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iopadmap: Emit tristate buffers with const OE for some edge cases.

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This commit is contained in:
Marcin Kościelnicki 2019-12-22 01:08:56 +01:00
parent 13a3041030
commit a24596def3
2 changed files with 88 additions and 20 deletions
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23
tests/techmap/iopadmap.ys
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@ -28,6 +28,20 @@ assign io = oe ? i : 1'bz;
assign o2 = io;
assign o3 = ~io;
endmodule
module f(output o, o2);
assign o = 1'bz;
endmodule
module g(inout io, output o);
assign o = io;
endmodule
module h(inout io, output o, input i);
assign io = i;
assign o = io;
endmodule
EOT
opt_clean
@ -97,3 +111,12 @@ select -assert-count 1 @oeb %co %co @iob %i
select -assert-count 1 @iob %co %co @o2b %i
select -assert-count 1 @iob %co %co t:$_NOT_ %i
select -assert-count 1 @o3b %ci %ci t:$_NOT_ %i
select -assert-count 2 f/t:obuft
select -assert-count 1 g/t:obuf
select -assert-count 1 g/t:iobuf
select -assert-count 1 h/t:ibuf
select -assert-count 1 h/t:iobuf
select -assert-count 1 h/t:obuf