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fair arbiter speed optimization

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Blaise Tine 2024-08-04 22:13:47 -07:00
parent e663db9b5a
commit 42c62001ec
1 changed files with 5 additions and 6 deletions
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11
hw/rtl/libs/VX_fair_arbiter.sv
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@ -38,17 +38,16 @@ module VX_fair_arbiter #(
end else begin
reg [NUM_REQS-1:0] grant_mask;
reg [NUM_REQS-1:0] requests_r;
wire [NUM_REQS-1:0] requests_rem = requests & ~grant_mask;
wire rem_valid = (| requests_rem);
wire [NUM_REQS-1:0] requests_qual = rem_valid ? requests_rem : requests;
wire [NUM_REQS-1:0] requests_sel = requests_r & requests;
wire [NUM_REQS-1:0] requests_qual = (| requests_sel) ? requests_sel : requests;
always @(posedge clk) begin
if (reset) begin
grant_mask <= '0;
requests_r <= '0;
end else if (grant_ready) begin
grant_mask <= rem_valid ? (grant_mask | grant_onehot) : grant_onehot;
requests_r <= requests_qual & ~grant_onehot;
end
end