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Fix instruction tracer for superscalar mode (#2901)
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This PR adapts the instr_tracer module to support superscalar mode.
This commit is contained in:
Enrico Zelioli 2025-04-06 13:30:18 +02:00 • committed by GitHub
parent 7b3054156e
commit b9da1d9e2d
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GPG key ID: B5690EEEBB952194
2 changed files with 27 additions and 16 deletions
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30
common/local/util/instr_tracer.sv
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@ -29,11 +29,11 @@ module instr_tracer #(
input logic rstn,
input logic flush_unissued,
input logic flush_all,
input logic [31:0] instruction,
input logic fetch_valid,
input logic fetch_ack,
input logic issue_ack, // issue acknowledged
input scoreboard_entry_t issue_sbe, // issue scoreboard entry
input logic [31:0] instruction [CVA6Cfg.NrIssuePorts-1:0],
input logic [CVA6Cfg.NrIssuePorts-1:0] fetch_valid,
input logic [CVA6Cfg.NrIssuePorts-1:0] fetch_ack,
input logic [CVA6Cfg.NrIssuePorts-1:0] issue_ack, // issue acknowledged
input scoreboard_entry_t [CVA6Cfg.NrIssuePorts-1:0] issue_sbe, // issue scoreboard entry
input logic [CVA6Cfg.NrCommitPorts-1:0][4:0] waddr, // WB stage
input logic [CVA6Cfg.NrCommitPorts-1:0][63:0] wdata,
input logic [CVA6Cfg.NrCommitPorts-1:0] we_gpr,
@ -106,20 +106,24 @@ module instr_tracer #(
// Instruction Decode
// -------------------
// we are decoding an instruction
if (fetch_valid && fetch_ack) begin
decode_instruction = instruction;
decode_queue.push_back(decode_instruction);
for (int unsigned i = 0; i < CVA6Cfg.NrIssuePorts; ++i) begin
if (fetch_valid[i] && fetch_ack[i]) begin
decode_instruction = instruction[i];
decode_queue.push_back(decode_instruction);
end
end
// -------------------
// Instruction Issue
// -------------------
// we got a new issue ack, so put the element from the decode queue to
// the issue queue
if (issue_ack && !flush_unissued) begin
issue_instruction = decode_queue.pop_front();
issue_queue.push_back(issue_instruction);
// also save the scoreboard entry to a separate issue queue
issue_sbe_queue.push_back(scoreboard_entry_t'(issue_sbe));
for (int unsigned i = 0; i < CVA6Cfg.NrIssuePorts; ++i) begin
if (issue_ack[i] && !flush_unissued) begin
issue_instruction = decode_queue.pop_front();
issue_queue.push_back(issue_instruction);
// also save the scoreboard entry to a separate issue queue
issue_sbe_queue.push_back(scoreboard_entry_t'(issue_sbe[i]));
end
end
// --------------------

13
core/cva6.sv
View file

@ -1662,6 +1662,13 @@ module cva6
`endif // PITON_ARIANE
`ifndef VERILATOR
logic [31:0] fetch_instructions[CVA6Cfg.NrIssuePorts-1:0];
for (genvar i = 0; i < CVA6Cfg.NrIssuePorts; ++i) begin
assign fetch_instructions[i] = fetch_entry_if_id[i].instruction;
end
instr_tracer #(
.CVA6Cfg(CVA6Cfg),
.bp_resolve_t(bp_resolve_t),
@ -1675,9 +1682,9 @@ module cva6
.rstn(rst_ni),
.flush_unissued(flush_unissued_instr_ctrl_id),
.flush_all(flush_ctrl_ex),
.instruction(id_stage_i.fetch_entry_i[0].instruction),
.fetch_valid(id_stage_i.fetch_entry_valid_i[0]),
.fetch_ack(id_stage_i.fetch_entry_ready_o[0]),
.instruction(fetch_instructions),
.fetch_valid(id_stage_i.fetch_entry_valid_i),
.fetch_ack(id_stage_i.fetch_entry_ready_o),
.issue_ack(issue_stage_i.i_scoreboard.issue_ack_i),
.issue_sbe(issue_stage_i.i_scoreboard.issue_instr_o),
.waddr(waddr_commit_id),