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lexor.lex
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lexor.lex
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%{
/*
* Copyright (c) 1998-2000 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: lexor.lex,v 1.58 2001/06/18 00:51:23 steve Exp $"
#endif
//# define YYSTYPE lexval
# include <iostream.h>
# include "compiler.h"
# include "parse_misc.h"
# include "parse.h"
# include <ctype.h>
# include <string.h>
# include "lexor_keyword.h"
extern FILE*vl_input;
extern string vl_file;
# define YY_USER_INIT reset_lexor();
# define yylval VLlval
/*
* Lexical location information is passed in the yylloc variable to th
* parser. The file names, strings, are kept in a list so that I can
* re-use them. The set_file_name function will return a pointer to
* the name as it exists in the list (and delete the passed string.)
* If the name is new, it will be added to the list.
*/
extern YYLTYPE yylloc;
struct file_name_cell {
const char*text;
struct file_name_cell*next;
};
static struct file_name_cell*file_names = 0;
static const char* set_file_name(char*text)
{
struct file_name_cell*cur = file_names;
while (cur) {
if (strcmp(cur->text, text) == 0) {
delete[]text;
return cur->text;
}
cur = cur->next;
}
cur = new struct file_name_cell;
cur->text = text;
cur->next = file_names;
return text;
}
extern void pform_set_timescale(int, int);
static void reset_lexor();
static void line_directive();
static void line_directive2();
static verinum*make_sized_binary(const char*txt);
static verinum*make_sized_dec(const char*txt);
static verinum*make_sized_octal(const char*txt);
static verinum*make_sized_hex(const char*txt);
static verinum*make_unsized_binary(const char*txt);
static verinum*make_unsized_dec(const char*txt);
static verinum*make_unsized_octal(const char*txt);
static verinum*make_unsized_hex(const char*txt);
static void process_timescale(const char*txt);
static int comment_enter;
%}
%x CCOMMENT
%x LCOMMENT
%x CSTRING
%s UDPTABLE
%x PPTIMESCALE
W [ \t\b\f\r]+
%%
^"#line"[ ]+\"[^\"]*\"[ ]+[0-9]+.* { line_directive(); }
^"`line"[ ]+[0-9]+[ ]+\"[^\"]*\".* { line_directive2(); }
[ \t\b\f\r] { ; }
\n { yylloc.first_line += 1; }
"//".* { comment_enter = YY_START; BEGIN(LCOMMENT); }
<LCOMMENT>. { yymore(); }
<LCOMMENT>\n { yylloc.first_line += 1; BEGIN(comment_enter); }
"/*" { comment_enter = YY_START; BEGIN(CCOMMENT); }
<CCOMMENT>. { yymore(); }
<CCOMMENT>\n { yylloc.first_line += 1; yymore(); }
<CCOMMENT>"*/" { BEGIN(comment_enter); }
"<<" { return K_LS; }
">>" { return K_RS; }
"<=" { return K_LE; }
">=" { return K_GE; }
"=>" { return K_EG; }
"*>" { return K_SG; }
"==" { return K_EQ; }
"!=" { return K_NE; }
"===" { return K_CEQ; }
"!==" { return K_CNE; }
"||" { return K_LOR; }
"&&" { return K_LAND; }
"~|" { return K_NOR; }
"~^" { return K_NXOR; }
"^~" { return K_NXOR; }
"~&" { return K_NAND; }
"->" { return K_TRIGGER; }
[}{;:\[\],()#=.@&!?<>%|^~+*/-] { return yytext[0]; }
\" { BEGIN(CSTRING); }
<CSTRING>\\\" { yymore(); }
<CSTRING>\n { BEGIN(0);
yylval.text = strdup(yytext);
VLerror(yylloc, "Missing close quote of string.");
yylloc.first_line += 1;
return STRING; }
<CSTRING>\" { BEGIN(0);
yylval.text = strdup(yytext);
