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Support calculated delays in vvp.tgt.

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steve
2001-07-19 04:55:06 +00:00
parent e773ccfe49
commit cd8e491028
5 changed files with 61 additions and 8 deletions
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tgt-vvp/vvp_process.c
+31 -1
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@@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT)
#ident "$Id: vvp_process.c,v 1.38 2001/06/29 02:41:05 steve Exp $"
#ident "$Id: vvp_process.c,v 1.39 2001/07/19 04:55:06 steve Exp $"
#endif
# include "vvp_priv.h"
@@ -453,6 +453,29 @@ static int show_stmt_delay(ivl_statement_t net, ivl_scope_t sscope)
return rc;
}
/*
* The delayx statement is slightly more complex in that it is
* necessary to calculate the delay first. Load the calculated delay
* into and index register and use the %delayx instruction to do the
* actual delay.
*/
static int show_stmt_delayx(ivl_statement_t net, ivl_scope_t sscope)
{
int rc = 0;
ivl_expr_t exp = ivl_stmt_delay_expr(net);
ivl_statement_t stmt = ivl_stmt_sub_stmt(net);
{ struct vector_info del = draw_eval_expr(exp);
fprintf(vvp_out, " %%ix/get 0, %u, %u;\n", del.base, del.wid);
clr_vector(del);
}
fprintf(vvp_out, " %%delayx 0;\n");
rc += show_statement(stmt, sscope);
return rc;
}
static int show_stmt_disable(ivl_statement_t net, ivl_scope_t sscope)
{
int rc = 0;
@@ -755,6 +778,10 @@ static int show_statement(ivl_statement_t net, ivl_scope_t sscope)
rc += show_stmt_delay(net, sscope);
break;
case IVL_ST_DELAYX:
rc += show_stmt_delayx(net, sscope);
break;
case IVL_ST_DISABLE:
rc += show_stmt_disable(net, sscope);
break;
@@ -887,6 +914,9 @@ int draw_func_definition(ivl_scope_t scope)
/*
* $Log: vvp_process.c,v $
* Revision 1.39 2001/07/19 04:55:06 steve
* Support calculated delays in vvp.tgt.
*
* Revision 1.38 2001/06/29 02:41:05 steve
* Handle null parameters to system tasks.
*