Glossary

accelerator

Specialized component containing compute resources that can quickly execute a subset of operations. Examples include CPU, FPGA, GPU. See also: device

accessor

Interface to read and write data contained in a buffer, image, or local memory. Accessors implicitly define the data dependences when kernels and the host access a buffer. See Accessors.

application scope

Code that executes on the host.

buffers

Encapsulates data that is must be accessed by the device. See Buffers.

command group scope

Code that acts as the interface between the host and device.

command queue

Issues command groups concurrently.

compute unit

A grouping of processing elements into a ‘core’ that contains shared elements for use between the processing elements and with faster access than memory residing on other compute units on the device.

device

An accelerator or specialized component containing compute resources that can quickly execute a subset of operations. A CPU can be employed as a device, but when it is, it is being employed as an accelerator. Examples include CPU, FPGA, GPU. See also: accelerator

device code

Code that executes on the device rather than the host. Device code is specified via lambda expression, functor, or kernel class.

fat binary

Application binary that contains device code for multiple devices. The binary includes both the generic code (SPIR-V representation) and target specific executable code.

fat library

Archive or library of object code that contains object code for multiple devices. The fat library includes both the generic object (SPIR-V representation) and target specific object code.

fat object

File that contains object code for multiple devices. The fat object includes both the generic object (SPIR-V representation) and target specific object code.

host

A CPU-based system (computer) that executes the primary portion of a program, specifically the application scope and command group scope.

host device

A SYCL device that is always present and usually executes on the host CPU.

host code

Code that is compiled by the host compiler and executes on the host rather than the device.

images

Formatted opaque memory object that is accessed via built-in function. Typically pertains to pictures comprised of pixels stored in format like RGB.

kernel scope

Code that executes on the device.

nd-range

Short for N-Dimensional Range, a group of kernel instances, or work item, across one, two, or three dimensions.

processing element

Individual engine for computation that makes up a compute unit.

single source

Denotes that source code for device and host can be in the same file.

SPIR-V

Binary intermediate language for representing graphical-shader stages and compute kernels.

sub-group

Collection of work-items in a work-group. Arranging computations in sub-groups may enables the use of SIMD instructions.

work-group

Collection of work-items that execute on a compute unit.

work-item

Basic unit of computation for a single point in the index space processed by a kernel.