System verilog SystemVerilog数组索引
我有这样一个模块:System verilog SystemVerilog数组索引,system-verilog,System Verilog,我有这样一个模块: module ArrayTest(input logic clk, [9:0] sindex, output shortint OBYTE); shortint ima_step_table[89] = { 7, 8, 9, 10, 11, 12, 13, 14, 16, 17, 19, 21, 23, 25, 28, 31, 34, 37, 41, 45, 50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
module ArrayTest(input logic clk, [9:0] sindex, output shortint OBYTE);
shortint ima_step_table[89] = {
7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
};
initial begin
OBYTE <= -1;
end
always@ (posedge clk) begin
OBYTE = ima_step_table[sindex];
end
endmodule
模块阵列测试(输入逻辑时钟,[9:0]sindex,输出shortint OBYTE);
shortint ima_step_表[89]={
7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
};
初始开始
OBYTE我认为如何将数组建模和初始化为循环表取决于合成工具对SystemVerilog的支持程度。在SystemVerilog中,我会在ima\u step\u表
中声明为参数
或常量
,以指示它永远不会被写入。但是许多合成工具仍然只支持Verilog-1995语法,它只允许您选择initial
块来初始化数组。Verilog-2001增加了变量声明初始化,但不适用于数组。SystemVerilog添加了数组文字,并且能够将数组声明为参数
或常量
将数组初始化设置为初始值已经奏效,但如果有人能解释这一区别,我仍然很感激。