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iverilog/vvp/vpi_vthr_vector.cc

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/*
* Copyright (c) 2001-2012 Stephen Williams (steve@icarus.com)
* Copyright (c) 2001 Stephan Boettcher <stephan@nevis.columbia.edu>
*
* 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.
*/
/*
* vpiReg handles are handled here. These objects represent vectors of
* .var objects that can be manipulated by the VPI module.
*/
# include "vpi_priv.h"
# include "vthread.h"
# include "config.h"
#ifdef CHECK_WITH_VALGRIND
# include "vvp_cleanup.h"
# include <map>
#endif
# include <cstdio>
# include <cstdlib>
# include <cassert>
# include "ivl_alloc.h"
struct __vpiVThrVec : public __vpiHandle {
__vpiVThrVec();
int get_type_code(void) const;
int vpi_get(int code);
char* vpi_get_str(int code);
void vpi_get_value(p_vpi_value val);
vpiHandle vpi_put_value(p_vpi_value val, int flags);
unsigned bas;
unsigned wid;
unsigned signed_flag : 1;
const char *name;
};
inline static
vvp_bit4_t get_bit(struct __vpiVThrVec *rfp, unsigned idx)
{
return vthread_get_bit(vpip_current_vthread, rfp->bas+idx);
}
inline static
void set_bit(struct __vpiVThrVec *rfp, unsigned idx, vvp_bit4_t bit)
{
return vthread_put_bit(vpip_current_vthread, rfp->bas+idx, bit);
}
/*
* Hex digits that represent 4-value bits of Verilog are not as
* trivially obvious to display as if the bits were the usual 2-value
* bits. So, although it is possible to write a function that
* generates a correct character for 4*4-value bits, it is easier to
* just perform the lookup in a table. This only takes 256 bytes,
* which is not many executable instructions:-)
*
* The table is calculated as compile time, therefore, by the
* draw_tt.c program.
*/
extern const char hex_digits[256];
extern const char oct_digits[64];
/*
* vpi_get
*/
static int vthr_vec_get(int code, vpiHandle ref)
{
struct __vpiVThrVec*rfp = dynamic_cast<__vpiVThrVec*>(ref);
assert(rfp);
switch (code) {
case vpiSigned:
return rfp->signed_flag;
case vpiConstType:
return vpiBinaryConst; // If this is a constant it is Binary.
case vpiSize:
return rfp->wid;
#if defined(CHECK_WITH_VALGRIND) || defined(BR916_STOPGAP_FIX)
case _vpiFromThr:
return _vpiVThr;
#endif
default:
return 0;
}
}
static char* vthr_vec_get_str(int code, vpiHandle ref)
{
struct __vpiVThrVec*rfp = dynamic_cast<__vpiVThrVec*>(ref);
assert(rfp);
switch (code) {
case vpiFullName: /* should this be vpiName? */
return simple_set_rbuf_str(rfp->name);
}
return 0;
}
static void vthr_vec_DecStrVal(struct __vpiVThrVec*rfp, s_vpi_value*vp)
{
int nbuf = (rfp->wid+2)/3 + 1;
char *rbuf = need_result_buf(nbuf, RBUF_VAL);
vvp_vector4_t tmp (rfp->wid);
for (unsigned idx = 0 ; idx < rfp->wid ; idx += 1)
tmp.set_bit(idx, get_bit(rfp, idx));
vpip_vec4_to_dec_str(tmp, rbuf, nbuf, rfp->signed_flag);
vp->value.str = rbuf;
return;
}
static void vthr_vec_StringVal(struct __vpiVThrVec*rfp, s_vpi_value*vp)
{
char tmp = 0;
char *rbuf = need_result_buf((rfp->wid / 8) + 1, RBUF_VAL);
char *cp = rbuf;
for(int bitnr=rfp->wid-1; bitnr>=0; bitnr--){
tmp <<= 1;
switch(get_bit(rfp, bitnr)){
case BIT4_0:
break;
case BIT4_1:
tmp |= 1;
break;
default:
break;
}
if ((bitnr&7)==0){
// Don't including leading nulls
if (tmp == 0 && cp == rbuf)
continue;
// Translated embedded nulls to space.
*cp++ = tmp? tmp : ' ';
tmp = 0;
}
}
*cp++ = 0;
vp->value.str = rbuf;
return;
}
/*
* The get_value method reads the values of the functors and returns
* the vector to the caller. This causes no side-effect, and reads the
* variables like a %load would.
