View all newsletters
Receive our newsletter - data, insights and analysis delivered to you
  1. Technology
March 25, 1997updated 05 Sep 2016 12:32pm


By CBR Staff Writer

A few more details of the ARC core (CI No 3,125) from Argonaut RISC Cores Inc have been dredged up (from a back issue of Electronic Engineering Times, which presumably got them from a spec sheet), and we now know that the 32-bit RISC microprocessor has 32 32-bit general-purpose registers as standard, and supports a 32-bit address space for data and a 24-bit address space for code; it can load and store 32-, 16-or 8-bit data at any 32-bit address. The arithmeticlogic unit uses a four-stage pipeline and supports conditional execution of standard instructions – the base instruction set – with optional flag setting: the base set comprises 15 three-operand instructions and 11 two-operand instructions for basic arithmetic and logic operations, but a host port enables ARC registers to be accessed from another processor for debugging or when an ARC is controlled by a main processor or is part of a multiprocessor architecture. But the key feature is that the architecture provides for up 16 additional three-operand instructions and up to 55 additional two-operand instructions, which any implementor can add to the set – and up to 60 general-purpose 32-bit registers plus additional special-purpose registers are possible, for zero latency access. The part is flexibly extensible and optional modules available include a five-cycle pipelined 32 by 32-bit multiplier, a single-cycle 32-bit barrel-shifter and rotator block and a 16-bit multiplier with optional 36-bit accumulator. A left-shifting 32-bit block is available to find the first significant bit of a word in support of a normal instruction, and a local scratch-pad static RAM supporting a block move to memory.

Topics in this article :
Websites in our network
Select and enter your corporate email address Tech Monitor's research, insight and analysis examines the frontiers of digital transformation to help tech leaders navigate the future. Our Changelog newsletter delivers our best work to your inbox every week.
  • CIO
  • CTO
  • CISO
  • CSO
  • CFO
  • CDO
  • CEO
  • Architect Founder
  • MD
  • Director
  • Manager
  • Other
Visit our privacy policy for more information about our services, how New Statesman Media Group may use, process and share your personal data, including information on your rights in respect of your personal data and how you can unsubscribe from future marketing communications. Our services are intended for corporate subscribers and you warrant that the email address submitted is your corporate email address.