添加default_nettype none将使第二行代码出错,从而使错误更加明显。 Unpacked vs. Packed Arrays 你可能已经注意到,在声明中,vector索引写在vector名称之前。这声明了数组的“打包”维度,其中的位被“打包”在一起形成一个blob(这在模拟器中是相关的,但在硬件中不是)。未打包的维度在名称之后声明。它们通常
打包向量(packed vectors) 是指向量中的元素在内存中是紧密排列的,它们共享相同的地址空间。这种类型的向量通常用于减少内存占用和提高性能。在SystemVerilog中,可以使用bit、logic或reg类型声明一个打包向量。例如: 代码语言:verilog 复制 bit [7:0] packed_vector; 未打包向量(unpacked vectors) 是指向量中的每个元...
wire[2:0] w1;assignxxx = w1[0:2];// 错误:声明时为上界在前,下界在后,则访问时必须为上界在前,下界在后 Unpacked arrays vs. Packed arrays reg[7:0] mem [255:0];// 256个unpacked元素,每个元素都是一个8-bit reg(packed vector)regmem [28:0];// 29个unpacked元素,每个元素都是1-bit的re...
Packed + Unpacked Array 下面显示的示例演示了一个多维packed+unpacked数组。 moduletb;bit[3:0][7:0] stack [2][4];// 2 rows, 4 colsinitialbegin// Assign random values to each slot of the stackforeach(stack[i])beginforeach(stack[i][j])beginstack[i][j] =$random;$display("stack[%0...
多维压缩数组,以及多位压缩数组的选择(selections within multidimensional packed arrays)是可综合的。当设计需要经常引用向量的某些分区时,这一特性会很有用。例如在上面的例子中,这一特性就使得我们能够更加容易地从32bit向量中选择字节(byte)。 2.5 数组(非压缩数组) Array (unpacked arrays) ...
- Packed & unpacked arrays, unions and structs allow greater abstraction and more concise coding. The new dynamic array types facilitate behavioral modeling and assist in the development of verification environments. Semaphores and mailboxes are sometimes used in advanced verification methodologies such as...
Structs, Unions, Packed & Unpacked Arrays - Packed & unpacked arrays, unions and structs allow greater abstraction and more concise coding. The new dynamic array types are used more in verification and have been moved to the UVM training course. Structs & assignment patterns Packed &...
23.16.1 Writing packed data23.16.2 Writing 2-state types23.16.3 Writing addresses to output file23.17 File format considerations for multi-dimensional unpacked arrays23.18 System task arguments for multi-dimensional unpacked arrays第二十四章 VCD数据第二十五章 编译器指令25.1 简介(一般信息)25.2 `define宏...
C macro SV_PACKED_DATA_NELEMS(width) Convert from bits to number of elements typedef unsigned int svBitVecVal; /* (a chunk of) packed bit array */ typedef struct { unsigned int aval; unsigned int bval;} svLogicVecVal; /* (a chunk of) packed logic array */ ...
Table of Contents Section 1 Introduction to SystemVerilog ... 1 Section 2 Literal Values...