The article speculates why the RISC‑V integer ISA does not define a multiply‑accumulate (MAC) instruction, examining how such an instruction would affect integer‑unit micro‑architecture, decoder width, rename complexity, and OoO window size, and compares these trade‑offs with ARM and Apple M1 designs.
This article provides a comprehensive overview of modern processor instruction set architectures, comparing CISC‑based x86 with RISC‑based ARM and RISC‑V, discussing their historical development, design philosophies, advantages, disadvantages, and current market adoption in both domestic and global contexts.
Arm's newly unveiled Armv9 architecture, presented at Vision Day, introduces major enhancements across security, artificial intelligence, and scalable vector extensions (SVE2), while outlining a roadmap for future CPUs, performance gains, and the confidential compute architecture that reshapes trust boundaries in modern computing.
Arm's latest Armv9 architecture, unveiled after a decade of Armv8 evolution, introduces major ISA extensions such as SVE2, strengthens security with the Confidential Compute Architecture, adds AI‑focused capabilities, and outlines a roadmap for future CPUs across mobile, server and edge devices.
This article chronicles the development, competition, and strategic shifts of the x86 and ARM processor ecosystems from their early days through recent innovations, highlighting key architectural decisions, market dynamics, and the evolving role of software abstraction layers in shaping the semiconductor landscape.
