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interface and instance array support

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- support for interface instance arrays
- support for interface-using module instance arrays
- support for modport array bindings
- fix modport bindings shadowed in nested instances
This commit is contained in:
Zachary Snow
2020-12-06 15:41:33 -07:00
parent 8eac9b0149
commit 2b377cef04
10 changed files with 731 additions and 38 deletions
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test/basic/interface_array_slice.sv
+49
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interface Interface;
logic x;
endinterface
module Module(intfs);
parameter LEFT = 0;
parameter RIGHT = 0;
Interface intfs[LEFT:RIGHT];
logic [LEFT:RIGHT] xs;
localparam LO = LEFT > RIGHT ? RIGHT : LEFT;
localparam HI = LEFT > RIGHT ? LEFT : RIGHT;
for (genvar i = LO; i <= HI; i = i + 1) begin
// intentional shadowing of dimension constants
localparam LEFT = 0;
localparam RIGHT = 0;
assign xs[i] = intfs[i].x;
end
endmodule
module Instance();
parameter LEFT = 0;
parameter RIGHT = 0;
parameter INNER_LEFT = 0;
parameter INNER_RIGHT = 0;
parameter INNER_OFFSET = 0;
reg [LEFT:RIGHT] xs;
localparam DIR = LEFT >= RIGHT ? -1 : 1;
Interface intfs[LEFT:RIGHT]();
generate
genvar i;
for (i = LEFT; i <= RIGHT; i = i + DIR)
assign intfs[i].x = xs[i];
endgenerate
// intentional name collision with localparams in the module
localparam LO = INNER_LEFT >= INNER_RIGHT ? INNER_RIGHT : INNER_LEFT;
localparam HI = INNER_LEFT >= INNER_RIGHT ? INNER_LEFT : INNER_RIGHT;
localparam LEN = HI - LO + 1;
Module #(INNER_LEFT + INNER_OFFSET, INNER_RIGHT + INNER_OFFSET)
l(intfs[INNER_LEFT:INNER_RIGHT]);
Module #(INNER_LEFT + INNER_OFFSET, INNER_RIGHT + INNER_OFFSET)
m(intfs[LO+:LEN]);
Module #(INNER_LEFT + INNER_OFFSET, INNER_RIGHT + INNER_OFFSET)
n(intfs[HI-:LEN]);
endmodule