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Added "wreduce -memx"

This commit is contained in:
Clifford Wolf 2016-08-20 12:52:50 +02:00
parent 15ef608453
commit d77a914683
2 changed files with 20 additions and 5 deletions
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17
passes/opt/wreduce.cc
View File

@ -366,15 +366,26 @@ struct WreducePass : public Pass {
log(" assign y = a + b + c + 1;\n");
log(" endmodule\n");
log("\n");
log("Options:\n");
log("\n");
log(" -memx\n");
log(" Do not change the width of memory address ports. Use this options in\n");
log(" flows that use the 'memory_memx' pass.\n");
log("\n");
}
virtual void execute(std::vector<std::string> args, Design *design)
{
WreduceConfig config;
bool opt_memx = false;
log_header(design, "Executing WREDUCE pass (reducing word size of cells).\n");
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++) {
if (args[argidx] == "-memx") {
opt_memx = true;
continue;
}
break;
}
extra_args(args, argidx, design);
@ -397,12 +408,12 @@ struct WreducePass : public Pass {
module->connect(sig, Const(0, GetSize(sig)));
}
}
if (c->type.in("$memrd", "$memwr", "$meminit")) {
if (!opt_memx && c->type.in("$memrd", "$memwr", "$meminit")) {
IdString memid = c->getParam("\\MEMID").decode_string();
RTLIL::Memory *mem = module->memories.at(memid);
if (mem->start_offset == 0) {
if (mem->start_offset >= 0) {
int cur_addrbits = c->getParam("\\ABITS").as_int();
int max_addrbits = ceil_log2(mem->size);
int max_addrbits = ceil_log2(mem->start_offset + mem->size);
if (cur_addrbits > max_addrbits) {
log("Removed top %d address bits (of %d) from memory %s port %s.%s (%s).\n",
cur_addrbits-max_addrbits, cur_addrbits,

8
techlibs/common/prep.cc
View File

@ -173,8 +173,12 @@ struct PrepPass : public ScriptPass
run("opt_clean");
run("check");
run("opt -keepdc");
if (!ifxmode)
run("wreduce");
if (!ifxmode) {
if (help_mode)
run("wreduce [-memx]");
else
run(memxmode ? "wreduce -memx" : "wreduce");
}
run("memory_dff" + (help_mode ? " [-nordff]" : memory_opts));
if (help_mode || memxmode)
run("memory_memx", "(if -memx)");