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Optionally suppress output from display system tasks in read_verilog

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This commit is contained in:
Dag Lem 2024-01-11 10:32:44 +01:00
parent 510d137996
commit 3ed9030eb4
4 changed files with 35 additions and 27 deletions
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5
frontends/ast/ast.cc
View file

@ -45,7 +45,7 @@ namespace AST {
// instantiate global variables (private API)
namespace AST_INTERNAL {
bool flag_dump_ast1, flag_dump_ast2, flag_no_dump_ptr, flag_dump_vlog1, flag_dump_vlog2, flag_dump_rtlil, flag_nolatches, flag_nomeminit;
bool flag_nodisplay, flag_dump_ast1, flag_dump_ast2, flag_no_dump_ptr, flag_dump_vlog1, flag_dump_vlog2, flag_dump_rtlil, flag_nolatches, flag_nomeminit;
bool flag_nomem2reg, flag_mem2reg, flag_noblackbox, flag_lib, flag_nowb, flag_noopt, flag_icells, flag_pwires, flag_autowire;
AstNode *current_ast, *current_ast_mod;
std::map<std::string, AstNode*> current_scope;
@ -1320,11 +1320,12 @@ static void rename_in_package_stmts(AstNode *pkg)
}
// create AstModule instances for all modules in the AST tree and add them to 'design'
void AST::process(RTLIL::Design *design, AstNode *ast, bool dump_ast1, bool dump_ast2, bool no_dump_ptr, bool dump_vlog1, bool dump_vlog2, bool dump_rtlil,
void AST::process(RTLIL::Design *design, AstNode *ast, bool nodisplay, bool dump_ast1, bool dump_ast2, bool no_dump_ptr, bool dump_vlog1, bool dump_vlog2, bool dump_rtlil,
bool nolatches, bool nomeminit, bool nomem2reg, bool mem2reg, bool noblackbox, bool lib, bool nowb, bool noopt, bool icells, bool pwires, bool nooverwrite, bool overwrite, bool defer, bool autowire)
{
current_ast = ast;
current_ast_mod = nullptr;
flag_nodisplay = nodisplay;
flag_dump_ast1 = dump_ast1;
flag_dump_ast2 = dump_ast2;
flag_no_dump_ptr = no_dump_ptr;

4
frontends/ast/ast.h
View file

@ -376,7 +376,7 @@ namespace AST
};
// process an AST tree (ast must point to an AST_DESIGN node) and generate RTLIL code
void process(RTLIL::Design *design, AstNode *ast, bool dump_ast1, bool dump_ast2, bool no_dump_ptr, bool dump_vlog1, bool dump_vlog2, bool dump_rtlil, bool nolatches, bool nomeminit,
void process(RTLIL::Design *design, AstNode *ast, bool nodisplay, bool dump_ast1, bool dump_ast2, bool no_dump_ptr, bool dump_vlog1, bool dump_vlog2, bool dump_rtlil, bool nolatches, bool nomeminit,
bool nomem2reg, bool mem2reg, bool noblackbox, bool lib, bool nowb, bool noopt, bool icells, bool pwires, bool nooverwrite, bool overwrite, bool defer, bool autowire);
// parametric modules are supported directly by the AST library
@ -432,7 +432,7 @@ namespace AST
namespace AST_INTERNAL
{
// internal state variables
extern bool flag_dump_ast1, flag_dump_ast2, flag_no_dump_ptr, flag_dump_rtlil, flag_nolatches, flag_nomeminit;
extern bool flag_nodisplay, flag_dump_ast1, flag_dump_ast2, flag_no_dump_ptr, flag_dump_rtlil, flag_nolatches, flag_nomeminit;
extern bool flag_nomem2reg, flag_mem2reg, flag_lib, flag_noopt, flag_icells, flag_pwires, flag_autowire;
extern AST::AstNode *current_ast, *current_ast_mod;
extern std::map<std::string, AST::AstNode*> current_scope;

42
frontends/ast/simplify.cc
View file

@ -1058,33 +1058,31 @@ bool AstNode::simplify(bool const_fold, int stage, int width_hint, bool sign_hin
{
if (!current_always) {
log_file_warning(filename, location.first_line, "System task `%s' outside initial or always block is unsupported.\n", str.c_str());
} else if (current_always->type == AST_INITIAL) {
int default_base = 10;
if (str.back() == 'b')
default_base = 2;
else if (str.back() == 'o')
default_base = 8;
else if (str.back() == 'h')
default_base = 16;
// when $display()/$write() functions are used in an initial block, print them during synthesis
Fmt fmt = processFormat(stage, /*sformat_like=*/false, default_base, /*first_arg_at=*/0, /*may_fail=*/true);
if (str.substr(0, 8) == "$display")
fmt.append_string("\n");
log("%s", fmt.render().c_str());
for (auto node : children)
while (node->simplify(true, stage, -1, false)) {}
return false;
delete_children();
str = std::string();
} else {
// when $display()/$write() functions are used in an always block, simplify the expressions and
// convert them to a special cell later in genrtlil
// simplify the expressions and convert them to a special cell later in genrtlil
for (auto node : children)
while (node->simplify(true, stage, -1, false)) {}
if (current_always->type == AST_INITIAL && !flag_nodisplay && stage == 2) {
int default_base = 10;
if (str.back() == 'b')
default_base = 2;
else if (str.back() == 'o')
default_base = 8;
else if (str.back() == 'h')
default_base = 16;
// when $display()/$write() functions are used in an initial block, print them during synthesis
Fmt fmt = processFormat(stage, /*sformat_like=*/false, default_base, /*first_arg_at=*/0, /*may_fail=*/true);
if (str.substr(0, 8) == "$display")
fmt.append_string("\n");
log("%s", fmt.render().c_str());
}
return false;
}
delete_children();
str = std::string();
}
// activate const folding if this is anything that must be evaluated statically (ranges, parameters, attributes, etc.)