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Add -nosynthesis flag for read_verilog command.

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This commit is contained in:
Tom Verbeure 2021-01-04 00:11:01 -08:00
parent b72c294653
commit bb3439562e
1 changed files with 12 additions and 3 deletions
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15
frontends/verilog/verilog_frontend.cc
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@ -84,6 +84,9 @@ struct VerilogFrontend : public Frontend {
log(" enable support for SystemVerilog assertions and some Yosys extensions\n");
log(" replace the implicit -D SYNTHESIS with -D FORMAL\n");
log("\n");
log(" -nosynthesis\n");
log(" don't add implicit -D SYNTHESIS\n");
log("\n");
log(" -noassert\n");
log(" ignore assert() statements\n");
log("\n");
@ -225,8 +228,8 @@ struct VerilogFrontend : public Frontend {
log("the syntax of the code, rather than to rely on read_verilog for that.\n");
log("\n");
log("Depending on if read_verilog is run in -formal mode, either the macro\n");
log("SYNTHESIS or FORMAL is defined automatically. In addition, read_verilog\n");
log("always defines the macro YOSYS.\n");
log("SYNTHESIS or FORMAL is defined automatically, unless -nosynthesis is used.\n");
log("In addition, read_verilog always defines the macro YOSYS.\n");
log("\n");
log("See the Yosys README file for a list of non-standard Verilog features\n");
log("supported by the Yosys Verilog front-end.\n");
@ -255,6 +258,7 @@ struct VerilogFrontend : public Frontend {
bool flag_defer = false;
bool flag_noblackbox = false;
bool flag_nowb = false;
bool flag_nosynthesis = false;
define_map_t defines_map;
std::list<std::string> include_dirs;
@ -282,6 +286,10 @@ struct VerilogFrontend : public Frontend {
formal_mode = true;
continue;
}
if (arg == "-nosynthesis") {
flag_nosynthesis = true;
continue;
}
if (arg == "-noassert") {
noassert_mode = true;
continue;
@ -447,7 +455,8 @@ struct VerilogFrontend : public Frontend {
break;
}
defines_map.add(formal_mode ? "FORMAL" : "SYNTHESIS", "1");
if (formal_mode || !flag_nosynthesis)
defines_map.add(formal_mode ? "FORMAL" : "SYNTHESIS", "1");
extra_args(f, filename, args, argidx);