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tensor: Fix FSM when commit not ready

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This commit is contained in:
Hansung Kim
2024-10-11 20:24:31 -07:00
parent 2934b1bd94
commit 717fe7ff29
1 changed files with 17 additions and 6 deletions
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23
hw/rtl/core/VX_tensor_hopper_core.sv
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@@ -144,17 +144,28 @@ module VX_tensor_hopper_core #(
);
// dummy FSM that generates commits
localparam STATE_IDLE = 4'd0;
logic [1:0] state, state_n;
localparam STATE_FINISH = 4'd15;
logic [3:0] state, state_n;
assign initiate_ready = (state == STATE_IDLE);
always @(*) begin
state_n = state;
// when incremented to 1, count up until wrap-around to 0
if (state != STATE_IDLE) begin
state_n = state + 1'd1;
end
case (state)
STATE_IDLE: begin
state_n = state;
end
STATE_FINISH: begin
// hold until writeback_ready
if (writeback_ready) begin
state_n = STATE_IDLE;
end
end
default: begin
state_n = state + 4'd1;
end
endcase
// kick-off
if (initiate_valid && initiate_ready) begin
@@ -172,7 +183,7 @@ module VX_tensor_hopper_core #(
assign writeback_valid = (state != STATE_IDLE);
assign writeback_wid = '0; // TODO
assign writeback_last = (state == 4'd15);
assign writeback_last = (state == STATE_FINISH);
endmodule