yylval.text[strlen(yytext)-1] = 0;
return STRING; }
<CSTRING>. { yymore(); }
<UDPTABLE>\(\?0\) { return '_'; }
<UDPTABLE>\(\?1\) { return '+'; }
<UDPTABLE>\(\?[xX]\) { return '%'; }
<UDPTABLE>\(\?\?\) { return '*'; }
<UDPTABLE>\(01\) { return 'r'; }
<UDPTABLE>\(0[xX]\) { return 'Q'; }
<UDPTABLE>\(0\?\) { return 'P'; }
<UDPTABLE>\(10\) { return 'f'; }
<UDPTABLE>\(1[xX]\) { return 'M'; }
<UDPTABLE>\(1\?\) { return 'N'; }
<UDPTABLE>\([xX]0\) { return 'F'; }
<UDPTABLE>\([xX]1\) { return 'R'; }
<UDPTABLE>\([xX]\?\) { return 'B'; }
<UDPTABLE>[bB] { return 'b'; }
<UDPTABLE>[lL] { return 'l'; /* IVL extension */ }
<UDPTABLE>[hH] { return 'h'; /* IVL extension */ }
<UDPTABLE>[fF] { return 'f'; }
<UDPTABLE>[rR] { return 'r'; }
<UDPTABLE>[xX] { return 'x'; }
<UDPTABLE>[nN] { return 'n'; }
<UDPTABLE>[pP] { return 'p'; }
<UDPTABLE>[01\?\*\-] { return yytext[0]; }
[a-zA-Z_][a-zA-Z0-9$_]* {
int rc = lexor_keyword_code(yytext, yyleng);
if (rc == IDENTIFIER)
yylval.text = strdup(yytext);
else
yylval.text = 0;
return rc;
}
[a-zA-Z_][a-zA-Z0-9$_]*(\.[a-zA-Z_][a-zA-Z0-9$_]*)+ {
yylval.text = strdup(yytext);
return HIDENTIFIER; }
\\[^ \t\b\f\r]+ {
yylval.text = strdup(yytext);
return IDENTIFIER; }
\$([a-zA-Z0-9$_]+) {
if (strcmp(yytext,"$attribute") == 0)
return KK_attribute;
yylval.text = strdup(yytext);
return SYSTEM_IDENTIFIER; }
\.{W}?[a-zA-Z_][a-zA-Z0-9$_]* {
char*cp = yytext+1;
while (! (isalpha(*cp) || (*cp == '_')))
cp += 1;
yylval.text = strdup(cp);
return PORTNAME; }
[0-9][0-9_]*[ \t]*\'[sS]?[dD][ \t]*[0-9][0-9_]* {
yylval.number = make_sized_dec(yytext);
return NUMBER; }
[0-9][0-9_]*[ \t]*\'[sS]?[bB][ \t]*[0-1xzXZ_\?]+ {
yylval.number = make_sized_binary(yytext);
return NUMBER; }
[0-9][0-9_]*[ \t]*\'[sS]?[oO][ \t]*[0-7xzXZ_\?]+ {
yylval.number = make_sized_octal(yytext);
return NUMBER; }
[0-9][0-9_]*[ \t]*\'[sS]?[hH][ \t]*[0-9a-fA-FxzXZ_\?]+ {
yylval.number = make_sized_hex(yytext);
return NUMBER; }
\'[sS]?[dD][ \t]*[0-9][0-9_]* { yylval.number = make_unsized_dec(yytext);
return NUMBER; }
\'[sS]?[bB][ \t]*[0-1xzXZ_\?]+ { yylval.number = make_unsized_binary(yytext);
return NUMBER; }
\'[sS]?[oO][ \t]*[0-7xzXZ_\?]+ { yylval.number = make_unsized_octal(yytext);
return NUMBER; }
\'[sS]?[hH][ \t]*[0-9a-fA-FxzXZ_\?]+ { yylval.number = make_unsized_hex(yytext);
return NUMBER; }
[0-9][0-9_]* {
/* Handle the special case of the unsized decimal number. */
unsigned long value = 0;
for (const char*cp = yytext ; *cp ; cp += 1) {
if (*cp != '_')
value = 10 * value + (*cp - '0');
}
assert(INTEGER_WIDTH <= (8*sizeof(value)));
unsigned nbits = INTEGER_WIDTH;
verinum::V*bits = new verinum::V[8 * sizeof value];
for (unsigned idx = 0 ; idx < nbits ; idx += 1, value >>= 1) {
bits[idx] = (value&1) ? verinum::V1 : verinum::V0;
}
yylval.number = new verinum(bits, nbits, false);
yylval.number->has_sign(true);
delete[]bits;
return NUMBER; }
[0-9][0-9_]*\.[0-9][0-9_]*([Ee][+-]?[0-9][0-9_]*)? {
yylval.realtime = new verireal(yytext);
return REALTIME; }
[0-9][0-9_]*[Ee][+-]?[0-9][0-9_]* {
yylval.realtime = new verireal(yytext);
return REALTIME; }
/* Notice and handle the timescale directive. */
^{W}?`timescale { BEGIN(PPTIMESCALE); }
<PPTIMESCALE>.* { process_timescale(yytext); }
