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Lecture 09: RISC-V Pipeline Implementa8on

Pipelined RISC-V Datapath without jumps 12 IR IR IR PC A B Y R MD1 MD2 addr inst Inst Memory 0x4 Add IR Imm Select ALU rd1 GPRs rs1 rs2 wa wd rd2 we Data wdata Memory addr wdata rdata we ImmSel Op2Sel WBSel MemWrite RegWriteEn F D E M W Control Points Need to Be Connected ALU Control

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Lecture 04 RISC-V ISA

passlab.github.io

Goals in Defining RISC-V • A completely open ISA that is freely available to academia and industry • A real ISA suitable for direct native hardware implementation, not just simulation or binary translation • An ISA that avoids "over-architecting" for – a particular microarchitecture style (e.g., microcoded, in-order, decoupled, out-of-

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Lecture 04 RISC-V ISA - GitHub Pages

passlab.github.io

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The RISC-V Instruction Set Manual

riscv.org

Dec 13, 2019 · The RISC-V Instruction Set Manual Volume I: Unprivileged ISA Document Version 20191213 Editors: Andrew Waterman 1, Krste Asanovi´c,2 1SiFive Inc., 2CS Division, EECS Department, University of California, Berkeley andrew@sifive.com, krste@berkeley.edu

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The RISC-V Instruction Set Manual

riscv.org

The RISC-V Instruction Set Manual Volume I: Unprivileged ISA Document Version 20190608-Base-Ratified Editors: Andrew Waterman 1, Krste Asanovi´c,2 1SiFive Inc., 2CS Division, EECS Department, University of California, Berkeley andrew@sifive.com, krste@berkeley.edu

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Free & Open Reference Card

www.cl.cam.ac.uk

RISC-V Integer Base (RV32I/64I/128I), privileged, and optional compressed extension (RVC). Registers x1-x31 and the pc are 32 bits wide in RV32I, 64 in RV64I, and 128 in RV128I (x0=0). RV64I/128I add 10 instructions for the wider formats. The RVI base of <50 classic integer RISC instructions is required.

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Atmel ATmega640/V-1280/V-1281/V-2560/V-2561/V

ww1.microchip.com

2549Q–AVR–02/2014 Features • High Performance, Low Power Atmel® AVR® 8-Bit Microcontroller † Advanced RISC Architecture – 135 Powerful Instructions – Most Single Clock Cycle Execution – 32 × 8 General Purpose Working Registers

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inst.eecs.berkeley.edu

RISC-V Feature, n×16-bit instructions • Extensions to RISC-V base ISA support 16-bit compressed instructions and also variable-length instructions that are multiples of 16-bits in length • 16-bit = half-word • To enable this, RISC-V scales the branch offset to be half-words even when there are no 16-bit instructions

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RISC-V External Debug Support Version 0.13.2 ...

raw.githubusercontent.com

RISC-V ISA. System designers may choose to add additional hardware debug support, but this speci cation de nes a standard interface for common functionality. 1.1 Terminology A platform is a single integrated circuit consisting of one or more components. Some components may be RISC-V cores, while others may have a di erent function.

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assets.publishing.service.gov.uk

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