Replaced sha1 implementation

This commit is contained in:
Clifford Wolf 2014-08-01 19:01:10 +02:00
parent 1e224506be
commit bd74ed7da4
8 changed files with 334 additions and 283 deletions

View File

@ -979,10 +979,6 @@ RTLIL::IdString AstModule::derive(RTLIL::Design *design, std::map<RTLIL::IdStrin
use_internal_line_num(); use_internal_line_num();
std::string para_info; std::string para_info;
std::vector<unsigned char> hash_data;
hash_data.insert(hash_data.end(), stripped_name.begin(), stripped_name.end());
hash_data.push_back(0);
AstNode *new_ast = ast->clone(); AstNode *new_ast = ast->clone();
int para_counter = 0; int para_counter = 0;
@ -999,10 +995,6 @@ RTLIL::IdString AstModule::derive(RTLIL::Design *design, std::map<RTLIL::IdStrin
para_info += stringf("%s=%s", child->str.c_str(), log_signal(RTLIL::SigSpec(parameters[para_id]))); para_info += stringf("%s=%s", child->str.c_str(), log_signal(RTLIL::SigSpec(parameters[para_id])));
delete child->children.at(0); delete child->children.at(0);
child->children[0] = AstNode::mkconst_bits(parameters[para_id].bits, (parameters[para_id].flags & RTLIL::CONST_FLAG_SIGNED) != 0); child->children[0] = AstNode::mkconst_bits(parameters[para_id].bits, (parameters[para_id].flags & RTLIL::CONST_FLAG_SIGNED) != 0);
hash_data.insert(hash_data.end(), child->str.begin(), child->str.end());
hash_data.push_back(0);
hash_data.insert(hash_data.end(), parameters[para_id].bits.begin(), parameters[para_id].bits.end());
hash_data.push_back(0xff);
parameters.erase(para_id); parameters.erase(para_id);
continue; continue;
} }
@ -1018,28 +1010,11 @@ RTLIL::IdString AstModule::derive(RTLIL::Design *design, std::map<RTLIL::IdStrin
std::string modname; std::string modname;
if (orig_parameters_n == 0) if (orig_parameters_n == 0)
{
modname = stripped_name; modname = stripped_name;
} else if (para_info.size() > 60)
modname = "$paramod$" + sha1(para_info) + stripped_name;
else else
if (para_info.size() > 60)
{
unsigned char hash[20];
unsigned char *hash_data2 = new unsigned char[hash_data.size()];
for (size_t i = 0; i < hash_data.size(); i++)
hash_data2[i] = hash_data[i];
sha1::calc(hash_data2, hash_data.size(), hash);
delete[] hash_data2;
char hexstring[41];
sha1::toHexString(hash, hexstring);
modname = "$paramod$" + std::string(hexstring) + stripped_name;
}
else
{
modname = "$paramod" + stripped_name + para_info; modname = "$paramod" + stripped_name + para_info;
}
if (!design->has(modname)) { if (!design->has(modname)) {
new_ast->str = modname; new_ast->str = modname;

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@ -1,185 +1,270 @@
/* /*
Copyright (c) 2011, Micael Hildenborg sha1.cpp - source code of
All rights reserved.
