Fix vpi_control operation codes to be standard

Apparently, the vpi_user.h definitions for vpiStop et al were added
before they were standardized by 1364-2000, and never corrected.
Change the values to be standard. (Submitted by Matt Trostel.)

I also added some binary compatibility for existing .vpi modules
that were compiled with the older constant values.

vpi_user.h

@@ -469,10 +469,13 @@ extern PLI_INT32 vpi_remove_cb(vpiHandle ref);
  * vpiSetInteractiveScope -
  */
 extern void vpi_control(PLI_INT32 operation, ...);
-#define vpiStop 1
+/************* vpi_control() constants (added with 1364-2000) *************/
-#define vpiFinish 2
+#define vpiStop                66  /* execute simulator's $stop */
-#define vpiReset  3
+#define vpiFinish              67  /* execute simulator's $finish */
-#define vpiSetInteractiveScope 4
+#define vpiReset               68  /* execute simulator's $reset */
+#define vpiSetInteractiveScope 69  /* set simulator's interactive scope */
+#define __ivl_legacy_vpiStop 1
+#define __ivl_legacy_vpiFinish 2
 
 /* vpi_sim_control is the incorrect name for vpi_control. */
 extern void vpi_sim_control(PLI_INT32 operation, ...);

vvp/vpi_priv.cc

@@ -203,6 +203,8 @@ static const char* vpi_property_str(PLI_INT32 code)
 	    return "vpiTimeUnit";
 	  case vpiTimePrecision:
 	    return "vpiTimePrecision";
+          case vpiSize:
+	    return "vpiSize";
 	  default:
 	    sprintf(buf, "%d", code);
       }
@@ -1192,11 +1194,13 @@ extern "C" void vpi_sim_vcontrol(int operation, va_list ap)
 
       switch (operation) {
 	  case vpiFinish:
+	  case __ivl_legacy_vpiFinish:
             diag_msg = va_arg(ap, long);
 	    schedule_finish(diag_msg);
 	    break;
 
 	  case vpiStop:
+	  case __ivl_legacy_vpiStop:
             diag_msg = va_arg(ap, long);
 	    schedule_stop(diag_msg);
 	    break;