$mem_v2#
No help message for this cell type found.
Simulation model (Verilog)#
module \$mem_v2 (RD_CLK, RD_EN, RD_ARST, RD_SRST, RD_ADDR, RD_DATA, WR_CLK, WR_EN, WR_ADDR, WR_DATA);
parameter MEMID = "";
parameter signed SIZE = 4;
parameter signed OFFSET = 0;
parameter signed ABITS = 2;
parameter signed WIDTH = 8;
parameter signed INIT = 1'bx;
parameter signed RD_PORTS = 1;
parameter RD_CLK_ENABLE = 1'b1;
parameter RD_CLK_POLARITY = 1'b1;
parameter RD_TRANSPARENCY_MASK = 1'b0;
parameter RD_COLLISION_X_MASK = 1'b0;
parameter RD_WIDE_CONTINUATION = 1'b0;
parameter RD_CE_OVER_SRST = 1'b0;
parameter RD_ARST_VALUE = 1'b0;
parameter RD_SRST_VALUE = 1'b0;
parameter RD_INIT_VALUE = 1'b0;
parameter signed WR_PORTS = 1;
parameter WR_CLK_ENABLE = 1'b1;
parameter WR_CLK_POLARITY = 1'b1;
parameter WR_PRIORITY_MASK = 1'b0;
parameter WR_WIDE_CONTINUATION = 1'b0;
input [RD_PORTS-1:0] RD_CLK;
input [RD_PORTS-1:0] RD_EN;
input [RD_PORTS-1:0] RD_ARST;
input [RD_PORTS-1:0] RD_SRST;
input [RD_PORTS*ABITS-1:0] RD_ADDR;
output reg [RD_PORTS*WIDTH-1:0] RD_DATA;
input [WR_PORTS-1:0] WR_CLK;
input [WR_PORTS*WIDTH-1:0] WR_EN;
input [WR_PORTS*ABITS-1:0] WR_ADDR;
input [WR_PORTS*WIDTH-1:0] WR_DATA;
reg [WIDTH-1:0] memory [SIZE-1:0];
integer i, j, k;
reg [WR_PORTS-1:0] LAST_WR_CLK;
reg [RD_PORTS-1:0] LAST_RD_CLK;
function port_active;
input clk_enable;
input clk_polarity;
input last_clk;
input this_clk;
begin
casez ({clk_enable, clk_polarity, last_clk, this_clk})
4'b0???: port_active = 1;
4'b1101: port_active = 1;
4'b1010: port_active = 1;
default: port_active = 0;
endcase
end
endfunction
initial begin
for (i = 0; i < SIZE; i = i+1)
memory[i] = INIT >>> (i*WIDTH);
RD_DATA = RD_INIT_VALUE;
end
always @(RD_CLK, RD_ARST, RD_ADDR, RD_DATA, WR_CLK, WR_EN, WR_ADDR, WR_DATA) begin
`ifdef SIMLIB_MEMDELAY
#`SIMLIB_MEMDELAY;
`endif
for (i = 0; i < RD_PORTS; i = i+1) begin
if (RD_CLK_ENABLE[i] && RD_EN[i] && port_active(RD_CLK_ENABLE[i], RD_CLK_POLARITY[i], LAST_RD_CLK[i], RD_CLK[i])) begin
// $display("Read from %s: addr=%b data=%b", MEMID, RD_ADDR[i*ABITS +: ABITS], memory[RD_ADDR[i*ABITS +: ABITS] - OFFSET]);
RD_DATA[i*WIDTH +: WIDTH] <= memory[RD_ADDR[i*ABITS +: ABITS] - OFFSET];
for (j = 0; j < WR_PORTS; j = j+1) begin
if (RD_TRANSPARENCY_MASK[i*WR_PORTS + j] && port_active(WR_CLK_ENABLE[j], WR_CLK_POLARITY[j], LAST_WR_CLK[j], WR_CLK[j]) && RD_ADDR[i*ABITS +: ABITS] == WR_ADDR[j*ABITS +: ABITS])
for (k = 0; k < WIDTH; k = k+1)
if (WR_EN[j*WIDTH+k])
RD_DATA[i*WIDTH+k] <= WR_DATA[j*WIDTH+k];
if (RD_COLLISION_X_MASK[i*WR_PORTS + j] && port_active(WR_CLK_ENABLE[j], WR_CLK_POLARITY[j], LAST_WR_CLK[j], WR_CLK[j]) && RD_ADDR[i*ABITS +: ABITS] == WR_ADDR[j*ABITS +: ABITS])
for (k = 0; k < WIDTH; k = k+1)
if (WR_EN[j*WIDTH+k])
RD_DATA[i*WIDTH+k] <= 1'bx;
end
end
end
for (i = 0; i < WR_PORTS; i = i+1) begin
if (port_active(WR_CLK_ENABLE[i], WR_CLK_POLARITY[i], LAST_WR_CLK[i], WR_CLK[i]))
for (j = 0; j < WIDTH; j = j+1)
if (WR_EN[i*WIDTH+j]) begin
// $display("Write to %s: addr=%b data=%b", MEMID, WR_ADDR[i*ABITS +: ABITS], WR_DATA[i*WIDTH+j]);
memory[WR_ADDR[i*ABITS +: ABITS] - OFFSET][j] = WR_DATA[i*WIDTH+j];
end
end
for (i = 0; i < RD_PORTS; i = i+1) begin
if (!RD_CLK_ENABLE[i]) begin
// $display("Combinatorial read from %s: addr=%b data=%b", MEMID, RD_ADDR[i*ABITS +: ABITS], memory[RD_ADDR[i*ABITS +: ABITS] - OFFSET]);
RD_DATA[i*WIDTH +: WIDTH] <= memory[RD_ADDR[i*ABITS +: ABITS] - OFFSET];
end
end
for (i = 0; i < RD_PORTS; i = i+1) begin
if (RD_SRST[i] && port_active(RD_CLK_ENABLE[i], RD_CLK_POLARITY[i], LAST_RD_CLK[i], RD_CLK[i]) && (RD_EN[i] || !RD_CE_OVER_SRST[i]))
RD_DATA[i*WIDTH +: WIDTH] <= RD_SRST_VALUE[i*WIDTH +: WIDTH];
if (RD_ARST[i])
RD_DATA[i*WIDTH +: WIDTH] <= RD_ARST_VALUE[i*WIDTH +: WIDTH];
end
LAST_RD_CLK <= RD_CLK;
LAST_WR_CLK <= WR_CLK;
end
endmodule
Note
This page was auto-generated from the output of
help $mem_v2
.