module __bfloat16__sub( input wire [15:0] x, input wire [15:0] y, output wire [15:0] out ); function automatic [1:0] priority_sel_2b_2way (input reg [1:0] sel, input reg [1:0] case0, input reg [1:0] case1, input reg [1:0] default_value); begin casez (sel) 2'b?1: begin priority_sel_2b_2way = case0; end 2'b10: begin priority_sel_2b_2way = case1; end 2'b00: begin priority_sel_2b_2way = default_value; end default: begin // Propagate X priority_sel_2b_2way = 2'dx; end endcase end endfunction function automatic priority_sel_1b_2way (input reg [1:0] sel, input reg case0, input reg case1, input reg default_value); begin casez (sel) 2'b?1: begin priority_sel_1b_2way = case0; end 2'b10: begin priority_sel_1b_2way = case1; end 2'b00: begin priority_sel_1b_2way = default_value; end default: begin // Propagate X priority_sel_1b_2way = 1'dx; end endcase end endfunction wire [7:0] y_bexp__2; wire literal_28164; wire [7:0] x_bexp__2; wire [7:0] y__1_bexpnot__1; wire [8:0] x_bexp_extended__2; wire [8:0] y__1_bexpnot_extended__1; wire [8:0] full_result; wire overflow_detected; wire [6:0] y_fraction__2; wire [6:0] tuple_index_28172; wire [7:0] x_bexp__3; wire [7:0] literal_28174; wire [7:0] y_bexp__3; wire literal_28176; wire [6:0] x_fraction__1; wire [6:0] y_fraction__3; wire nc; wire y_sign__2; wire [7:0] fraction_x; wire [7:0] fraction_y; wire [7:0] sign_ext_28186; wire [7:0] narrowed_result; wire [7:0] x_bexpor_mask__1; wire [6:0] literal_28189; wire tuple_index_28191; wire [7:0] fraction_x__1; wire [7:0] fraction_y__1; wire [2:0] xddend_x__2_squeezed_const_lsb_bits; wire [7:0] result; wire x_sign__1; wire y_sign__3; wire [8:0] wide_x_squeezed; wire [10:0] wide_y_shift_bits; wire [7:0] shift; wire [10:0] shrl_28205; wire [11:0] shll_28207; wire [8:0] xddend_x__2_squeezed; wire [1:0] literal_28209; wire [9:0] add_28217; wire sticky; wire [11:0] concat_28223; wire [11:0] xbs_fraction__1; wire carry_bit; wire nor_28244; wire nor_28246; wire and_28257; wire nor_28253; wire nor_28254; wire and_28270; wire and_28266; wire [2:0] concat_28278; wire [2:0] concat_28277; wire [3:0] concat_28282; wire [3:0] leading_zeroes; wire [12:0] cancel_fraction; wire [10:0] cancel_fraction__1; wire [10:0] carry_fraction__1; wire [10:0] shifted_fraction; wire [2:0] normal_chunk; wire [2:0] fraction_shift__3; wire [1:0] half_way_chunk; wire do_round_up; wire [8:0] add_28302; wire rounding_carry; wire [8:0] add_28315; wire [4:0] sub_28316; wire fraction_is_zero; wire [9:0] wide_exponent_associative_element; wire [9:0] wide_exponent_associative_element__1; wire [9:0] wide_exponent; wire [9:0] wide_exponent__1; wire [7:0] MAX_EXPONENT; wire [8:0] wide_exponent__2; wire eq_28330; wire eq_28331; wire eq_28332; wire eq_28333; wire [2:0] fraction_shift__2; wire is_operand_inf; wire and_reduce_28351; wire has_pos_inf; wire has_neg_inf; wire [11:0] rounded_fraction; wire [2:0] fraction_shift__1; wire [11:0] shrl_28364; wire is_result_nan; wire result_sign; wire [6:0] result_fraction; wire [6:0] sign_ext_28370; wire result_sign__1; wire [6:0] result_fraction__3; wire [6:0] FRACTION_HIGH_BIT; wire result_sign__2; wire [7:0] result_exponent__2; wire [6:0] result_fraction__4; assign y_bexp__2 = y[14:7]; assign literal_28164 = 1'h0; assign x_bexp__2 = x[14:7]; assign