<PPTIMESCALE>\n {
yylloc.first_line += 1;
BEGIN(0); }
/* These are directives that I do not yet support. I think that IVL
should handle these, not an external preprocessor. */
^{W}?`celldefine{W}?.* { }
^{W}?`default_nettype{W}?.* { }
^{W}?`delay_mode_distributed{W}?.* { }
^{W}?`delay_mode_unit{W}?.* { }
^{W}?`delay_mode_path{W}?.* { }
^{W}?`disable_portfaults{W}?.* { }
^{W}?`enable_portfaults{W}?.* { }
^{W}?`endcelldefine{W}?.* { }
^{W}?`endprotect{W}?.* { }
^{W}?`nosuppress_faults{W}?.* { }
^{W}?`nounconnected_drive{W}?.* { }
^{W}?`protect{W}?.* { }
^{W}?`resetall{W}?.* { }
^{W}?`suppress_faults{W}?.* { }
^{W}?`unconnected_drive{W}?.* { }
^{W}?`uselib{W}?.* { }
/* These are directives that are not supported by me and should have
been handled by an external preprocessor such as ivlpp. */
^{W}?`define{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": `define not supported. Use an external preprocessor."
<< endl;
}
^{W}?`else{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": `else not supported. Use an external preprocessor."
<< endl;
}
^{W}?`endif{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": `endif not supported. Use an external preprocessor."
<< endl;
}
^{W}?`ifdef{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": `ifdef not supported. Use an external preprocessor."
<< endl;
}
^`include{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": `include not supported. Use an external preprocessor."
<< endl;
}
^`undef{W}?.* {
cerr << yylloc.text << ":" << yylloc.first_line <<
": `undef not supported. Use an external preprocessor."
<< endl;
}
/* Final catchall. something got lost or mishandled. */
. { cerr << yylloc.first_line << ": unmatched character (";
if (isgraph(yytext[0]))
cerr << yytext[0];
else
cerr << (unsigned)yytext[0];
cerr << ")" << endl; }
%%
/*
* The UDP state table needs some slightly different treatment by the
* lexor. The level characters are normally accepted as other things,
* so the parser needs to switch my mode when it believes in needs to.
*/
void lex_start_table()
{
BEGIN(UDPTABLE);
}
void lex_end_table()
{
BEGIN(INITIAL);
}
static verinum*make_binary_with_size(unsigned size, bool fixed, const char*ptr)
{
bool sign_flag = false;
verinum::V*bits = new verinum::V[size];
if (tolower(ptr[0]) == 's') {
ptr += 1;
sign_flag = true;
}
assert(tolower(*ptr) == 'b');
ptr += 1;
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
unsigned idx = 0;
const char*eptr = ptr + strlen(ptr) - 1;
while ((eptr >= ptr) && (idx < size)) {
switch (*eptr) {
case '_':
break;
case '0':
bits[idx++] = verinum::V0;
break;
case '1':
bits[idx++] = verinum::V1;
break;
case 'z': case 'Z': case '?':
bits[idx++] = verinum::Vz;
break;
case 'x': case 'X':
bits[idx++] = verinum::Vx;
break;
default:
assert(0);
}
eptr -= 1;
}
/* If we filled up the expected number of bits, but there are
still characters of the number part left, then report a
warning that we are truncating. */
if ((idx >= size) && (eptr >= ptr))
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: Numeric binary constant ``" << ptr <<
"'' truncated to " << size << " bits." << endl;
// Zero-extend binary number, except that z or x is extended
// if it is the highest supplied digit.
