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https://github.com/YosysHQ/yosys
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abc9_map.v to transform INIT=1 to INIT=0
This commit is contained in:
Eddie Hung
parent
258a34e6f1
commit
19bc429482
2 changed files with 292 additions and 118 deletions
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@ -71,27 +71,39 @@
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// state
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// (e) a special _TECHMAP_REPLACE_.$abc9_currQ wire that will be used for feedback
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// into the (combinatorial) FD* cell to facilitate clock-enable behaviour
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//
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// In order to perform sequential synthesis, `abc9' also requires that
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// the initial value of all flops be zero.
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module FDRE (output Q, input C, CE, D, R);
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parameter [0:0] INIT = 1'b0;
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parameter [0:0] IS_C_INVERTED = 1'b0;
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parameter [0:0] IS_D_INVERTED = 1'b0;
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parameter [0:0] IS_R_INVERTED = 1'b0;
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wire DD, QQ, $nextQ;
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generate if (INIT == 1'b1)
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assign DD = ~D, Q = ~QQ;
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else
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assign DD = D, Q = QQ;
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wire QQ, $nextQ;
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generate if (INIT == 1'b1) begin
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assign Q = ~QQ;
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FDSE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_S_INVERTED(IS_R_INVERTED)
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) _TECHMAP_REPLACE_ (
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.D(~D), .Q($nextQ), .C(C), .CE(CE), .S(R)
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);
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end
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else begin
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assign Q = QQ;
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FDRE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_R_INVERTED(IS_R_INVERTED)
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) _TECHMAP_REPLACE_ (
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.D(D), .Q($nextQ), .C(C), .CE(CE), .R(R)
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);
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end
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endgenerate
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FDRE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_R_INVERTED(IS_R_INVERTED)
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) _TECHMAP_REPLACE_ (
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.D(DD), .Q($nextQ), .C(C), .CE(CE), .R(R)
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);
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\$__ABC9_FF_ abc_dff (.D($nextQ), .Q(QQ));
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// Special signals
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@ -102,17 +114,24 @@ module FDRE (output Q, input C, CE, D, R);
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endmodule
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module FDRE_1 (output Q, input C, CE, D, R);
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parameter [0:0] INIT = 1'b0;
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wire DD, QQ, $nextQ;
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generate if (INIT == 1'b1)
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assign DD = ~D, Q = ~QQ;
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else
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assign DD = D, Q = QQ;
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wire QQ, $nextQ;
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generate if (INIT == 1'b1) begin
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assign Q = ~QQ;
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FDSE_1 #(
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.INIT(1'b0)
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) _TECHMAP_REPLACE_ (
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.D(~D), .Q($nextQ), .C(C), .CE(CE), .S(R)
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);
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end
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else begin
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assign Q = QQ;
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FDRE_1 #(
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.INIT(1'b0)
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) _TECHMAP_REPLACE_ (
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.D(D), .Q($nextQ), .C(C), .CE(CE), .R(R)
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);
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end
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endgenerate
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FDRE_1 #(
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.INIT(1'b0),
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) _TECHMAP_REPLACE_ (
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.D(DD), .Q($nextQ), .C(C), .CE(CE), .R(R)
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);
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\$__ABC9_FF_ abc_dff (.D($nextQ), .Q(QQ));
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// Special signals
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@ -127,25 +146,39 @@ module FDCE (output Q, input C, CE, D, CLR);
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parameter [0:0] IS_C_INVERTED = 1'b0;
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parameter [0:0] IS_D_INVERTED = 1'b0;
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parameter [0:0] IS_CLR_INVERTED = 1'b0;
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wire DD, QQ, $nextQ, $abc9_currQ;
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generate if (INIT == 1'b1)
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assign DD = ~D, Q = ~QQ;
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else
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assign DD = D, Q = QQ;
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endgenerate
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FDCE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_CLR_INVERTED(IS_CLR_INVERTED)
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) _TECHMAP_REPLACE_ (
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.D(DD), .Q($nextQ), .C(C), .CE(CE), .CLR(CLR)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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wire QQ, $nextQ, $abc9_currQ;
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generate if (INIT == 1'b1) begin
