OpenCores
URL https://opencores.org/ocsvn/double_fpu/double_fpu/trunk

Subversion Repositories double_fpu

Compare Revisions

  • This comparison shows the changes necessary to convert path 
    /
    from Rev 9 to Rev 10
    ↔ Reverse comparison
  •

Rev 9 → Rev 10

/branches/avendor/fpu_div.v
72,7 → 72,7
wire [10:0] expon_b = opb[62:52];
wire a_is_norm = |expon_a;
wire b_is_norm = |expon_b;
wire a_is_zero = !(opa[62:0]);
wire a_is_zero = !(|opa[62:0]);
wire [11:0] exponent_a = { 1'b0, expon_a};
wire [11:0] exponent_b = { 1'b0, expon_b};
reg [51:0] dividend_a;
92,7 → 92,6
reg remainder_msb;
reg count_nonzero_reg;
reg count_nonzero_reg_2;
wire count_preset = (count_index == preset);
reg [11:0] expon_term;
reg expon_uf_1;
reg [11:0] expon_uf_term_1;
296,117 → 295,117
 
always @(dividend_a)
casex(dividend_a)
52'b1???????????????????????????????????????????????????: dividend_shift = 0;
52'b01??????????????????????????????????????????????????: dividend_shift = 1;
52'b001?????????????????????????????????????????????????: dividend_shift = 2;
52'b0001????????????????????????????????????????????????: dividend_shift = 3;
52'b00001???????????????????????????????????????????????: dividend_shift = 4;
52'b000001??????????????????????????????????????????????: dividend_shift = 5;
52'b0000001?????????????????????????????????????????????: dividend_shift = 6;
52'b00000001????????????????????????????????????????????: dividend_shift = 7;
52'b000000001???????????????????????????????????????????: dividend_shift = 8;
52'b0000000001??????????????????????????????????????????: dividend_shift = 9;
52'b00000000001?????????????????????????????????????????: dividend_shift = 10;
52'b000000000001????????????????????????????????????????: dividend_shift = 11;
52'b0000000000001???????????????????????????????????????: dividend_shift = 12;
52'b00000000000001??????????????????????????????????????: dividend_shift = 13;
52'b000000000000001?????????????????????????????????????: dividend_shift = 14;
52'b0000000000000001????????????????????????????????????: dividend_shift = 15;
52'b00000000000000001???????????????????????????????????: dividend_shift = 16;
52'b000000000000000001??????????????????????????????????: dividend_shift = 17;
52'b0000000000000000001?????????????????????????????????: dividend_shift = 18;
52'b00000000000000000001????????????????????????????????: dividend_shift = 19;
52'b000000000000000000001???????????????????????????????: dividend_shift = 20;
52'b0000000000000000000001??????????????????????????????: dividend_shift = 21;
52'b00000000000000000000001?????????????????????????????: dividend_shift = 22;
52'b000000000000000000000001????????????????????????????: dividend_shift = 23;
52'b0000000000000000000000001???????????????????????????: dividend_shift = 24;
52'b00000000000000000000000001??????????????????????????: dividend_shift = 25;
52'b000000000000000000000000001?????????????????????????: dividend_shift = 26;
52'b0000000000000000000000000001????????????????????????: dividend_shift = 27;
52'b00000000000000000000000000001???????????????????????: dividend_shift = 28;
52'b000000000000000000000000000001??????????????????????: dividend_shift = 29;
52'b0000000000000000000000000000001?????????????????????: dividend_shift = 30;
52'b00000000000000000000000000000001????????????????????: dividend_shift = 31;
52'b000000000000000000000000000000001???????????????????: dividend_shift = 32;
52'b0000000000000000000000000000000001??????????????????: dividend_shift = 33;
52'b00000000000000000000000000000000001?????????????????: dividend_shift = 34;
52'b000000000000000000000000000000000001????????????????: dividend_shift = 35;
52'b0000000000000000000000000000000000001???????????????: dividend_shift = 36;
52'b00000000000000000000000000000000000001??????????????: dividend_shift = 37;
52'b000000000000000000000000000000000000001?????????????: dividend_shift = 38;
52'b0000000000000000000000000000000000000001????????????: dividend_shift = 39;
52'b00000000000000000000000000000000000000001???????????: dividend_shift = 40;
52'b000000000000000000000000000000000000000001??????????: dividend_shift = 41;
