SystemVerilog作为当今主流的硬件设计和验证语言,其精确的事件调度机制是保证仿真确定性的核心。本文将结合具体示例,深入剖析SystemVerilog的调度原理,揭示其背后的分层时间推进模型。 核心概念:事件驱动仿真 SystemVerilog仿真器本质是一个离散事件驱动的模拟引擎,其核心是通过动态更新的事件队列(Event Queue)来模拟硬件行为。
SystemVerilog Event Scheduling Algorithm While simulating System Verilog design and its test-bench including assertions, events has to be dynamically scheduled, executed, and removed as the simulator advances time. To have this feature, simulator has to maintain a data structure and usually would be ...
Scheduling Difference between Verilog and SystemVerilog In Verilog-2001, variables that were initialized when declared were scheduled to execute at time-0 as if they had been assigned in an initial block, in a non-deterministic order and they would cause a time-0 event. In SystemVerilog, variab...
从Verilog到SystemVerilog的发展过程来看,两种语言都有其产生的必要性。Verilog在上世纪80年代中期产生,解决了当时一万门 以上设计面临的种种问题,Verilog的产生带来了门级设计到RTL级设计的变革,接下来的近20年,随着设计规模的扩大,Verilog也在不断的演 变和扩展,但是抽象层次始终徘徊在RTL级别;进入90年代以后,Verilog...
Section 1 Introduction to SystemVerilog ... 1Section 2 Literal Values... 42.1 Introduction (informative) ..42.2 Literal value syntax.42.3 Integer and logic literals ..42.4 Real literals .52.5 Time literals 52.6 String literals52.7 Array literals 62.8 Structure literals .6Section 3 Data Types...
active inactive IEEE1364 iterative IEEE1364 iterative IEEE1364 iterative pre-NBA NBA post-NBA IEEE1364 iterative IEEE1364 iterative the SystemVerilog simulation reference algorithm execute_simulation { T = 0; initialize the values of all nets and variables; schedule all initialization events into time ...
of clearly defined scheduling semantics • Assertion co-simulation overhead can be reduced by coding assertions intelligently in SVA SystemVerilog Assertion Example A concise description of complex behaviour: After request is asserted, acknowledge must come 1 to 3 cycles later 0 1 2 3 4...
SystemVerilog 3.1a 语言参考手册【中文版】 随着FPGA和ASIC开发的规模越来越大,功能越来越复杂,对验证和开发的要求越来越高,systemverilog无论在开发还是在验证上都有verilog/vhdl无可比拟的优越性。该文档是systemverilog标准的中文版,具有相当高的参考价值。
SystemVerilog Assertion Handbook外文.pdf,ii SystemVerilog Assertions Handbook SystemVerilog Assertions Handbook … for Formal and Dynamic Verification Published by: VhdlCohen Publishing P.O. 2362 Palos Verdes Peninsula CA 90274-2362 vhdlcohen@ Library of
Events usually carry a totally-ordered time stamp indicating the time at which the event occurs. A DE simulator usually maintains a global event queue that sorts events by time stamp. Digital hardware is often simulated using a discrete-event approach. The Verilog language, for example, was ...