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Optimize memory address port width in wreduce and memory_collect, not verilog front-end

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This commit is contained in:
Clifford Wolf 2016-08-19 18:38:25 +02:00
parent 9b8e06bee1
commit f6629b9c29
4 changed files with 44 additions and 7 deletions
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12
frontends/ast/genrtlil.cc
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@ -1253,13 +1253,15 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
int mem_width, mem_size, addr_bits;
id2ast->meminfo(mem_width, mem_size, addr_bits);
RTLIL::SigSpec addr_sig = children[0]->genRTLIL();
cell->setPort("\\CLK", RTLIL::SigSpec(RTLIL::State::Sx, 1));
cell->setPort("\\EN", RTLIL::SigSpec(RTLIL::State::Sx, 1));
cell->setPort("\\ADDR", children[0]->genWidthRTLIL(addr_bits));
cell->setPort("\\ADDR", addr_sig);
cell->setPort("\\DATA", RTLIL::SigSpec(wire));
cell->parameters["\\MEMID"] = RTLIL::Const(str);
cell->parameters["\\ABITS"] = RTLIL::Const(addr_bits);
cell->parameters["\\ABITS"] = RTLIL::Const(GetSize(addr_sig));
cell->parameters["\\WIDTH"] = RTLIL::Const(wire->width);
cell->parameters["\\CLK_ENABLE"] = RTLIL::Const(0);
@ -1290,11 +1292,13 @@ RTLIL::SigSpec AstNode::genRTLIL(int width_hint, bool sign_hint)
cell->parameters["\\WORDS"] = RTLIL::Const(num_words);
}
cell->setPort("\\ADDR", children[0]->genWidthRTLIL(addr_bits));
SigSpec addr_sig = children[0]->genRTLIL();
cell->setPort("\\ADDR", addr_sig);
cell->setPort("\\DATA", children[1]->genWidthRTLIL(current_module->memories[str]->width * num_words));
cell->parameters["\\MEMID"] = RTLIL::Const(str);
cell->parameters["\\ABITS"] = RTLIL::Const(addr_bits);
cell->parameters["\\ABITS"] = RTLIL::Const(GetSize(addr_sig));
cell->parameters["\\WIDTH"] = RTLIL::Const(current_module->memories[str]->width);
if (type == AST_MEMWR) {

5
frontends/ast/simplify.cc
View file

@ -1490,6 +1490,11 @@ skip_dynamic_range_lvalue_expansion:;
int mem_width, mem_size, addr_bits;
children[0]->id2ast->meminfo(mem_width, mem_size, addr_bits);
int addr_width_hint = -1;
bool addr_sign_hint = true;
children[0]->children[0]->children[0]->detectSignWidthWorker(addr_width_hint, addr_sign_hint);
addr_bits = std::max(addr_bits, addr_width_hint);
AstNode *wire_addr = new AstNode(AST_WIRE, new AstNode(AST_RANGE, mkconst_int(addr_bits-1, true), mkconst_int(0, true)));
wire_addr->str = id_addr;
current_ast_mod->children.push_back(wire_addr);