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Add support for synthesis translate meta-comments.

This commit is contained in:
Stephen Williams 2014-07-15 18:03:40 -07:00
parent b991a991a7
commit 14f597acdd
4 changed files with 36 additions and 2 deletions
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7
lexor.lex
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@ -134,9 +134,12 @@ TU [munpf]
\n { yylloc.first_line += 1; }
/* C++ style comments start with / / and run to the end of the
current line. These are very easy to handle. */
current line. These are very easy to handle. The meta-comments
format is a little more tricky to handle, but do what we can. */
"//".* { comment_enter = YY_START; BEGIN(LCOMMENT); }
"//"{W}*"synthesis"{W}*"translate_on"{W}*\n { return K_MC_TRANSLATE_ON; }
"//"{W}*"synthesis"{W}*"translate_off"{W}*\n { return K_MC_TRANSLATE_OFF; }
"//" { comment_enter = YY_START; BEGIN(LCOMMENT); }
<LCOMMENT>. { yymore(); }
<LCOMMENT>\n { yylloc.first_line += 1; BEGIN(comment_enter); }

9
parse.y
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@ -532,6 +532,8 @@ static void current_function_set_statement(const YYLTYPE&loc, vector<Statement*>
%token K_resolveto K_sin K_sinh K_slew K_split K_sqrt K_tan K_tanh
%token K_timer K_transition K_units K_white_noise K_wreal
%token K_zi_nd K_zi_np K_zi_zd K_zi_zp
/* Support some meta-comments as pragmas. */
%token K_MC_TRANSLATE_ON K_MC_TRANSLATE_OFF
%type <flag> from_exclude
%type <number> number pos_neg_number
@ -4246,6 +4248,13 @@ module_item
/* Modules can contain further sub-module definitions. */
: module
/* The lexor detects "// synthesis translate_on/off" meta-comments,
we handle them here by turning on/off a flag. The pform uses
that flag to attach implicit attributes to "initial" and
"always" statements. */
| K_MC_TRANSLATE_OFF { pform_mc_translate_on(false); }
| K_MC_TRANSLATE_ON { pform_mc_translate_on(true); }
| attribute_list_opt net_type data_type_or_implicit delay3_opt net_variable_list ';'
{ data_type_t*data_type = $3;

21
pform.cc
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@ -43,6 +43,15 @@
# include "ivl_assert.h"
# include "ivl_alloc.h"
/*
* The "// synthesis translate_on/off" meta-comments cause this flag
* to be turned off or on. The pform_make_behavior and similar
* functions look at this flag and may choose to add implicit ivl
* synthesis flags.
*/
static bool pform_mc_translate_flag = true;
void pform_mc_translate_on(bool flag) { pform_mc_translate_flag = flag; }
/*
* The pform_modules is a map of the modules that have been defined in
* the top level. This should not contain nested modules/programs.
@ -3197,6 +3206,18 @@ PProcess* pform_make_behavior(ivl_process_type_t type, Statement*st,
{
PProcess*pp = new PProcess(type, st);
// If we are in a part of the code where the meta-comment
// synthesis translate_off is in effect, then implicitly add
// the ivl_synthesis_off attribute to any behavioral code that
// we run into.
if (pform_mc_translate_flag == false) {
if (attr == 0) attr = new list<named_pexpr_t>;
named_pexpr_t tmp;
tmp.name = perm_string::literal("ivl_synthesis_off");
tmp.parm = 0;
attr->push_back(tmp);
}
pform_bind_attributes(pp->attributes, attr);
pform_put_behavior_in_scope(pp);

1
pform.h
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@ -406,6 +406,7 @@ extern void pform_module_specify_path(PSpecPath*obj);
*/
extern PProcess* pform_make_behavior(ivl_process_type_t, Statement*,
list<named_pexpr_t>*attr);
extern void pform_mc_translate_on(bool flag);
extern std::vector<PWire*>* pform_make_udp_input_ports(list<perm_string>*);