texture unit critical path optimization

hw/rtl/libs/VX_sat_fx.v

@@ -1,21 +0,0 @@
-`include "VX_platform.vh"
-
-module VX_sat_fx #(
-    parameter IN_W  = 1,
-    parameter OUT_W = 1,
-    parameter MODEL = 1
-) (
-    input wire [IN_W-1:0] data_in,   
-    output wire [OUT_W-1:0] data_out
-); 
-    `STATIC_ASSERT(((OUT_W+1) < IN_W), ("invalid parameter"))
-
-    if (MODEL == 1) begin
-        assign data_out = data_in[IN_W-1] ? OUT_W'(0) : ((data_in > {OUT_W{1'b1}}) ? {OUT_W{1'b1}} : OUT_W'(data_in));
-    end else begin
-        wire [OUT_W-1:0] underflow_mask = {OUT_W{~data_in[IN_W-1]}};        
-        wire [OUT_W-1:0] overflow_mask = {OUT_W{(| data_in[IN_W-2:OUT_W])}};
-        assign data_out = (data_in[OUT_W-1:0] | overflow_mask) & underflow_mask;
-    end
-
-endmodule