ACLE 2024 Q4

Release highlights

The documents modified in this release are:

• Arm C Language Extensions.
• Arm Neon Intrinsics Reference.

List of changes

• Unified Function Multi Versioning features ssbs and ssbs2.
• Unified Function Multi Versioning features memtag and memtag2.
• Unified Function Multi Versioning features aes and pmull.
• Unified Function Multi Versioning features sve2-aes and sve2-pmull128.
• Removed Function Multi Versioning features sve-bf16, sve-ebf16, and sve-i8mm.
• Removed Function Multi Versioning features ebf16, memtag3, and rpres.
• Removed Function Multi Versioning feature dgh.
• Removed Function Multi Versioning features ls64 and predres.
• Document Function Multi Versioning feature dependencies.
• Clarify Function Multi Versioning feature dependency rule.
• Simplified Function Multi Versioning version selection rules.
• Fixed range of operand o0 (too small) in AArch64 system register designations.
• Fixed SVE2.1 quadword gather load/scatter store intrinsics.
• Removed unnecessary Zd argument from svcvtnb_mf8[_f32_x2]_fpm.
• Changed name mangling of function types to include SME attributes.
• Changed __ARM_NEON_SVE_BRIDGE to refer to the availability of the arm_neon_sve_bridge.h header file, rather than the NEON-SVE bridge intrinsics.
• Removed extraneous const from SVE2.1 store intrinsics.
• Added __arm_agnostic keyword attribute.
• Refined function versioning scope and signature rules to use the default version scope and signature.
• Added _n forms of the SVE2p1 and SME2 svdot intrinsics.
• Changed the status of the SME2p1 from Alpha to Beta.
• Changed the status of the SVE2p1 from Alpha to Beta.
• Added mf8 variants of SME 2.1 intrinsics.
• Added svdot[_n_f16_mf8]_fpm and svdot[_n_f32_mf8]_fpm.
• Added Guarded Control Stack (GCS) at Beta quality level.