============
Redistribution and use in source and binary forms, with or without SHA-1 in C++
modification, are permitted provided that the following conditions are met: ============
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer. 100% Public Domain.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the Original C Code
documentation and/or other materials provided with the distribution. -- Steve Reid <steve@edmweb.com>
* Neither the name of Micael Hildenborg nor the Small changes to fit into bglibs
names of its contributors may be used to endorse or promote products -- Bruce Guenter <bruce@untroubled.org>
derived from this software without specific prior written permission. Translation to simpler C++ Code
-- Volker Grabsch <vog@notjusthosting.com>
THIS SOFTWARE IS PROVIDED BY Micael Hildenborg ''AS IS'' AND ANY */
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE #include "sha1.h"
DISCLAIMED. IN NO EVENT SHALL Micael Hildenborg BE LIABLE FOR ANY #include <sstream>
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES #include <iomanip>
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; #include <fstream>
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT /* Help macros */
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS #define SHA1_ROL(value, bits) (((value) << (bits)) | (((value) & 0xffffffff) >> (32 - (bits))))
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #define SHA1_BLK(i) (block[i&15] = SHA1_ROL(block[(i+13)&15] ^ block[(i+8)&15] ^ block[(i+2)&15] ^ block[i&15],1))
*/
/* (R0+R1), R2, R3, R4 are the different operations used in SHA1 */
/* #define SHA1_R0(v,w,x,y,z,i) z += ((w&(x^y))^y) + block[i] + 0x5a827999 + SHA1_ROL(v,5); w=SHA1_ROL(w,30);
Contributors: #define SHA1_R1(v,w,x,y,z,i) z += ((w&(x^y))^y) + SHA1_BLK(i) + 0x5a827999 + SHA1_ROL(v,5); w=SHA1_ROL(w,30);
Gustav #define SHA1_R2(v,w,x,y,z,i) z += (w^x^y) + SHA1_BLK(i) + 0x6ed9eba1 + SHA1_ROL(v,5); w=SHA1_ROL(w,30);
Several members in the gamedev.se forum. #define SHA1_R3(v,w,x,y,z,i) z += (((w|x)&y)|(w&x)) + SHA1_BLK(i) + 0x8f1bbcdc + SHA1_ROL(v,5); w=SHA1_ROL(w,30);
Gregory Petrosyan #define SHA1_R4(v,w,x,y,z,i) z += (w^x^y) + SHA1_BLK(i) + 0xca62c1d6 + SHA1_ROL(v,5); w=SHA1_ROL(w,30);
*/
SHA1::SHA1()
#include "sha1.h" {
reset();
namespace sha1 }
{
namespace // local
{ void SHA1::update(const std::string &s)
// Rotate an integer value to left. {
inline unsigned int rol(const unsigned int value, std::istringstream is(s);
const unsigned int steps) update(is);
{ }
return ((value << steps) | (value >> (32 - steps)));
}
void SHA1::update(std::istream &is)
// Sets the first 16 integers in the buffert to zero. {
// Used for clearing the W buffert. std::string rest_of_buffer;
inline void clearWBuffert(unsigned int* buffert) read(is, rest_of_buffer, BLOCK_BYTES - buffer.size());
{ buffer += rest_of_buffer;
for (int pos = 16; --pos >= 0;)
{ while (is)
buffert[pos] = 0; {
} uint32 block[BLOCK_INTS];
} buffer_to_block(buffer, block);
transform(block);
void innerHash(unsigned int* result, unsigned int* w) read(is, buffer, BLOCK_BYTES);
{ }
unsigned int a = result[0]; }
unsigned int b = result[1];
unsigned int c = result[2];
unsigned int d = result[3]; /*
unsigned int e = result[4]; * Add padding and return the message digest.
