1 压缩数组 压缩数组通常用来描述连续存储的比特流(bit)。压缩数组可以将连续存储的比特流分割成多个等长的数据片段,可以非常灵活地按位访问比特流的部分或者全部。压缩数组可以是一维或者多维的。 压缩数组定义:维度写在数组名的前面。 比如: bit[31:00]reg_1;//一维数组bit[03:00][07:00]arr_1;//二维数组 ...
1. 维度在标识符前面的部分称为packed array,在标识符后面的部分称为unpacked array,一维的pakced array也称为vector。 packed array packed array只能由单bit数据类型(bit,logic,reg)、enum以及其他packed array和packed structure组成。packed array保证在内存中一定是一段连续的bit unpacked array unpacked array的元...
verilog中的packed语法 在Verilog语言里,packed语法用来定义数据存储的结构特性。这种语法通过连续的位排列实现紧凑存储,常用于需要直接操作特定位数据的场景。理解packed语法的核心在于把握其与unpacked语法的区别,以及在不同应用场景下的选择依据。 packed数组的每个元素占据连续内存空间,比如声明reg[3:0]packed_array表示4...
<line 140> packed_struct [10:0] array_of_structs; I get the following error: Error (10168): SystemVerilog Declaration error at *.v(140): prefix for packed array type does not refer to a packable type :confused: System Verilog does support packed arrays of ...
I'm sharing this code which is a demo of how to manipulate a SystemVerilog Packed Array (SV data structure) using DPI. Unpacked refers to anything on the left side of an array. logic [7:0] my_array [1023:0] |-- packed |-- unpacked This code will work with IUS5.83....
I managed to figure out that this was due to issue #846 (Parameters having an unpacked array type is a SystemVerilog feature that isn't supported yet), but iverilog could at least try to figure out what I was trying to do and tell me that that's not supported; the error message as...
"Error (10053): Verilog HDL error at rom_sin.v(274): can't index object "MY_ROM" with zero packed or unpacked array dimensions" Please tell me why this error occurs and how to fix it. Thank you so much! Translate Tags: Intel® Quartus® Prime Software 0 Kudos Re...
There would be a class decorator that would create an object that maps to a packed struct in SystemVerilog by using type annotations to describe the structure.@packed_struct class Example: field1: LogicArray[7:"to":0] # specify direction in bounds field2: LogicArray[0:4][31:0] # ...
问题描述: packed array和 unpacked array,是我在SV里学到的概念。 但是在quartus syn的时候,会报错。 解决方法: 1. packed array的概念 2.以sv格式添加... 查看原文 Systemverilog语言(3)---data types(1/2) ):表示位扩展信号,可以将每一位扩展为指定值;但是注意全1是不能扩展的,必须全部写出来,如上例...
Table E-2 defines the encoding used for a packed logic array represented as svLogicVec32. Table E-2: Encoding of bits in svLogicVec32