pub const VULKAN_TOSA_FP8_TARGET: Target;Expand description
The FP8 tier’s target: TOSA 1.0, floating-point profile, level 8K, both FP8 extensions.
Unlike the FP16 tier, this cannot share VULKAN_TOSA_TARGET’s identity. FP16 lives in the
base floating-point profile, so narrowing dtypes under one target was enough (ADR 0008); FP8
legality is gated on ExtensionSet::FP8E4M3 / FP8E5M2, so the envelope itself differs and
the tier needs a target of its own — the same split virtio-accel-xdna makes (ADR 0009).