SV数组维度定义迷思

class sdata;
  bit [255:0] data [2048];
  rand int     data_t [2048][32];
  rand bit       mask [2048][32];
  bit flag;

  constraint c {
      foreach (data_t[i,j]) data_t[i][j]< 5;
      foreach (data_t[i,j]) data_t[i][j]>-5;
  }

  function void post_randomize();
    if (flag) begin
      for (int i = 0; i < 2048; i++) begin
        for (int j = 0; j < 32; j++) begin
          data[i][8*j+:8]=data_t[i][j]*mask[i][j];
        end
      end
    end
  endfunction

endclass : sdata

bit [255:0] mem_fmap_in [2048];

reg [`FMAP_MEM_WD-1:0] ram [`FMAP_MEM_DEP-1:0];

sdata temp;

void'(temp.randomize());

mem_fmap_in=temp.data;
i_fmap_mem_in.ram=temp.data;

$writememh("fmap_in.txt",i_fmap_mem_in.ram);
$writememh("fmap_in_s.txt",mem_fmap_in);

for (int i = 0; i < 2048; i++) begin
    mem_fmap_in[i]=temp.data[i];
    i_fmap_mem_in.ram[i]=temp.data[i];
end

bit [255:0] mem_fmap_in [2047：0];
reg [`FMAP_MEM_WD-1:0] ram [`FMAP_MEM_DEP-1:0];

bit [255:0] mem_fmap_in [2048];
reg [`FMAP_MEM_WD-1:0] ram [`FMAP_MEM_DEP];

bit [255:0] mem_fmap_in [2048];
reg [`FMAP_MEM_WD-1:0] ram [0:`FMAP_MEM_DEP-1];

module tb ();

int a [3];
int b [2:0];
int c [0:2];
int d [3];

  initial begin
    for (int i = 0;i<3 ;i++ ) begin
      a[i]=i;
    end
    b=a;
    c=a;
    d=a;
    for (int i = 0;i<3 ;i++ ) begin
      $display("a[%0d]:%0d b[%0d]:%0d c[%0d]:%0d d[%0d]:%0d",i,a[i],i,b[i],i,c[i],i,d[i]);
    end
  end

endmodule

a[0]:0 b[0]:2 c[0]:0 d[0]:0
a[1]:1 b[1]:1 c[1]:1 d[1]:1
a[2]:2 b[2]:0 c[2]:2 d[2]:2