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assign Q = ~QQ;
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FDPE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_PRE_INVERTED(IS_CLR_INVERTED)
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) _TECHMAP_REPLACE_ (
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.D(~D), .Q($nextQ), .C(C), .CE(CE), .PRE(CLR)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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end
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else begin
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assign Q = QQ;
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FDCE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_CLR_INVERTED(IS_CLR_INVERTED)
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) _TECHMAP_REPLACE_ (
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.D(D), .Q($nextQ), .C(C), .CE(CE), .CLR(CLR)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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end endgenerate
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\$__ABC9_FF_ abc_dff (.D($nextQ), .Q($abc9_currQ));
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// Since this is an async flop, async behaviour is also dealt with
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// using the $_ABC9_ASYNC box by abc9_map.v
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@ -159,22 +192,32 @@ module FDCE (output Q, input C, CE, D, CLR);
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endmodule
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module FDCE_1 (output Q, input C, CE, D, CLR);
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parameter [0:0] INIT = 1'b0;
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wire DD, QQ, $nextQ, $abc9_currQ;
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generate if (INIT == 1'b1)
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assign DD = ~D, Q = ~QQ;
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else
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assign DD = D, Q = QQ;
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endgenerate
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FDCE_1 #(
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.INIT(1'b0)
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) _TECHMAP_REPLACE_ (
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.D(DD), .Q($nextQ), .C(C), .CE(CE), .CLR(CLR)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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generate if (INIT == 1'b1) begin
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assign Q = ~QQ;
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FDPE_1 #(
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.INIT(1'b0)
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) _TECHMAP_REPLACE_ (
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.D(~D), .Q($nextQ), .C(C), .CE(CE), .PRE(CLR)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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end
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else begin
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assign Q = QQ;
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FDCE_1 #(
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.INIT(1'b0)
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) _TECHMAP_REPLACE_ (
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.D(D), .Q($nextQ), .C(C), .CE(CE), .CLR(CLR)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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end endgenerate
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\$__ABC9_FF_ abc_dff (.D($nextQ), .Q($abc9_currQ));
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\$__ABC9_ASYNC abc_async (.A($abc9_currQ), .S(CLR), .Y(QQ));
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@ -190,25 +233,39 @@ module FDPE (output Q, input C, CE, D, PRE);
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parameter [0:0] IS_C_INVERTED = 1'b0;
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parameter [0:0] IS_D_INVERTED = 1'b0;
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parameter [0:0] IS_PRE_INVERTED = 1'b0;
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wire DD, QQ, $nextQ, $abc9_currQ;
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generate if (INIT == 1'b1)
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assign DD = ~D, Q = ~QQ;
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else
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assign DD = D, Q = QQ;
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endgenerate
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FDPE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_PRE_INVERTED(IS_PRE_INVERTED),
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) _TECHMAP_REPLACE_ (
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.D(DD), .Q($nextQ), .C(C), .CE(CE), .PRE(PRE)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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wire QQ, $nextQ, $abc9_currQ;
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generate if (INIT == 1'b1) begin
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assign Q = ~QQ;
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FDCE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_CLR_INVERTED(IS_PRE_INVERTED),
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) _TECHMAP_REPLACE_ (
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.D(~D), .Q($nextQ), .C(C), .CE(CE), .CLR(PRE)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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end
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else begin
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assign Q = QQ;
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FDPE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_PRE_INVERTED(IS_PRE_INVERTED),
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) _TECHMAP_REPLACE_ (
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.D(D), .Q($nextQ), .C(C), .CE(CE), .PRE(PRE)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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end endgenerate
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\$__ABC9_FF_ abc_dff (.D($nextQ), .Q($abc9_currQ));
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\$__ABC9_ASYNC abc_async (.A($abc9_currQ), .S(PRE ^ IS_PRE_INVERTED), .Y(QQ));
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@ -220,22 +277,33 @@ module FDPE (output Q, input C, CE, D, PRE);
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endmodule
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module FDPE_1 (output Q, input C, CE, D, PRE);
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parameter [0:0] INIT = 1'b1;
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wire DD, QQ, $nextQ, $abc9_currQ;
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generate if (INIT == 1'b1)
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assign DD = ~D, Q = ~QQ;
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else
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assign DD = D, Q = QQ;
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endgenerate
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FDPE_1 #(
