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`include "gfx/gfx_defs.sv"
module gfx_perspective_flow
(
input logic clk,
rst_n,
input logic vertex_start,
output logic stall,
in_start,
out_start,
input logic in_valid,
out_ready,
output logic in_ready,
out_valid
stall
);
localparam STAGES = `FP_INV_STAGES + `FP_MUL_STAGES;
logic[STAGES - 1:0] start_pipes;
assign in_start = start_pipes[`FP_INV_STAGES - 1];
assign out_start = start_pipes[STAGES - 1];
pipeline_flow #(.STAGES(STAGES)) flow
(
.*
);
always_ff @(posedge clk or negedge rst_n)
if (!rst_n)
start_pipes[0] <= 0;
else if (!stall)
start_pipes[0] <= in_valid && vertex_start;
genvar i;
generate
for (i = 1; i < STAGES; ++i) begin: pipeline
always_ff @(posedge clk or negedge rst_n)
if (!rst_n)
start_pipes[i] <= 0;
else if (!stall)
start_pipes[i] <= start_pipes[i - 1];
end
endgenerate
endmodule
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