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critical path optimizations

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This commit is contained in:
Blaise Tine
2021-09-15 04:50:45 -07:00
parent 73d102afed
commit feca2db24e
4 changed files with 49 additions and 50 deletions
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12
hw/rtl/cache/VX_nc_bypass.v vendored
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@@ -107,6 +107,7 @@ module VX_nc_bypass #(
wire [NUM_REQS-1:0] core_req_valid_in_nc;
wire [NUM_REQS-1:0] core_req_nc_tids;
wire [`UP(CORE_REQ_TIDW)-1:0] core_req_nc_tid;
wire [NUM_REQS-1:0] core_req_nc_sel;
wire core_req_nc_valid;
for (genvar i = 0; i < NUM_REQS; ++i) begin
@@ -115,12 +116,13 @@ module VX_nc_bypass #(
assign core_req_valid_in_nc = core_req_valid_in & core_req_nc_tids;
VX_lzc #(
VX_priority_encoder #(
.N (NUM_REQS)
) core_req_sel (
.in_i (core_req_valid_in_nc),
.cnt_o (core_req_nc_tid),
.valid_o (core_req_nc_valid)
.data_in (core_req_valid_in_nc),
.index (core_req_nc_tid),
.onehot (core_req_nc_sel),
.valid_out (core_req_nc_valid)
);
assign core_req_valid_out = core_req_valid_in & ~core_req_nc_tids;
@@ -143,7 +145,7 @@ module VX_nc_bypass #(
if (NUM_REQS > 1) begin
for (genvar i = 0; i < NUM_REQS; ++i) begin
assign core_req_ready_in[i] = core_req_valid_in_nc[i] ?
(~mem_req_valid_in && mem_req_ready_out && (core_req_nc_tid == i)) : core_req_ready_out[i];
(~mem_req_valid_in && mem_req_ready_out && core_req_nc_sel[i]) : core_req_ready_out[i];
end
end else begin
assign core_req_ready_in = core_req_valid_in_nc ? (~mem_req_valid_in && mem_req_ready_out) : core_req_ready_out;