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Revert "add MUX support"

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It turns out that they make everything worse and they don't PnR.

This reverts commit 3eff2271d0.
This commit is contained in:
Pepijn de Vos 2019-09-06 11:28:17 +02:00
parent 96efa63f16
commit 2fb20f184a
3 changed files with 0 additions and 17 deletions
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3
techlibs/gowin/cells_map.v
View file

@ -50,9 +50,6 @@ module \$__DFFE_PP0 (input D, C, R, E, output Q); DFFCE _TECHMAP_REPLACE_ (.D(D
module \$__DFFE_PN0 (input D, C, R, E, output Q); DFFCE _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C), .CLEAR(!R), .CE(E)); endmodule module \$__DFFE_PN0 (input D, C, R, E, output Q); DFFCE _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C), .CLEAR(!R), .CE(E)); endmodule
module \$_MUX_ (input A, B, S, output Y); MUX2 _TECHMAP_REPLACE_ (.I0(A), .I1(B), .S0(S), .O(Y)); endmodule
module \$_MUX4_ (input A, B, C, D, S, T, output Y); MUX4 _TECHMAP_REPLACE_ (.I0(A), .I1(B), .I2(C), .I3(D), .S0(S), .S1(T), .O(Y)); endmodule
module \$lut (A, Y); module \$lut (A, Y);
parameter WIDTH = 0; parameter WIDTH = 0;
parameter LUT = 0; parameter LUT = 0;

13
techlibs/gowin/cells_sim.v
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@ -24,19 +24,6 @@ module LUT4(output F, input I0, I1, I2, I3);
assign F = I0 ? s1[1] : s1[0]; assign F = I0 ? s1[1] : s1[0];
endmodule endmodule
module MUX2 (I0, I1, S0, O);
input I0, I1, S0;
output O;
assign O = S0 ? I1 : I0;
endmodule
module MUX4 (I0, I1, I2, I3, S0, S1, O);
input I0, I1, I2, I3, S0, S1;
output O;
assign O = S1 ? (S0 ? I3 : I2) :
(S0 ? I1 : I0);
endmodule
module DFF (output reg Q, input CLK, D); module DFF (output reg Q, input CLK, D);
parameter [0:0] INIT = 1'b0; parameter [0:0] INIT = 1'b0;
initial Q = INIT; initial Q = INIT;

1
techlibs/gowin/synth_gowin.cc
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@ -196,7 +196,6 @@ struct SynthGowinPass : public ScriptPass
run("opt_clean"); run("opt_clean");
if (!nodffe) if (!nodffe)
run("dff2dffe -direct-match $_DFF_* -direct-match $__DFFS_*"); run("dff2dffe -direct-match $_DFF_* -direct-match $__DFFS_*");
run("muxcover -mux4");
run("techmap -map +/gowin/cells_map.v"); run("techmap -map +/gowin/cells_map.v");
run("opt_expr -mux_undef"); run("opt_expr -mux_undef");
run("simplemap"); run("simplemap");