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-rw-r--r--passes/abc/abc.cc114
1 files changed, 75 insertions, 39 deletions
diff --git a/passes/abc/abc.cc b/passes/abc/abc.cc
index efba4359..b3050ef0 100644
--- a/passes/abc/abc.cc
+++ b/passes/abc/abc.cc
@@ -29,6 +29,11 @@
// Kahn, Arthur B. (1962), "Topological sorting of large networks", Communications of the ACM 5 (11): 558–562, doi:10.1145/368996.369025
// http://en.wikipedia.org/wiki/Topological_sorting
+#define ABC_COMMAND_LIB "strash; balance; dch; map; topo"
+#define ABC_COMMAND_CTR "strash; balance; dch; map; topo; buffer; upsize; dnsize; stime"
+#define ABC_COMMAND_LUT "strash; balance; dch; if"
+#define ABC_COMMAND_DFL "strash; balance; dch; map"
+
#include "kernel/register.h"
#include "kernel/sigtools.h"
#include "kernel/log.h"
@@ -375,6 +380,25 @@ static void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std
if (p == NULL)
log_error("For some reason mkdtemp() failed!\n");
+ std::string abc_command;
+ if (!script_file.empty()) {
+ if (script_file[0] == '+') {
+ for (size_t i = 1; i < script_file.size(); i++)
+ if (script_file[i] == '\'')
+ abc_command += "'\\''";
+ else if (script_file[i] == ',')
+ abc_command += " ";
+ else
+ abc_command += script_file[i];
+ } else
+ abc_command = stringf("source %s", script_file.c_str());
+ } else if (lut_mode)
+ abc_command = ABC_COMMAND_LUT;
+ else if (!liberty_file.empty())
+ abc_command = constr_file.empty() ? ABC_COMMAND_LIB : ABC_COMMAND_CTR;
+ else
+ abc_command = ABC_COMMAND_DFL;
+
if (clk_str.empty()) {
if (clk_str[0] == '!') {
clk_polarity = false;
@@ -538,46 +562,33 @@ static void abc_module(RTLIL::Design *design, RTLIL::Module *current_module, std
free(p);
}
- char buffer[1024];
- int buffer_pos = 0;
+ std::string buffer;
if (!liberty_file.empty()) {
- buffer_pos += snprintf(buffer+buffer_pos, 1024-buffer_pos,
- "%s -s -c 'read_blif %s/input.blif; read_lib %s; ",
+ buffer += stringf("%s -s -c 'read_blif %s/input.blif; read_lib %s; ",
exe_file.c_str(), tempdir_name, liberty_file.c_str());
if (!constr_file.empty())
- buffer_pos += snprintf(buffer+buffer_pos, 1024-buffer_pos,
- "read_constr %s; ", constr_file.c_str());
- buffer_pos += snprintf(buffer+buffer_pos, 1024-buffer_pos,
- "strash; balance; dch; map; topo; ");
- if (!constr_file.empty())
- buffer_pos += snprintf(buffer+buffer_pos, 1024-buffer_pos,
- "buffer; upsize; dnsize; stime; ");
+ buffer += stringf("read_constr %s; ", constr_file.c_str());
+ buffer += abc_command + "; ";
} else
- if (!script_file.empty())
- buffer_pos += snprintf(buffer+buffer_pos, 1024-buffer_pos,
- "%s -s -c 'read_blif %s/input.blif; source %s; ",
- exe_file.c_str(), tempdir_name, script_file.c_str());
- else
if (lut_mode)
- buffer_pos += snprintf(buffer+buffer_pos, 1024-buffer_pos,
- "%s -s -c 'read_blif %s/input.blif; read_lut %s/lutdefs.txt; strash; balance; dch; if; ",
- exe_file.c_str(), tempdir_name, tempdir_name);
+ buffer += stringf("%s -s -c 'read_blif %s/input.blif; read_lut %s/lutdefs.txt; %s; ",
+ exe_file.c_str(), tempdir_name, tempdir_name, abc_command.c_str());
else
- buffer_pos += snprintf(buffer+buffer_pos, 1024-buffer_pos,
- "%s -s -c 'read_blif %s/input.blif; read_library %s/stdcells.genlib; strash; balance; dch; map; ",
- exe_file.c_str(), tempdir_name, tempdir_name);
- buffer_pos += snprintf(buffer+buffer_pos, 1024-buffer_pos, "write_blif %s/output.blif' 2>&1", tempdir_name);
+ buffer += stringf("%s -s -c 'read_blif %s/input.blif; read_library %s/stdcells.genlib; %s; ",
+ exe_file.c_str(), tempdir_name, tempdir_name, abc_command.c_str());
+ buffer += stringf("write_blif %s/output.blif' 2>&1", tempdir_name);
errno = ENOMEM; // popen does not set errno if memory allocation fails, therefore set it by hand
- f = popen(buffer, "r");
+ f = popen(buffer.c_str(), "r");
if (f == NULL)
- log_error("Opening pipe to `%s' for reading failed: %s\n", buffer, strerror(errno));
- while (fgets(buffer, 1024, f) != NULL)
- log("ABC: %s", buffer);
+ log_error("Opening pipe to `%s' for reading failed: %s\n", buffer.c_str(), strerror(errno));
+ char logbuf[1024];
+ while (fgets(logbuf, 1024, f) != NULL)
+ log("ABC: %s", logbuf);
errno = 0;
int ret = pclose(f);
if (ret < 0)
- log_error("Closing pipe to `%s' failed: %s\n", buffer, strerror(errno));
+ log_error("Closing pipe to `%s' failed: %s\n", buffer.c_str(), strerror(errno));
if (WEXITSTATUS(ret) != 0) {
switch (WEXITSTATUS(ret)) {
case 127: log_error("ABC: execution of command \"%s\" failed: Command not found\n", exe_file.c_str()); break;
