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pipeline optimization

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This commit is contained in:
Blaise Tine
2020-07-30 03:06:01 -07:00
parent 60e05ae19a
commit 27e95530ef
20 changed files with 184 additions and 340 deletions
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7
hw/rtl/VX_writeback.v
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@@ -24,7 +24,6 @@ module VX_writeback #(
reg [`NUM_THREADS-1:0] wb_thread_mask [`ISSUEQ_SIZE-1:0];
reg [31:0] wb_curr_PC [`ISSUEQ_SIZE-1:0];
reg [`NR_BITS-1:0] wb_rd [`ISSUEQ_SIZE-1:0];
reg wb_rd_is_fp [`ISSUEQ_SIZE-1:0];
reg [`ISSUEQ_SIZE-1:0] wb_pending, wb_pending_n;
reg [`ISTAG_BITS-1:0] wb_index;
@@ -75,7 +74,6 @@ module VX_writeback #(
wb_thread_mask [alu_commit_if.issue_tag] <= cmt_to_issue_if.alu_data.thread_mask;
wb_curr_PC [alu_commit_if.issue_tag] <= cmt_to_issue_if.alu_data.curr_PC;
wb_rd [alu_commit_if.issue_tag] <= cmt_to_issue_if.alu_data.rd;
wb_rd_is_fp [alu_commit_if.issue_tag] <= cmt_to_issue_if.alu_data.rd_is_fp;
end
if (lsu_commit_if.valid) begin
wb_data [lsu_commit_if.issue_tag] <= lsu_commit_if.data;
@@ -83,7 +81,6 @@ module VX_writeback #(
wb_thread_mask [lsu_commit_if.issue_tag] <= cmt_to_issue_if.lsu_data.thread_mask;
wb_curr_PC [lsu_commit_if.issue_tag] <= cmt_to_issue_if.lsu_data.curr_PC;
wb_rd [lsu_commit_if.issue_tag] <= cmt_to_issue_if.lsu_data.rd;
wb_rd_is_fp [lsu_commit_if.issue_tag] <= cmt_to_issue_if.lsu_data.rd_is_fp;
end
if (csr_commit_if.valid) begin
wb_data [csr_commit_if.issue_tag] <= csr_commit_if.data;
@@ -91,7 +88,6 @@ module VX_writeback #(
wb_thread_mask [csr_commit_if.issue_tag] <= cmt_to_issue_if.csr_data.thread_mask;
wb_curr_PC [csr_commit_if.issue_tag] <= cmt_to_issue_if.csr_data.curr_PC;
wb_rd [csr_commit_if.issue_tag] <= cmt_to_issue_if.csr_data.rd;
wb_rd_is_fp [csr_commit_if.issue_tag] <= cmt_to_issue_if.csr_data.rd_is_fp;
end
if (mul_commit_if.valid) begin
wb_data [mul_commit_if.issue_tag] <= mul_commit_if.data;
@@ -99,7 +95,6 @@ module VX_writeback #(
wb_thread_mask [mul_commit_if.issue_tag] <= cmt_to_issue_if.mul_data.thread_mask;
wb_curr_PC [mul_commit_if.issue_tag] <= cmt_to_issue_if.mul_data.curr_PC;
wb_rd [mul_commit_if.issue_tag] <= cmt_to_issue_if.mul_data.rd;
wb_rd_is_fp [mul_commit_if.issue_tag] <= cmt_to_issue_if.mul_data.rd_is_fp;
end
if (fpu_commit_if.valid) begin
wb_data [fpu_commit_if.issue_tag] <= fpu_commit_if.data;
@@ -107,7 +102,6 @@ module VX_writeback #(
wb_thread_mask [fpu_commit_if.issue_tag] <= cmt_to_issue_if.fpu_data.thread_mask;
wb_curr_PC [fpu_commit_if.issue_tag] <= cmt_to_issue_if.fpu_data.curr_PC;
wb_rd [fpu_commit_if.issue_tag] <= cmt_to_issue_if.fpu_data.rd;
wb_rd_is_fp [fpu_commit_if.issue_tag] <= cmt_to_issue_if.fpu_data.rd_is_fp;
end
wb_pending <= wb_pending_n;
@@ -122,7 +116,6 @@ module VX_writeback #(
assign writeback_if.thread_mask = wb_thread_mask [wb_index];
assign writeback_if.curr_PC = wb_curr_PC [wb_index];
assign writeback_if.rd = wb_rd [wb_index];
assign writeback_if.rd_is_fp = wb_rd_is_fp [wb_index];
assign writeback_if.data = wb_data [wb_index];
// commit back-pressure