| Line 30... |
Line 30... |
parameter pipeline_pos = 0, //8 bits
|
parameter pipeline_pos = 0, //8 bits
|
|
|
parameter size = size_exponent + size_mantissa + size_exception_field,
|
parameter size = size_exponent + size_mantissa + size_exception_field,
|
parameter size_mul_mantissa = size_mantissa + size_mantissa,
|
parameter size_mul_mantissa = size_mantissa + size_mantissa,
|
parameter size_mul_counter = size_counter + 1)
|
parameter size_mul_counter = size_counter + 1)
|
( input clk,
|
( input [size - 1:0] a_number_i,
|
input rst,
|
|
input [size - 1:0] a_number_i,
|
|
input [size - 1:0] b_number_i,
|
input [size - 1:0] b_number_i,
|
input [size - 1:0] c_number_i,
|
input [size - 1:0] c_number_i,
|
input sub,
|
input sub,
|
output[size - 1:0] resulting_number_o);
|
output[size - 1:0] resulting_number_o);
|
|
|
| Line 52... |
Line 50... |
|
|
wire [size_exponent - 1 : 0] exp_difference;
|
wire [size_exponent - 1 : 0] exp_difference;
|
wire [size_exponent - 1 : 0] unadjusted_exponent;
|
wire [size_exponent - 1 : 0] unadjusted_exponent;
|
wire [size_exponent : 0] exp_inter;
|
wire [size_exponent : 0] exp_inter;
|
|
|
|
wire [size_mantissa - 2 : 0] mul_mantissa;
|
|
|
wire [size_mul_mantissa - 1 : 0] m_ab_mantissa, c_mantissa;
|
wire [size_mul_mantissa - 1 : 0] m_ab_mantissa, c_mantissa;
|
wire [size_exponent : 0] e_ab_number_inter, e_ab_number;
|
wire [size_exponent : 0] e_ab_number_inter, e_ab_number;
|
wire [size_mul_counter - 1 : 0] lz_mul;
|
wire [size_mul_counter - 1 : 0] lz_mul;
|
|
|
wire zero_flag;
|
wire zero_flag;
|
| Line 66... |
Line 66... |
wire [size_mul_mantissa + 1 : 0] normalized_mantissa, adder_mantissa;
|
wire [size_mul_mantissa + 1 : 0] normalized_mantissa, adder_mantissa;
|
wire [size_mul_mantissa : 0] unnormalized_mantissa;
|
wire [size_mul_mantissa : 0] unnormalized_mantissa;
|
wire [size_mul_mantissa - 1 : 0] shifted_m_ab;
|
wire [size_mul_mantissa - 1 : 0] shifted_m_ab;
|
wire [size_mul_mantissa - 1 : 0] m_c, m_ab;
|
wire [size_mul_mantissa - 1 : 0] m_c, m_ab;
|
|
|
wire [size_exception_field - 1 : 0] sp_case_o, sp_case_result_o;
|
wire [size_exception_field - 1 : 0] sp_case_mul_result_o;
|
|
|
|
wire [size_exception_field - 1 : 0] sp_case_result_o;
|
wire [size_mantissa - 2 : 0] final_mantissa;
|
wire [size_mantissa - 2 : 0] final_mantissa;
|
wire [size_exponent - 1 : 0] final_exponent;
|
wire [size_exponent - 1 : 0] final_exponent;
|
wire [size_mantissa : 0] rounded_mantissa;
|
wire [size_mantissa : 0] rounded_mantissa;
|
|
|
|
|
| Line 94... |
Line 96... |
.size_mul_mantissa(size_mul_mantissa))
|
.size_mul_mantissa(size_mul_mantissa))
|
multiply_instance ( .a_mantissa_i(m_a_number),
|
multiply_instance ( .a_mantissa_i(m_a_number),
|
.b_mantissa_i(m_b_number),
|
.b_mantissa_i(m_b_number),
|
.mul_mantissa(m_ab_mantissa));
|
.mul_mantissa(m_ab_mantissa));
|
|
|
|
assign mul_mantissa = m_ab_mantissa[size_mul_mantissa-1]? m_ab_mantissa[size_mul_mantissa-2 : size_mul_mantissa - size_mantissa] :
|
|
m_ab_mantissa[size_mul_mantissa-3 : size_mul_mantissa - size_mantissa - 1];
|
|
|
assign c_mantissa = {1'b0,m_c_number, {(shift_mantissa_0_bits){1'b0}}};
|
assign c_mantissa = {1'b0,m_c_number, {(shift_mantissa_0_bits){1'b0}}};
|
assign e_ab_number_inter = e_a_number + e_b_number;
|
assign e_ab_number_inter = e_a_number + e_b_number;
|
assign e_ab_number = e_ab_number_inter - {(bias_0_bits){1'b1}};
|
assign e_ab_number = e_ab_number_inter - {(bias_0_bits){1'b1}};
|
|
|
//find the greater exponent
|
//find the greater exponent
|
| Line 169... |