52'b0000000000000000000000000000000000000000001?????????: dividend_shift = 42;
52'b00000000000000000000000000000000000000000001????????: dividend_shift = 43;
52'b000000000000000000000000000000000000000000001???????: dividend_shift = 44;
52'b0000000000000000000000000000000000000000000001??????: dividend_shift = 45;
52'b00000000000000000000000000000000000000000000001?????: dividend_shift = 46;
52'b000000000000000000000000000000000000000000000001????: dividend_shift = 47;
52'b0000000000000000000000000000000000000000000000001???: dividend_shift = 48;
52'b00000000000000000000000000000000000000000000000001??: dividend_shift = 49;
52'b000000000000000000000000000000000000000000000000001?: dividend_shift = 50;
52'b0000000000000000000000000000000000000000000000000001: dividend_shift = 51;
52'b0000000000000000000000000000000000000000000000000000: dividend_shift = 52;
52'b1???????????????????????????????????????????????????: dividend_shift <= 0;
52'b01??????????????????????????????????????????????????: dividend_shift <= 1;
52'b001?????????????????????????????????????????????????: dividend_shift <= 2;
52'b0001????????????????????????????????????????????????: dividend_shift <= 3;
52'b00001???????????????????????????????????????????????: dividend_shift <= 4;
52'b000001??????????????????????????????????????????????: dividend_shift <= 5;
52'b0000001?????????????????????????????????????????????: dividend_shift <= 6;
52'b00000001????????????????????????????????????????????: dividend_shift <= 7;
52'b000000001???????????????????????????????????????????: dividend_shift <= 8;
52'b0000000001??????????????????????????????????????????: dividend_shift <= 9;
52'b00000000001?????????????????????????????????????????: dividend_shift <= 10;
52'b000000000001????????????????????????????????????????: dividend_shift <= 11;
52'b0000000000001???????????????????????????????????????: dividend_shift <= 12;
52'b00000000000001??????????????????????????????????????: dividend_shift <= 13;
52'b000000000000001?????????????????????????????????????: dividend_shift <= 14;
52'b0000000000000001????????????????????????????????????: dividend_shift <= 15;
52'b00000000000000001???????????????????????????????????: dividend_shift <= 16;
52'b000000000000000001??????????????????????????????????: dividend_shift <= 17;
52'b0000000000000000001?????????????????????????????????: dividend_shift <= 18;
52'b00000000000000000001????????????????????????????????: dividend_shift <= 19;
52'b000000000000000000001???????????????????????????????: dividend_shift <= 20;
52'b0000000000000000000001??????????????????????????????: dividend_shift <= 21;
52'b00000000000000000000001?????????????????????????????: dividend_shift <= 22;
52'b000000000000000000000001????????????????????????????: dividend_shift <= 23;
52'b0000000000000000000000001???????????????????????????: dividend_shift <= 24;
52'b00000000000000000000000001??????????????????????????: dividend_shift <= 25;
52'b000000000000000000000000001?????????????????????????: dividend_shift <= 26;
52'b0000000000000000000000000001????????????????????????: dividend_shift <= 27;
52'b00000000000000000000000000001???????????????????????: dividend_shift <= 28;
52'b000000000000000000000000000001??????????????????????: dividend_shift <= 29;
52'b0000000000000000000000000000001?????????????????????: dividend_shift <= 30;
52'b00000000000000000000000000000001????????????????????: dividend_shift <= 31;
52'b000000000000000000000000000000001???????????????????: dividend_shift <= 32;
52'b0000000000000000000000000000000001??????????????????: dividend_shift <= 33;
52'b00000000000000000000000000000000001?????????????????: dividend_shift <= 34;
52'b000000000000000000000000000000000001????????????????: dividend_shift <= 35;
52'b0000000000000000000000000000000000001???????????????: dividend_shift <= 36;
52'b00000000000000000000000000000000000001??????????????: dividend_shift <= 37;
52'b000000000000000000000000000000000000001?????????????: dividend_shift <= 38;
52'b0000000000000000000000000000000000000001????????????: dividend_shift <= 39;
52'b00000000000000000000000000000000000000001???????????: dividend_shift <= 40;
52'b000000000000000000000000000000000000000001??????????: dividend_shift <= 41;
