Re: [Iverilog-devel] How to get more information when internal errors happen

[Uwe B. <bo...@el...>]

>>>>> "Cary" == Cary R <cy...@ya...> writes:

    Cary> --- Uwe Bonnes <bo...@el...> wrote:
    >> I can see: v0xa16a2a0_0 .net *"_s273", -1 0, L_0xc4250c0; 1 drivers

    Cary> I think you are reading this line incorrectly. The .net definition
    Cary> is located in vvp/README.txt. You are correct this is a temporary
Hallo Cary,

trying to read like you proposed, I think here are some more or less
relevant lines. The first number is the line number in the a.out file:

  13340 v0xbf41b18_0 .net "BU1155_Q", 4 0, L_0xc1264c8; 1 drivers

  15245 RS_0xbace0f0 .resolv tri, L_0xc414290, L_0xc4142e0, L_0xc414330, L_0xc4143d0;

  17963 L_0xc414290 .part/pv L_0xc11c4b0, 0, 1, 4;
  17964 L_0xc4142e0 .part/pv L_0xc11c550, 1, 1, 4;
  17965 L_0xc414330 .part/pv L_0xc1261d0, 2, 1, 4;
  17966 L_0xc4143d0 .part/pv L_0xc126220, 3, 1, 4;
  
  17181 L_0xc11c4b0 .part L_0xc1264c8, 0, 1;
  17182 L_0xc11c550 .part L_0xc1264c8, 1, 1;
  17183 L_0xc1261d0 .part L_0xc1264c8, 2, 1;
  17184 L_0xc126220 .part L_0xc1264c8, 3, 1;
  17185 L_0xc1262e8 .part L_0xc1264c8, 4, 1;

347865 v0xa16a440_0 .net *"_s273", -1 0, L_0xc4251b8; 1 drivers

348015 L_0xc425280 .concat [ 4 2 0 0], C4<0000>, L_0xc4251b8;
348016 L_0xc4251b8 .part RS_0xbace0f0, 0, 0;
 
The last line with the part select with width 0 seems fishy. 

BU1155_Q is the Q of an  C_ADDSUB_V7_0 invocation:

      wire [4 : 0] BU1155_Q;
         assign n7927 = BU1155_Q[0];
         assign n7926 = BU1155_Q[1];
         assign n7925 = BU1155_Q[2];
         assign n7924 = BU1155_Q[3];
         assign n8091 = BU1155_Q[4];
that is fed back into the adder:
      wire [4 : 0] BU1155_A;
         assign BU1155_A[0] = n7927;
         assign BU1155_A[1] = n7926;
         assign BU1155_A[2] = n7925;
         assign BU1155_A[3] = n7924;
         assign BU1155_A[4] = n8091;
and goes to a C_REG_FD_V7_0:
      wire [4 : 0] BU1189_D;
         assign BU1189_D[0] = n7927;
         assign BU1189_D[1] = n7926;
         assign BU1189_D[2] = n7925;
         assign BU1189_D[3] = n7924;
         assign BU1189_D[4] = n8091;

At the moment nor more ideas...

Bye


-- 
Uwe Bonnes                bo...@el...

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------