*/
static void vthr_vec_get_value(vpiHandle ref, s_vpi_value*vp)
{
struct __vpiVThrVec*rfp = dynamic_cast<__vpiVThrVec*>(ref);
assert(rfp);
char *rbuf;
unsigned wid = rfp->wid;
switch (vp->format) {
case vpiBinStrVal:
rbuf = need_result_buf(wid+1, RBUF_VAL);
for (unsigned idx = 0 ; idx < wid ; idx += 1) {
rbuf[wid-idx-1] = vvp_bit4_to_ascii(get_bit(rfp, idx));
}
rbuf[wid] = 0;
vp->value.str = rbuf;
break;
case vpiHexStrVal: {
unsigned hval, hwid;
hwid = (wid + 3) / 4;
rbuf = need_result_buf(hwid+1, RBUF_VAL);
rbuf[hwid] = 0;
hval = 0;
for (unsigned idx = 0 ; idx < wid ; idx += 1) {
unsigned tmp = 0;
switch (get_bit(rfp, idx)) {
case BIT4_0:
tmp = 0;
break;
case BIT4_1:
tmp = 1;
break;
case BIT4_X:
tmp = 2;
break;
case BIT4_Z:
tmp = 3;
break;
}
hval = hval | (tmp << 2*(idx % 4));
if (idx%4 == 3) {
hwid -= 1;
rbuf[hwid] = hex_digits[hval];
hval = 0;
}
}
if (hwid > 0) {
hwid -= 1;
rbuf[hwid] = hex_digits[hval];
hval = 0;
}
vp->value.str = rbuf;
break;
}
case vpiOctStrVal: {
unsigned hval, hwid;
hwid = (wid + 2) / 3;
rbuf = need_result_buf(hwid+1, RBUF_VAL);
rbuf[hwid] = 0;
hval = 0;
for (unsigned idx = 0 ; idx < wid ; idx += 1) {
unsigned tmp = 0;
switch (get_bit(rfp, idx)) {
case BIT4_0:
tmp = 0;
break;
case BIT4_1:
tmp = 1;
break;
case BIT4_X:
tmp = 2;
break;
case BIT4_Z:
tmp = 3;
break;
}
hval = hval | (tmp << 2*(idx % 3));
if (idx%3 == 2) {
hwid -= 1;
rbuf[hwid] = oct_digits[hval];
hval = 0;
}
}
if (hwid > 0) {
hwid -= 1;
rbuf[hwid] = oct_digits[hval];
hval = 0;
}
vp->value.str = rbuf;
break;
}
case vpiDecStrVal:
vthr_vec_DecStrVal(rfp, vp);
break;
case vpiStringVal:
vthr_vec_StringVal(rfp, vp);
break;
case vpiIntVal: {
long ival = 0;
for (unsigned idx = 0 ; idx < wid ; idx += 1) {
switch (get_bit(rfp, idx)) {
case BIT4_0:
break;
case BIT4_1:
ival |= 1 << idx;
break;
default:
break;
}
}
vp->value.integer = ival;
}
break;
case vpiRealVal:
vp->value.real = 0;
for (unsigned idx = wid ; idx > 0 ; idx -= 1) {
vp->value.real *= 2.0;
switch (get_bit(rfp, idx-1)) {
case BIT4_0:
break;
case BIT4_1:
vp->value.real += 1.0;
break;
default:
break;
}
}
break;
case vpiObjTypeVal:
vp->format = vpiVectorVal;
case vpiVectorVal:
vp->value.vector = (s_vpi_vecval*)
need_result_buf((wid+31)/32*sizeof(s_vpi_vecval), RBUF_VAL);
assert(vp->value.vector);
for (unsigned idx = 0 ; idx < wid ; idx += 1) {
int word = idx/32;
PLI_INT32 mask = 1 << (idx%32);
switch (get_bit(rfp,idx)) {
case BIT4_0:
vp->value.vector[word].aval &= ~mask;
vp->value.vector[word].bval &= ~mask;
break;
case BIT4_1:
vp->value.vector[word].aval |= mask;
vp->value.vector[word].bval &= ~mask;
break;
case BIT4_X:
vp->value.vector[word].aval |= mask;
vp->value.vector[word].bval |= mask;
break;
case BIT4_Z:
vp->value.vector[word].aval &= ~mask;
vp->value.vector[word].bval |= mask;
break;
}
}
break;
default:
fprintf(stderr, "internal error: vpi_get_value(<format=%d>)"
" not implemented for vthr_vectors.\n", (int)vp->format);
/* XXXX Not implemented yet. */
assert(0);
}
}
/*
* The put_value method writes the value into the vector.
