riscv
/
yosys
mirror of https://github.com/YosysHQ/yosys.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Generate TRELLIS_DPR16X4 for lutram

This commit is contained in:
Miodrag Milanovic 2023-03-31 15:46:35 +02:00 committed by myrtle
parent 6e12da3956
commit 6e4c1675e7
3 changed files with 72 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
techlibs/machxo2/cells_sim.v
View File

@ -200,6 +200,50 @@ module DCMA (
); );
endmodule endmodule
(* abc9_box, lib_whitebox *)
module TRELLIS_DPR16X4 (
input [3:0] DI,
input [3:0] WAD,
input WRE,
input WCK,
input [3:0] RAD,
output [3:0] DO
);
parameter WCKMUX = "WCK";
parameter WREMUX = "WRE";
parameter [63:0] INITVAL = 64'h0000000000000000;
reg [3:0] mem[15:0];
integer i;
initial begin
for (i = 0; i < 16; i = i + 1)
mem[i] <= INITVAL[4*i +: 4];
end
wire muxwck = (WCKMUX == "INV") ? ~WCK : WCK;
reg muxwre;
always @(*)
case (WREMUX)
"1": muxwre = 1'b1;
"0": muxwre = 1'b0;
"INV": muxwre = ~WRE;
default: muxwre = WRE;
endcase
always @(posedge muxwck)
if (muxwre)
mem[WAD] <= DI;
assign DO = mem[RAD];
specify
// TODO
(RAD *> DO) = 0;
endspecify
endmodule
(* abc9_box, lib_whitebox *) (* abc9_box, lib_whitebox *)
module DPR16X4C ( module DPR16X4C (
input [3:0] DI, input [3:0] DI,

6
techlibs/machxo2/lutrams.txt
View File

@ -1,11 +1,11 @@
ram distributed $__DPR16X4C_ { ram distributed $__TRELLIS_DPR16X4_ {
abits 4; abits 4;
width 4; width 4;
cost 4; cost 4;
init no_undef; init any;
prune_rom; prune_rom;
port sw "W" { port sw "W" {
clock posedge; clock anyedge;
} }
port ar "R" { port ar "R" {
} }

43
techlibs/machxo2/lutrams_map.v
View File

@ -1,23 +1,30 @@
module $__DPR16X4C_ (...); module $__TRELLIS_DPR16X4_(...);
parameter INIT = 64'b0;
input PORT_W_CLK; parameter INIT = 64'bx;
input [3:0] PORT_W_ADDR; parameter PORT_W_CLK_POL = 1;
input [3:0] PORT_W_WR_DATA;
input PORT_W_WR_EN;
input [3:0] PORT_R_ADDR; input PORT_W_CLK;
output [3:0] PORT_R_RD_DATA; input [3:0] PORT_W_ADDR;
input [3:0] PORT_W_WR_DATA;
input PORT_W_WR_EN;
DPR16X4C #( input [3:0] PORT_R_ADDR;
.INITVAL($sformatf("0x%08x", INIT)) output [3:0] PORT_R_RD_DATA;
) _TECHMAP_REPLACE_ (
.RAD(PORT_R_ADDR), localparam WCKMUX = PORT_W_CLK_POL ? "WCK" : "INV";
.DO(PORT_R_RD_DATA),
TRELLIS_DPR16X4 #(
.INITVAL(INIT),
.WCKMUX(WCKMUX),
.WREMUX("WRE")
) _TECHMAP_REPLACE_ (
.RAD(PORT_R_ADDR),
.DO(PORT_R_RD_DATA),
.WAD(PORT_W_ADDR),
.DI(PORT_W_WR_DATA),
.WCK(PORT_W_CLK),
.WRE(PORT_W_WR_EN)
);
.WAD(PORT_W_ADDR),
.DI(PORT_W_WR_DATA),
.WCK(PORT_W_CLK),
.WRE(PORT_W_WR_EN)
);
endmodule endmodule