URL
https://opencores.org/ocsvn/xilinx_virtex_fp_library/xilinx_virtex_fp_library/trunk
Subversion Repositories xilinx_virtex_fp_library
Compare Revisions
- This comparison shows the changes necessary to convert path
/xilinx_virtex_fp_library/trunk
- from Rev 12 to Rev 13
- ↔ Reverse comparison
Rev 12 → Rev 13
/DualPathFPAdder/ClosePath.v
36,6 → 36,7
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wire [size_counter - 1 : 0] lzs; |
wire [size_exponent- 1 : 0] unadjusted_exponent; |
wire [1 : 0] adjust_exponent; |
wire [2 : 0] dummy_bits; |
wire init_shft_bit, shft_bit; |
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45,7 → 46,7
wire [size_in_mantissa : 0] rounded_mantissa; |
wire [size_in_mantissa-1: 0] r_mantissa; |
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assign {shifted_m_b, init_shft_bit} = (exp_difference)? {1'b0, m_b_number[size_in_mantissa-1:1], m_b_number[0]} : {m_b_number, 1'b0}; |
assign {shifted_m_b, init_shft_bit} = (exp_difference)? {1'b0, m_b_number[size_in_mantissa-1:0]} : {m_b_number, 1'b0}; |
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//compute unnormalized_mantissa |
assign adder_mantissa = {1'b0, m_a_number} - {1'b0, shifted_m_b}; |
72,12 → 73,14
.shft(lzs), |
.shifted_a({r_mantissa, dummy_bits})); |
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assign rounded_mantissa = (adder_mantissa[size_in_mantissa + 1])? r_mantissa + 1'b1 : r_mantissa; |
assign rounded_mantissa = (adder_mantissa[size_in_mantissa + 1])? {1'b0, r_mantissa} + 1'b1 : {1'b0, r_mantissa}; |
assign resulted_m_o = (rounded_mantissa[size_in_mantissa])? rounded_mantissa[size_in_mantissa : 1] : |
rounded_mantissa[size_in_mantissa-1:0]; |
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assign adjust_exponent = rounded_mantissa[size_in_mantissa]? 2'd2 : 2'd1; |
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assign ovf = adder_mantissa[size_in_mantissa+1]; |
assign unadjusted_exponent = exp_inter - lzs; |
assign resulted_e_o = unadjusted_exponent + 1'b1; |
assign resulted_e_o = unadjusted_exponent + adjust_exponent; |
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endmodule |
/DualPathFPAdder/DualPathFPAdder.v
63,6 → 63,7
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wire [size_exception_field - 1 : 0] resulted_exception_field; |
wire resulted_sign; |
wire swap; |
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wire zero_flag; |
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84,9 → 85,9
assign exp_inter = (b_greater_exponent[size_exponent])? {1'b0, e_a_number} : {1'b0, e_b_number}; |
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//set shifter always on m_b_number |
assign {m_a_number, m_b_number} = (b_greater_exponent[size_exponent])? |
{{1'b1, a_number_i[size_mantissa - 2 :0]}, {1'b1, b_number_i[size_mantissa - 2 :0]}} : |
{{1'b1, b_number_i[size_mantissa - 2 :0]}, {1'b1, a_number_i[size_mantissa - 2 :0]}}; |
assign {swap, m_a_number, m_b_number} = (b_greater_exponent[size_exponent])? |
{1'b0, {1'b1, a_number_i[size_mantissa - 2 :0]}, {1'b1, b_number_i[size_mantissa - 2 :0]}} : |
{1'b1, {1'b1, b_number_i[size_mantissa - 2 :0]}, {1'b1, a_number_i[size_mantissa - 2 :0]}}; |
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effective_op effective_op_instance( .a_sign(s_a_number), .b_sign(s_b_number), .sub(sub), .eff_op(eff_op)); |
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136,8 → 137,8
//set zero_flag in case of equal numbers |
assign zero_flag = (exp_difference > 1 | !eff_op)? ~(|fp_resulted_m_o) : ~(|cp_resulted_m_o); |
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assign resulted_sign = (exp_difference > 1 | !eff_op)? (!a_greater_exponent[size_exponent]? s_a_number : s_b_number) : ~ovf; |
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assign resulted_sign = (exp_difference > 1 | !eff_op)? (!a_greater_exponent[size_exponent]? s_a_number : (eff_op? ~s_b_number : s_b_number)) : (ovf ^ swap); |
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assign resulted_number_o = (zero_flag)? {size{1'b0}} : |
(exp_difference > 1 | !eff_op)? {resulted_exception_field, resulted_sign, fp_resulted_e_o, fp_resulted_m_o[size_mantissa-2 : 0]}: |
{resulted_exception_field, resulted_sign, cp_resulted_e_o, cp_resulted_m_o[size_mantissa-2 : 0]}; |