when those rules are in conflict with the longstanding behavior of the Apple LLVM compiler (Clang) on Apple platforms, then the ABI typically diverges from the standard Processor Specific Application Binary Interface (psABI) and instead follows longstanding behavior. Several such divergences are below...
See the draft amd64 psABI document System V Application Binary Interface, AMD64 Architecture Processor Supplement, Draft Version 0.92.Address Space Layout for amd64 ApplicationsFor 64-bit applications, the layout of the address space is closely related to that of 32-bit applications, though the ...
Among other architecture improvements, a 64-bit ARM processor includes twice as many integer and floating-point registers as earlier processors do. As a result, 64-bit apps can work with more data at once for improved performance. Apps that extensively use 64-bit integer math or customNEON ope...
Module 2: ARMv8-A 64-bit Overview - Introduces topics like: 64-bit virtual addressing, AArch64 vs AArch32, A64 ISA, LP64 and LLP64, instruction encodings, processor registers, exception levels Module 3: Integer (General Purpose) Registers - 64-bit usage, Stack Pointer (SP), Program Cou...