52'b0000000000000000000000000000000000000000001?????????: dividend_shift <= 42;
52'b00000000000000000000000000000000000000000001????????: dividend_shift <= 43;
52'b000000000000000000000000000000000000000000001???????: dividend_shift <= 44;
52'b0000000000000000000000000000000000000000000001??????: dividend_shift <= 45;
52'b00000000000000000000000000000000000000000000001?????: dividend_shift <= 46;
52'b000000000000000000000000000000000000000000000001????: dividend_shift <= 47;
52'b0000000000000000000000000000000000000000000000001???: dividend_shift <= 48;
52'b00000000000000000000000000000000000000000000000001??: dividend_shift <= 49;
52'b000000000000000000000000000000000000000000000000001?: dividend_shift <= 50;
52'b0000000000000000000000000000000000000000000000000001: dividend_shift <= 51;
52'b0000000000000000000000000000000000000000000000000000: dividend_shift <= 52;
endcase
always @(divisor_b)
casex(divisor_b)
52'b1???????????????????????????????????????????????????: divisor_shift = 0;
52'b01??????????????????????????????????????????????????: divisor_shift = 1;
52'b001?????????????????????????????????????????????????: divisor_shift = 2;
52'b0001????????????????????????????????????????????????: divisor_shift = 3;
52'b00001???????????????????????????????????????????????: divisor_shift = 4;
52'b000001??????????????????????????????????????????????: divisor_shift = 5;
52'b0000001?????????????????????????????????????????????: divisor_shift = 6;
52'b00000001????????????????????????????????????????????: divisor_shift = 7;
52'b000000001???????????????????????????????????????????: divisor_shift = 8;
52'b0000000001??????????????????????????????????????????: divisor_shift = 9;
52'b00000000001?????????????????????????????????????????: divisor_shift = 10;
52'b000000000001????????????????????????????????????????: divisor_shift = 11;
52'b0000000000001???????????????????????????????????????: divisor_shift = 12;
52'b00000000000001??????????????????????????????????????: divisor_shift = 13;
52'b000000000000001?????????????????????????????????????: divisor_shift = 14;
52'b0000000000000001????????????????????????????????????: divisor_shift = 15;
52'b00000000000000001???????????????????????????????????: divisor_shift = 16;
52'b000000000000000001??????????????????????????????????: divisor_shift = 17;
52'b0000000000000000001?????????????????????????????????: divisor_shift = 18;
52'b00000000000000000001????????????????????????????????: divisor_shift = 19;
52'b000000000000000000001???????????????????????????????: divisor_shift = 20;
52'b0000000000000000000001??????????????????????????????: divisor_shift = 21;
52'b00000000000000000000001?????????????????????????????: divisor_shift = 22;
52'b000000000000000000000001????????????????????????????: divisor_shift = 23;
52'b0000000000000000000000001???????????????????????????: divisor_shift = 24;
52'b00000000000000000000000001??????????????????????????: divisor_shift = 25;
52'b000000000000000000000000001?????????????????????????: divisor_shift = 26;
52'b0000000000000000000000000001????????????????????????: divisor_shift = 27;
52'b00000000000000000000000000001???????????????????????: divisor_shift = 28;
52'b000000000000000000000000000001??????????????????????: divisor_shift = 29;
52'b0000000000000000000000000000001?????????????????????: divisor_shift = 30;
52'b00000000000000000000000000000001????????????????????: divisor_shift = 31;
52'b000000000000000000000000000000001???????????????????: divisor_shift = 32;
52'b0000000000000000000000000000000001??????????????????: divisor_shift = 33;
52'b00000000000000000000000000000000001?????????????????: divisor_shift = 34;
52'b000000000000000000000000000000000001????????????????: divisor_shift = 35;
52'b0000000000000000000000000000000000001???????????????: divisor_shift = 36;
52'b00000000000000000000000000000000000001??????????????: divisor_shift = 37;
52'b000000000000000000000000000000000000001?????????????: divisor_shift = 38;
52'b0000000000000000000000000000000000000001????????????: divisor_shift = 39;
52'b00000000000000000000000000000000000000001???????????: divisor_shift = 40;