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.INIT(1'b0),
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) _TECHMAP_REPLACE_ (
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.D(DD), .Q($nextQ), .C(C), .CE(CE), .PRE(PRE)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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wire QQ, $nextQ, $abc9_currQ;
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generate if (INIT == 1'b1) begin
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assign Q = ~QQ;
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FDCE_1 #(
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.INIT(1'b0)
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) _TECHMAP_REPLACE_ (
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.D(~D), .Q($nextQ), .C(C), .CE(CE), .CLR(PRE)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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end
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else begin
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assign Q = QQ;
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FDPE_1 #(
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.INIT(1'b0)
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) _TECHMAP_REPLACE_ (
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.D(D), .Q($nextQ), .C(C), .CE(CE), .PRE(PRE)
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// ^^^ Note that async
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// control is not directly
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// supported by abc9 but its
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// behaviour is captured by
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// $__ABC9_ASYNC below
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);
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end endgenerate
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\$__ABC9_FF_ abc_dff (.D($nextQ), .Q($abc9_currQ));
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\$__ABC9_ASYNC abc_async (.A($abc9_currQ), .S(PRE), .Y(QQ));
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@ -251,20 +319,29 @@ module FDSE (output Q, input C, CE, D, S);
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parameter [0:0] IS_C_INVERTED = 1'b0;
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parameter [0:0] IS_D_INVERTED = 1'b0;
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parameter [0:0] IS_S_INVERTED = 1'b0;
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wire DD, QQ, $nextQ;
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generate if (INIT == 1'b1)
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assign DD = ~D, Q = ~QQ;
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else
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assign DD = D, Q = QQ;
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endgenerate
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FDSE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_S_INVERTED(IS_S_INVERTED)
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) _TECHMAP_REPLACE_ (
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.D(DD), .Q($nextQ), .C(C), .CE(CE), .S(S)
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);
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wire QQ, $nextQ;
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generate if (INIT == 1'b1) begin
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assign Q = ~QQ;
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FDRE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_R_INVERTED(IS_S_INVERTED)
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) _TECHMAP_REPLACE_ (
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.D(~D), .Q($nextQ), .C(C), .CE(CE), .R(S)
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);
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end
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else begin
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assign Q = QQ;
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FDSE #(
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.INIT(1'b0),
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.IS_C_INVERTED(IS_C_INVERTED),
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.IS_D_INVERTED(IS_D_INVERTED),
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.IS_S_INVERTED(IS_S_INVERTED)
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) _TECHMAP_REPLACE_ (
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.D(D), .Q($nextQ), .C(C), .CE(CE), .S(S)
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);
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end endgenerate
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\$__ABC9_FF_ abc_dff (.D($nextQ), .Q(QQ));
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// Special signals
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@ -275,17 +352,23 @@ module FDSE (output Q, input C, CE, D, S);
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endmodule
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module FDSE_1 (output Q, input C, CE, D, S);
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parameter [0:0] INIT = 1'b1;
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wire DD, QQ, $nextQ;
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generate if (INIT == 1'b1)
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assign DD = ~D, Q = ~QQ;
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else
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assign DD = D, Q = QQ;
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endgenerate
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FDSE_1 #(
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.INIT(1'b0),
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) _TECHMAP_REPLACE_ (
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.D(DD), .Q($nextQ), .C(C), .CE(CE), .S(S)
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);
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wire QQ, $nextQ;
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generate if (INIT == 1'b1) begin
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assign Q = ~QQ;
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FDRE_1 #(
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.INIT(1'b0)
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) _TECHMAP_REPLACE_ (
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.D(~D), .Q($nextQ), .C(C), .CE(CE), .R(S)
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);
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end
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else begin
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assign Q = QQ;
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FDSE_1 #(
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.INIT(1'b0)
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) _TECHMAP_REPLACE_ (
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.D(D), .Q($nextQ), .C(C), .CE(CE), .S(S)
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);
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end endgenerate
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\$__ABC9_FF_ abc_dff (.D($nextQ), .Q(QQ));
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// Special signals
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