From 092e923330ce23adffa7843a27bdba8a0b139e58 Mon Sep 17 00:00:00 2001 From: Xiretza Date: Wed, 17 Mar 2021 00:18:36 +0100 Subject: verilog: fix buf/not primitives with multiple outputs From IEEE1364-2005, section 7.3 buf and not gates: > These two logic gates shall have one input and one or more outputs. > The last terminal in the terminal list shall connect to the input of the > logic gate, and the other terminals shall connect to the outputs of > the logic gate. yosys does not follow this and instead interprets the first argument as the output, the second as the input and ignores the rest. --- tests/simple/verilog_primitives.v | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 tests/simple/verilog_primitives.v (limited to 'tests/simple') diff --git a/tests/simple/verilog_primitives.v b/tests/simple/verilog_primitives.v new file mode 100644 index 000000000..0ee07393b --- /dev/null +++ b/tests/simple/verilog_primitives.v @@ -0,0 +1,15 @@ +module verilog_primitives ( + input wire in1, in2, in3, + output wire out_buf0, out_buf1, out_buf2, out_buf3, out_buf4, + output wire out_not0, out_not1, out_not2, + output wire out_xnor +); + +buf u_buf0 (out_buf0, in1); +buf u_buf1 (out_buf1, out_buf2, out_buf3, out_buf4, in2); + +not u_not0 (out_not0, out_not1, out_not2, in1); + +xnor u_xnor0 (out_xnor, in1, in2, in3); + +endmodule -- cgit v1.2.3