From: Tobias Wölfel Date: Wed, 19 Jun 2019 10:47:48 +0000 (+0200) Subject: Unpacked array declaration using size X-Git-Tag: yosys-0.9~64^2~1^2 X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=8b8af10f5e612eb1a39320e20b2d1d6f1e7d45df;p=yosys.git Unpacked array declaration using size Allows fixed-sized array dimension specified by a single number. This commit is based on the work from PeterCrozier https://github.com/YosysHQ/yosys/pull/560. But is split out of the original work. --- diff --git a/frontends/verilog/verilog_parser.y b/frontends/verilog/verilog_parser.y index a034f9601..f77321f09 100644 --- a/frontends/verilog/verilog_parser.y +++ b/frontends/verilog/verilog_parser.y @@ -1385,7 +1385,13 @@ wire_name: node->children.push_back(rng); } node->type = AST_MEMORY; - node->children.push_back($2); + auto *rangeNode = $2; + if (rangeNode->type == AST_RANGE && rangeNode->children.size() == 1) { + // SV array size [n], rewrite as [n-1:0] + rangeNode->children[0] = new AstNode(AST_SUB, rangeNode->children[0], AstNode::mkconst_int(1, true)); + rangeNode->children.push_back(AstNode::mkconst_int(0, false)); + } + node->children.push_back(rangeNode); } if (current_function_or_task == NULL) { if (do_not_require_port_stubs && (node->is_input || node->is_output) && port_stubs.count(*$1) == 0) { diff --git a/tests/various/unpacked_arrays.sv b/tests/various/unpacked_arrays.sv new file mode 100644 index 000000000..2f4ed0d3f --- /dev/null +++ b/tests/various/unpacked_arrays.sv @@ -0,0 +1,4 @@ +module unpacked_arrays; + reg array_range [0:7]; + reg array_size [8]; +endmodule diff --git a/tests/various/unpacked_arrays.ys b/tests/various/unpacked_arrays.ys new file mode 100644 index 000000000..419152d9c --- /dev/null +++ b/tests/various/unpacked_arrays.ys @@ -0,0 +1,2 @@ +read_verilog -sv unpacked_arrays.sv +stat