SV 之 关联数组
module coarr;
bit[63:0] rom[bit[63:0]] ; // 构建关联数组
bit[63:0] idx ; // 相对应的索引
function automatic void print(bit[63:0] pos, ref bit[63:0] rom[bit[63:0]]);
$display(" rom[%d] = %d ",pos,rom[pos]);
endfunction:print
initial begin
idx = 1 ;
repeat(64) begin // 对关联数组初始化，但实际上只存储了64个值
rom[idx] = idx ;
idx = idx << 1 ;
end
if( rom.first(idx)) begin // 找到第一个索引的位置
print(idx,rom);
while( rom.next(idx) ) print(idx,rom); // 找到之后的索引的位置
end
end
endmodule:coarr
仿真结果：
# rom[ 1] = 1
# rom[ 2] = 2
# rom[ 4] = 4
# rom[ 8] = 8
# rom[ 16] = 16
# rom[ 32] = 32
# rom[ 64] = 64
# rom[ 128] = 128
# rom[ 256] = 256
# rom[ 512] = 512
# rom[ 1024] = 1024
# rom[ 2048] = 2048
# rom[ 4096] = 4096
# rom[ 8192] = 8192
# rom[ 16384] = 16384
# rom[ 32768] = 32768
# rom[ 65536] = 65536
# rom[ 131072] = 131072
# rom[ 262144] = 262144
# rom[ 524288] = 524288
# rom[ 1048576] = 1048576
# rom[ 2097152] = 2097152
# rom[ 4194304] = 4194304
# rom[ 8388608] = 8388608
# rom[ 16777216] = 16777216
# rom[ 33554432] = 33554432
# rom[ 67108864] = 67108864
# rom[ 134217728] = 134217728
# rom[ 268435456] = 268435456
# rom[ 536870912] = 536870912
# rom[ 1073741824] = 1073741824
# rom[ 2147483648] = 2147483648
# rom[ 4294967296] = 4294967296
# rom[ 8589934592] = 8589934592
# rom[ 17179869184] = 17179869184
# rom[ 34359738368] = 34359738368
# rom[ 68719476736] = 68719476736
# rom[ 137438953472] = 137438953472
# rom[ 274877906944] = 274877906944
# rom[ 549755813888] = 549755813888
# rom[ 1099511627776] = 1099511627776
# rom[ 2199023255552] = 2199023255552
# rom[ 4398046511104] = 4398046511104
# rom[ 8796093022208] = 8796093022208
# rom[ 17592186044416] = 17592186044416
# rom[ 35184372088832] = 35184372088832
# rom[ 70368744177664] = 70368744177664
# rom[ 140737488355328] = 140737488355328
# rom[ 281474976710656] = 281474976710656
# rom[ 562949953421312] = 562949953421312
# rom[ 1125899906842624] = 1125899906842624
# rom[ 2251799813685248] = 2251799813685248
# rom[ 4503599627370496] = 4503599627370496
# rom[ 9007199254740992] = 9007199254740992
# rom[ 18014398509481984] = 18014398509481984
# rom[ 36028797018963968] = 36028797018963968
# rom[ 72057594037927936] = 72057594037927936
# rom[ 144115188075855872] = 144115188075855872
# rom[ 288230376151711744] = 288230376151711744
# rom[ 576460752303423488] = 576460752303423488
# rom[ 1152921504606846976] = 1152921504606846976
# rom[ 2305843009213693952] = 2305843009213693952
# rom[ 4611686018427387904] = 4611686018427387904
# rom[ 9223372036854775808] = 9223372036854775808
