mirrors/yosys
3
0
Fork 0
mirror of https://github.com/YosysHQ/yosys synced 2025-04-14 21:08:47 +00:00
Code Activity

address review comments

Browse source
This commit is contained in:
Zachary Snow 2024-04-14 11:55:57 -04:00 committed by Martin Povišer
parent 73cf658996
commit ef9772bd8d
2 changed files with 15 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
frontends/ast/simplify.cc
View file

@ -1260,6 +1260,8 @@ bool AstNode::simplify(bool const_fold, int stage, int width_hint, bool sign_hin
}
if (type == AST_CELL) {
// when a module lookup is suggested, any port connection that is not a
// plain identifier will be indirected through a new wire
bool lookup_suggested = false;
for (AstNode *child : children) {
@ -1282,7 +1284,7 @@ bool AstNode::simplify(bool const_fold, int stage, int width_hint, bool sign_hin
continue;
}
if (elem->type == AST_MEMORY)
// need to determine is the is a read or wire
// need to determine is the is a read or write
lookup_suggested = true;
else if (elem->type == AST_WIRE && elem->is_signed && !value->children.empty())
// this may be a fully sliced signed wire which needs
@ -1295,9 +1297,12 @@ bool AstNode::simplify(bool const_fold, int stage, int width_hint, bool sign_hin
else if (value->type == AST_TO_UNSIGNED)
// inner expression may be signed by default
lookup_suggested = true;
else if (value->type == AST_CONCAT && value->children.size() == 1)
// concat of a single expression is equivalent to $unsigned
else if (value->type == AST_CONCAT) {
// concat of a single expression is equivalent to $unsigned;
// concats could also contain one or references to memories,
// which may ambiguously be reads or writes
lookup_suggested = true;
}
}
}

8
tests/simple/memwr_port_connection.sv
View file

@ -5,11 +5,17 @@ module producer(
endmodule
module top(
output logic [3:0] out0, out1
output logic [3:0] out0, out1, out2, out3
);
logic [3:0] v[1:0];
logic [1:0] u[1:0];
logic [1:0] t[1:0];
producer p0(v[0]);
producer p1({v[1]});
producer p2({u[1], u[0]});
producer p3({{t[1]}, {t[0]}});
assign out0 = v[0];
assign out1 = v[1];
assign out2 = {u[1], u[0]};
assign out3 = {t[1], t[0]};
endmodule