GUID: GUID-5D9ECEC2-992A-4DF8-A92A-726A5D4435CF
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:
x is a vector of n elements
alpha is a scalar
scal supports the following precisions:
T |
Ts |
---|---|
sycl::half |
sycl::half |
oneapi::mkl::bfloat16 |
oneapi::mkl::bfloat16 |
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, Ts 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, Ts 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. Size of the buffer must be at least (1 + (n - 1)*abs(incx)). See ref: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, Ts 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, Ts 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. Size of the array must be at least (1 + (n - 1)*abs(incx)). See ref:matrix-storage for more details.
- incx
-
Stride of vector x.
Output Parameters
- x
-
Pointer to updated array x.
Return Values
Output event to wait on to ensure computation is complete.