mirror of https://github.com/YosysHQ/yosys.git
86 lines
2.1 KiB
Plaintext
86 lines
2.1 KiB
Plaintext
# Single-bit $xnor
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read_verilog -noopt <<EOT
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module gold(input i, output o);
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assign o = 1'bx ~^ i;
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endmodule
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EOT
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select -assert-count 1 t:$xnor
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copy gold coarse
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copy gold fine
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copy gold coarse_keepdc
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copy gold fine_keepdc
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cd coarse
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opt_expr
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select -assert-none t:$xnor
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cd fine
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simplemap
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opt_expr
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select -assert-none c:t$_XNOR_
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cd
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miter -equiv -flatten -make_assert -make_outputs -ignore_gold_x gold coarse miter
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sat -verify -prove-asserts -show-ports -enable_undef miter
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miter -equiv -flatten -make_assert -make_outputs coarse fine miter2
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sat -verify -prove-asserts -show-ports -enable_undef miter2
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cd coarse_keepdc
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opt_expr -keepdc
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select -assert-count 1 c:*
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cd fine_keepdc
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simplemap
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opt_expr -keepdc
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select -assert-count 1 t:$_XOR_
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cd
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miter -equiv -flatten -make_assert -make_outputs gold coarse_keepdc miter3
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sat -verify -prove-asserts -show-ports -enable_undef miter3
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miter -equiv -flatten -make_assert -make_outputs coarse_keepdc fine_keepdc miter4
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sat -verify -prove-asserts -show-ports -enable_undef miter4
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# Multi-bit $xnor
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design -reset
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read_verilog -noopt <<EOT
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module gold(input i, output [6:0] o);
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assign o = {1'bx, 1'b0, 1'b0, 1'b1, 1'bx, 1'b1, i} ~^ {7{i}};
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endmodule
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EOT
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select -assert-count 1 t:$xnor
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copy gold coarse
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copy gold fine
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copy gold coarse_keepdc
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copy gold fine_keepdc
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cd coarse
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opt_expr -fine
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select -assert-count 1 t:$xnor # FIXME: Should be zero
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cd fine
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simplemap
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opt_expr
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select -assert-none t:$_XNOR_
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cd
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miter -equiv -flatten -make_assert -make_outputs -ignore_gold_x gold coarse miter
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sat -verify -prove-asserts -show-ports -enable_undef miter
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miter -equiv -flatten -make_assert -make_outputs coarse fine miter2
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sat -verify -prove-asserts -show-ports -enable_undef miter2
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cd coarse_keepdc
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opt_expr -keepdc -fine
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select -assert-count 2 t:$xnor $ FIXME: Should be one
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cd fine_keepdc
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simplemap
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opt_expr -keepdc
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select -assert-count t c:$_XOR_
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cd
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miter -equiv -flatten -make_assert -make_outputs gold coarse_keepdc miter3
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sat -verify -prove-asserts -show-ports -enable_undef -set-def in_i miter3
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miter -equiv -flatten -make_assert -make_outputs coarse_keepdc fine_keepdc miter4
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sat -verify -prove-asserts -show-ports -enable_undef miter4
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