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Add "whitebox" attribute, add "read_verilog -wb"

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Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2019-04-18 17:42:12 +02:00
parent ea8ac0aaad
commit f4abc21d8a
23 changed files with 81 additions and 42 deletions
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14
frontends/verilog/verilog_frontend.cc
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@ -148,6 +148,10 @@ struct VerilogFrontend : public Frontend {
log(" -lib\n");
log(" only create empty blackbox modules. This implies -DBLACKBOX.\n");
log("\n");
log(" -wb\n");
log(" like -lib, except do not touch modules with the whitebox\n");
log(" attribute set. This also implies -DBLACKBOX.\n");
log("\n");
log(" -noopt\n");
log(" don't perform basic optimizations (such as const folding) in the\n");
log(" high-level front-end.\n");
@ -228,6 +232,7 @@ struct VerilogFrontend : public Frontend {
norestrict_mode = false;
assume_asserts_mode = false;
lib_mode = false;
wb_mode = false;
default_nettype_wire = true;
log_header(design, "Executing Verilog-2005 frontend.\n");
@ -329,11 +334,16 @@ struct VerilogFrontend : public Frontend {
flag_nodpi = true;
continue;
}
if (arg == "-lib") {
if (arg == "-lib" && !wb_mode) {
lib_mode = true;
defines_map["BLACKBOX"] = string();
continue;
}
if (arg == "-wb" && !lib_mode) {
wb_mode = true;
defines_map["BLACKBOX"] = string();
continue;
}
if (arg == "-noopt") {
flag_noopt = true;
continue;
@ -429,7 +439,7 @@ struct VerilogFrontend : public Frontend {
if (flag_nodpi)
error_on_dpi_function(current_ast);
AST::process(design, current_ast, flag_dump_ast1, flag_dump_ast2, flag_no_dump_ptr, flag_dump_vlog1, flag_dump_vlog2, flag_dump_rtlil, flag_nolatches, flag_nomeminit, flag_nomem2reg, flag_mem2reg, lib_mode, flag_noopt, flag_icells, flag_nooverwrite, flag_overwrite, flag_defer, default_nettype_wire);
AST::process(design, current_ast, flag_dump_ast1, flag_dump_ast2, flag_no_dump_ptr, flag_dump_vlog1, flag_dump_vlog2, flag_dump_rtlil, flag_nolatches, flag_nomeminit, flag_nomem2reg, flag_mem2reg, lib_mode, wb_mode, flag_noopt, flag_icells, flag_nooverwrite, flag_overwrite, flag_defer, default_nettype_wire);
if (!flag_nopp)
delete lexin;