*/
static vpiHandle vthr_vec_put_value(vpiHandle ref, s_vpi_value*vp, int)
{
struct __vpiVThrVec*rfp = dynamic_cast<__vpiVThrVec*>(ref);
assert(rfp);
unsigned wid = rfp->wid;
switch (vp->format) {
case vpiIntVal: {
assert(wid <= sizeof(long));
long val = vp->value.integer;
for (unsigned idx = 0 ; idx < wid ; idx += 1) {
set_bit(rfp, idx, (val&1)? BIT4_1 : BIT4_0);
val >>= 1;
}
break;
}
case vpiScalarVal:
switch (vp->value.scalar) {
case vpi0:
set_bit(rfp, 0, BIT4_0);
break;
case vpi1:
set_bit(rfp, 0, BIT4_1);
break;
case vpiX:
set_bit(rfp, 0, BIT4_X);
break;
case vpiZ:
set_bit(rfp, 0, BIT4_Z);
break;
default:
fprintf(stderr, "Unsupported scalar value %d.\n",
(int)vp->value.scalar);
assert(0);
}
break;
case vpiVectorVal: {
assert(wid <= sizeof (unsigned long));
unsigned long aval = vp->value.vector->aval;
unsigned long bval = vp->value.vector->bval;
for (unsigned idx = 0 ; idx < wid ; idx += 1) {
int bit = (aval&1) | (((bval^aval)<<1)&2);
switch (bit) {
case 0:
set_bit(rfp, idx, BIT4_0);
break;
case 1:
set_bit(rfp, idx, BIT4_1);
break;
case 2:
set_bit(rfp, idx, BIT4_X);
break;
case 3:
set_bit(rfp, idx, BIT4_Z);
break;
}
aval >>= 1;
bval >>= 1;
}
break;
}
default:
fprintf(stderr, "Unsupported format %d.\n", (int)vp->format);
assert(0);
}
return ref;
}
// The code fully supports vpiReg, vpi_Net, but we do not
// create such things, yet. Lacking a name, for example.
inline __vpiVThrVec::__vpiVThrVec()
{ }
int __vpiVThrVec::get_type_code(void) const
{ return vpiConstant; }
int __vpiVThrVec::vpi_get(int code)
{ return vthr_vec_get(code, this); }
char* __vpiVThrVec::vpi_get_str(int code)
{ return vthr_vec_get_str(code, this); }
void __vpiVThrVec::vpi_get_value(p_vpi_value val)
{ vthr_vec_get_value(this, val); }
vpiHandle __vpiVThrVec::vpi_put_value(p_vpi_value val, int flags)
{ return vthr_vec_put_value(this, val, flags); }
/*
* Construct a vpiReg object. Give the object specified dimensions,
* and point to the specified functor for the lsb.
*/
vpiHandle vpip_make_vthr_vector(unsigned base, unsigned wid, bool signed_flag)
{
struct __vpiVThrVec*obj = new __vpiVThrVec;
assert(base < 65536);
obj->bas = base;
assert(wid < 65536);
obj->wid = wid;
obj->signed_flag = signed_flag? 1 : 0;
obj->name = vpip_name_string("T<>");
return obj;
}
#ifdef CHECK_WITH_VALGRIND
static map<vpiHandle, bool> handle_map;
void thread_vthr_delete(vpiHandle item)
{
handle_map[item] = true;
}
static void thread_vthr_delete_real(vpiHandle item)
{
struct __vpiVThrVec*obj = dynamic_cast<__vpiVThrVec*>(item);
delete obj;
}
#endif
struct __vpiVThrWord : public __vpiHandle {
__vpiVThrWord();
int get_type_code(void) const;
int vpi_get(int code);
void vpi_get_value(p_vpi_value val);
const char* name;
int subtype;
unsigned index;
};
static int vthr_word_get(int code, vpiHandle ref)
{
struct __vpiVThrWord*rfp = dynamic_cast<__vpiVThrWord*>(ref);
switch (code) {
case vpiConstType:
return rfp->subtype;
#if defined(CHECK_WITH_VALGRIND) || defined(BR916_STOPGAP_FIX)
case _vpiFromThr:
return _vpiWord;
#endif
default:
return 0;
}
}
static void vthr_real_get_value(vpiHandle ref, s_vpi_value*vp)
{
struct __vpiVThrWord*obj = dynamic_cast<__vpiVThrWord*>(ref);
char *rbuf = need_result_buf(66, RBUF_VAL);
double val = 0.0;
/* Get the actual value from the index. It is possible, by the
way, that the vpi_get_value is called from compiletf. If
that's the case, there will be no current thread, and this
will not have access to the proper value. Punt and return a
0.0 value instead. */
if (vpip_current_vthread)
val = vthread_get_real_stack(vpip_current_vthread, obj->index);
