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/*
* Copyright (C) 2012-2021 Martin Whitaker. (icarus@martin-whitaker.me.uk)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "sys_priv.h"
#include <assert.h>
#include <inttypes.h>
#include <stdlib.h>
#include "ivl_alloc.h"
/*
* Check to see if an argument is a single bit net.
*/
static void check_net_arg(vpiHandle arg, vpiHandle callh, const char *name)
{
assert(arg);
switch (vpi_get(vpiType, arg)) {
case vpiPartSelect:
if (vpi_get(vpiType, vpi_handle(vpiParent, arg)) != vpiNet)
break;
// fallthrough
case vpiNet:
if (vpi_get(vpiSize, arg) != 1)
break;
return;
default:
break;
}
vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
(int)vpi_get(vpiLineNo, callh));
vpi_printf("%s's first argument must be a scalar net or "
"a bit-select of a vector net.\n", name);
vpip_set_return_value(1);
vpi_control(vpiFinish, 1);
}
/*
* Check to see if an argument is a variable.
*/
static void check_var_arg(vpiHandle arg, vpiHandle callh, const char *name,
const char *arg_name)
{
assert(arg);
switch (vpi_get(vpiType, arg)) {
case vpiPartSelect:
if (vpi_get(vpiType, vpi_handle(vpiParent, arg)) == vpiNet)
break;
case vpiMemoryWord:
case vpiBitVar:
case vpiReg:
case vpiIntegerVar:
case vpiIntVar:
case vpiLongIntVar:
case vpiTimeVar:
return;
default:
break;
}
vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
(int)vpi_get(vpiLineNo, callh));
vpi_printf("%s's %s argument must be a variable.\n",
name, arg_name);
vpip_set_return_value(1);
vpi_control(vpiFinish, 1);
}
static PLI_INT32 sys_countdrivers_sizetf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
(void)name; /* Parameter is not used. */
return 1;
}
/*
* Check that the given $countdrivers() call has valid arguments.
*/
static PLI_INT32 sys_countdrivers_compiletf(ICARUS_VPI_CONST PLI_BYTE8 *name)
{
vpiHandle callh = vpi_handle(vpiSysTfCall, 0);
vpiHandle argv = vpi_iterate(vpiArgument, callh);
vpiHandle arg;
unsigned arg_num;
/* Check that there are arguments. */
if (argv == 0) {
vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
(int)vpi_get(vpiLineNo, callh));
vpi_printf("%s requires at least one argument.\n", name);
vpip_set_return_value(1);
vpi_control(vpiFinish, 1);
return 0;
}
/* The first argument must be a scalar net or a net bit select. */
arg = vpi_scan(argv);
check_net_arg(arg, callh, name);
/* The optional arguments must be variables. */
for (arg_num = 2; arg_num < 7; arg_num += 1) {
const char *arg_name = NULL;
switch (arg_num) {
case 2: arg_name = "second"; break;
case 3: arg_name = "third"; break;
case 4: arg_name = "fourth"; break;
case 5: arg_name = "fifth"; break;
case 6: arg_name = "sixth"; break;
default: assert(0);
}
arg = vpi_scan(argv);
if (arg == 0)
return 0;
check_var_arg(arg, callh, name, arg_name);
}
/* Make sure there are no extra arguments. */
check_for_extra_args(argv, callh, name, "six arguments", 0);
return 0;
}
/*
* The runtime code for $countdrivers().
*/
static PLI_INT32 sys_countdrivers_calltf(ICARUS_VPI_CONST PLI_BYTE8 *name)
{
vpiHandle callh = vpi_handle(vpiSysTfCall, 0);
vpiHandle argv = vpi_iterate(vpiArgument, callh);
vpiHandle arg;
unsigned idx;
unsigned counts[4];
unsigned num_drivers;
s_vpi_value val;
(void)name; /* Parameter is not used. */
/* All returned values are integers. */
val.format = vpiIntVal;
/* Get the base net reference and bit select */
idx = 0;
arg = vpi_scan(argv);
assert(arg);
if (vpi_get(vpiType, arg) == vpiPartSelect) {
idx = vpi_get(vpiLeftRange, arg);
arg = vpi_handle(vpiParent, arg);
assert(arg);
}
/* Get the net driver counts from the runtime. */
vpip_count_drivers(arg, idx, counts);
num_drivers = counts[0] + counts[1] + counts[2];
/* Handle optional net_is_forced argument. */
arg = vpi_scan(argv);
if (arg == 0) goto args_done;
val.value.integer = counts[3];
vpi_put_value(arg, &val, 0, vpiNoDelay);
/* Handle optional number_of_01x_drivers argument. */
arg = vpi_scan(argv);
if (arg == 0) goto args_done;
val.value.integer = num_drivers;
vpi_put_value(arg, &val, 0, vpiNoDelay);
/* Handle optional number_of_0_drivers argument. */
arg = vpi_scan(argv);
if (arg == 0) goto args_done;
val.value.integer = counts[0];
vpi_put_value(arg, &val, 0, vpiNoDelay);
/* Handle optional number_of_1_drivers argument. */
arg = vpi_scan(argv);
if (arg == 0) goto args_done;
val.value.integer = counts[1];
vpi_put_value(arg, &val, 0, vpiNoDelay);
/* Handle optional number_of_x_drivers argument. */
arg = vpi_scan(argv);
if (arg == 0) goto args_done;
val.value.integer = counts[2];
vpi_put_value(arg, &val, 0, vpiNoDelay);
/* Free the argument iterator. */
vpi_free_object(argv);
args_done:
val.value.integer = (num_drivers > 1) ? 1 : 0;
vpi_put_value(callh, &val, 0, vpiNoDelay);
return 0;
}
/*
* Routine to register the system tasks/functions provided in this file.
*/
void sys_countdrivers_register(void)
{
s_vpi_systf_data tf_data;
vpiHandle res;
tf_data.type = vpiSysFunc;
tf_data.sysfunctype = vpiSizedFunc;
tf_data.tfname = "$countdrivers";
tf_data.calltf = sys_countdrivers_calltf;
tf_data.compiletf = sys_countdrivers_compiletf;
tf_data.sizetf = sys_countdrivers_sizetf;
tf_data.user_data = "$countdrivers";
res = vpi_register_systf(&tf_data);
vpip_make_systf_system_defined(res);
}
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