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acb993b27b
Wrap initial blocks with a NO_INIT so that tests for archs without register initialization feature don't fail.
52 lines
881 B
Verilog
52 lines
881 B
Verilog
module adff( input d, clk, clr, output reg q );
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`ifndef NO_INIT
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initial begin
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q = 0;
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end
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`endif
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always @( posedge clk, posedge clr )
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if ( clr )
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q <= 1'b0;
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else
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q <= d;
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endmodule
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module adffn( input d, clk, clr, output reg q );
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`ifndef NO_INIT
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initial begin
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q = 0;
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end
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`endif
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always @( posedge clk, negedge clr )
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if ( !clr )
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q <= 1'b0;
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else
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q <= d;
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endmodule
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module dffs( input d, clk, pre, clr, output reg q );
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`ifndef NO_INIT
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initial begin
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q = 0;
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end
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`endif
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always @( posedge clk )
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if ( pre )
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q <= 1'b1;
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else
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q <= d;
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endmodule
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module ndffnr( input d, clk, pre, clr, output reg q );
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`ifndef NO_INIT
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initial begin
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q = 0;
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end
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`endif
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always @( negedge clk )
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if ( !clr )
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q <= 1'b0;
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else
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q <= d;
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endmodule
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