From bb3439562e122d3a0d8d0e8cd1179d1e478807ea Mon Sep 17 00:00:00 2001
From: Tom Verbeure <hombre+github@gmail.com>
Date: Mon, 4 Jan 2021 00:11:01 -0800
Subject: [PATCH 1/2] Add -nosynthesis flag for read_verilog command.
---
frontends/verilog/verilog_frontend.cc | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/frontends/verilog/verilog_frontend.cc b/frontends/verilog/verilog_frontend.cc
index 5319a45ad..7f7d77477 100644
--- a/frontends/verilog/verilog_frontend.cc
+++ b/frontends/verilog/verilog_frontend.cc
@@ -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);
From 3a8eecebbad01f2a73ddf4efd0949b9ba5684506 Mon Sep 17 00:00:00 2001
From: Tom Verbeure <hombre+github@gmail.com>
Date: Mon, 4 Jan 2021 00:17:16 -0800
Subject: [PATCH 2/2] Fix indents.
---
frontends/verilog/verilog_frontend.cc | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/frontends/verilog/verilog_frontend.cc b/frontends/verilog/verilog_frontend.cc
index 7f7d77477..e2aecd99b 100644
--- a/frontends/verilog/verilog_frontend.cc
+++ b/frontends/verilog/verilog_frontend.cc
@@ -229,7 +229,7 @@ struct VerilogFrontend : public Frontend {
log("\n");
log("Depending on if read_verilog is run in -formal mode, either the macro\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("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");
@@ -258,7 +258,7 @@ struct VerilogFrontend : public Frontend {
bool flag_defer = false;
bool flag_noblackbox = false;
bool flag_nowb = false;
- bool flag_nosynthesis = false;
+ bool flag_nosynthesis = false;
define_map_t defines_map;
std::list<std::string> include_dirs;