Line 174... |
.SIZE_LEAST_S_MANTISSA(size_mul_mantissa+2))
|
.SIZE_LEAST_S_MANTISSA(size_mul_mantissa+2))
|
rounding_instance( .unrounded_mantissa({1'b0, normalized_mantissa[size_mul_mantissa+1 : size_mantissa + 2]}),
|
rounding_instance( .unrounded_mantissa({1'b0, normalized_mantissa[size_mul_mantissa+1 : size_mantissa + 2]}),
|
.dummy_bits({normalized_mantissa[size_mantissa + 1 : 0],final_rounding_bits}),
|
.dummy_bits({normalized_mantissa[size_mantissa + 1 : 0],final_rounding_bits}),
|
.rounded_mantissa(rounded_mantissa));
|
.rounded_mantissa(rounded_mantissa));
|
|
|
//instantiate special_cases_mul_acc component
|
//instantiate special_cases_mul and special_cases_mul_acc components
|
special_cases_mul_acc #( .size_exception_field(size_exception_field),
|
special_cases_mul_acc #( .size_exception_field(size_exception_field),
|
.zero(zero),
|
.zero(zero),
|
.normal_number(normal_number),
|
.normal_number(normal_number),
|
.infinity(infinity),
|
.infinity(infinity),
|
.NaN(NaN))
|
.NaN(NaN))
|
special_cases_mul_acc_instance ( .sp_case_a_number(sp_case_a_number),
|
special_cases_mul_acc_instance ( .sp_case_a_number(sp_case_a_number),
|
.sp_case_b_number(sp_case_b_number),
|
.sp_case_b_number(sp_case_b_number),
|
.sp_case_c_number(sp_case_c_number),
|
.sp_case_c_number(sp_case_c_number),
|
.sp_case_result_o(sp_case_result_o));
|
.sp_case_result_o(sp_case_result_o));
|
|
|
|
special_cases_mul #( .size_exception_field(size_exception_field),
|
|
.zero(zero),
|
|
.normal_number(normal_number),
|
|
.infinity(infinity),
|
|
.NaN(NaN))
|
|
special_cases_mul_instance( .sp_case_a_number(sp_case_a_number),
|
|
.sp_case_b_number(sp_case_b_number),
|
|
.sp_case_result_o(sp_case_mul_result_o));
|
|
|
//set zero_flag in case of equal numbers
|
//set zero_flag in case of equal numbers
|
assign zero_flag = ~((|{rounded_mantissa, sp_case_result_o[1]}) & (|sp_case_result_o));
|
assign zero_flag = ~(|(rounded_mantissa));
|
|
|
//compute resulted_sign
|
//compute resulted_sign
|
assign sign_res = (eff_op)? (!c_greater_exponent[size_exponent]?
|
assign sign_res = (eff_op)? (!c_greater_exponent[size_exponent]?
|
(!ab_greater_exponent[size_exponent]? ~adder_mantissa[size_mul_mantissa+1] : s_c_number) : ~(s_b_number^s_a_number)) : s_c_number;
|
(!ab_greater_exponent[size_exponent]? ~adder_mantissa[size_mul_mantissa+1] : s_c_number) : ~(s_b_number^s_a_number)) : s_c_number;
|
|
|
| Line 193... |
Line 207... |
(rounded_mantissa[size_mantissa : 1]) :
|
(rounded_mantissa[size_mantissa : 1]) :
|
(rounded_mantissa[size_mantissa-1: 0]);
|
(rounded_mantissa[size_mantissa-1: 0]);
|
|
|
assign unadjusted_exponent = exp_inter - lz_mul;
|
assign unadjusted_exponent = exp_inter - lz_mul;
|
assign final_exponent = unadjusted_exponent + 2'd2;
|
assign final_exponent = unadjusted_exponent + 2'd2;
|
assign resulting_number_o = (zero_flag)? {size{1'b0}} :{sp_case_result_o, sign_res, final_exponent, final_mantissa};
|
assign resulting_number_o = (zero_flag)? {size{1'b0}} :
|
|
(!sp_case_a_number || !sp_case_b_number)? {c_number_i[size-1 : size-size_exception_field], s_c_number, c_number_i[size-1-size_exception_field-1 : 0]} :
|
|
(!sp_case_c_number)?
|
|
(eff_op?
|
|
{sp_case_mul_result_o, ~(s_a_number^s_b_number), e_ab_number[size_exponent-1 : 0], mul_mantissa} :
|
|
{sp_case_mul_result_o, s_a_number^s_b_number, e_ab_number[size_exponent-1 : 0], mul_mantissa}) :
|
|
{sp_case_result_o, sign_res, final_exponent, final_mantissa};
|
endmodule
|
endmodule
|
|
|
No newline at end of file
|
No newline at end of file
|
