diff options
Diffstat (limited to 'backends/verilog')
| -rw-r--r-- | backends/verilog/verilog_backend.cc | 38 |
1 files changed, 21 insertions, 17 deletions
diff --git a/backends/verilog/verilog_backend.cc b/backends/verilog/verilog_backend.cc index 6be26329a..80ad7cb90 100644 --- a/backends/verilog/verilog_backend.cc +++ b/backends/verilog/verilog_backend.cc @@ -533,16 +533,18 @@ bool dump_cell_expr(FILE *f, std::string indent, RTLIL::Cell *cell) { int width = cell->parameters["\\WIDTH"].as_int(); int s_width = cell->connections["\\S"].width; - std::string reg_name = cellname(cell); - fprintf(f, "%s" "reg [%d:0] %s;\n", indent.c_str(), width-1, reg_name.c_str()); + std::string func_name = cellname(cell); - dump_attributes(f, indent, cell->attributes); + fprintf(f, "%s" "function [%d:0] %s;\n", indent.c_str(), width-1, func_name.c_str()); + fprintf(f, "%s" " input [%d:0] a;\n", indent.c_str(), width-1); + fprintf(f, "%s" " input [%d:0] b;\n", indent.c_str(), s_width*width-1); + fprintf(f, "%s" " input [%d:0] s;\n", indent.c_str(), s_width-1); + + dump_attributes(f, indent + " ", cell->attributes); if (!noattr) - fprintf(f, "%s" "(* parallel_case *)\n", indent.c_str()); - fprintf(f, "%s" "always @*\n", indent.c_str()); - fprintf(f, "%s" " casez (", indent.c_str()); - dump_sigspec(f, cell->connections["\\S"]); - fprintf(f, noattr ? ") // synopsys parallel_case\n" : ")\n"); + fprintf(f, "%s" " (* parallel_case *)\n", indent.c_str()); + fprintf(f, "%s" " casez (s)", indent.c_str()); + fprintf(f, noattr ? " // synopsys parallel_case\n" : "\n"); for (int i = 0; i < s_width; i++) { @@ -552,22 +554,24 @@ bool dump_cell_expr(FILE *f, std::string indent, RTLIL::Cell *cell) fprintf(f, "%c", j == i ? '1' : cell->type == "$pmux_safe" ? '0' : '?'); fprintf(f, ":\n"); - fprintf(f, "%s" " %s = ", indent.c_str(), reg_name.c_str()); - - RTLIL::SigSpec s = cell->connections["\\B"].extract(i * width, width); - dump_sigspec(f, s); - fprintf(f, ";\n"); + fprintf(f, "%s" " %s = b[%d:%d];\n", indent.c_str(), func_name.c_str(), (i+1)*width-1, i*width); } fprintf(f, "%s" " default:\n", indent.c_str()); - fprintf(f, "%s" " %s = ", indent.c_str(), reg_name.c_str()); - dump_sigspec(f, cell->connections["\\A"]); - fprintf(f, ";\n"); + fprintf(f, "%s" " %s = a;\n", indent.c_str(), func_name.c_str()); fprintf(f, "%s" " endcase\n", indent.c_str()); + fprintf(f, "%s" "endfunction\n", indent.c_str()); + fprintf(f, "%s" "assign ", indent.c_str()); dump_sigspec(f, cell->connections["\\Y"]); - fprintf(f, " = %s;\n", reg_name.c_str()); + fprintf(f, " = %s(", func_name.c_str()); + dump_sigspec(f, cell->connections["\\A"]); + fprintf(f, ", "); + dump_sigspec(f, cell->connections["\\B"]); + fprintf(f, ", "); + dump_sigspec(f, cell->connections["\\S"]); + fprintf(f, ");\n"); return true; } |