*/
int round = 0;
std::string SHA1::final()
#define sha1macro(func,val) \ {
{ \ /* Total number of hashed bits */
const unsigned int t = rol(a, 5) + (func) + e + val + w[round]; \ uint64 total_bits = (transforms*BLOCK_BYTES + buffer.size()) * 8;
e = d; \
d = c; \ /* Padding */
c = rol(b, 30); \ buffer += 0x80;
b = a; \ unsigned int orig_size = buffer.size();
a = t; \ while (buffer.size() < BLOCK_BYTES)
} {
buffer += (char)0x00;
while (round < 16) }
{
sha1macro((b & c) | (~b & d), 0x5a827999) uint32 block[BLOCK_INTS];
++round; buffer_to_block(buffer, block);
}
while (round < 20) if (orig_size > BLOCK_BYTES - 8)
{ {
w[round] = rol((w[round - 3] ^ w[round - 8] ^ w[round - 14] ^ w[round - 16]), 1); transform(block);
sha1macro((b & c) | (~b & d), 0x5a827999) for (unsigned int i = 0; i < BLOCK_INTS - 2; i++)
++round; {
} block[i] = 0;
while (round < 40) }
{ }
w[round] = rol((w[round - 3] ^ w[round - 8] ^ w[round - 14] ^ w[round - 16]), 1);
sha1macro(b ^ c ^ d, 0x6ed9eba1) /* Append total_bits, split this uint64 into two uint32 */
++round; block[BLOCK_INTS - 1] = total_bits;
} block[BLOCK_INTS - 2] = (total_bits >> 32);
while (round < 60) transform(block);
{
w[round] = rol((w[round - 3] ^ w[round - 8] ^ w[round - 14] ^ w[round - 16]), 1); /* Hex std::string */
sha1macro((b & c) | (b & d) | (c & d), 0x8f1bbcdc) std::ostringstream result;
++round; for (unsigned int i = 0; i < DIGEST_INTS; i++)
} {
while (round < 80) result << std::hex << std::setfill('0') << std::setw(8);
{ result << (digest[i] & 0xffffffff);
w[round] = rol((w[round - 3] ^ w[round - 8] ^ w[round - 14] ^ w[round - 16]), 1); }
sha1macro(b ^ c ^ d, 0xca62c1d6)
++round; /* Reset for next run */
} reset();
#undef sha1macro return result.str();
}
result[0] += a;
result[1] += b;
result[2] += c; std::string SHA1::from_file(const std::string &filename)
result[3] += d; {
result[4] += e; std::ifstream stream(filename.c_str(), std::ios::binary);
} SHA1 checksum;
} // namespace checksum.update(stream);
return checksum.final();
void calc(const void* src, const int bytelength, unsigned char* hash) }
{
// Init the result array.
unsigned int result[5] = { 0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0 }; void SHA1::reset()
{
// Cast the void src pointer to be the byte array we can work with. /* SHA1 initialization constants */
const unsigned char* sarray = (const unsigned char*) src; digest[0] = 0x67452301;
digest[1] = 0xefcdab89;
// The reusable round buffer digest[2] = 0x98badcfe;
unsigned int w[80]; digest[3] = 0x10325476;
digest[4] = 0xc3d2e1f0;
// Loop through all complete 64byte blocks.
const int endOfFullBlocks = bytelength - 64; /* Reset counters */
int endCurrentBlock; transforms = 0;
int currentBlock = 0; buffer = "";
}
while (currentBlock <= endOfFullBlocks)
{
endCurrentBlock = currentBlock + 64; /*
* Hash a single 512-bit block. This is the core of the algorithm.
// Init the round buffer with the 64 byte block data. */
for (int roundPos = 0; currentBlock < endCurrentBlock; currentBlock += 4)
{ void SHA1::transform(uint32 block[BLOCK_BYTES])
