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fpu implementation (part1)

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This commit is contained in:
Blaise Tine
2020-07-23 03:18:09 -07:00
parent 6836f397f8
commit 75e3c31b56
31 changed files with 662 additions and 159 deletions
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47
hw/rtl/VX_csr_arb.v
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@@ -15,40 +15,41 @@ module VX_csr_arb (
VX_commit_if csr_rsp_if,
// outputs
VX_csr_io_rsp_if csr_io_rsp_if,
VX_commit_if csr_commit_if
VX_commit_if csr_commit_if,
VX_csr_io_rsp_if csr_io_rsp_if,
input wire select_io_req,
input wire select_io_rsp
);
`UNUSED_VAR (clk)
`UNUSED_VAR (reset)
wire core_select = ~(| csr_io_req_if.valid);
// requests
assign csr_req_if.valid = core_select ? csr_core_req_if.valid : {`NUM_THREADS{csr_io_req_if.valid}};
assign csr_req_if.warp_num = core_select ? csr_core_req_if.warp_num : 0;
assign csr_req_if.curr_PC = core_select ? csr_core_req_if.curr_PC : 0;
assign csr_req_if.csr_op = core_select ? csr_core_req_if.csr_op : (csr_io_req_if.rw ? `CSR_RW : `CSR_RS);
assign csr_req_if.csr_addr = core_select ? csr_core_req_if.csr_addr : csr_io_req_if.addr;
assign csr_req_if.csr_mask = core_select ? csr_core_req_if.csr_mask : (csr_io_req_if.rw ? csr_io_req_if.data : 32'b0);
assign csr_req_if.rd = core_select ? csr_core_req_if.rd : 0;
assign csr_req_if.wb = core_select ? csr_core_req_if.wb : 0;
assign csr_req_if.is_io = ~core_select;
assign csr_req_if.valid = (~select_io_req) ? csr_core_req_if.valid : {`NUM_THREADS{csr_io_req_if.valid}};
assign csr_req_if.warp_num = (~select_io_req) ? csr_core_req_if.warp_num : 0;
assign csr_req_if.curr_PC = (~select_io_req) ? csr_core_req_if.curr_PC : 0;
assign csr_req_if.csr_op = (~select_io_req) ? csr_core_req_if.csr_op : (csr_io_req_if.rw ? `CSR_RW : `CSR_RS);
assign csr_req_if.csr_addr = (~select_io_req) ? csr_core_req_if.csr_addr : csr_io_req_if.addr;
assign csr_req_if.csr_mask = (~select_io_req) ? csr_core_req_if.csr_mask : (csr_io_req_if.rw ? csr_io_req_if.data : 32'b0);
assign csr_req_if.rd = (~select_io_req) ? csr_core_req_if.rd : 0;
assign csr_req_if.wb = (~select_io_req) ? csr_core_req_if.wb : 0;
assign csr_req_if.is_io = select_io_req;
assign csr_core_req_if.ready = csr_req_if.ready && core_select;
assign csr_io_req_if.ready = csr_req_if.ready && ~core_select;
assign csr_core_req_if.ready = csr_req_if.ready && (~select_io_req);
assign csr_io_req_if.ready = csr_req_if.ready && select_io_req;
// responses
assign csr_io_rsp_if.valid = csr_rsp_if.valid[0] & csr_rsp_if.is_io;
assign csr_io_rsp_if.valid = csr_rsp_if.valid[0] & select_io_rsp;
assign csr_io_rsp_if.data = csr_rsp_if.data[0];
assign csr_commit_if.valid = csr_rsp_if.valid & {`NUM_THREADS{~csr_rsp_if.is_io}};
assign csr_commit_if.warp_num = csr_rsp_if.warp_num;
assign csr_commit_if.curr_PC = csr_rsp_if.curr_PC;
assign csr_commit_if.data = csr_rsp_if.data;
assign csr_commit_if.rd = csr_rsp_if.rd;
assign csr_commit_if.wb = csr_rsp_if.wb;
assign csr_commit_if.valid = csr_rsp_if.valid & {`NUM_THREADS{~select_io_rsp}};
assign csr_commit_if.warp_num = csr_rsp_if.warp_num;
assign csr_commit_if.curr_PC = csr_rsp_if.curr_PC;
assign csr_commit_if.data = csr_rsp_if.data;
assign csr_commit_if.rd = csr_rsp_if.rd;
assign csr_commit_if.wb = csr_rsp_if.wb;
assign csr_rsp_if.ready = csr_rsp_if.is_io ? csr_io_rsp_if.ready : csr_commit_if.ready;
assign csr_rsp_if.ready = select_io_rsp ? csr_io_rsp_if.ready : csr_commit_if.ready;
endmodule