llvm

cb9b7b70 - [Doc][SPIR-V] Move FP4 E2M1 to SPV_EXT_ocp_microscaling_types (#22528)

[Doc][SPIR-V] Move FP4 E2M1 to SPV_EXT_ocp_microscaling_types (#22528) Represent the FP4 (E2M1) type with the multi-vendor [SPV_EXT_ocp_microscaling_types](https://github.khronos.org/SPIRV-Registry/extensions/EXT/SPV_EXT_ocp_microscaling_types.html) extension (Float4E2M1EXT encoding) instead of the Intel-only `SPV_INTEL_float4`, for both plain values and cooperative-matrix component types. Repoint `mini_float_conversions_env.asciidoc` to the EXT encoding and extension. Narrow` SPV_INTEL_float4` to a single role: it no longer defines an encoding or plain-type capability, and only adds `Float4E2M1CooperativeMatrixINTEL` to enable the `Float4E2M1EXT` type as a cooperative-matrix component type. AI-assisted: Claude Opus 4.8 (commercial SaaS)