@@ -801,14 +812,31 @@ struct AbcPass : public Pass {
log(" -script <file>\n");
log(" use the specified ABC script file instead of the default script.\n");
log("\n");
+ log(" if <file> starts with a plus sign (+), then the rest of the filename\n");
+ log(" string is interprated as the command string to be passed to ABC. the\n");
+ log(" leading plus sign is removed and all commas (,) in the string are\n");
+ log(" replaced with blanks before the string is passed to ABC.\n");
+ log("\n");
+ log(" if no -script parameter is given, the following scripts are used:\n");
+ log("\n");
+ log(" for -liberty without -constr:\n");
+ log(" %s\n", ABC_COMMAND_LIB);
+ log("\n");
+ log(" for -liberty with -constr:\n");
+ log(" %s\n", ABC_COMMAND_CTR);
+ log("\n");
+ log(" for -lut:\n");
+ log(" %s\n", ABC_COMMAND_LUT);
+ log("\n");
+ log(" otherwise:\n");
+ log(" %s\n", ABC_COMMAND_DFL);
+ log("\n");
log(" -liberty <file>\n");
log(" generate netlists for the specified cell library (using the liberty\n");
- log(" file format). Without this option, ABC is used to optimize the netlist\n");
- log(" but keeps using yosys's internal gate library. This option is ignored if\n");
- log(" the -script option is also used.\n");
+ log(" file format).\n");
log("\n");
log(" -constr <file>\n");
- log(" pass this file with timing constraints to ABC\n");
+ log(" pass this file with timing constraints to ABC. use with -liberty.\n");
log("\n");
log(" -lut <width>\n");
log(" generate netlist using luts of (max) the specified width.\n");
@@ -816,7 +844,7 @@ struct AbcPass : public Pass {
log(" -dff\n");
log(" also pass $_DFF_?_ cells through ABC (only one clock domain, if many\n");
log(" clock domains are present in a module, the one with the largest number\n");
- log(" of $dff cells in it is used)\n");
+ log(" of $_DFF_?_ cells in it is used)\n");
log("\n");
log(" -clk [!]<signal-name>\n");
log(" use the specified clock domain. (when this option is used in combination\n");
@@ -827,6 +855,9 @@ struct AbcPass : public Pass {
log(" when this option is used, the temporary files created by this pass\n");
log(" are not removed. this is useful for debugging.\n");
log("\n");
+ log("When neither -liberty nor -lut is used, the Yosys standard cell library is\n");
+ log("loaded into ABC before the ABC script is executed.\n");
+ log("\n");
log("This pass does not operate on modules with unprocessed processes in it.\n");
log("(I.e. the 'proc' pass should be used first to convert processes to netlists.)\n");
log("\n");
@@ -851,25 +882,25 @@ struct AbcPass : public Pass {
exe_file = args[++argidx];
continue;
}
- if (arg == "-script" && argidx+1 < args.size() && liberty_file.empty() && constr_file.empty()) {
+ if (arg == "-script" && argidx+1 < args.size()) {
script_file = args[++argidx];
- if (!script_file.empty() && script_file[0] != '/')
+ if (!script_file.empty() && script_file[0] != '/' && script_file[0] != '+')
script_file = std::string(pwd) + "/" + script_file;
continue;
}
- if (arg == "-liberty" && argidx+1 < args.size() && script_file.empty() && liberty_file.empty()) {
+ if (arg == "-liberty" && argidx+1 < args.size()) {
liberty_file = args[++argidx];
if (!liberty_file.empty() && liberty_file[0] != '/')
liberty_file = std::string(pwd) + "/" + liberty_file;
continue;
}
- if (arg == "-constr" && argidx+1 < args.size() && script_file.empty() && constr_file.empty()) {
+ if (arg == "-constr" && argidx+1 < args.size()) {
constr_file = args[++argidx];
if (!constr_file.empty() && constr_file[0] != '/')
constr_file = std::string(pwd) + "/" + constr_file;
continue;
}
- if (arg == "-lut" && argidx+1 < args.size() && lut_mode == 0) {
+ if (arg == "-lut" && argidx+1 < args.size()) {
lut_mode = atoi(args[++argidx].c_str());
continue;
}
@@ -877,7 +908,7 @@ struct AbcPass : public Pass {
dff_mode = true;
continue;
}
- if (arg == "-clk" && argidx+1 < args.size() && lut_mode == 0) {
+ if (arg == "-clk" && argidx+1 < args.size()) {
clk_str = args[++argidx];
continue;
}
@@ -890,6 +921,11 @@ struct AbcPass : public Pass {
free(pwd);
extra_args(args, argidx, design);
+ if (lut_mode != 0 && !liberty_file.empty())
+ log_cmd_error("Got -lut and -liberty! This two options are exclusive.\n");
+ if (!constr_file.empty() && liberty_file.empty())
+ log_cmd_error("Got -constr but no -liberty!\n");
+
for (auto &mod_it : design->modules)
if (design->selected(mod_it.second)) {
if (mod_it.second->processes.size() > 0)
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-25 14:01:21 +0000