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Generate code for while statements.

This commit is contained in:
steve 2001-04-01 06:49:04 +00:00
parent ae1d5227de
commit 2443c655f2
1 changed files with 37 additions and 2 deletions
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39
tgt-vvp/vvp_process.c
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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 1.16 2001/04/01 04:34:59 steve Exp $"
#ident "$Id: vvp_process.c,v 1.17 2001/04/01 06:49:04 steve Exp $"
#endif
# include "vvp_priv.h"
@ -343,6 +343,34 @@ static int show_stmt_wait(ivl_statement_t net)
return show_statement(ivl_stmt_sub_stmt(net));
}
static int show_stmt_while(ivl_statement_t net)
{
int rc = 0;
struct vector_info cvec;
unsigned top_label = local_count++;
unsigned out_label = local_count++;
fprintf(vvp_out, "T_%d.%d\n", thread_count, top_label);
/* Draw the evaluation of the condition expression, and test
the result. If the expression evaluates to false, then
branch to the out label. */
cvec = draw_eval_expr(ivl_stmt_cond_expr(net));
fprintf(vvp_out, " %%jmp/0xz T_%d.%d, %u;\n",
thread_count, out_label, cvec.base);
clr_vector(cvec);
/* Draw the body of the loop. */
rc += show_statement(ivl_stmt_sub_stmt(net));
/* This is the bottom of the loop. branch to the top where the
test is repeased, and also draw the out label. */
fprintf(vvp_out, " %%jmp T_%d.%d;\n", thread_count, top_label);
fprintf(vvp_out, "T_%d.%d\n", thread_count, out_label);
return rc;
}
static int show_system_task_call(ivl_statement_t net)
{
unsigned idx;
@ -443,6 +471,10 @@ static int show_statement(ivl_statement_t net)
rc += show_stmt_wait(net);
break;
case IVL_ST_WHILE:
rc += show_stmt_while(net);
break;
default:
fprintf(stderr, "vvp.tgt: Unable to draw statement type %u\n",
code);
@ -471,7 +503,7 @@ int draw_process(ivl_process_t net, void*x)
/* Generate the entry label. Just give the thread a number so
that we ar certain the label is unique. */
fprintf(vvp_out, "T_%d\n", thread_count);
fprintf(vvp_out, "T_%d ;\n", thread_count);
/* Draw the contents of the thread. */
rc += show_statement(stmt);
@ -502,6 +534,9 @@ int draw_process(ivl_process_t net, void*x)
/*
* $Log: vvp_process.c,v $
* Revision 1.17 2001/04/01 06:49:04 steve
* Generate code for while statements.
*
* Revision 1.16 2001/04/01 04:34:59 steve
* Generate code for casex and casez
*