y__1_bexpnot__1 = ~y_bexp__2; assign x_bexp_extended__2 = {literal_28164, x_bexp__2}; assign y__1_bexpnot_extended__1 = {literal_28164, y__1_bexpnot__1}; assign full_result = x_bexp_extended__2 + y__1_bexpnot_extended__1; assign overflow_detected = full_result[8]; assign y_fraction__2 = y[6:0]; assign tuple_index_28172 = x[6:0]; assign x_bexp__3 = overflow_detected ? x_bexp__2 : y_bexp__2; assign literal_28174 = 8'h00; assign y_bexp__3 = overflow_detected ? y_bexp__2 : x_bexp__2; assign literal_28176 = 1'h1; assign x_fraction__1 = overflow_detected ? tuple_index_28172 : y_fraction__2; assign y_fraction__3 = overflow_detected ? y_fraction__2 : tuple_index_28172; assign nc = ~overflow_detected; assign y_sign__2 = y[15:15]; assign fraction_x = {literal_28176, x_fraction__1}; assign fraction_y = {literal_28176, y_fraction__3}; assign sign_ext_28186 = {8{y_bexp__3 != literal_28174}}; assign narrowed_result = full_result[7:0]; assign x_bexpor_mask__1 = {8{nc}}; assign literal_28189 = 7'h00; assign tuple_index_28191 = x[15:15]; assign fraction_x__1 = fraction_x & {8{x_bexp__3 != literal_28174}}; assign fraction_y__1 = fraction_y & sign_ext_28186; assign xddend_x__2_squeezed_const_lsb_bits = 3'h0; assign result = narrowed_result ^ x_bexpor_mask__1; assign x_sign__1 = overflow_detected ? tuple_index_28191 : ~y_sign__2; assign y_sign__3 = overflow_detected ? ~y_sign__2 : tuple_index_28191; assign wide_x_squeezed = {literal_28164, fraction_x__1}; assign wide_y_shift_bits = {fraction_y__1, xddend_x__2_squeezed_const_lsb_bits}; assign shift = result + {literal_28189, overflow_detected}; assign shrl_28205 = shift >= 8'h0b ? 11'h000 : wide_y_shift_bits >> shift; assign shll_28207 = shift >= 8'h0c ? 12'h000 : 12'hfff << shift; assign xddend_x__2_squeezed = x_sign__1 ^ y_sign__3 ? -wide_x_squeezed : wide_x_squeezed; assign literal_28209 = 2'h0; assign add_28217 = {{1{xddend_x__2_squeezed[8]}}, xddend_x__2_squeezed} + {literal_28209, shrl_28205[10:3]}; assign sticky = ~({literal_28164, ~y_fraction__3} | ~sign_ext_28186 | shll_28207[10:3]) != literal_28174; assign concat_28223 = {add_28217[8:0], shrl_28205[2:1], shrl_28205[0] | sticky}; assign xbs_fraction__1 = add_28217[9] ? -concat_28223 : concat_28223; assign carry_bit = xbs_fraction__1[11]; assign nor_28244 = ~(xbs_fraction__1[9] | xbs_fraction__1[8]); assign nor_28246 = ~(xbs_fraction__1[5] | xbs_fraction__1[4]); assign and_28257 = ~(carry_bit | xbs_fraction__1[10]) & nor_28244; assign nor_28253 = ~(xbs_fraction__1[1] | xbs_fraction__1[0]); assign nor_28254 = ~(xbs_fraction__1[3] | xbs_fraction__1[2]); assign and_28270 = ~(xbs_fraction__1[7] | xbs_fraction__1[6]) & nor_28246; assign and_28266 = nor_28254 & nor_28253; assign concat_28278 = {literal_28164, ~(carry_bit | xbs_fraction__1[10] | nor_28244) ? {literal_28176, ~(xbs_fraction__1[9] | ~xbs_fraction__1[8])} : {literal_28164, ~(carry_bit | ~xbs_fraction__1[10])}}; assign concat_28277 = {literal_28176, ~(xbs_fraction__1[7] | xbs_fraction__1[6] | nor_28246) ? {literal_28176, ~(xbs_fraction__1[5] | ~xbs_fraction__1[4])} : {literal_28164, ~(xbs_fraction__1[7] | ~xbs_fraction__1[6])}}; assign concat_28282 = {literal_28176, and_28266, priority_sel_2b_2way({~(xbs_fraction__1[3] | xbs_fraction__1[2] | nor_28253), and_28266}, literal_28209, {literal_28176, ~(xbs_fraction__1[1] | ~xbs_fraction__1[0])}, {nor_28254, ~(xbs_fraction__1[3] | ~xbs_fraction__1[2])})}; assign leading_zeroes = and_28257 & and_28270 ? concat_28282 : {literal_28164, ~(~and_28257 | and_28270) ? concat_28277 : concat_28278}; assign cancel_fraction = leading_zeroes >= 4'hd ? 