diff options
Diffstat (limited to 'tests/various')
| -rw-r--r-- | tests/various/muxcover.ys | 141 |
1 files changed, 140 insertions, 1 deletions
diff --git a/tests/various/muxcover.ys b/tests/various/muxcover.ys index 7ac460f13..8ef619b46 100644 --- a/tests/various/muxcover.ys +++ b/tests/various/muxcover.ys @@ -13,7 +13,7 @@ read_verilog -formal <<EOT EOT -## Examle usage for "pmuxtree" and "muxcover" +## Example usage for "pmuxtree" and "muxcover" proc pmuxtree @@ -49,3 +49,142 @@ hierarchy -top equiv equiv_simple -undef equiv_status -assert +## Partial matching MUX4 + +design -reset +read_verilog -formal <<EOT +module mux_if_bal_3_1 #(parameter N=3, parameter W=1) (input [N*W-1:0] i, input [$clog2(N)-1:0] s, output reg [W-1:0] o); +always @* begin + o <= {{W{{1'bx}}}}; + if (s[0] == 1'b0) + if (s[1] == 1'b0) + o <= i[0*W+:W]; + else + o <= i[1*W+:W]; + else + if (s[1] == 1'b0) + o <= i[2*W+:W]; +end +endmodule +EOT +prep +design -save gold + +techmap +muxcover -mux4=150 +select -assert-count 0 t:$_MUX_ +select -assert-count 1 t:$_MUX4_ +select -assert-count 0 t:$_MUX8_ +select -assert-count 0 t:$_MUX16_ +techmap -map +/simcells.v t:$_MUX4_ +design -stash gate + +design -import gold -as gold +design -import gate -as gate + +miter -equiv -flatten -make_assert -make_outputs gold gate miter +sat -verify -prove-asserts -show-ports miter + +## Partial matching MUX8 + +design -reset +read_verilog -formal <<EOT +module mux_if_bal_5_1 #(parameter N=5, parameter W=1) (input [N*W-1:0] i, input [$clog2(N)-1:0] s, output reg [W-1:0] o); +always @* begin + o <= {{W{{1'bx}}}}; + if (s[0] == 1'b0) + if (s[1] == 1'b0) + if (s[2] == 1'b0) + o <= i[0*W+:W]; + else + o <= i[1*W+:W]; + else + if (s[2] == 1'b0) + o <= i[2*W+:W]; + else + o <= i[3*W+:W]; + else + if (s[1] == 1'b0) + if (s[2] == 1'b0) + o <= i[4*W+:W]; +end +endmodule +EOT +prep +design -save gold + +techmap +muxcover -mux4=150 -mux8=200 +clean +opt_expr -mux_bool +select -assert-count 0 t:$_MUX_ +select -assert-count 0 t:$_MUX4_ +select -assert-count 1 t:$_MUX8_ +select -assert-count 0 t:$_MUX16_ +techmap -map +/simcells.v t:$_MUX8_ +design -stash gate + +design -import gold -as gold +design -import gate -as gate + +miter -equiv -flatten -make_assert -make_outputs gold gate miter +sat -verify -prove-asserts -show-ports miter + +## Partial matching MUX16 + +design -reset +read_verilog -formal <<EOT +module mux_if_bal_9_1 #(parameter N=9, parameter W=1) (input [N*W-1:0] i, input [$clog2(N)-1:0] s, output reg [W-1:0] o); +always @* begin + o <= {{W{{1'bx}}}}; + if (s[0] == 1'b0) + if (s[1] == 1'b0) + if (s[2] == 1'b0) + if (s[3] == 1'b0) + o <= i[0*W+:W]; + else + o <= i[1*W+:W]; + else + if (s[3] == 1'b0) + o <= i[2*W+:W]; + else + o <= i[3*W+:W]; + else + if (s[2] == 1'b0) + if (s[3] == 1'b0) + o <= i[4*W+:W]; + else + o <= i[5*W+:W]; + else + if (s[3] == 1'b0) + o <= i[6*W+:W]; + else + o <= i[7*W+:W]; + else + if (s[1] == 1'b0) + if (s[2] == 1'b0) + if (s[3] == 1'b0) + o <= i[8*W+:W]; +end +endmodule +EOT +prep +design -save gold + +techmap +muxcover -mux4=150 -mux8=200 -mux16=250 +clean +opt_expr -mux_bool +select -assert-count 0 t:$_MUX_ +select -assert-count 0 t:$_MUX4_ +select -assert-count 0 t:$_MUX8_ +select -assert-count 1 t:$_MUX16_ +techmap -map +/simcells.v t:$_MUX16_ +design -stash gate + +design -import gold -as gold +design -import gate -as gate + +miter -equiv -flatten -make_assert -make_outputs gold gate miter +sat -verify -prove-asserts -show-ports miter + |