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Fixed abc pass blif parser for constant bits

This commit is contained in:
Clifford Wolf 2013-11-13 15:46:28 +01:00
parent 63060dcd2e
commit a694324a75
1 changed files with 57 additions and 18 deletions
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75
passes/abc/blifparse.cc
View File

@ -22,6 +22,28 @@
#include <stdio.h>
#include <string.h>
static bool read_next_line(char *buffer, int &line_count, FILE *f)
{
buffer[0] = 0;
while (1)
{
int buffer_len = strlen(buffer);
while (buffer_len > 0 && (buffer[buffer_len-1] == ' ' || buffer[buffer_len-1] == '\t' ||
buffer[buffer_len-1] == '\r' || buffer[buffer_len-1] == '\n'))
buffer[--buffer_len] = 0;
if (buffer_len == 0 || buffer[buffer_len-1] == '\\') {
if (buffer[buffer_len-1] == '\\')
buffer[--buffer_len] = 0;
line_count++;
if (fgets(buffer+buffer_len, 4096-buffer_len, f) == NULL)
return false;
} else
return true;
}
}
RTLIL::Design *abc_parse_blif(FILE *f)
{
RTLIL::Design *design = new RTLIL::Design;
@ -39,25 +61,10 @@ RTLIL::Design *abc_parse_blif(FILE *f)
while (1)
{
buffer[0] = 0;
while (1)
{
int buffer_len = strlen(buffer);
while (buffer_len > 0 && (buffer[buffer_len-1] == ' ' || buffer[buffer_len-1] == '\t' ||
buffer[buffer_len-1] == '\r' || buffer[buffer_len-1] == '\n'))
buffer[--buffer_len] = 0;
if (buffer_len == 0 || buffer[buffer_len-1] == '\\') {
if (buffer[buffer_len-1] == '\\')
buffer[--buffer_len] = 0;
line_count++;
if (fgets(buffer+buffer_len, 4096-buffer_len, f) == NULL)
goto error;
} else
break;
}
if (!read_next_line(buffer, line_count, f))
goto error;
continue_without_read:
if (buffer[0] == '#')
continue;
@ -112,6 +119,38 @@ RTLIL::Design *abc_parse_blif(FILE *f)
output_sig = input_sig.extract(input_sig.width-1, 1);
input_sig = input_sig.extract(0, input_sig.width-1);
if (input_sig.width == 0) {
RTLIL::State state = RTLIL::State::Sa;
while (1) {
if (!read_next_line(buffer, line_count, f))
goto error;
for (int i = 0; buffer[i]; i++) {
if (buffer[i] == ' ' || buffer[i] == '\t')
continue;
if (i == 0 && buffer[i] == '.')
goto finished_parsing_constval;
if (buffer[i] == '0') {
if (state == RTLIL::State::S1)
goto error;
state = RTLIL::State::S0;
continue;
}
if (buffer[i] == '1') {
if (state == RTLIL::State::S0)
goto error;
state = RTLIL::State::S1;
continue;
}
goto error;
}
}
finished_parsing_constval:
if (state == RTLIL::State::Sa)
state = RTLIL::State::S1;
module->connections.push_back(RTLIL::SigSig(output_sig, state));
goto continue_without_read;
}
input_sig.optimize();
output_sig.optimize();