Arm Announces New Mobile Armv9 CPU Microarchitectures
I will shed a small tear for the passing of AArch32 as it was the first processor architecture I really enjoyed programming.<p>I wrote hundreds of thousands of lines of assembler for it and what a fun architecture it was to program for. Enough registers to mean you rarely needed extra storage in a function and conditional instructions to lose those branches and combine that with 3 register arguments to each instruction meant that there was lots of opportunity for optimisation. Plus the (not very RISC but extremely useful) load and store multiple instructions and that made it a joy to work with.<p>AArch64 is quite nice too but they took a some of the fun out of the instruction set - conditional execution and load and store multiple. They did that for good reason though in order to make faster superscalar processors so I don't blame them!