diff options
Diffstat (limited to 'tests/arch/common')
| -rw-r--r-- | tests/arch/common/blockram.v | 42 | ||||
| -rw-r--r-- | tests/arch/common/blockrom.v | 31 |
2 files changed, 53 insertions, 20 deletions
diff --git a/tests/arch/common/blockram.v b/tests/arch/common/blockram.v index dbc6ca65c..5ed0736d0 100644 --- a/tests/arch/common/blockram.v +++ b/tests/arch/common/blockram.v @@ -5,19 +5,20 @@ module sync_ram_sp #(parameter DATA_WIDTH=8, ADDRESS_WIDTH=10) input wire [ADDRESS_WIDTH-1:0] address_in, output wire [DATA_WIDTH-1:0] data_out); - localparam WORD = (DATA_WIDTH-1); - localparam DEPTH = (2**ADDRESS_WIDTH-1); + localparam WORD = (DATA_WIDTH-1); + localparam DEPTH = (2**ADDRESS_WIDTH-1); - reg [WORD:0] data_out_r; - reg [WORD:0] memory [0:DEPTH]; + reg [WORD:0] data_out_r; + reg [WORD:0] memory [0:DEPTH]; - always @(posedge clk) begin - if (write_enable) - memory[address_in] <= data_in; - data_out_r <= memory[address_in]; - end + always @(posedge clk) begin + if (write_enable) + memory[address_in] <= data_in; + data_out_r <= memory[address_in]; + end + + assign data_out = data_out_r; - assign data_out = data_out_r; endmodule // sync_ram_sp @@ -28,18 +29,19 @@ module sync_ram_sdp #(parameter DATA_WIDTH=8, ADDRESS_WIDTH=10) input wire [ADDRESS_WIDTH-1:0] address_in_r, address_in_w, output wire [DATA_WIDTH-1:0] data_out); - localparam WORD = (DATA_WIDTH-1); - localparam DEPTH = (2**ADDRESS_WIDTH-1); + localparam WORD = (DATA_WIDTH-1); + localparam DEPTH = (2**ADDRESS_WIDTH-1); + + reg [WORD:0] data_out_r; + reg [WORD:0] memory [0:DEPTH]; - reg [WORD:0] data_out_r; - reg [WORD:0] memory [0:DEPTH]; + always @(posedge clk) begin + if (write_enable) + memory[address_in_w] <= data_in; + data_out_r <= memory[address_in_r]; + end - always @(posedge clk) begin - if (write_enable) - memory[address_in_w] <= data_in; - data_out_r <= memory[address_in_r]; - end + assign data_out = data_out_r; - assign data_out = data_out_r; endmodule // sync_ram_sdp diff --git a/tests/arch/common/blockrom.v b/tests/arch/common/blockrom.v new file mode 100644 index 000000000..93f5c9ddf --- /dev/null +++ b/tests/arch/common/blockrom.v @@ -0,0 +1,31 @@ +`default_nettype none +module sync_rom #(parameter DATA_WIDTH=8, ADDRESS_WIDTH=10) + (input wire clk, + input wire [ADDRESS_WIDTH-1:0] address_in, + output wire [DATA_WIDTH-1:0] data_out); + + localparam WORD = (DATA_WIDTH-1); + localparam DEPTH = (2**ADDRESS_WIDTH-1); + + reg [WORD:0] data_out_r; + reg [WORD:0] memory [0:DEPTH]; + + integer i,j = 64'hF4B1CA8127865242; + initial + for (i = 0; i <= DEPTH; i++) begin + // In case this ROM will be implemented in fabric: fill the memory with some data + // uncorrelated with the address, or Yosys might see through the ruse and e.g. not + // emit any LUTs at all for `memory[i] = i;`, just a latch. + memory[i] = j * 64'h2545F4914F6CDD1D; + j = j ^ (j >> 12); + j = j ^ (j << 25); + j = j ^ (j >> 27); + end + + always @(posedge clk) begin + data_out_r <= memory[address_in]; + end + + assign data_out = data_out_r; + +endmodule // sync_rom |