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operands optimization

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minor updates

minor updates
This commit is contained in:
Blaise Tine
2023-12-15 14:09:51 -08:00
parent e04e026a14
commit 5a2bc88d20
5 changed files with 142 additions and 157 deletions
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41
hw/rtl/core/VX_scoreboard.sv
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@@ -51,7 +51,6 @@ module VX_scoreboard import VX_gpu_pkg::*; #(
for (genvar i = 0; i < `ISSUE_WIDTH; ++i) begin
reg [`UP(ISSUE_RATIO)-1:0][`NUM_REGS-1:0] inuse_regs;
VX_ibuffer_if staging_if();
wire writeback_fire = writeback_if[i].valid && writeback_if[i].data.eop;
@@ -84,10 +83,17 @@ module VX_scoreboard import VX_gpu_pkg::*; #(
reg [DATAW-1:0] data_out_r;
reg valid_out_r;
wire ready_out;
wire [3:0] ready_masks = ~{inuse_rd, inuse_rs1, inuse_rs2, inuse_rs3};
wire deps_ready = (& ready_masks);
wire valid_in = ibuffer_if[i].valid && deps_ready;
wire ready_in = ~valid_out_r && deps_ready;
wire [DATAW-1:0] data_in = ibuffer_if[i].data;
assign ready_out = scoreboard_if[i].ready;
always @(posedge clk) begin
if (reset) begin
valid_out_r <= 0;
@@ -97,40 +103,25 @@ module VX_scoreboard import VX_gpu_pkg::*; #(
inuse_regs[writeback_if[i].data.wis][writeback_if[i].data.rd] <= 0;
end
if (~valid_out_r) begin
valid_out_r <= ibuffer_if[i].valid && deps_ready;
end else if (staging_if.ready) begin
if (staging_if.data.wb) begin
inuse_regs[staging_if.data.wis][staging_if.data.rd] <= 1;
valid_out_r <= valid_in;
end else if (ready_out) begin
if (scoreboard_if[i].data.wb) begin
inuse_regs[scoreboard_if[i].data.wis][scoreboard_if[i].data.rd] <= 1;
`ifdef PERF_ENABLE
inuse_units[staging_if.data.wis][staging_if.data.rd] <= staging_if.data.ex_type;
inuse_units[scoreboard_if[i].data.wis][scoreboard_if[i].data.rd] <= scoreboard_if[i].data.ex_type;
`endif
end
valid_out_r <= 0;
end
end
if (~valid_out_r) begin
data_out_r <= ibuffer_if[i].data;
data_out_r <= data_in;
end
end
assign ibuffer_if[i].ready = ~valid_out_r && deps_ready;
assign staging_if.valid = valid_out_r;
assign staging_if.data = data_out_r;
VX_elastic_buffer #(
.DATAW (DATAW),
.SIZE (0),
.OUT_REG (2)
) out_buf (
.clk (clk),
.reset (reset),
.valid_in (staging_if.valid),
.ready_in (staging_if.ready),
.data_in (staging_if.data),
.data_out (scoreboard_if[i].data),
.valid_out (scoreboard_if[i].valid),
.ready_out (scoreboard_if[i].ready)
);
assign ibuffer_if[i].ready = ready_in;
assign scoreboard_if[i].valid = valid_out_r;
assign scoreboard_if[i].data = data_out_r;
`ifdef SIMULATION
reg [31:0] timeout_ctr;