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Merge pull request #1600 from YosysHQ/eddie/cleanup_ecp5 

Nitpick cleanup for ecp5
This commit is contained in:
Eddie Hung 2019-12-30 10:00:47 -08:00 committed by GitHub
parent 9e6632c40a 011f749ecf
commit ce6e4f6341
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 6 additions and 14 deletions
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12
techlibs/ecp5/cells_sim.v
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@ -1,5 +1,6 @@
// ---------------------------------------
(* lib_whitebox *)
module LUT4(input A, B, C, D, output Z);
parameter [15:0] INIT = 16'h0000;
wire [7:0] s3 = D ? INIT[15:8] : INIT[7:0];
@ -31,13 +32,8 @@ module CCU2C(
// First half
wire LUT4_0, LUT2_0;
`ifdef _ABC
assign LUT4_0 = INIT0[{D0, C0, B0, A0}];
assign LUT2_0 = INIT0[{2'b00, B0, A0}];
`else
LUT4 #(.INIT(INIT0)) lut4_0(.A(A0), .B(B0), .C(C0), .D(D0), .Z(LUT4_0));
LUT2 #(.INIT(INIT0[3:0])) lut2_0(.A(A0), .B(B0), .Z(LUT2_0));
`endif
wire gated_cin_0 = (INJECT1_0 == "YES") ? 1'b0 : CIN;
assign S0 = LUT4_0 ^ gated_cin_0;
@ -46,13 +42,8 @@ module CCU2C(
// Second half
wire LUT4_1, LUT2_1;
`ifdef _ABC
assign LUT4_1 = INIT1[{D1, C1, B1, A1}];
assign LUT2_1 = INIT1[{2'b00, B1, A1}];
`else
LUT4 #(.INIT(INIT1)) lut4_1(.A(A1), .B(B1), .C(C1), .D(D1), .Z(LUT4_1));
LUT2 #(.INIT(INIT1[3:0])) lut2_1(.A(A1), .B(B1), .Z(LUT2_1));
`endif
wire gated_cin_1 = (INJECT1_1 == "YES") ? 1'b0 : cout_0;
assign S1 = LUT4_1 ^ gated_cin_1;
@ -209,6 +200,7 @@ endmodule
// ---------------------------------------
(* lib_whitebox *)
module LUT2(input A, B, output Z);
parameter [3:0] INIT = 4'h0;
wire [1:0] s1 = B ? INIT[ 3:2] : INIT[1:0];

2
techlibs/ecp5/synth_ecp5.cc
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@ -230,7 +230,7 @@ struct SynthEcp5Pass : public ScriptPass
{
if (check_label("begin"))
{
run("read_verilog -D_ABC -lib +/ecp5/cells_sim.v +/ecp5/cells_bb.v");
run("read_verilog -lib +/ecp5/cells_sim.v +/ecp5/cells_bb.v");
run(stringf("hierarchy -check %s", help_mode ? "-top <top>" : top_opt.c_str()));
}

6
tests/arch/ecp5/mux.ys
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@ -39,8 +39,8 @@ proc
equiv_opt -assert -map +/ecp5/cells_sim.v synth_ecp5 # equivalency check
design -load postopt # load the post-opt design (otherwise equiv_opt loads the pre-opt design)
cd mux16 # Constrain all select calls below inside the top module
select -assert-count 8 t:L6MUX21
select -assert-count 26 t:LUT4
select -assert-count 12 t:PFUMX
select -assert-count 12 t:L6MUX21
select -assert-count 34 t:LUT4
select -assert-count 17 t:PFUMX
select -assert-none t:LUT4 t:L6MUX21 t:PFUMX %% t:* %D