52'b000000000000000000000000000000000000000001??????????: divisor_shift = 41;
52'b0000000000000000000000000000000000000000001?????????: divisor_shift = 42;
52'b00000000000000000000000000000000000000000001????????: divisor_shift = 43;
52'b000000000000000000000000000000000000000000001???????: divisor_shift = 44;
52'b0000000000000000000000000000000000000000000001??????: divisor_shift = 45;
52'b00000000000000000000000000000000000000000000001?????: divisor_shift = 46;
52'b000000000000000000000000000000000000000000000001????: divisor_shift = 47;
52'b0000000000000000000000000000000000000000000000001???: divisor_shift = 48;
52'b00000000000000000000000000000000000000000000000001??: divisor_shift = 49;
52'b000000000000000000000000000000000000000000000000001?: divisor_shift = 50;
52'b0000000000000000000000000000000000000000000000000001: divisor_shift = 51;
52'b0000000000000000000000000000000000000000000000000000: divisor_shift = 52;
52'b1???????????????????????????????????????????????????: divisor_shift <= 0;
52'b01??????????????????????????????????????????????????: divisor_shift <= 1;
52'b001?????????????????????????????????????????????????: divisor_shift <= 2;
52'b0001????????????????????????????????????????????????: divisor_shift <= 3;
52'b00001???????????????????????????????????????????????: divisor_shift <= 4;
52'b000001??????????????????????????????????????????????: divisor_shift <= 5;
52'b0000001?????????????????????????????????????????????: divisor_shift <= 6;
52'b00000001????????????????????????????????????????????: divisor_shift <= 7;
52'b000000001???????????????????????????????????????????: divisor_shift <= 8;
52'b0000000001??????????????????????????????????????????: divisor_shift <= 9;
52'b00000000001?????????????????????????????????????????: divisor_shift <= 10;
52'b000000000001????????????????????????????????????????: divisor_shift <= 11;
52'b0000000000001???????????????????????????????????????: divisor_shift <= 12;
52'b00000000000001??????????????????????????????????????: divisor_shift <= 13;
52'b000000000000001?????????????????????????????????????: divisor_shift <= 14;
52'b0000000000000001????????????????????????????????????: divisor_shift <= 15;
52'b00000000000000001???????????????????????????????????: divisor_shift <= 16;
52'b000000000000000001??????????????????????????????????: divisor_shift <= 17;
52'b0000000000000000001?????????????????????????????????: divisor_shift <= 18;
52'b00000000000000000001????????????????????????????????: divisor_shift <= 19;
52'b000000000000000000001???????????????????????????????: divisor_shift <= 20;
52'b0000000000000000000001??????????????????????????????: divisor_shift <= 21;
52'b00000000000000000000001?????????????????????????????: divisor_shift <= 22;
52'b000000000000000000000001????????????????????????????: divisor_shift <= 23;
52'b0000000000000000000000001???????????????????????????: divisor_shift <= 24;
52'b00000000000000000000000001??????????????????????????: divisor_shift <= 25;
52'b000000000000000000000000001?????????????????????????: divisor_shift <= 26;
52'b0000000000000000000000000001????????????????????????: divisor_shift <= 27;
52'b00000000000000000000000000001???????????????????????: divisor_shift <= 28;
52'b000000000000000000000000000001??????????????????????: divisor_shift <= 29;
52'b0000000000000000000000000000001?????????????????????: divisor_shift <= 30;
52'b00000000000000000000000000000001????????????????????: divisor_shift <= 31;
52'b000000000000000000000000000000001???????????????????: divisor_shift <= 32;
52'b0000000000000000000000000000000001??????????????????: divisor_shift <= 33;
52'b00000000000000000000000000000000001?????????????????: divisor_shift <= 34;
52'b000000000000000000000000000000000001????????????????: divisor_shift <= 35;
52'b0000000000000000000000000000000000001???????????????: divisor_shift <= 36;
52'b00000000000000000000000000000000000001??????????????: divisor_shift <= 37;
52'b000000000000000000000000000000000000001?????????????: divisor_shift <= 38;
52'b0000000000000000000000000000000000000001????????????: divisor_shift <= 39;
52'b00000000000000000000000000000000000000001???????????: divisor_shift <= 40;