while (idx < size) {
switch (ptr[0]) {
case '0':
case '1':
bits[idx++] = verinum::V0;
break;
case 'z': case 'Z': case '?':
bits[idx++] = verinum::Vz;
break;
case 'x': case 'X':
bits[idx++] = verinum::Vx;
break;
default:
assert(0);
}
}
verinum*out = new verinum(bits, size, fixed);
delete[]bits;
out->has_sign(sign_flag);
return out;
}
static verinum*make_sized_binary(const char*txt)
{
char*ptr;
unsigned size = strtoul(txt,&ptr,10);
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
assert(*ptr == '\'');
ptr += 1;
return make_binary_with_size(size, true, ptr);
}
static verinum*make_unsized_binary(const char*txt)
{
bool sign_flag = false;
const char*ptr = txt;
assert(*ptr == '\'');
ptr += 1;
if (tolower(*ptr) == 's') {
sign_flag = true;
ptr += 1;
}
assert(tolower(*ptr) == 'b');
while (*ptr && ((*ptr == 'b') || (*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
unsigned size = 0;
for (const char*idx = ptr ; *idx ; idx += 1)
if (*idx != '_') size += 1;
verinum::V*bits = new verinum::V[size];
unsigned idx = size;
while (*ptr) {
switch (ptr[0]) {
case '0':
bits[--idx] = verinum::V0;
break;
case '1':
bits[--idx] = verinum::V1;
break;
case 'z': case 'Z': case '?':
bits[--idx] = verinum::Vz;
break;
case 'x': case 'X':
bits[--idx] = verinum::Vx;
break;
case '_':
break;
default:
fprintf(stderr, "%c\n", ptr[0]);
assert(0);
}
ptr += 1;
}
verinum*out = new verinum(bits, size);
out->has_sign(sign_flag);
delete[]bits;
return out;
}
static verinum*make_sized_octal(const char*txt)
{
bool sign_flag = false;
char*ptr;
unsigned size = strtoul(txt,&ptr,10);
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
assert(*ptr == '\'');
ptr += 1;
if (tolower(*ptr) == 's') {
sign_flag = true;
ptr += 1;
}
assert(tolower(*ptr) == 'o');
ptr += 1;
/* We know from the size number how bit to make the verinum
array, so make it now. */
verinum::V*bits = new verinum::V[(size+2)/3 * 3];
/* skip white space between size and the base token. */
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
/* Get a pointer to the last character of the number string,
then work back from there (the least significant digit)
forward until I run out of digits or space to put them. */
char*eptr = ptr + strlen(ptr) - 1;
unsigned idx = 0;
while ((eptr >= ptr) && (idx < size)) {
switch (*eptr) {
case 'x': case 'X':
bits[idx++] = verinum::Vx;
bits[idx++] = verinum::Vx;
bits[idx++] = verinum::Vx;
break;
case 'z': case 'Z': case '?':
bits[idx++] = verinum::Vz;
bits[idx++] = verinum::Vz;
bits[idx++] = verinum::Vz;
break;
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
{
unsigned val = *eptr - '0';
bits[idx++] = (val&1)? verinum::V1 : verinum::V0;
bits[idx++] = (val&2)? verinum::V1 : verinum::V0;
bits[idx++] = (val&4)? verinum::V1 : verinum::V0;
break;
}
case '_':
break;
default:
assert(0);
}
eptr -= 1;
}
/* If we filled up all the bits and there are still characters
in the number string, then we overflowed. Report a warning
that we are truncating. */
if ((idx >= size) && (eptr >= ptr))
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: Numeric octal constant ``" << ptr <<
"'' truncated to " << size << " bits." << endl;
/* If we did not fill up all the bits from the string, then
zero-extend the number. */
while (idx < size) switch (ptr[1]) {
case 'x': case 'X':
bits[idx++] = verinum::Vx;
break;
case 'z': case 'Z': case '?':
bits[idx++] = verinum::Vz;
break;
default:
bits[idx++] = verinum::V0;
}
verinum*out = new verinum(bits, size, true);
delete[]bits;
out->has_sign(sign_flag);
return out;
}
static verinum*make_unsized_octal(const char*txt)
{
bool sign_flag = false;
const char*ptr = txt;
assert(*ptr == '\'');
ptr += 1;
if (tolower(*ptr) == 's') {
sign_flag = true;
ptr += 1;
}
assert(tolower(*ptr) == 'o');
ptr += 1;
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
unsigned size = 0;
for (const char*idx = ptr ; *idx ; idx += 1)
if (*idx != '_') size += 3;
verinum::V*bits = new verinum::V[size];
unsigned idx = size;
while (*ptr) {
unsigned val;
switch (ptr[0]) {
case '0': case '1': case '2': case '3':
case '4': case '5': case '6': case '7':
val = *ptr - '0';
bits[--idx] = (val&4) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&2) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&1) ? verinum::V1 : verinum::V0;
