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`include "gfx/gfx_defs.sv"
module gfx_fixed_fma_dot
(
input logic clk,
input fixed a0,
b0,
a1,
b1,
c,
input logic stall,
output fixed q
);
fixed q0, a1_hold[`FIXED_FMA_STAGES], b1_hold[`FIXED_FMA_STAGES];
gfx_fixed_fma fma0
(
.a(a0),
.b(b0),
.q(q0),
.*
);
gfx_fixed_fma fma1
(
.a(a1_hold[`FIXED_FMA_STAGES - 1]),
.b(b1_hold[`FIXED_FMA_STAGES - 1]),
.c(q0),
.*
);
integer i;
always_ff @(posedge clk)
if (!stall) begin
a1_hold[0] <= a1;
b1_hold[0] <= b1;
for (i = 1; i < `FIXED_FMA_STAGES; ++i) begin
a1_hold[i] <= a1_hold[i - 1];
b1_hold[i] <= b1_hold[i - 1];
end
end
endmodule
|