13'h0000 : {literal_28164, xbs_fraction__1} << leading_zeroes; assign cancel_fraction__1 = cancel_fraction[11:1]; assign carry_fraction__1 = {xbs_fraction__1[11:2], xbs_fraction__1[1] | xbs_fraction__1[0]}; assign shifted_fraction = carry_bit ? carry_fraction__1 : cancel_fraction__1; assign normal_chunk = shifted_fraction[2:0]; assign fraction_shift__3 = 3'h4; assign half_way_chunk = shifted_fraction[3:2]; assign do_round_up = normal_chunk > fraction_shift__3 | half_way_chunk == 2'h3; assign add_28302 = {literal_28164, shifted_fraction[10:3]} + {literal_28174, do_round_up}; assign rounding_carry = add_28302[8]; assign add_28315 = {literal_28164, x_bexp__3} + 9'h001; assign sub_28316 = {4'h0, rounding_carry} - {literal_28164, leading_zeroes}; assign fraction_is_zero = add_28217 == 10'h000 & ~(shrl_28205[1] | shrl_28205[2]) & ~(shrl_28205[0] | sticky); assign wide_exponent_associative_element = {literal_28164, add_28315}; assign wide_exponent_associative_element__1 = {{5{sub_28316[4]}}, sub_28316}; assign wide_exponent = wide_exponent_associative_element + wide_exponent_associative_element__1; assign wide_exponent__1 = wide_exponent & {10{~fraction_is_zero}}; assign MAX_EXPONENT = 8'hff; assign wide_exponent__2 = wide_exponent__1[8:0] & {9{~wide_exponent__1[9]}}; assign eq_28330 = x_bexp__3 == MAX_EXPONENT; assign eq_28331 = x_fraction__1 == literal_28189; assign eq_28332 = y_bexp__3 == MAX_EXPONENT; assign eq_28333 = y_fraction__3 == literal_28189; assign fraction_shift__2 = 3'h3; assign is_operand_inf = eq_28330 & eq_28331 | eq_28332 & eq_28333; assign and_reduce_28351 = &wide_exponent__2[7:0]; assign has_pos_inf = ~(~eq_28330 | ~eq_28331 | x_sign__1) | ~(~eq_28332 | ~eq_28333 | y_sign__3); assign has_neg_inf = eq_28330 & eq_28331 & x_sign__1 | eq_28332 & eq_28333 & y_sign__3; assign rounded_fraction = {add_28302, normal_chunk}; assign fraction_shift__1 = rounding_carry ? fraction_shift__3 : fraction_shift__2; assign shrl_28364 = rounded_fraction >> fraction_shift__1; assign is_result_nan = ~(~eq_28330 | eq_28331) | ~(~eq_28332 | eq_28333) | has_pos_inf & has_neg_inf; assign result_sign = priority_sel_1b_2way({add_28217[9], fraction_is_zero}, x_sign__1 & y_sign__3, ~y_sign__3, y_sign__3); assign result_fraction = shrl_28364[6:0]; assign sign_ext_28370 = {7{~(is_operand_inf | wide_exponent__2[8] | and_reduce_28351 | ~((|wide_exponent__2[8:1]) | wide_exponent__2[0]))}}; assign result_sign__1 = is_operand_inf ? ~has_pos_inf : result_sign; assign result_fraction__3 = result_fraction & sign_ext_28370; assign FRACTION_HIGH_BIT = 7'h40; assign result_sign__2 = ~is_result_nan & result_sign__1; assign result_exponent__2 = is_result_nan | is_operand_inf | wide_exponent__2[8] | and_reduce_28351 ? MAX_EXPONENT : wide_exponent__2[7:0]; assign result_fraction__4 = is_result_nan ? FRACTION_HIGH_BIT : result_fraction__3; assign out = {result_sign__2, result_exponent__2, result_fraction__4}; endmodule