break;
case 'x': case 'X':
bits[--idx] = verinum::Vx;
bits[--idx] = verinum::Vx;
bits[--idx] = verinum::Vx;
break;
case 'z': case 'Z': case '?':
bits[--idx] = verinum::Vz;
bits[--idx] = verinum::Vz;
bits[--idx] = verinum::Vz;
break;
case '_':
break;
default:
assert(0);
}
ptr += 1;
}
verinum*out = new verinum(bits, size);
out->has_sign(sign_flag);
delete[]bits;
return out;
}
static verinum*make_sized_hex(const char*txt)
{
bool sign_flag = false;
char*ptr;
unsigned size = strtoul(txt,&ptr,10);
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
assert(*ptr == '\'');
ptr += 1;
if (tolower(*ptr) == 's') {
sign_flag = true;
ptr += 1;
}
assert(tolower(*ptr) == 'h');
ptr += 1;
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
verinum::V*bits = new verinum::V[(size+3)&~3];
unsigned idx = 0;
char*eptr = ptr + strlen(ptr) - 1;
while ((eptr >= ptr) && (idx < size)) {
switch (*eptr) {
case 'x': case 'X':
bits[idx++] = verinum::Vx;
bits[idx++] = verinum::Vx;
bits[idx++] = verinum::Vx;
bits[idx++] = verinum::Vx;
break;
case 'z': case 'Z': case '?':
bits[idx++] = verinum::Vz;
bits[idx++] = verinum::Vz;
bits[idx++] = verinum::Vz;
bits[idx++] = verinum::Vz;
break;
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
{
unsigned val = tolower(*eptr) - 'a' + 10;
bits[idx++] = (val&1)? verinum::V1 : verinum::V0;
bits[idx++] = (val&2)? verinum::V1 : verinum::V0;
bits[idx++] = (val&4)? verinum::V1 : verinum::V0;
bits[idx++] = (val&8)? verinum::V1 : verinum::V0;
break;
}
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
{
unsigned val = *eptr - '0';
bits[idx++] = (val&1)? verinum::V1 : verinum::V0;
bits[idx++] = (val&2)? verinum::V1 : verinum::V0;
bits[idx++] = (val&4)? verinum::V1 : verinum::V0;
bits[idx++] = (val&8)? verinum::V1 : verinum::V0;
break;
}
case '_':
break;
default:
assert(0);
}
eptr -= 1;
}
/* If we filled up the expected number of bits, but there are
still characters of the number part left, then report a
warning that we are truncating. */
if ((idx >= size) && (eptr >= ptr))
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: Numeric hex constant ``" << ptr <<
"'' truncated to " << size << " bits." << endl;
// zero extend hex numbers
while (idx < size) switch (ptr[1]) {
case 'x': case 'X':
bits[idx++] = verinum::Vx;
break;
case 'z': case 'Z': case '?':
bits[idx++] = verinum::Vz;
break;
default:
bits[idx++] = verinum::V0;
}
verinum*out = new verinum(bits, size, true);
out->has_sign(sign_flag);
delete[]bits;
return out;
}
static verinum*make_unsized_hex(const char*txt)
{
bool sign_flag = false;
const char*ptr = txt;
assert(*ptr == '\'');
ptr += 1;
if (tolower(*ptr) == 's') {
sign_flag = true;
ptr += 1;
}
assert(tolower(*ptr) == 'h');
ptr += 1;
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
unsigned size = 0;
for (const char*idx = ptr ; *idx ; idx += 1)
if (*idx != '_') size += 4;
verinum::V*bits = new verinum::V[size];
unsigned idx = size;
while (*ptr) {
unsigned val;
switch (ptr[0]) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
val = *ptr - '0';
bits[--idx] = (val&8) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&4) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&2) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&1) ? verinum::V1 : verinum::V0;
break;
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
val = tolower(*ptr) - 'a' + 10;
bits[--idx] = (val&8) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&4) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&2) ? verinum::V1 : verinum::V0;
bits[--idx] = (val&1) ? verinum::V1 : verinum::V0;
break;
case 'x': case 'X':
bits[--idx] = verinum::Vx;
bits[--idx] = verinum::Vx;
bits[--idx] = verinum::Vx;
bits[--idx] = verinum::Vx;
break;
case 'z': case 'Z': case '?':
bits[--idx] = verinum::Vz;
bits[--idx] = verinum::Vz;
bits[--idx] = verinum::Vz;
bits[--idx] = verinum::Vz;
break;
case '_':
break;
default:
assert(0);
}
ptr += 1;
}
verinum*out = new verinum(bits, size);
out->has_sign(sign_flag);
delete[]bits;
return out;
}
/*
* Making a decimal number is much easier then the other base numbers
* because there are no z or x values to worry about.