// This line will swap endian on big endian and keep endian on little endian. {
w[roundPos++] = (unsigned int) sarray[currentBlock + 3] /* Copy digest[] to working vars */
| (((unsigned int) sarray[currentBlock + 2]) << 8) uint32 a = digest[0];
| (((unsigned int) sarray[currentBlock + 1]) << 16) uint32 b = digest[1];
| (((unsigned int) sarray[currentBlock]) << 24); uint32 c = digest[2];
} uint32 d = digest[3];
innerHash(result, w); uint32 e = digest[4];
}
// Handle the last and not full 64 byte block if existing. /* 4 rounds of 20 operations each. Loop unrolled. */
endCurrentBlock = bytelength - currentBlock; SHA1_R0(a,b,c,d,e, 0);
clearWBuffert(w); SHA1_R0(e,a,b,c,d, 1);
int lastBlockBytes = 0; SHA1_R0(d,e,a,b,c, 2);
for (;lastBlockBytes < endCurrentBlock; ++lastBlockBytes) SHA1_R0(c,d,e,a,b, 3);
{ SHA1_R0(b,c,d,e,a, 4);
w[lastBlockBytes >> 2] |= (unsigned int) sarray[lastBlockBytes + currentBlock] << ((3 - (lastBlockBytes & 3)) << 3); SHA1_R0(a,b,c,d,e, 5);
} SHA1_R0(e,a,b,c,d, 6);
w[lastBlockBytes >> 2] |= 0x80 << ((3 - (lastBlockBytes & 3)) << 3); SHA1_R0(d,e,a,b,c, 7);
if (endCurrentBlock >= 56) SHA1_R0(c,d,e,a,b, 8);
{ SHA1_R0(b,c,d,e,a, 9);
innerHash(result, w); SHA1_R0(a,b,c,d,e,10);
clearWBuffert(w); SHA1_R0(e,a,b,c,d,11);
} SHA1_R0(d,e,a,b,c,12);
w[15] = bytelength << 3; SHA1_R0(c,d,e,a,b,13);
innerHash(result, w); SHA1_R0(b,c,d,e,a,14);
SHA1_R0(a,b,c,d,e,15);
// Store hash in result pointer, and make sure we get in in the correct order on both endian models. SHA1_R1(e,a,b,c,d,16);
for (int hashByte = 20; --hashByte >= 0;) SHA1_R1(d,e,a,b,c,17);
{ SHA1_R1(c,d,e,a,b,18);
hash[hashByte] = (result[hashByte >> 2] >> (((3 - hashByte) & 0x3) << 3)) & 0xff; SHA1_R1(b,c,d,e,a,19);
} SHA1_R2(a,b,c,d,e,20);
} SHA1_R2(e,a,b,c,d,21);
SHA1_R2(d,e,a,b,c,22);
void toHexString(const unsigned char* hash, char* hexstring) SHA1_R2(c,d,e,a,b,23);
{ SHA1_R2(b,c,d,e,a,24);
const char hexDigits[] = { "0123456789abcdef" }; SHA1_R2(a,b,c,d,e,25);
SHA1_R2(e,a,b,c,d,26);
for (int hashByte = 20; --hashByte >= 0;) SHA1_R2(d,e,a,b,c,27);
{ SHA1_R2(c,d,e,a,b,28);
hexstring[hashByte << 1] = hexDigits[(hash[hashByte] >> 4) & 0xf]; SHA1_R2(b,c,d,e,a,29);
hexstring[(hashByte << 1) + 1] = hexDigits[hash[hashByte] & 0xf]; SHA1_R2(a,b,c,d,e,30);
} SHA1_R2(e,a,b,c,d,31);
hexstring[40] = 0; SHA1_R2(d,e,a,b,c,32);
} SHA1_R2(c,d,e,a,b,33);
} // namespace sha1 SHA1_R2(b,c,d,e,a,34);
SHA1_R2(a,b,c,d,e,35);
SHA1_R2(e,a,b,c,d,36);
SHA1_R2(d,e,a,b,c,37);
SHA1_R2(c,d,e,a,b,38);
SHA1_R2(b,c,d,e,a,39);
SHA1_R3(a,b,c,d,e,40);
SHA1_R3(e,a,b,c,d,41);
SHA1_R3(d,e,a,b,c,42);
SHA1_R3(c,d,e,a,b,43);
SHA1_R3(b,c,d,e,a,44);
SHA1_R3(a,b,c,d,e,45);
SHA1_R3(e,a,b,c,d,46);
SHA1_R3(d,e,a,b,c,47);
SHA1_R3(c,d,e,a,b,48);
SHA1_R3(b,c,d,e,a,49);
SHA1_R3(a,b,c,d,e,50);
SHA1_R3(e,a,b,c,d,51);
SHA1_R3(d,e,a,b,c,52);
SHA1_R3(c,d,e,a,b,53);
SHA1_R3(b,c,d,e,a,54);
SHA1_R3(a,b,c,d,e,55);
SHA1_R3(e,a,b,c,d,56);
SHA1_R3(d,e,a,b,c,57);
SHA1_R3(c,d,e,a,b,58);
SHA1_R3(b,c,d,e,a,59);
SHA1_R4(a,b,c,d,e,60);
SHA1_R4(e,a,b,c,d,61);
SHA1_R4(d,e,a,b,c,62);
SHA1_R4(c,d,e,a,b,63);
SHA1_R4(b,c,d,e,a,64);