52'b000000000000000000000000000000000000000001??????????: divisor_shift <= 41;
52'b0000000000000000000000000000000000000000001?????????: divisor_shift <= 42;
52'b00000000000000000000000000000000000000000001????????: divisor_shift <= 43;
52'b000000000000000000000000000000000000000000001???????: divisor_shift <= 44;
52'b0000000000000000000000000000000000000000000001??????: divisor_shift <= 45;
52'b00000000000000000000000000000000000000000000001?????: divisor_shift <= 46;
52'b000000000000000000000000000000000000000000000001????: divisor_shift <= 47;
52'b0000000000000000000000000000000000000000000000001???: divisor_shift <= 48;
52'b00000000000000000000000000000000000000000000000001??: divisor_shift <= 49;
52'b000000000000000000000000000000000000000000000000001?: divisor_shift <= 50;
52'b0000000000000000000000000000000000000000000000000001: divisor_shift <= 51;
52'b0000000000000000000000000000000000000000000000000000: divisor_shift <= 52;
endcase
/branches/avendor/fpu_sub.v
157,62 → 157,62
always @(diff)
casex(diff)
55'b1??????????????????????????????????????????????????????: diff_shift = 0;
55'b01?????????????????????????????????????????????????????: diff_shift = 1;
55'b001????????????????????????????????????????????????????: diff_shift = 2;
55'b0001???????????????????????????????????????????????????: diff_shift = 3;
55'b00001??????????????????????????????????????????????????: diff_shift = 4;
55'b000001?????????????????????????????????????????????????: diff_shift = 5;
55'b0000001????????????????????????????????????????????????: diff_shift = 6;
55'b00000001???????????????????????????????????????????????: diff_shift = 7;
55'b000000001??????????????????????????????????????????????: diff_shift = 8;
55'b0000000001?????????????????????????????????????????????: diff_shift = 9;
55'b00000000001????????????????????????????????????????????: diff_shift = 10;
55'b000000000001???????????????????????????????????????????: diff_shift = 11;
55'b0000000000001??????????????????????????????????????????: diff_shift = 12;
55'b00000000000001?????????????????????????????????????????: diff_shift = 13;
55'b000000000000001????????????????????????????????????????: diff_shift = 14;
55'b0000000000000001???????????????????????????????????????: diff_shift = 15;
55'b00000000000000001??????????????????????????????????????: diff_shift = 16;
55'b000000000000000001?????????????????????????????????????: diff_shift = 17;
55'b0000000000000000001????????????????????????????????????: diff_shift = 18;
55'b00000000000000000001???????????????????????????????????: diff_shift = 19;
55'b000000000000000000001??????????????????????????????????: diff_shift = 20;
55'b0000000000000000000001?????????????????????????????????: diff_shift = 21;
55'b00000000000000000000001????????????????????????????????: diff_shift = 22;
55'b000000000000000000000001???????????????????????????????: diff_shift = 23;
55'b0000000000000000000000001??????????????????????????????: diff_shift = 24;
55'b00000000000000000000000001?????????????????????????????: diff_shift = 25;
55'b000000000000000000000000001????????????????????????????: diff_shift = 26;
55'b0000000000000000000000000001???????????????????????????: diff_shift = 27;
55'b00000000000000000000000000001??????????????????????????: diff_shift = 28;
55'b000000000000000000000000000001?????????????????????????: diff_shift = 29;
55'b0000000000000000000000000000001????????????????????????: diff_shift = 30;
55'b00000000000000000000000000000001???????????????????????: diff_shift = 31;
55'b000000000000000000000000000000001??????????????????????: diff_shift = 32;
55'b0000000000000000000000000000000001?????????????????????: diff_shift = 33;
55'b00000000000000000000000000000000001????????????????????: diff_shift = 34;
55'b000000000000000000000000000000000001???????????????????: diff_shift = 35;
55'b0000000000000000000000000000000000001??????????????????: diff_shift = 36;
55'b00000000000000000000000000000000000001?????????????????: diff_shift = 37;
55'b000000000000000000000000000000000000001????????????????: diff_shift = 38;
55'b0000000000000000000000000000000000000001???????????????: diff_shift = 39;
55'b00000000000000000000000000000000000000001??????????????: diff_shift = 40;
