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/*
* Copyright (c) 2000-2011 Stephen Williams (steve@icarus.com)
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form 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 <string.h>
#include <math.h>
#include <assert.h>
static PLI_INT32 sys_time_calltf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
s_vpi_value val;
s_vpi_time now;
vpiHandle call_handle;
vpiHandle mod;
int units, prec;
long scale;
call_handle = vpi_handle(vpiSysTfCall, 0);
assert(call_handle);
mod = sys_func_module(call_handle);
now.type = vpiSimTime;
vpi_get_time(0, &now);
/* All the variants but $simtime return the time in units of
the local scope. The $simtime function returns the
simulation time. */
if (strcmp(name, "$simtime") == 0)
units = vpi_get(vpiTimePrecision, 0);
else
units = vpi_get(vpiTimeUnit, mod);
prec = vpi_get(vpiTimePrecision, 0);
scale = 1;
while (units > prec) {
scale *= 10;
units -= 1;
}
assert(8*sizeof(long long) >= 64);
{ long frac;
long long tmp_now = ((long long)now.high) << 32;
tmp_now += (long long)now.low;
frac = tmp_now % (long long)scale;
tmp_now /= (long long)scale;
/* Round to the nearest integer, which may be up. */
if ((scale > 1) && (frac >= scale/2))
tmp_now += 1;
now.low = tmp_now & 0xffffffff;
now.high = tmp_now >> 32LL;
}
val.format = vpiTimeVal;
val.value.time = &now;
vpi_put_value(call_handle, &val, 0, vpiNoDelay);
return 0;
}
/* This also supports $abstime() from VAMS-2.3. */
static PLI_INT32 sys_realtime_calltf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
s_vpi_value val;
s_vpi_time now;
vpiHandle callh;
vpiHandle mod;
callh = vpi_handle(vpiSysTfCall, 0);
assert(callh);
mod = sys_func_module(callh);
now.type = vpiScaledRealTime;
vpi_get_time(mod, &now);
/* For $abstime() we return the time in second. */
if (strcmp(name, "$abstime") == 0) {
PLI_INT32 scale = vpi_get(vpiTimeUnit, mod);
if (scale >= 0) now.real *= pow(10.0, scale);
else now.real /= pow(10.0, -scale);
}
val.format = vpiRealVal;
val.value.real = now.real;
vpi_put_value(callh, &val, 0, vpiNoDelay);
return 0;
}
void sys_time_register(void)
{
s_vpi_systf_data tf_data;
vpiHandle res;
tf_data.type = vpiSysFunc;
tf_data.tfname = "$time";
tf_data.sysfunctype = vpiTimeFunc;
tf_data.calltf = sys_time_calltf;
tf_data.compiletf = sys_no_arg_compiletf;
tf_data.sizetf = 0;
tf_data.user_data = "$time";
res = vpi_register_systf(&tf_data);
vpip_make_systf_system_defined(res);
tf_data.type = vpiSysFunc;
tf_data.tfname = "$realtime";
tf_data.sysfunctype = vpiRealFunc;
tf_data.calltf = sys_realtime_calltf;
tf_data.compiletf = sys_no_arg_compiletf;
tf_data.sizetf = 0;
tf_data.user_data = "$realtime";
res = vpi_register_systf(&tf_data);
vpip_make_systf_system_defined(res);
tf_data.type = vpiSysFunc;
tf_data.tfname = "$stime";
tf_data.sysfunctype = vpiIntFunc;
tf_data.calltf = sys_time_calltf;
tf_data.compiletf = sys_no_arg_compiletf;
tf_data.sizetf = 0;
tf_data.user_data = "$stime";
res = vpi_register_systf(&tf_data);
vpip_make_systf_system_defined(res);
tf_data.type = vpiSysFunc;
tf_data.tfname = "$simtime";
tf_data.sysfunctype = vpiTimeFunc;
tf_data.calltf = sys_time_calltf;
tf_data.compiletf = sys_no_arg_compiletf;
tf_data.sizetf = 0;
tf_data.user_data = "$simtime";
res = vpi_register_systf(&tf_data);
vpip_make_systf_system_defined(res);
tf_data.type = vpiSysFunc;
tf_data.tfname = "$abstime";
tf_data.sysfunctype = vpiRealFunc;
tf_data.calltf = sys_realtime_calltf;
tf_data.compiletf = sys_no_arg_compiletf;
tf_data.sizetf = 0;
tf_data.user_data = "$abstime";
res = vpi_register_systf(&tf_data);
vpip_make_systf_system_defined(res);
}
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