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module priority_memory (
clk, wren_a, rden_a, addr_a, wdata_a, rdata_a,
wren_b, rden_b, addr_b, wdata_b, rdata_b
);
parameter ABITS = 12;
parameter WIDTH = 72;
input clk;
input wren_a, rden_a, wren_b, rden_b;
input [ABITS-1:0] addr_a, addr_b;
input [WIDTH-1:0] wdata_a, wdata_b;
output reg [WIDTH-1:0] rdata_a, rdata_b;
`ifdef USE_HUGE
(* ram_style = "huge" *)
`endif
reg [WIDTH-1:0] mem [0:2**ABITS-1];
integer i;
initial begin
rdata_a <= 'h0;
rdata_b <= 'h0;
end
`ifndef FLIP_PORTS
always @(posedge clk) begin
// A port
if (wren_a)
mem[addr_a] <= wdata_a;
else if (rden_a)
rdata_a <= mem[addr_a];
// B port
if (wren_b)
mem[addr_b] <= wdata_b;
else if (rden_b)
if (wren_a && addr_a == addr_b)
rdata_b <= wdata_a;
else
rdata_b <= mem[addr_b];
end
`else // FLIP PORTS
always @(posedge clk) begin
// A port
if (wren_b)
mem[addr_b] <= wdata_b;
else if (rden_b)
rdata_b <= mem[addr_b];
// B port
if (wren_a)
mem[addr_a] <= wdata_a;
else if (rden_a)
if (wren_b && addr_a == addr_b)
rdata_a <= wdata_b;
else
rdata_a <= mem[addr_a];
end
`endif
endmodule
module sp_write_first (clk, wren_a, rden_a, addr_a, wdata_a, rdata_a);
parameter ABITS = 12;
parameter WIDTH = 72;
input clk;
input wren_a, rden_a;
input [ABITS-1:0] addr_a;
input [WIDTH-1:0] wdata_a;
output reg [WIDTH-1:0] rdata_a;
(* ram_style = "huge" *)
reg [WIDTH-1:0] mem [0:2**ABITS-1];
integer i;
initial begin
rdata_a <= 'h0;
end
always @(posedge clk) begin
// A port
if (wren_a)
mem[addr_a] <= wdata_a;
if (rden_a)
if (wren_a)
rdata_a <= wdata_a;
else
rdata_a <= mem[addr_a];
end
endmodule
module sp_read_first (clk, wren_a, rden_a, addr_a, wdata_a, rdata_a);
parameter ABITS = 12;
parameter WIDTH = 72;
input clk;
input wren_a, rden_a;
input [ABITS-1:0] addr_a;
input [WIDTH-1:0] wdata_a;
output reg [WIDTH-1:0] rdata_a;
(* ram_style = "huge" *)
reg [WIDTH-1:0] mem [0:2**ABITS-1];
integer i;
initial begin
rdata_a <= 'h0;
end
always @(posedge clk) begin
// A port
if (wren_a)
mem[addr_a] <= wdata_a;
if (rden_a)
rdata_a <= mem[addr_a];
end
endmodule
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