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/*
* Copyright (c) 2003-2021 Michael Ruff (mruff at chiaro.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 <stdio.h>
# include <string.h>
# include <math.h>
static double bits2double(PLI_UINT32 bits[2])
{
union conv {
double rval;
unsigned char bval[sizeof(double)];
} conv;
#ifdef WORDS_BIGENDIAN
conv.bval[7] = (bits[0] >> 0) & 0xff;
conv.bval[6] = (bits[0] >> 8) & 0xff;
conv.bval[5] = (bits[0] >> 16) & 0xff;
conv.bval[4] = (bits[0] >> 24) & 0xff;
conv.bval[3] = (bits[1] >> 0) & 0xff;
conv.bval[2] = (bits[1] >> 8) & 0xff;
conv.bval[1] = (bits[1] >> 16) & 0xff;
conv.bval[0] = (bits[1] >> 24) & 0xff;
#else
conv.bval[0] = (bits[0] >> 0) & 0xff;
conv.bval[1] = (bits[0] >> 8) & 0xff;
conv.bval[2] = (bits[0] >> 16) & 0xff;
conv.bval[3] = (bits[0] >> 24) & 0xff;
conv.bval[4] = (bits[1] >> 0) & 0xff;
conv.bval[5] = (bits[1] >> 8) & 0xff;
conv.bval[6] = (bits[1] >> 16) & 0xff;
conv.bval[7] = (bits[1] >> 24) & 0xff;
#endif
return conv.rval;
}
static void double2bits(double real, PLI_UINT32 bits[2])
{
union conv {
double rval;
unsigned char bval[sizeof(double)];
} conv;
conv.rval = real;
#ifdef WORDS_BIGENDIAN
bits[0] = conv.bval[7]
| (conv.bval[6] << 8)
| (conv.bval[5] <<16)
| (conv.bval[4] <<24);
bits[1] = conv.bval[3]
| (conv.bval[2] << 8)
| (conv.bval[1] <<16)
| (conv.bval[0] <<24);
#else
bits[0] = conv.bval[0]
| (conv.bval[1] << 8)
| (conv.bval[2] <<16)
| (conv.bval[3] <<24);
bits[1] = conv.bval[4]
| (conv.bval[5] << 8)
| (conv.bval[6] <<16)
| (conv.bval[7] <<24);
#endif
}
static void error_message(vpiHandle callh, const char* msg)
{
vpi_printf("ERROR: %s:%d: ", vpi_get_str(vpiFile, callh),
(int)vpi_get(vpiLineNo, callh));
vpi_printf(msg, vpi_get_str(vpiName, callh));
vpip_set_return_value(1);
vpi_control(vpiFinish, 1);
}
static PLI_INT32 sizetf_64 (ICARUS_VPI_CONST PLI_BYTE8*name)
{
(void)name; /* Parameter is not used. */
return 64;
}
static PLI_INT32 sys_convert_compiletf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
vpiHandle callh = vpi_handle(vpiSysTfCall, 0);
vpiHandle argv = vpi_iterate(vpiArgument, callh);
vpiHandle arg;
/* Check that there is an argument. */
if (argv == 0) {
error_message(callh, "%s requires one argument.\n");
return 0;
}
/* In Icarus if we have an argv we have at least one argument. */
arg = vpi_scan(argv);
/* Validate the argument. Only $bitstoreal for now. */
if (!strcmp("$bitstoreal", name) && vpi_get(vpiSize, arg) != 64) {
error_message(callh, "%s requires a 64-bit argument.\n");
return 0;
}
/* Save the argument away to make the calltf faster. */
vpi_put_userdata(callh, (void *) arg);
/* These functions only take one argument. */
check_for_extra_args(argv, callh, name, "one argument", 0);
return 0;
}
static PLI_INT32 sys_bitstoreal_calltf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
vpiHandle callh = vpi_handle(vpiSysTfCall, 0);
vpiHandle arg = (vpiHandle) vpi_get_userdata(callh);
s_vpi_value value;
PLI_UINT32 bits[2];
(void)name; /* Parameter is not used. */
/* get value */
value.format = vpiVectorVal;
vpi_get_value(arg, &value);
/* convert */
bits[0] = (value.value.vector[0]).aval;
bits[1] = (value.value.vector[1]).aval;
value.value.real = bits2double(bits);
value.format = vpiRealVal;
/* return converted value */
vpi_put_value(callh, &value, 0, vpiNoDelay);
return 0;
}