SHA1_R4(a,b,c,d,e,65);
SHA1_R4(e,a,b,c,d,66);
SHA1_R4(d,e,a,b,c,67);
SHA1_R4(c,d,e,a,b,68);
SHA1_R4(b,c,d,e,a,69);
SHA1_R4(a,b,c,d,e,70);
SHA1_R4(e,a,b,c,d,71);
SHA1_R4(d,e,a,b,c,72);
SHA1_R4(c,d,e,a,b,73);
SHA1_R4(b,c,d,e,a,74);
SHA1_R4(a,b,c,d,e,75);
SHA1_R4(e,a,b,c,d,76);
SHA1_R4(d,e,a,b,c,77);
SHA1_R4(c,d,e,a,b,78);
SHA1_R4(b,c,d,e,a,79);
/* Add the working vars back into digest[] */
digest[0] += a;
digest[1] += b;
digest[2] += c;
digest[3] += d;
digest[4] += e;
/* Count the number of transformations */
transforms++;
}
void SHA1::buffer_to_block(const std::string &buffer, uint32 block[BLOCK_BYTES])
{
/* Convert the std::string (byte buffer) to a uint32 array (MSB) */
for (unsigned int i = 0; i < BLOCK_INTS; i++)
{
block[i] = (buffer[4*i+3] & 0xff)
| (buffer[4*i+2] & 0xff)<<8
| (buffer[4*i+1] & 0xff)<<16
| (buffer[4*i+0] & 0xff)<<24;
}
}
void SHA1::read(std::istream &is, std::string &s, int max)
{
char sbuf[max];
is.read(sbuf, max);
s.assign(sbuf, is.gcount());
}
std::string sha1(const std::string &string)
{
SHA1 checksum;
checksum.update(string);
return checksum.final();
}

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@ -1,49 +1,57 @@
/* /*
Copyright (c) 2011, Micael Hildenborg sha1.h - header of
All rights reserved.
============
Redistribution and use in source and binary forms, with or without SHA-1 in C++
modification, are permitted provided that the following conditions are met: ============
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer. 100% Public Domain.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the Original C Code
documentation and/or other materials provided with the distribution. -- Steve Reid <steve@edmweb.com>
* Neither the name of Micael Hildenborg nor the Small changes to fit into bglibs
names of its contributors may be used to endorse or promote products -- Bruce Guenter <bruce@untroubled.org>
derived from this software without specific prior written permission. Translation to simpler C++ Code
-- Volker Grabsch <vog@notjusthosting.com>
THIS SOFTWARE IS PROVIDED BY Micael Hildenborg ''AS IS'' AND ANY */
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE #ifndef SHA1_HPP
DISCLAIMED. IN NO EVENT SHALL Micael Hildenborg BE LIABLE FOR ANY #define SHA1_HPP
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND #include <iostream>
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT #include <string>
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. class SHA1
*/ {
public:
#ifndef SHA1_DEFINED SHA1();
#define SHA1_DEFINED void update(const std::string &s);
void update(std::istream &is);
namespace sha1 std::string final();
{ static std::string from_file(const std::string &filename);
/** private:
@param src points to any kind of data to be hashed. typedef unsigned long int uint32; /* just needs to be at least 32bit */
@param bytelength the number of bytes to hash from the src pointer. typedef unsigned long long uint64; /* just needs to be at least 64bit */
@param hash should point to a buffer of at least 20 bytes of size for storing the sha1 result in.
