diff options
Diffstat (limited to 'techlibs/xilinx/cells_sim.v')
| -rw-r--r-- | techlibs/xilinx/cells_sim.v | 224 |
1 files changed, 16 insertions, 208 deletions
diff --git a/techlibs/xilinx/cells_sim.v b/techlibs/xilinx/cells_sim.v index 309ee500a..35d9aac96 100644 --- a/techlibs/xilinx/cells_sim.v +++ b/techlibs/xilinx/cells_sim.v @@ -258,33 +258,10 @@ module FDRE ( parameter [0:0] IS_D_INVERTED = 1'b0; parameter [0:0] IS_R_INVERTED = 1'b0; initial Q <= INIT; - wire \$currQ ; - reg \$nextQ ; - always @* if (R == !IS_R_INVERTED) \$nextQ = 1'b0; else if (CE) \$nextQ = D ^ IS_D_INVERTED; else \$nextQ = \$currQ ; -`ifdef _ABC9 - // `abc9' requires that complex flops be split into a combinatorial - // box (this module) feeding a simple flop ($_ABC9_FF_ in abc9_map.v) - // In order to achieve clock-enable behaviour, the current value - // of the sequential output is required which Yosys will - // connect to the special `$currQ' wire. - - // Special signal indicating clock domain - // (used to partition the module so that `abc9' only performs - // sequential synthesis (reachability analysis) correctly on - // one domain at a time) - wire [1:0] $abc9_clock = {C, IS_C_INVERTED}; - // Special signal indicating control domain - // (which, combined with this spell type, encodes to `abc9' - // which flops may be merged together) - wire [3:0] $abc9_control = {CE, IS_D_INVERTED, R, IS_R_INVERTED}; - always @* Q = \$nextQ ; -`else - assign \$currQ = Q; generate case (|IS_C_INVERTED) - 1'b0: always @(posedge C) Q <= \$nextQ ; - 1'b1: always @(negedge C) Q <= \$nextQ ; + 1'b0: always @(posedge C) if (R == !IS_R_INVERTED) Q <= 1'b0; else if (CE) Q <= D ^ IS_D_INVERTED; + 1'b1: always @(negedge C) if (R == !IS_R_INVERTED) Q <= 1'b0; else if (CE) Q <= D ^ IS_D_INVERTED; endcase endgenerate -`endif endmodule (* abc9_box_id=1002, lib_whitebox, abc9_flop *) @@ -297,30 +274,7 @@ module FDRE_1 ( ); parameter [0:0] INIT = 1'b0; initial Q <= INIT; - wire \$currQ ; - reg \$nextQ ; - always @* if (R) Q <= 1'b0; else if (CE) Q <= D; else \$nextQ = \$currQ ; -`ifdef _ABC9 - // `abc9' requires that complex flops be split into a combinatorial - // box (this module) feeding a simple flop ($_ABC9_FF_ in abc9_map.v) - // In order to achieve clock-enable behaviour, the current value - // of the sequential output is required which Yosys will - // connect to the special `$currQ' wire. - - // Special signal indicating clock domain - // (used to partition the module so that `abc9' only performs - // sequential synthesis (reachability analysis) correctly on - // one domain at a time) - wire [1:0] $abc9_clock = {C, 1'b1 /* IS_C_INVERTED */}; - // Special signal indicating control domain - // (which, combined with this spell type, encodes to `abc9' - // which flops may be merged together) - wire [3:0] $abc9_control = {CE, 1'b0 /* IS_D_INVERTED */, R, 1'b0 /* IS_R_INVERTED */}; - always @* Q = \$nextQ ; -`else - assign \$currQ = Q; - always @(negedge C) Q <= \$nextQ ; -`endif + always @(negedge C) if (R) Q <= 1'b0; else if (CE) Q <= D; endmodule (* abc9_box_id=1003, lib_whitebox, abc9_flop *) @@ -341,37 +295,12 @@ module FDCE ( parameter [0:0] IS_D_INVERTED = 1'b0; parameter [0:0] IS_CLR_INVERTED = 1'b0; initial Q <= INIT; - wire \$currQ ; - reg \$nextQ ; - always @* if (CE) Q <= D ^ IS_D_INVERTED; else \$nextQ = \$currQ ; -`ifdef _ABC9 - // `abc9' requires that complex flops be split into a combinatorial - // box (this module) feeding a simple flop ($_ABC9_FF_ in abc9_map.v) - // In order to achieve clock-enable behaviour, the current value - // of the sequential output is required which Yosys will - // connect to the special `$currQ' wire. - // Since this is an async flop, async behaviour is also dealt with - // using the $_ABC9_ASYNC box by abc9_map.v - - // Special signal indicating clock domain - // (used to partition the module so that `abc9' only performs - // sequential synthesis (reachability analysis) correctly on - // one domain at a time) - wire [1:0] $abc9_clock = {C, IS_C_INVERTED}; - // Special signal indicating control domain - // (which, combined with this spell type, encodes to `abc9' - // which flops may be merged together) - wire [3:0] $abc9_control = {CE, IS_D_INVERTED, CLR, IS_CLR_INVERTED}; - always @* Q = \$nextQ ; -`else - assign \$currQ = Q; generate case ({|IS_C_INVERTED, |IS_CLR_INVERTED}) - 2'b00: always @(posedge C, posedge CLR) if ( CLR) Q <= 1'b0; else Q <= \$nextQ ; - 2'b01: always @(posedge C, negedge CLR) if (!CLR) Q <= 1'b0; else Q <= \$nextQ ; - 2'b10: always @(negedge C, posedge CLR) if ( CLR) Q <= 1'b0; else Q <= \$nextQ ; - 2'b11: always @(negedge C, negedge CLR) if (!CLR) Q <= 1'b0; else Q <= \$nextQ ; + 2'b00: always @(posedge C, posedge CLR) if ( CLR) Q <= 1'b0; else if (CE) Q <= D ^ IS_D_INVERTED; + 2'b01: always @(posedge C, negedge CLR) if (!CLR) Q <= 1'b0; else if (CE) Q <= D ^ IS_D_INVERTED; + 2'b10: always @(negedge C, posedge CLR) if ( CLR) Q <= 1'b0; else if (CE) Q <= D ^ IS_D_INVERTED; + 2'b11: always @(negedge C, negedge CLR) if (!CLR) Q <= 1'b0; else if (CE) Q <= D ^ IS_D_INVERTED; endcase endgenerate -`endif endmodule (* abc9_box_id=1004, lib_whitebox, abc9_flop *) @@ -384,32 +313,7 @@ module FDCE_1 ( ); parameter [0:0] INIT = 1'b0; initial Q <= INIT; - wire \$currQ ; - reg \$nextQ ; - always @* if (CE) Q <= D; else \$nextQ = \$currQ ; -`ifdef _ABC9 - // `abc9' requires that complex flops be split into a combinatorial - // box (this module) feeding a simple flop ($_ABC9_FF_ in abc9_map.v) - // In order to achieve clock-enable behaviour, the current value - // of the sequential output is required which Yosys will - // connect to the special `$currQ' wire. - // Since this is an async flop, async behaviour is also dealt with - // using the $_ABC9_ASYNC box by abc9_map.v - - // Special signal indicating clock domain - // (used to partition the module so that `abc9' only performs - // sequential synthesis (reachability analysis) correctly on - // one domain at a time) - wire [1:0] $abc9_clock = {C, 1'b1 /* IS_C_INVERTED */}; - // Special signal indicating control domain - // (which, combined with this spell type, encodes to `abc9' - // which flops may be merged together) - wire [3:0] $abc9_control = {CE, 1'b0 /* IS_D_INVERTED */, CLR, 1'b0 /* IS_CLR_INVERTED */}; - always @* Q = \$nextQ ; -`else - assign \$currQ = Q; - always @(negedge C, posedge CLR) if (CLR) Q <= 1'b0; else Q <= \$nextQ ; -`endif + always @(negedge C, posedge CLR) if (CLR) Q <= 1'b0; else if (CE) Q <= D; endmodule (* abc9_box_id=1005, lib_whitebox, abc9_flop *) @@ -430,37 +334,12 @@ module FDPE ( parameter [0:0] IS_D_INVERTED = 1'b0; parameter [0:0] IS_PRE_INVERTED = 1'b0; initial Q <= INIT; - wire \$currQ ; - reg \$nextQ ; - always @* if (CE) Q <= D ^ IS_D_INVERTED; else \$nextQ = \$currQ ; -`ifdef _ABC9 - // `abc9' requires that complex flops be split into a combinatorial - // box (this module) feeding a simple flop ($_ABC9_FF_ in abc9_map.v) - // In order to achieve clock-enable behaviour, the current value - // of the sequential output is required which Yosys will - // connect to the special `$currQ' wire. - // Since this is an async flop, async behaviour is also dealt with - // using the $_ABC9_ASYNC box by abc9_map.v - - // Special signal indicating clock domain - // (used to partition the module so that `abc9' only performs - // sequential synthesis (reachability analysis) correctly on - // one domain at a time) - wire [1:0] $abc9_clock = {C, IS_C_INVERTED}; - // Special signal indicating control domain - // (which, combined with this spell type, encodes to `abc9' - // which flops may be merged together) - wire [3:0] $abc9_control = {CE, IS_D_INVERTED, PRE, IS_PRE_INVERTED}; - always @* Q = \$nextQ ; -`else - assign \$currQ = Q; generate case ({|IS_C_INVERTED, |IS_PRE_INVERTED}) - 2'b00: always @(posedge C, posedge PRE) if ( PRE) Q <= 1'b1; else Q <= \$nextQ ; - 2'b01: always @(posedge C, negedge PRE) if (!PRE) Q <= 1'b1; else Q <= \$nextQ ; - 2'b10: always @(negedge C, posedge PRE) if ( PRE) Q <= 1'b1; else Q <= \$nextQ ; - 2'b11: always @(negedge C, negedge PRE) if (!PRE) Q <= 1'b1; else Q <= \$nextQ ; + 2'b00: always @(posedge C, posedge PRE) if ( PRE) Q <= 1'b1; else Q <= Q ; + 2'b01: always @(posedge C, negedge PRE) if (!PRE) Q <= 1'b1; else Q <= Q ; + 2'b10: always @(negedge C, posedge PRE) if ( PRE) Q <= 1'b1; else Q <= Q ; + 2'b11: always @(negedge C, negedge PRE) if (!PRE) Q <= 1'b1; else Q <= Q ; endcase endgenerate -`endif endmodule (* abc9_box_id=1006, lib_whitebox, abc9_flop *) @@ -473,32 +352,7 @@ module FDPE_1 ( ); parameter [0:0] INIT = 1'b1; initial Q <= INIT; - wire \$currQ ; - reg \$nextQ ; - always @* if (CE) Q <= D; else \$nextQ = \$currQ ; -`ifdef _ABC9 - // `abc9' requires that complex flops be split into a combinatorial - // box (this module) feeding a simple flop ($_ABC9_FF_ in abc9_map.v) - // In order to achieve clock-enable behaviour, the current value - // of the sequential output is required which Yosys will - // connect to the special `$currQ' wire. - // Since this is an async flop, async behaviour is also dealt with - // using the $_ABC9_ASYNC box by abc9_map.v - - // Special signal indicating clock domain - // (used to partition the module so that `abc9' only performs - // sequential synthesis (reachability analysis) correctly on - // one domain at a time) - wire [1:0] $abc9_clock = {C, 1'b1 /* IS_C_INVERTED */}; - // Special signal indicating control domain - // (which, combined with this spell type, encodes