arm64-features ( -- features )

Vocabulary

cpu.arm.64.features

Inputs

None

Outputs

features

a sequence

Word description

Returns the optional ARM64 features detected for this process, excluding disabled features. Supported names are dotprod, fp16, bf16 and i8mm. Detection is reset when an image starts. Windows uses IsProcessorFeaturePresent: DotProd requires Windows 11 or Windows Server 2022, while the FP16, BF16 and I8MM queries require Windows 11 version 24H2 or Windows Server 2025. Features that the operating system cannot detect stay disabled, even when the processor implements them.

Definition

USING: kernel namespaces sets ;

IN: cpu.arm.64.features

: arm64-features ( -- features )
    "disable-neon-extensions" get
    [ { } ]
    [ detected-arm64-features disabled-arm64-features get diff ]
    if ;