55'b000000000000000000000000000000000000000001?????????????: diff_shift = 41;
55'b0000000000000000000000000000000000000000001????????????: diff_shift = 42;
55'b00000000000000000000000000000000000000000001???????????: diff_shift = 43;
55'b000000000000000000000000000000000000000000001??????????: diff_shift = 44;
55'b0000000000000000000000000000000000000000000001?????????: diff_shift = 45;
55'b00000000000000000000000000000000000000000000001????????: diff_shift = 46;
55'b000000000000000000000000000000000000000000000001???????: diff_shift = 47;
55'b0000000000000000000000000000000000000000000000001??????: diff_shift = 48;
55'b00000000000000000000000000000000000000000000000001?????: diff_shift = 49;
55'b000000000000000000000000000000000000000000000000001????: diff_shift = 50;
55'b0000000000000000000000000000000000000000000000000001???: diff_shift = 51;
55'b00000000000000000000000000000000000000000000000000001??: diff_shift = 52;
55'b000000000000000000000000000000000000000000000000000001?: diff_shift = 53;
55'b0000000000000000000000000000000000000000000000000000001: diff_shift = 54;
55'b0000000000000000000000000000000000000000000000000000000: diff_shift = 55;
55'b1??????????????????????????????????????????????????????: diff_shift <= 0;
55'b01?????????????????????????????????????????????????????: diff_shift <= 1;
55'b001????????????????????????????????????????????????????: diff_shift <= 2;
55'b0001???????????????????????????????????????????????????: diff_shift <= 3;
55'b00001??????????????????????????????????????????????????: diff_shift <= 4;
55'b000001?????????????????????????????????????????????????: diff_shift <= 5;
55'b0000001????????????????????????????????????????????????: diff_shift <= 6;
55'b00000001???????????????????????????????????????????????: diff_shift <= 7;
55'b000000001??????????????????????????????????????????????: diff_shift <= 8;
55'b0000000001?????????????????????????????????????????????: diff_shift <= 9;
55'b00000000001????????????????????????????????????????????: diff_shift <= 10;
55'b000000000001???????????????????????????????????????????: diff_shift <= 11;
55'b0000000000001??????????????????????????????????????????: diff_shift <= 12;
55'b00000000000001?????????????????????????????????????????: diff_shift <= 13;
55'b000000000000001????????????????????????????????????????: diff_shift <= 14;
55'b0000000000000001???????????????????????????????????????: diff_shift <= 15;
55'b00000000000000001??????????????????????????????????????: diff_shift <= 16;
55'b000000000000000001?????????????????????????????????????: diff_shift <= 17;
55'b0000000000000000001????????????????????????????????????: diff_shift <= 18;
55'b00000000000000000001???????????????????????????????????: diff_shift <= 19;
55'b000000000000000000001??????????????????????????????????: diff_shift <= 20;
55'b0000000000000000000001?????????????????????????????????: diff_shift <= 21;
55'b00000000000000000000001????????????????????????????????: diff_shift <= 22;
55'b000000000000000000000001???????????????????????????????: diff_shift <= 23;
55'b0000000000000000000000001??????????????????????????????: diff_shift <= 24;
55'b00000000000000000000000001?????????????????????????????: diff_shift <= 25;
55'b000000000000000000000000001????????????????????????????: diff_shift <= 26;
55'b0000000000000000000000000001???????????????????????????: diff_shift <= 27;
55'b00000000000000000000000000001??????????????????????????: diff_shift <= 28;
55'b000000000000000000000000000001?????????????????????????: diff_shift <= 29;
55'b0000000000000000000000000000001????????????????????????: diff_shift <= 30;
55'b00000000000000000000000000000001???????????????????????: diff_shift <= 31;
55'b000000000000000000000000000000001??????????????????????: diff_shift <= 32;
55'b0000000000000000000000000000000001?????????????????????: diff_shift <= 33;
55'b00000000000000000000000000000000001????????????????????: diff_shift <= 34;
55'b000000000000000000000000000000000001???????????????????: diff_shift <= 35;
55'b0000000000000000000000000000000000001??????????????????: diff_shift <= 36;
55'b00000000000000000000000000000000000001?????????????????: diff_shift <= 37;
