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Remove obvious bugs from store buffer

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This commit is contained in:
Florian Zaruba 2017-08-01 16:13:04 +02:00
parent e80b846d03
commit d330ed32a6
1 changed files with 4 additions and 3 deletions
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7
src/store_buffer.sv
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@ -65,7 +65,7 @@ module store_buffer (
logic [63:0] data;
logic [7:0] be;
logic valid; // this entry is valid, we need this for checking if the address offset matches
} speculative_queue_n [DEPTH-1], speculative_queue_q [DEPTH-1],
} speculative_queue_n [DEPTH-1:0], speculative_queue_q [DEPTH-1:0],
commit_queue_n [DEPTH-1:0], commit_queue_q [DEPTH-1:0];
// keep a status count for both buffers
@ -84,12 +84,13 @@ module store_buffer (
always_comb begin : core_if
automatic logic [DEPTH:0] speculative_status_cnt = speculative_status_cnt_q;
// we are ready if the speculative queue has a space left
ready_o = !(speculative_status_cnt_q != DEPTH-1);
// we are ready if the speculative and the commit queue have a space left
ready_o = (speculative_status_cnt_q < DEPTH) && (commit_status_cnt_q < DEPTH);
// default assignments
speculative_status_cnt_n = speculative_status_cnt_q;
speculative_read_pointer_n = speculative_read_pointer_q;
speculative_write_pointer_n = speculative_write_pointer_q;
speculative_queue_n = speculative_queue_q;
// LSU interface
// we are ready to accept a new entry and the input data is valid
if (ready_o && valid_i) begin