For a dynamic array, it is possible to randomize both array size and array elements. randomize dynamic array size In below example, dynamic array size will get randomized based on size constraint, and array elements will get random values. Declare array as rand Write constraint for array size,...
systemverilog // 删除动态数组中的第二个元素(索引为1) int index_to_delete = 1; for (int i = index_to_delete; i < dynamic_array.size() - 1; i++) { dynamic_array[i] = dynamic_array[i + 1]; } // 减小数组的大小(这一步是可选的,取决于是否希望保留数组的当前大小但有空洞) ...
Dynamic Array Mathods moduletb;// Create a dynamic array that can hold elements of type stringstringfruits [];initialbegin// Create a size for the dynamic array -> size here is 5// so that it can hold 5 valuesfruits =new[3];// Initialize the array with five valuesfruits = '{"apple...
data_type array_name [ ]; 下面是简单的动态数组示例: module darray; integer da [ ]; //dynamic array ‘da’ of type integer initial begin da = new[4]; //construct and allocate a size of 4 elements $display($stime,,, "da size = %0d",da.size); da.delete( ); //delete elements...
Dynamic Arrays – Resizing 下面的示例展示了SystemVerilog动态数组的大小更改。 module darray; bit [7:0] d_array1[ ]; initial begin //memory allocation d_array1 = new[2]; $display($stime,,, "d_array1 size = %0d",d_array1.size); ...
randintsome_dynamic_array[]; constraint last_elem_c { some_dynamic_array[some_dynamic_array.size() -1] ==5; } 上面是最先想到的写法,但是会报错,因为SV约束语法不允许使用size()或任何其他随机值作为索引。所以只能修改代码: constraintlast_elem_c {foreach(some_dynamic_array[i])if(i == some_...
SystemVerilog相比于Verilog提供了功能更加丰富的数组类型,包括定长数组(Fixed-size Array)、动态数组(Dynamic Array)、关联数组(Associative Array),还有为多维数组的切片索引提供方便而做区分的合并数组(Packed Array)和非合并数组(Unpacked Array)。 01定长数组和动态数组 定长数组在声明的时候就必须指定数组的长度(紧凑...
最容易理解的数组约束函数是size(),他可以约束动态数组或者队列的元素个数。 class dynamic_size_array(); rand logic [31:0] dyn_array[]; constraint cst_dyn_array { dyn_array.size() inside {[1:10]}; foreach(dyn_array[i]) { dyn_array[i] inside {[0:2]}; ...
data[i].size() == $bits(data[i]); // 确保每个数组元素的大小是随机位宽 } } function new(); super.new(); array_size = 0; endfunction function void pre_randomize(); data = new[$]; endfunction endclass module test; initial begin RandomWidthArrayExample rand_example = new; rand_exam...
foreach(some_dynamic_array[i]) if(i == some_dynamic_array.size() -1) some_dynamic_array[i] ==5; } 2、约束数组中必须包含一个特定的值2。 constraintcontains_c{ 2inside{ some_dynamic_array }; } 相反,如果我们约束数组中不包含值2呢?