55'b000000000000000000000000000000000000001????????????????: diff_shift <= 38;
55'b0000000000000000000000000000000000000001???????????????: diff_shift <= 39;
55'b00000000000000000000000000000000000000001??????????????: diff_shift <= 40;
55'b000000000000000000000000000000000000000001?????????????: diff_shift <= 41;
55'b0000000000000000000000000000000000000000001????????????: diff_shift <= 42;
55'b00000000000000000000000000000000000000000001???????????: diff_shift <= 43;
55'b000000000000000000000000000000000000000000001??????????: diff_shift <= 44;
55'b0000000000000000000000000000000000000000000001?????????: diff_shift <= 45;
55'b00000000000000000000000000000000000000000000001????????: diff_shift <= 46;
55'b000000000000000000000000000000000000000000000001???????: diff_shift <= 47;
55'b0000000000000000000000000000000000000000000000001??????: diff_shift <= 48;
55'b00000000000000000000000000000000000000000000000001?????: diff_shift <= 49;
55'b000000000000000000000000000000000000000000000000001????: diff_shift <= 50;
55'b0000000000000000000000000000000000000000000000000001???: diff_shift <= 51;
55'b00000000000000000000000000000000000000000000000000001??: diff_shift <= 52;
55'b000000000000000000000000000000000000000000000000000001?: diff_shift <= 53;
55'b0000000000000000000000000000000000000000000000000000001: diff_shift <= 54;
55'b0000000000000000000000000000000000000000000000000000000: diff_shift <= 55;
endcase
 
/branches/avendor/fpu_mul.v
96,7 → 96,7
reg [105:0] product_4;
reg [105:0] product_5;
reg [105:0] product_6;
reg product_lsb;
reg product_lsb; // if there are any 1's in the remainder
wire [55:0] product_7 = { 1'b0, product_6[105:52], product_lsb };
reg [11:0] exponent_5;
 
162,8 → 162,8
exponent_b <= opb[62:52];
a_is_norm <= |exponent_a;
b_is_norm <= |exponent_b;
a_is_zero <= !(opa[62:0]);
b_is_zero <= !(opb[62:0]);
a_is_zero <= !(|opa[62:0]);
b_is_zero <= !(|opb[62:0]);
in_zero <= a_is_zero | b_is_zero;
exponent_terms <= exponent_a + exponent_b + !a_is_norm + !b_is_norm;
exponent_gt_expoffset <= exponent_terms > 1021;
205,67 → 205,69
product_6 <= exponent_et_zero ? product_5 >> 1 : product_5;
product_lsb <= |product_6[51:0];
exponent_5 <= in_zero ? 12'b0 : exponent_4;
product_shift_2 <= product_shift;
product_shift_2 <= product_shift; // redundant register
// reduces fanout on product_shift
end
end
 
always @(product)
casex(product)
106'b1?????????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 0;
106'b01????????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 1;
106'b001???????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 2;
106'b0001??????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 3;
106'b00001?????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 4;
106'b000001????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 5;
106'b0000001???????????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 6;
106'b00000001??????????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 7;
106'b000000001?????????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 8;
106'b0000000001????????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 9;
106'b00000000001???????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 10;
106'b000000000001??????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 11;
106'b0000000000001?????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 12;
106'b00000000000001????????????????????????????????????????????????????????????????????????????????????????????: product_shift = 13;
106'b000000000000001???????????????????????????????????????????????????????????????????????????????????????????: product_shift = 14;
106'b0000000000000001??????????????????????????????????????????????????????????????????????????????????????????: product_shift = 15;
106'b00000000000000001?????????????????????????????????????????????????????????????????????????????????????????: product_shift = 16;
106'b000000000000000001????????????????????????????????????????????????????????????????????????????????????????: product_shift = 17;
106'b0000000000000000001???????????????????????????????????????????????????????????????????????????????????????: product_shift = 18;