to `abc9' - // which flops may be merged together) - wire [3:0] $abc9_control = {CE, 1'b0 /* IS_D_INVERTED */, PRE, 1'b0 /* IS_PRE_INVERTED */}; - always @* Q = \$nextQ ; -`else - assign \$currQ = Q; - always @(negedge C, posedge PRE) if (PRE) Q <= 1'b1; else Q <= \$nextQ ; -`endif + always @(negedge C, posedge PRE) if (PRE) Q <= 1'b1; else if (CE) Q <= D; endmodule (* abc9_box_id=1007, lib_whitebox, abc9_flop *) @@ -519,33 +373,10 @@ module FDSE ( parameter [0:0] IS_D_INVERTED = 1'b0; parameter [0:0] IS_S_INVERTED = 1'b0; initial Q <= INIT; - wire \$currQ ; - reg \$nextQ ; - always @* if (S == !IS_S_INVERTED) \$nextQ = 1'b1; else if (CE) \$nextQ = D ^ IS_D_INVERTED; else \$nextQ = \$currQ ; -`ifdef _ABC9 - // `abc9' requires that complex flops be split into a combinatorial - // box (this module) feeding a simple flop ($_ABC9_FF_ in abc9_map.v) - // In order to achieve clock-enable behaviour, the current value - // of the sequential output is required which Yosys will - // connect to the special `$currQ' wire. - - // Special signal indicating clock domain - // (used to partition the module so that `abc9' only performs - // sequential synthesis (reachability analysis) correctly on - // one domain at a time) - wire [1:0] $abc9_clock = {C, IS_C_INVERTED}; - // Special signal indicating control domain - // (which, combined with this spell type, encodes to `abc9' - // which flops may be merged together) - wire [3:0] $abc9_control = {CE, IS_D_INVERTED, S, IS_S_INVERTED}; - always @* Q = \$nextQ ; -`else - assign \$currQ = Q; generate case (|IS_C_INVERTED) - 1'b0: always @(posedge C) Q <= \$nextQ ; - 1'b1: always @(negedge C) Q <= \$nextQ ; + 1'b0: always @(posedge C) if (S == !IS_S_INVERTED) Q <= 1'b1; else if (CE) Q <= D ^ IS_D_INVERTED; + 1'b1: always @(negedge C) if (S == !IS_S_INVERTED) Q <= 1'b1; else if (CE) Q <= D ^ IS_D_INVERTED; endcase endgenerate -`endif endmodule (* abc9_box_id=1008, lib_whitebox, abc9_flop *) @@ -558,30 +389,7 @@ module FDSE_1 ( ); parameter [0:0] INIT = 1'b1; initial Q <= INIT; - wire \$currQ ; - reg \$nextQ ; - always @* if (S) \$nextQ = 1'b1; else if (CE) \$nextQ = D; else \$nextQ = \$currQ ; -`ifdef _ABC9 - // `abc9' requires that complex flops be split into a combinatorial - // box (this module) feeding a simple flop ($_ABC9_FF_ in abc9_map.v) - // In order to achieve clock-enable behaviour, the current value - // of the sequential output is required which Yosys will - // connect to the special `$currQ' wire. - - // Special signal indicating clock domain - // (used to partition the module so that `abc9' only performs - // sequential synthesis (reachability analysis) correctly on - // one domain at a time) - wire [1:0] $abc9_clock = {C, 1'b1 /* IS_C_INVERTED */}; - // Special signal indicating control domain - // (which, combined with this spell type, encodes to `abc9' - // which flops may be merged together) - wire [3:0] $abc9_control = {CE, 1'b0 /* IS_D_INVERTED */, S, 1'b0 /* IS_S_INVERTED */}; - always @* Q = \$nextQ ; -`else - assign \$currQ = Q; - always @(negedge C) Q <= \$nextQ ; -`endif + always @(negedge C) if (S) Q <= 1'b1; else if (CE) Q <= D; endmodule module LDCE ( |