static PLI_INT32 sys_itor_calltf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
vpiHandle callh = vpi_handle(vpiSysTfCall, 0);
vpiHandle arg = (vpiHandle) vpi_get_userdata(callh);
s_vpi_value value;
(void)name; /* Parameter is not used. */
/* get value */
value.format = vpiIntVal;
vpi_get_value(arg, &value);
/* convert */
value.value.real = value.value.integer;
value.format = vpiRealVal;
/* return converted value */
vpi_put_value(callh, &value, 0, vpiNoDelay);
return 0;
}
static PLI_INT32 sys_realtobits_calltf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
vpiHandle callh = vpi_handle(vpiSysTfCall, 0);
vpiHandle arg = (vpiHandle) vpi_get_userdata(callh);
s_vpi_value value;
static struct t_vpi_vecval res[2];
PLI_UINT32 bits[2];
(void)name; /* Parameter is not used. */
/* get value */
value.format = vpiRealVal;
vpi_get_value(arg, &value);
/* convert */
double2bits(value.value.real, bits);
res[0].aval = bits[0];
res[0].bval = 0;
res[1].aval = bits[1];
res[1].bval = 0;
value.format = vpiVectorVal;
value.value.vector = res;
/* return converted value */
vpi_put_value(callh, &value, 0, vpiNoDelay);
return 0;
}
static PLI_INT32 sys_rtoi_calltf(ICARUS_VPI_CONST PLI_BYTE8*name)
{
vpiHandle callh = vpi_handle(vpiSysTfCall, 0);
vpiHandle arg = (vpiHandle) vpi_get_userdata(callh);
s_vpi_value value;
static struct t_vpi_vecval res;
double val;
(void)name; /* Parameter is not used. */
/* get value */
value.format = vpiRealVal;
vpi_get_value(arg, &value);
/* If the value is NaN or +/- infinity then return 'bx */
val = value.value.real;
if (val != val || (val && (val == 0.5*val))) {
res.aval = ~(PLI_INT32)0;
res.bval = ~(PLI_INT32)0;
} else {
/* This is not 100% correct since large real values may break this
* code. See the verinum code for a more rigorous implementation. */
if (val >= 0.0) res.aval = (PLI_UINT64) val;
else res.aval = - (PLI_UINT64) -val;
res.bval = 0;
}
value.format = vpiVectorVal;
value.value.vector = &res;
/* return converted value */
vpi_put_value(callh, &value, 0, vpiNoDelay);
return 0;
}
void sys_convert_register(void)
{
s_vpi_systf_data tf_data;
vpiHandle res;
tf_data.type = vpiSysFunc;
tf_data.sysfunctype = vpiRealFunc;
tf_data.user_data = "$bitstoreal";
tf_data.tfname = tf_data.user_data;
tf_data.sizetf = 0;
tf_data.compiletf = sys_convert_compiletf;
tf_data.calltf = sys_bitstoreal_calltf;
res = vpi_register_systf(&tf_data);
vpip_make_systf_system_defined(res);
tf_data.type = vpiSysFunc;
tf_data.sysfunctype = vpiRealFunc;
tf_data.user_data = "$itor";
tf_data.tfname = tf_data.user_data;
tf_data.sizetf = 0;
tf_data.compiletf = sys_convert_compiletf;
tf_data.calltf = sys_itor_calltf;
res = vpi_register_systf(&tf_data);
vpip_make_systf_system_defined(res);
tf_data.type = vpiSysFunc;
tf_data.sysfunctype = vpiSizedFunc;
tf_data.user_data = "$realtobits";
tf_data.tfname = tf_data.user_data;
tf_data.sizetf = sizetf_64;
tf_data.compiletf = sys_convert_compiletf;
tf_data.calltf = sys_realtobits_calltf;
res = vpi_register_systf(&tf_data);
vpip_make_systf_system_defined(res);
tf_data.type = vpiSysFunc;
tf_data.sysfunctype = vpiIntFunc;
tf_data.user_data = "$rtoi";
tf_data.tfname = tf_data.user_data;
tf_data.sizetf = 0;
tf_data.compiletf = sys_convert_compiletf;
tf_data.calltf = sys_rtoi_calltf;
res = vpi_register_systf(&tf_data);
vpip_make_systf_system_defined(res);
}
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