switch (vp->format) {
case vpiObjTypeVal:
vp->format = vpiRealVal;
case vpiRealVal:
vp->value.real = val;
break;
case vpiIntVal:
vp->value.integer = (int)(val + 0.5);
break;
case vpiDecStrVal:
sprintf(rbuf, "%0.0f", val);
vp->value.str = rbuf;
break;
case vpiHexStrVal:
sprintf(rbuf, "%lx", (long)val);
vp->value.str = rbuf;
break;
case vpiBinStrVal: {
unsigned long vali = (unsigned long)val;
unsigned len = 0;
while (vali > 0) {
len += 1;
vali /= 2;
}
vali = (unsigned long)val;
for (unsigned idx = 0 ; idx < len ; idx += 1) {
rbuf[len-idx-1] = (vali & 1)? '1' : '0';
vali /= 2;
}
rbuf[len] = 0;
if (len == 0) {
rbuf[0] = '0';
rbuf[1] = 0;
}
vp->value.str = rbuf;
break;
}
default:
fprintf(stderr, "vvp error: get %d not supported "
"by vpiConstant (Real)\n", (int)vp->format);
vp->format = vpiSuppressVal;
break;
}
}
inline __vpiVThrWord::__vpiVThrWord()
{ }
int __vpiVThrWord::get_type_code(void) const
{ return vpiConstant; }
int __vpiVThrWord::vpi_get(int code)
{ return vthr_word_get(code, this); }
void __vpiVThrWord::vpi_get_value(p_vpi_value val)
{ vthr_real_get_value(this, val); }
vpiHandle vpip_make_vthr_word(unsigned base, const char*type)
{
struct __vpiVThrWord*obj = new __vpiVThrWord;
assert(type[0] == 'r');
obj->name = vpip_name_string("W<>");
obj->subtype = vpiRealConst;
assert(base < 65536);
obj->index = base;
return obj;
}
#ifdef CHECK_WITH_VALGRIND
void thread_word_delete(vpiHandle item)
{
handle_map[item] = false;
}
static void thread_word_delete_real(vpiHandle item)
{
struct __vpiVThrWord*obj = dynamic_cast<__vpiVThrWord*>(item);
delete obj;
}
void vpi_handle_delete()
{
map<vpiHandle, bool>::iterator iter;
for (iter = handle_map.begin(); iter != handle_map.end(); ++ iter ) {
if (iter->second) thread_vthr_delete_real(iter->first);
else thread_word_delete_real(iter->first);
}
}
#endif
class __vpiVThrStrStack : public __vpiHandle {
public:
__vpiVThrStrStack(unsigned depth);
int get_type_code(void) const;
int vpi_get(int code);
void vpi_get_value(p_vpi_value val);
private:
const char* name;
unsigned depth_;
};
__vpiVThrStrStack::__vpiVThrStrStack(unsigned d)
: depth_(d)
{
}
int __vpiVThrStrStack::get_type_code(void) const
{ return vpiConstant; }
int __vpiVThrStrStack::vpi_get(int code)
{
switch (code) {
case vpiConstType:
return vpiStringConst;
#if defined(CHECK_WITH_VALGRIND) || defined(BR916_STOPGAP_FIX)
case _vpiFromThr:
return _vpiString;
#endif
default:
return 0;
}
}
void __vpiVThrStrStack::vpi_get_value(p_vpi_value vp)
{
string val;
char*rbuf = 0;
if (vpip_current_vthread)
val = vthread_get_str_stack(vpip_current_vthread, depth_);
switch (vp->format) {
case vpiObjTypeVal:
vp->format = vpiStringVal;
case vpiStringVal:
rbuf = need_result_buf(val.size()+1, RBUF_VAL);
strcpy(rbuf, val.c_str());
vp->value.str = rbuf;
break;
default:
fprintf(stderr, "vvp error: get %d not supported "
"by vpiConstant (String)\n", (int)vp->format);
vp->format = vpiSuppressVal;
break;
}
}
vpiHandle vpip_make_vthr_str_stack(unsigned depth)
{
class __vpiVThrStrStack*obj = new __vpiVThrStrStack(depth);
return obj;
}
#ifdef CHECK_WITH_VALGRIND
static map<vpiHandle, bool> stack_map;
void thread_string_delete(vpiHandle item)
{
stack_map[item] = false;
}
static void thread_string_delete_real(vpiHandle item)
{
class __vpiVThrStrStack*obj = dynamic_cast<__vpiVThrStrStack*>(item);
delete obj;
}
void vpi_stack_delete()
{
map<vpiHandle, bool>::iterator iter;
for (iter = stack_map.begin(); iter != stack_map.end(); ++ iter ) {
thread_string_delete_real(iter->first);
}
}
#endif
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