*/
static verinum*make_dec_with_size(unsigned size, bool fixed, const char*ptr)
{
bool signed_flag = false;
if (tolower(*ptr) == 's') {
signed_flag = true;
ptr += 1;
}
assert(tolower(*ptr) == 'd');
ptr += 1;
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
const char*digits = ptr;
/* Convert the decimal number to a binary value, one digit at
a time. Watch out for overflow. */
unsigned long value = 0;
for ( ; *ptr ; ptr += 1)
if (isdigit(*ptr)) {
unsigned long tmp = value * 10 + (*ptr - '0');
if (tmp < value)
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: Numeric decimal constant ``"
<< digits << "'' is too large." << endl;
value *= 10;
value += *ptr - '0';
} else {
assert(*ptr == '_');
}
verinum::V*bits = new verinum::V[size];
for (unsigned idx = 0 ; idx < size ; idx += 1) {
bits[idx] = (value&1)? verinum::V1 : verinum::V0;
value /= 2;
}
/* If we run out of bits to hold the value, but there are
still valueable bits in the number, print a warning. */
if (value != 0)
cerr << yylloc.text << ":" << yylloc.first_line <<
": warning: Numeric decimal constant ``" << digits <<
"'' truncated to " << size << " bits." << endl;
verinum*out = new verinum(bits, size, fixed);
out->has_sign(signed_flag);
delete[]bits;
return out;
}
static verinum*make_sized_dec(const char*txt)
{
char*ptr;
unsigned size = strtoul(txt,&ptr,10);
while (*ptr && ((*ptr == ' ') || (*ptr == '\t')))
ptr += 1;
assert(*ptr == '\'');
ptr += 1;
return make_dec_with_size(size, true, ptr);
}
static verinum*make_unsized_dec(const char*txt)
{
return make_dec_with_size(INTEGER_WIDTH, false, txt+1);
}
/*
* The timescale parameter has the form:
* " <num> xs / <num> xs"
*/
static void process_timescale(const char*txt)
{
unsigned num;
const char*cp = txt + strspn(txt, " \t");
char*tmp;
const char*ctmp;
int unit = 0;
int prec = 0;
num = strtoul(cp, &tmp, 10);
if (num == 0) {
VLerror(yylloc, "Invalid timescale string.");
return;
}
while (num >= 10) {
unit += 1;
num /= 10;
}
if (num != 1) {
VLerror(yylloc, "Invalid timescale unit number.");
return;
}
cp = tmp;
cp += strspn(cp, " \t");
ctmp = cp + strcspn(cp, " \t/");
if (strncmp("s", cp, ctmp-cp) == 0) {
unit -= 0;
} else if (strncmp("ms", cp, ctmp-cp) == 0) {
unit -= 3;
} else if (strncmp("us", cp, ctmp-cp) == 0) {
unit -= 6;
} else if (strncmp("ns", cp, ctmp-cp) == 0) {
unit -= 9;
} else if (strncmp("ps", cp, ctmp-cp) == 0) {
unit -= 12;
} else if (strncmp("fs", cp, ctmp-cp) == 0) {
unit -= 15;
} else {
VLerror(yylloc, "Invalid timescale unit of measurement");
return;
}
cp = ctmp;
cp += strspn(cp, " \t/");
num = strtoul(cp, &tmp, 10);
if (num == 0) {
VLerror(yylloc, "Invalid timescale string.");
return;
}
assert(num);
while (num >= 10) {
prec += 1;
num /= 10;
}
if (num != 1) {
VLerror(yylloc, "Invalid timescale precision number.");
return;
}
cp = tmp;
cp += strspn(cp, " \t");
ctmp = cp + strcspn(cp, " \t\r");
if (strncmp("s", cp, ctmp-cp) == 0) {
prec -= 0;
} else if (strncmp("ms", cp, ctmp-cp) == 0) {
prec -= 3;
} else if (strncmp("us", cp, ctmp-cp) == 0) {
prec -= 6;
} else if (strncmp("ns", cp, ctmp-cp) == 0) {
prec -= 9;
} else if (strncmp("ps", cp, ctmp-cp) == 0) {
prec -= 12;
} else if (strncmp("fs", cp, ctmp-cp) == 0) {
prec -= 15;
} else {
VLerror(yylloc, "Invalid timescale precision units of measurement");
return;
}
pform_set_timescale(unit, prec);
}
int yywrap()
{
return 1;
}