*/ static const unsigned int DIGEST_INTS = 5; /* number of 32bit integers per SHA1 digest */
void calc(const void* src, const int bytelength, unsigned char* hash); static const unsigned int BLOCK_INTS = 16; /* number of 32bit integers per SHA1 block */
static const unsigned int BLOCK_BYTES = BLOCK_INTS * 4;
/**
@param hash is 20 bytes of sha1 hash. This is the same data that is the result from the calc function. uint32 digest[DIGEST_INTS];
@param hexstring should point to a buffer of at least 41 bytes of size for storing the hexadecimal representation of the hash. A zero will be written at position 40, so the buffer will be a valid zero ended string. std::string buffer;
*/ uint64 transforms;
void toHexString(const unsigned char* hash, char* hexstring);
void reset();
} // namespace sha1 void transform(uint32 block[BLOCK_BYTES]);
#endif // SHA1_DEFINED static void buffer_to_block(const std::string &buffer, uint32 block[BLOCK_BYTES]);
static void read(std::istream &is, std::string &s, int max);
};
std::string sha1(const std::string &string);
#endif /* SHA1_HPP */

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@ -6,9 +6,9 @@ with Yosys.
\section{SHA1} \section{SHA1}
The files in {\tt libs/sha1/} provide a SHA1 implementation written by Micael The files in {\tt libs/sha1/} provide a public domain SHA1 implementation written
Hildenborg \citeweblink{smallsha1}. It is used for generating unique names when by Steve Reid, Bruce Guenter, and Volker Grabsch. It is used for generating
specializing parameterized modules. unique names when specializing parameterized modules.
\section{BigInt} \section{BigInt}

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@ -132,9 +132,3 @@
note = {\url{http://mattmccutchen.net/bigint/}} note = {\url{http://mattmccutchen.net/bigint/}}
} }
@misc{smallsha1,
author = {Micael Hildenborg},
title = {{smallsha1}},
note = {\url{https://code.google.com/p/smallsha1/}}
}

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@ -22,7 +22,6 @@
#include "kernel/sigtools.h" #include "kernel/sigtools.h"
#include "kernel/log.h" #include "kernel/log.h"
#include "kernel/celltypes.h" #include "kernel/celltypes.h"
#include "libs/sha1/sha1.h"
#include <stdlib.h> #include <stdlib.h>
#include <stdio.h> #include <stdio.h>
#include <set> #include <set>

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@ -107,12 +107,7 @@ struct OptShareWorker
hash_string += "\n"; hash_string += "\n";
} }
unsigned char hash[20]; cell_hash_cache[cell] = sha1(hash_string);
char hash_hex_string[41];
sha1::calc(hash_string.c_str(), hash_string.size(), hash);
sha1::toHexString(hash, hash_hex_string);
cell_hash_cache[cell] = hash_hex_string;
return cell_hash_cache[cell]; return cell_hash_cache[cell];
} }
#endif #endif

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@ -99,12 +99,7 @@ struct TechmapWorker
connbits_map[bit] = std::pair<std::string, int>(conn.first, i);stringf("%s %d", log_id(conn.first), i, bit.data); connbits_map[bit] = std::pair<std::string, int>(conn.first, i);stringf("%s %d", log_id(conn.first), i, bit.data);
} }
unsigned char hash[20]; return stringf("$paramod$constmap:%s%s", sha1(constmap_info).c_str(), tpl->name.c_str());
char hash_hex_string[41];
sha1::calc(constmap_info.c_str(), constmap_info.size(), hash);
sha1::toHexString(hash, hash_hex_string);
return stringf("$paramod$constmap$%s%s", hash_hex_string, tpl->name.c_str());
} }
TechmapWires techmap_find_special_wires(RTLIL::Module *module) TechmapWires techmap_find_special_wires(RTLIL::Module *module)