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texture unit critical path optimization

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This commit is contained in:
Blaise Tine
2021-08-05 02:47:26 -07:00
parent deed327890
commit 43ad188ccb
8 changed files with 100 additions and 63 deletions
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17
hw/rtl/tex_unit/VX_tex_lerp.v
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@@ -1,17 +1,16 @@
`include "VX_tex_define.vh"
module VX_tex_lerp #(
) (
input wire [`BLEND_FRAC-1:0] blend,
input wire [31:0] in1,
input wire [31:0] in2,
output wire [31:0] out
module VX_tex_lerp (
input wire [3:0][7:0] in1,
input wire [3:0][7:0] in2,
input wire [8:0] alpha,
input wire [7:0] beta,
output wire [3:0][7:0] out
);
for (genvar i = 0; i < 4; ++i) begin
wire [8:0] blend_m1 = `BLEND_ONE - blend;
wire [16:0] sum = in1[i*8+:8] * blend_m1 + in2[i*8+:8] * blend;
wire [16:0] sum = in1[i] * alpha + in2[i] * beta;
`UNUSED_VAR (sum)
assign out[i*8+:8] = sum[15:8];
assign out[i] = sum[15:8];
end
endmodule