Difference between revisions of "Accessing and evaluating module's parameters"

Latest revision as of 12:14, 27 July 2021

#include "Map.h"
#include "Array.h"
#include "Strings.h"
#include "veri_file.h"
#include "VeriBaseValue_Stat.h"
#include "VeriModule.h"
#include "VeriExpression.h"
#include "VeriId.h"
#include "RuntimeFlags.h"

#ifdef VERIFIC_NAMESPACE
using namespace Verific ;
#endif

int main(int argc, char **argv)
{
    const char *file = (argc > 1) ? argv[1] : "test.v" ;
    if (!veri_file::Analyze(file, veri_file::SYSTEM_VERILOG)) return 1 ;

    // If you want to replace constant expressions during static elaboration
    // RuntimeFlags::SetVar("veri_replace_const_exprs", 1) ;

    // If you want to run static elaboration
    veri_file::ElaborateAllStatic() ;

    MapIter mi ;
    VeriModule *mod ;
    FOREACH_VERILOG_MODULE(mi, mod) {
        Message::PrintLine("module: ", mod->Name()) ;
        Array *module_items = mod->GetModuleItems() ;
        VeriModuleItem *module_item ;
        unsigned i ;
        FOREACH_ARRAY_ITEM (module_items, i, module_item) {
            if (!module_item) continue ;
            if (!(module_item->IsParamDecl()) && !(module_item->IsLocalParamDecl())) continue ;
            VeriDataDecl * param_decl = static_cast<VeriDataDecl *>(module_item) ;
            /*
            VeriDataType *data_type = param_decl->GetDataType() ;
            if (data_type) {
                Message::PrintLine("    data type: ", data_type->GetPrettyPrintedString()) ;
            }
            */
            Array *param_array = param_decl->GetIds() ;
            VeriIdDef *param ;
            unsigned i ;
            FOREACH_ARRAY_ITEM (param_array, i, param) {
                if (!param) continue ;
                if (module_item->IsParamDecl()) {
                    Message::PrintLine("    param: ", param->Name()) ;
                }
                if (module_item->IsLocalParamDecl()) {
                    Message::PrintLine("    local param: ", param->Name()) ;
                }
                VeriExpression *initial_expr = param->GetInitialValue() ;
                if (initial_expr) {
                    Message::PrintLine("        initial expression: ", initial_expr->GetPrettyPrintedString()) ;
                    VeriBaseValue *val = initial_expr->StaticEvaluate(0, 0) ;
                    int int_val = val ? val->GetIntegerValue() : 0 ;
                    Message::PrintLine("        initial value: ", Strings::itoa(int_val)) ;
                }
            }
        }
    }
    return 0 ;
}
 

$ cat test.v
module leaf(bus);
  parameter PARAMLEAF = 1;
  localparam PARAMLEAFLOCAL = PARAMLEAF+PARAMLEAF-1+2;
  input [PARAMLEAF-1:0] bus;
endmodule

module top();
  parameter TOPP = 3;
  localparam TOPL = 4;

  leaf leaf1();
  leaf #(.PARAMLEAF(2)) leaf2();
  leaf #(.PARAMLEAF(TOPP)) leaf3();
  leaf #(.PARAMLEAF(TOPL+2)) leaf6();
endmodule

$ test-linux
-- Analyzing Verilog file 'test.v' (VERI-1482)
test.v(7): INFO: compiling module 'top' (VERI-1018)
test.v(11): WARNING: port 'bus' is not connected on this instance (VERI-2435)
test.v(12): WARNING: port 'bus' is not connected on this instance (VERI-2435)
test.v(13): WARNING: port 'bus' is not connected on this instance (VERI-2435)
test.v(14): WARNING: port 'bus' is not connected on this instance (VERI-2435)
-- module: leaf
--     param: PARAMLEAF
--         initial expression: 1
--         initial value: 1
--     local param: PARAMLEAFLOCAL
--         initial expression: (((PARAMLEAF + PARAMLEAF) - 1) + 2)
--         initial value: 3
-- module: top
--     param: TOPP
--         initial expression: 3
--         initial value: 3
--     local param: TOPL
--         initial expression: 4
--         initial value: 4
-- module: leaf_default
--     param: PARAMLEAF
--         initial expression: 1
--         initial value: 1
--     local param: PARAMLEAFLOCAL
--         initial expression: (((PARAMLEAF + PARAMLEAF) - 1) + 2)
--         initial value: 3
-- module: leaf(PARAMLEAF=2)
--     param: PARAMLEAF
--         initial expression: 2
--         initial value: 2
--     local param: PARAMLEAFLOCAL
--         initial expression: (((PARAMLEAF + PARAMLEAF) - 1) + 2)
--         initial value: 5
-- module: leaf(PARAMLEAF=3)
--     param: PARAMLEAF
--         initial expression: 3
--         initial value: 3
--     local param: PARAMLEAFLOCAL
--         initial expression: (((PARAMLEAF + PARAMLEAF) - 1) + 2)
--         initial value: 7
-- module: leaf(PARAMLEAF=6)
--     param: PARAMLEAF
--         initial expression: 6
--         initial value: 6
--     local param: PARAMLEAFLOCAL
--         initial expression: (((PARAMLEAF + PARAMLEAF) - 1) + 2)
--         initial value: 13

$