2.1.2、嵌套的条件运算符(Nested Conditional Operators) 虽然这并不常见,但设计者也可以使用嵌套的条件运算符(Nested Conditional Operators)来编写代码,以实现更大的多路选择器。 接下来将以一个4选1多路选择器为例进行说明,如下图电路所示。 为了使用条件运算符在 verilog 中实现此电路,可以将该多路选择器视为一...
Conditional Operators The conditional operator has the following C-like format: cond_expr ? true_expr : false_expr The true_expr or the false_expr is evaluated and used as a result depending on what cond_expr evaluates to (true or false). Example 1 module conditional_operator(); 2 3...
4‐to‐1 multiplexer ‐ nested conditional operatorsVerilog HDL and case‐equality operatorsHamming encoder logic diagramBuilt-In Primitives and TypesOperators and ExpressionsExample Illustrating the Use of Verilog HDL Operators: Hamming Code EncoderReferences...
Conditional operators have two separate operators that separate three operands x=~y;// ~ is a unary operator, and y is the operandx=y|z;// | is a binary operator, where y and z are its operandsx=(y>5)?w:z;// ?: is a ternary operator, and the expression (y>5), w and z ...
. s Ternary expressions can be nested within each other indefinitely s Provides mapping from the if-else statement. s The conditionaloperator has the lowest precedence of all theoperators listed in this chapter. Verilog-A Functions and Operators Generate Statement 5-45 s Thegenerate statement...
Xilinx官方verilog指南.pdf,Chapter 7 Verilog Language Support This chapter contains the following sections. Introduction Behavioral Verilog Features Structural Verilog Features Parameters Verilog Limitations in XST Verilog Meta Comments Language Support T
7.18 Streaming operators (pack / unpack) 737.19 Conditional operator ...777.20 Set membership...77Section 8 Procedural Statements and Control Flow... 798.1 Introduction (informative) 798.2 Statements .798.3 Blocking and nonblocking assignments ...808.4 Selection statements...818.5 Loop statements ...
Example 5.8: T-latch with active-low reset (nested conditional operators) module Latch_Rbar_CA (q_out, data_in, enable, reset_bar); output q_out; input data_in, enable, reset_bar; assign q_out = !reset_bar ? 0 : enable ? data_in : q_out; ...
Operators Signed Expressions Procedural Programming Assignments Conditional if-else Statement Case Statement Loop Statements Tasks and Functions Tasks Functions (Automatic and Static) Modules and Hierarchy Connecting Modules Connecting Modules with Wildcard Ports Interfaces Modports Miscellaneo...
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。 上传者:rhett_butler时间:2011-11-19