1. Introduction

This is the 2019-06 release of the A64 ISA XML for Future Architecture Technologies.

The Proprietary Notice gives details of the terms and conditions under which this package is provided.

2. Contents

3. Release Notes

Change history

This is the A64 ISA XML for Future Architecture Technologies (2019-06).

• SVE instructions that may be prefixed by a MOVPRFX instruction now contain Operational information that describes which variants of MOVPRFX can be used and the register constraints to be honored to guarantee predictable behavior.
• SVE instructions whose timing properties are affected by PSTATE.DIT now contain Operational information that describes the effects on their execution timing when PSTATE.DIT is 1.
• Many simple clarifications and corrections are also present, but are too small to be listed here. These can be seen in the Change Markup PDF provided.

Known issues

• The Programmable table lookup (TBL) instruction is currently listed in the Base instructions index. TBL is an SVE and SVE2 instruction, with encodings from both the SVE and SVE2 classes. The correct grouping for TBL is under 'SVE instructions'.
• The SVE MOV(S) aliases of AND(S) (predicates), ORR(S) (predicates) and SEL (predicates) are missing a qualifier to differentiate the different types of instructions.
• The SVE CLASTA (vectors), CLASTB (vectors), COMPACT, LASTA (vectors), LASTB (vectors), and SPLICE instructions incorrectly state that they can be used with a predicated MOVPRFX instruction.