wu-arch/kernels
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

pipeline optimization

Browse Source
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
Download Patch File Download Diff File Expand all files Collapse all files

87
hw/rtl/VX_gpr_fp_ctrl.v
View File

@@ -3,98 +3,49 @@
// control module to support multi-cycle read for fp register
module VX_gpr_fp_ctrl (
input wire clk,
input wire reset,
input wire clk,
input wire reset,
input wire [`NUM_THREADS-1:0][31:0] rs1_int_data,
input wire [`NUM_THREADS-1:0][31:0] rs2_int_data,
input wire [`NUM_THREADS-1:0][31:0] rs1_fp_data,
input wire [`NUM_THREADS-1:0][31:0] rs2_fp_data,
input wire [`NUM_THREADS-1:0][31:0] rs1_data,
input wire [`NUM_THREADS-1:0][31:0] rs2_data,
// outputs
output wire [`NR_BITS-1:0] raddr1,
output wire [`NR_BITS-1:0] raddr2,
output wire [`NR_BITS-1:0] raddr1,
VX_gpr_read_if gpr_read_if
VX_gpr_read_if gpr_read_if
);
// param
localparam GPR_DELAY_WID = 1;
reg [GPR_DELAY_WID-1:0] multi_cyc_state;
reg [`NUM_THREADS-1:0][31:0] tmp_rs1_data;
reg [`NUM_THREADS-1:0][31:0] tmp_rs2_data;
reg [`NUM_THREADS-1:0][31:0] rs1_data;
reg [`NUM_THREADS-1:0][31:0] rs2_data;
reg [`NUM_THREADS-1:0][31:0] rs3_data;
reg [`NUM_THREADS-1:0][31:0] tmp_rs1_data;
reg read_rs3;
wire gpr_delay;
wire gpr_delay = gpr_read_if.valid && gpr_read_if.use_rs3 && ~read_rs3;
wire gpr_fire = gpr_read_if.valid && gpr_read_if.ready;
always @(posedge clk) begin
if (reset) begin
multi_cyc_state <= 0;
read_rs3 <= 0;
end else if (gpr_delay) begin
multi_cyc_state <= 1;
read_rs3 <= 1;
end else if (gpr_fire) begin
multi_cyc_state <= 0;
read_rs3 <= 0;
end
end
// select rs1 data
always @(posedge clk) begin
if (reset) begin
tmp_rs1_data <= 0;
end else begin
if (gpr_delay) begin
if (gpr_read_if.rs1_is_fp) begin
tmp_rs1_data <= rs1_fp_data;
end else begin
tmp_rs1_data <= rs1_int_data;
end
end
end
end
// select rs2 data
always @(posedge clk) begin
if(reset) begin
tmp_rs2_data <= 0;
end else begin
if (gpr_delay) begin
if (gpr_read_if.rs2_is_fp) begin
tmp_rs2_data <= rs2_fp_data;
end else begin
tmp_rs2_data <= rs2_int_data;
end
end
// backup original rs1 data
always @(posedge clk) begin
if (gpr_delay) begin
tmp_rs1_data <= rs1_data;
end
end
// outputs
assign gpr_delay = gpr_read_if.valid && gpr_read_if.use_rs3 && (0 == multi_cyc_state);
assign raddr1 = multi_cyc_state ? gpr_read_if.rs3 : gpr_read_if.rs1;
assign raddr2 = gpr_read_if.rs2;
always @(*) begin
if (gpr_read_if.use_rs3) begin
rs1_data = tmp_rs1_data;
rs2_data = tmp_rs2_data;
rs3_data = rs1_fp_data;
end else begin
rs1_data = gpr_read_if.rs1_is_fp ? rs1_fp_data : rs1_int_data;
rs2_data = gpr_read_if.rs2_is_fp ? rs2_fp_data : rs2_int_data;
rs3_data = {`NUM_THREADS{32'h8000_0000}}; // default value: -0 in single fp
end
end
assign raddr1 = read_rs3 ? gpr_read_if.rs3 : gpr_read_if.rs1;
assign gpr_read_if.ready = ~gpr_delay;
assign gpr_read_if.rs1_data = rs1_data;
assign gpr_read_if.rs1_data = gpr_read_if.use_rs3 ? tmp_rs1_data : rs1_data;
assign gpr_read_if.rs2_data = rs2_data;
assign gpr_read_if.rs3_data = rs3_data;
assign gpr_read_if.rs3_data = rs1_data;
endmodule