Morello Curiosities =================== This page is to help developers explain behaviour of the ARM Morello SoC that may seem curious. Branching to capabilities with LSB 0 ------------------------------------ Branching to a capability with LSB 0 will disable purecap capability mode. Quoting from the ``ArmĀ® Architecture Reference Manual Supplement Morello for A-profile Architecture``, p. 1264: .. code-block:: BranchXToCapability(Capability target, BranchType branch_type) PSTATE.C64 = target<0>; target<0> = '0'; BranchToCapability(target, branch_type); Branching to a capability with LSB 1 will enable purecap capability mode.