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minor updates

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This commit is contained in:
Blaise Tine
2021-04-04 03:48:01 -07:00
parent bc091d52c4
commit 3c7754dcf3
4 changed files with 39 additions and 23 deletions
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44
hw/rtl/VX_lsu_unit.v
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@@ -76,6 +76,7 @@ module VX_lsu_unit #(
reg [`LSUQ_SIZE-1:0][`NUM_THREADS-1:0] rsp_rem_mask;
wire [`NUM_THREADS-1:0] rsp_rem_mask_n;
wire [`NUM_THREADS-1:0] rsp_tmask;
reg [`NUM_THREADS-1:0] req_sent_mask;
wire sent_all_ready;
@@ -96,12 +97,12 @@ module VX_lsu_unit #(
&& (0 == req_sent_mask) // first submission only
&& req_wb; // loads only
wire mbuf_pop = dcache_rsp_fire && (rsp_rem_mask_n == 0 || rsp_is_dup);
wire mbuf_pop = dcache_rsp_fire && ~(|rsp_rem_mask_n);
assign mbuf_raddr = dcache_rsp_if.tag[`LSUQ_ADDR_BITS-1:0];
VX_index_buffer #(
.DATAW (`NW_BITS + 32 + `NR_BITS + 1 + `LSU_BITS + (`NUM_THREADS * 2) + 1),
.DATAW (`NW_BITS + 32 + `NUM_THREADS + `NR_BITS + 1 + `LSU_BITS + (`NUM_THREADS * 2) + 1),
.SIZE (`LSUQ_SIZE)
) req_metadata (
.clk (clk),
@@ -109,23 +110,33 @@ module VX_lsu_unit #(
.write_addr (mbuf_waddr),
.acquire_slot (mbuf_push),
.read_addr (mbuf_raddr),
.write_data ({req_wid, req_pc, req_rd, req_wb, req_type, req_offset, req_is_dup}),
.read_data ({rsp_wid, rsp_pc, rsp_rd, rsp_wb, rsp_type, rsp_offset, rsp_is_dup}),
.write_data ({req_wid, req_pc, req_tmask, req_rd, req_wb, req_type, req_offset, req_is_dup}),
.read_data ({rsp_wid, rsp_pc, rsp_tmask, rsp_rd, rsp_wb, rsp_type, rsp_offset, rsp_is_dup}),
.release_addr (mbuf_raddr),
.release_slot (mbuf_pop),
.full (mbuf_full)
.full (mbuf_full),
`UNUSED_PIN (empty)
);
always @(posedge clk) begin
if (mbuf_push) begin
pending_tags[mbuf_waddr] <= req_tag;
end
end
assign sent_all_ready = (&(dcache_req_if.ready | req_sent_mask | ~req_tmask))
|| (req_is_dup & dcache_req_if.ready[0]);
|| (req_is_dup & dcache_req_if.ready[0]);
always @(posedge clk) begin
if (reset || sent_all_ready) begin
if (reset) begin
req_sent_mask <= 0;
end else begin
req_sent_mask <= req_sent_mask | dcache_req_fire;
if (sent_all_ready)
req_sent_mask <= 0;
else
req_sent_mask <= req_sent_mask | dcache_req_fire;
end
end
end
// need to hold the acquired tag index until the full request is submitted
reg [`LSUQ_ADDR_BITS-1:0] req_tag_hold;
@@ -138,8 +149,7 @@ module VX_lsu_unit #(
assign rsp_rem_mask_n = rsp_rem_mask[mbuf_raddr] & ~dcache_rsp_if.valid;
always @(posedge clk) begin
if (mbuf_push) begin
rsp_rem_mask[mbuf_waddr] <= req_tmask;
pending_tags[mbuf_waddr] <= req_tag;
rsp_rem_mask[mbuf_waddr] <= req_is_dup ? (`NUM_THREADS)'(1) : req_tmask;
end
if (dcache_rsp_fire) begin
rsp_rem_mask[mbuf_raddr] <= rsp_rem_mask_n;
@@ -211,7 +221,7 @@ module VX_lsu_unit #(
// load response formatting
reg [`NUM_THREADS-1:0][31:0] rsp_data;
wire [`NUM_THREADS-1:0] rsp_tmask;
wire [`NUM_THREADS-1:0] rsp_tmask_qual;
for (genvar i = 0; i < `NUM_THREADS; i++) begin
wire [31:0] src_data = (i == 0 || rsp_is_dup) ? dcache_rsp_if.data[0] : dcache_rsp_if.data[i];
@@ -227,14 +237,14 @@ module VX_lsu_unit #(
case (`LSU_FMT(rsp_type))
`FMT_B: rsp_data[i] = 32'(signed'(rsp_data_shifted[7:0]));
`FMT_H: rsp_data[i] = 32'(signed'(rsp_data_shifted[15:0]));
`FMT_BU: rsp_data[i] = 32'(rsp_data_shifted[7:0]);
`FMT_HU: rsp_data[i] = 32'(rsp_data_shifted[15:0]);
`FMT_BU: rsp_data[i] = 32'(unsigned'(rsp_data_shifted[7:0]));
`FMT_HU: rsp_data[i] = 32'(unsigned'(rsp_data_shifted[15:0]));
default: rsp_data[i] = rsp_data_shifted;
endcase
end
end
assign rsp_tmask = rsp_is_dup ? rsp_rem_mask[mbuf_raddr] : dcache_rsp_if.valid;
assign rsp_tmask_qual = rsp_is_dup ? rsp_tmask : dcache_rsp_if.valid;
// send load commit
@@ -247,7 +257,7 @@ module VX_lsu_unit #(
.clk (clk),
.reset (reset),
.enable (!load_rsp_stall),
.data_in ({(| dcache_rsp_if.valid), rsp_wid, rsp_tmask, rsp_pc, rsp_rd, rsp_wb, rsp_data, mbuf_pop}),
.data_in ({(| dcache_rsp_if.valid), rsp_wid, rsp_tmask_qual, rsp_pc, rsp_rd, rsp_wb, rsp_data, mbuf_pop}),
.data_out ({ld_commit_if.valid, ld_commit_if.wid, ld_commit_if.tmask, ld_commit_if.PC, ld_commit_if.rd, ld_commit_if.wb, ld_commit_if.data, ld_commit_if.eop})
);
@@ -291,4 +301,4 @@ module VX_lsu_unit #(
end
`endif
endmodule
endmodule