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Fix bug with fnd. 

Fix bug with fnd signal not going high when adding hash entries
This commit is contained in:
bsdevlin 2019-02-27 19:44:40 -05:00
parent e94df14cda
commit 1abb875397
1 changed files with 18 additions and 5 deletions
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23
ip_cores/hash_map/src/rtl/hash_map.sv
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@ -151,6 +151,7 @@ always_ff @ (posedge i_clk) begin
coll_ram_wait <= coll_ram_wait << 1;
o_val <= 0;
o_fnd <= 0;
case (hash_state)
STATE_IDLE: begin
@ -201,8 +202,13 @@ always_ff @ (posedge i_clk) begin
o_val <= 1;
hash_state <= STATE_IDLE;
end else begin
if (coll_node_rd.key == key) begin
o_rdy <= 1;
o_val <= 1;
hash_state <= STATE_IDLE;
o_fnd <= 1;
// Need to use free memory location from FIFO - check we have space
if (free_mem_fifo_emp) begin
end else if (free_mem_fifo_emp) begin
o_val <= 1;
hash_state <= STATE_IDLE;
end else begin
@ -217,8 +223,9 @@ always_ff @ (posedge i_clk) begin
ll_node_wr.key <= key;
ll_bram_if_a.a <= free_mem_fifo_if_out.dat;
free_mem_fifo_if_out.rdy <= 1;
ll_bram_if_a.we <= 1;
ll_bram_if_a.we <= 1;
o_fnd <= 0;
o_rdy <= 1;
o_val <= 1;
hash_state <= STATE_IDLE;
@ -286,8 +293,13 @@ always_ff @ (posedge i_clk) begin
end
// Add
OPCODE_ADD: begin
// Pop a location from the FIFO and use its memory location as the next element
if (ll_node_rd.nxt_ptr == 0) begin
if (ll_node_rd.key == key) begin
o_rdy <= 1;
o_fnd <= 1;
o_val <= 1;
hash_state <= STATE_IDLE;
// Pop a location from the FIFO and use its memory location as the next element
end else if (ll_node_rd.nxt_ptr == 0) begin
ll_node_wr.used <= 1;
ll_node_wr.dat <= dat;
ll_node_wr.nxt_ptr <= 0;
@ -296,6 +308,7 @@ always_ff @ (posedge i_clk) begin
free_mem_fifo_if_out.rdy <= 1;
ll_bram_if_a.we <= 1;
o_rdy <= 1;
o_fnd <= 0;
o_val <= 1;
hash_state <= STATE_IDLE;
end else begin