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...
1-D Packed and1-D Unpacked Array 下面是一个一维packed数组和1维unpacked数组的示例: module PU; logic [31:0] v1 [7:0]; //1-D packed & 1-D unpacked (memory) initial begin //Array Index 7 of unpacked v1[7] = 'h FF_FF_FF_FF; //equivalent to v1[7][31:0] $display(v1); ...
unpacked数组和packed数组的主要区别是unpacked数组在物理存储时不能保证连续,而packed数组则能保证在物理上连续存储。 另一种看待unpacked数组和packed数组差异点的角度是,packed数组可以看成一个整体,一个单一向量。 unpacked数组的维度是在数组名称之后声明的,数组中内容可以是任何数据类型或者其他数组。 bit uP [3:0]...
SystemVerilog 中有两种类型的数组- packed array 和 unpacked array。 packed array用于引用在变量名称之前声明的维度。 bit[3:0]data;// Packed array or vectorlogicqueue[9:0];// unpacked array packed array保证表示为一组连续的位。它们只能用于单位数据类型(如、和其他递归packed array)组成。bitlogic Sing...
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位寄存器变量。这种存储方式使得位选择操作更直观,比如packed_array[2]直接指向第三位。与之对应的unpacked数组更像是传统编程语言中的数组概念,每个元素...
On this issue I'm reporting: A bug(?) I found when trying to declare a parameter as a packed array (note that issue #846 refers to unpacked arrays). A suggestion/request to improve the error message displayed on unsupported features. I w...
"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...
Here's my SV packed array // dut.sv module dut (...); ... logic [8-1:0][16-1:0] mem_a; After verilator compilation I can see that it was flattened into 1 dimensional array // obj_dir/dut.h VL_SIGW(dut__DOT__mem_a,127,0,4); And the same in the VCD waveform $var...
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....
newBitPackedBuffer(contents?:Uint8Array|Buffer,endian?:'big'|'little') Reading Operations MethodDescriptionExample read.bits(count)Read 1-32 bitsbuffer.read.bits(5) read.bytes(count)Read multiple bytesbuffer.read.bytes(4) read.string(length)Read fixed-length stringbuffer.read.string(10) ...