microwatt/asic/behavioural/Microwatt_FP_DFFRFile.v

module Microwatt_FP_DFFRFile (
`ifdef USE_POWER_PINS
    inout VPWR,
    inout VGND,
`endif
    input [6:0]   R1, R2, R3, RW,
    input [63:0]  DW,
    output [63:0] D1, D2, D3,
    input CLK,
    input WE
);

    reg [63:0] registers[0:79];

    assign D1 = registers[R1];
    assign D2 = registers[R2];
    assign D3 = registers[R3];

    always @(posedge CLK) begin
        if (WE)
            registers[RW] <= DW;
    end

endmodule