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|
`include "gfx/gfx_defs.sv"
module gfx_setup_edge
(
input logic clk,
input raster_xy p,
q,
origin,
input logic stall,
output fixed base,
inc_x,
inc_y
);
fixed delta_x, delta_y, hold_inc_x, hold_inc_y;
gfx_pipes #(.WIDTH($bits(inc_x)), .DEPTH(`FIXED_FMA_DOT_STAGES)) inc_x_pipes
(
.in(hold_inc_x),
.out(inc_x),
.*
);
gfx_pipes #(.WIDTH($bits(inc_y)), .DEPTH(`FIXED_FMA_DOT_STAGES)) inc_y_pipes
(
.in(hold_inc_y),
.out(inc_y),
.*
);
gfx_fixed_fma_dot edge_base
(
.c(0),
.q(base),
.a0(delta_x),
.b0(hold_inc_x),
.a1(delta_y),
.b1(hold_inc_y),
.*
);
always_ff @(posedge clk)
if (!stall) begin
delta_x <= origin.x - q.x;
delta_y <= origin.y - q.y;
hold_inc_x <= p.y - q.y;
hold_inc_y <= q.x - p.x;
end
endmodule
|
