Attribute Macro multiversion::target

#[target]

Provides a less verbose equivalent to the target_arch and target_feature attributes.

A function tagged with #[target("[x86|x86_64]+avx+avx2")], for example, is equivalent to a function tagged with each of:

• #[target_arch(any(target_arch = "x86", target_arch = "x86_64"))]
• #[target_feature(enable = "avx")]
• #[target_feature(enable = "avx2")]

The target attribute is intended to be used in tandem with the multiversion attribute to produce hand-written multiversioned functions.

Helper attributes

• #[safe_inner]
  • Indicates that the inner contents of the function are safe and requires the use of unsafe blocks to call unsafe functions.

Static dispatching

The target attribute allows functions called inside the function to be statically dispatched. See static dispatching for more information.

Conditional compilation

The target attribute supports conditional compilation with the #[target_cfg] helper attribute. See conditional compilation for more information.