106'b00000000000000000001??????????????????????????????????????????????????????????????????????????????????????: product_shift = 19;
106'b000000000000000000001?????????????????????????????????????????????????????????????????????????????????????: product_shift = 20;
106'b0000000000000000000001????????????????????????????????????????????????????????????????????????????????????: product_shift = 21;
106'b00000000000000000000001???????????????????????????????????????????????????????????????????????????????????: product_shift = 22;
106'b000000000000000000000001??????????????????????????????????????????????????????????????????????????????????: product_shift = 23;
106'b0000000000000000000000001?????????????????????????????????????????????????????????????????????????????????: product_shift = 24;
106'b00000000000000000000000001????????????????????????????????????????????????????????????????????????????????: product_shift = 25;
106'b000000000000000000000000001???????????????????????????????????????????????????????????????????????????????: product_shift = 26;
106'b0000000000000000000000000001??????????????????????????????????????????????????????????????????????????????: product_shift = 27;
106'b00000000000000000000000000001?????????????????????????????????????????????????????????????????????????????: product_shift = 28;
106'b000000000000000000000000000001????????????????????????????????????????????????????????????????????????????: product_shift = 29;
106'b0000000000000000000000000000001???????????????????????????????????????????????????????????????????????????: product_shift = 30;
106'b00000000000000000000000000000001??????????????????????????????????????????????????????????????????????????: product_shift = 31;
106'b000000000000000000000000000000001?????????????????????????????????????????????????????????????????????????: product_shift = 32;
106'b0000000000000000000000000000000001????????????????????????????????????????????????????????????????????????: product_shift = 33;
106'b00000000000000000000000000000000001???????????????????????????????????????????????????????????????????????: product_shift = 34;
106'b000000000000000000000000000000000001??????????????????????????????????????????????????????????????????????: product_shift = 35;
106'b0000000000000000000000000000000000001?????????????????????????????????????????????????????????????????????: product_shift = 36;
106'b00000000000000000000000000000000000001????????????????????????????????????????????????????????????????????: product_shift = 37;
106'b000000000000000000000000000000000000001???????????????????????????????????????????????????????????????????: product_shift = 38;
106'b0000000000000000000000000000000000000001??????????????????????????????????????????????????????????????????: product_shift = 39;
106'b00000000000000000000000000000000000000001?????????????????????????????????????????????????????????????????: product_shift = 40;
106'b000000000000000000000000000000000000000001????????????????????????????????????????????????????????????????: product_shift = 41;
106'b0000000000000000000000000000000000000000001???????????????????????????????????????????????????????????????: product_shift = 42;
106'b00000000000000000000000000000000000000000001??????????????????????????????????????????????????????????????: product_shift = 43;
106'b000000000000000000000000000000000000000000001?????????????????????????????????????????????????????????????: product_shift = 44;
106'b0000000000000000000000000000000000000000000001????????????????????????????????????????????????????????????: product_shift = 45;
106'b00000000000000000000000000000000000000000000001???????????????????????????????????????????????????????????: product_shift = 46;
106'b000000000000000000000000000000000000000000000001??????????????????????????????????????????????????????????: product_shift = 47;
106'b0000000000000000000000000000000000000000000000001?????????????????????????????????????????????????????????: product_shift = 48;
106'b00000000000000000000000000000000000000000000000001????????????????????????????????????????????????????????: product_shift = 49;
106'b000000000000000000000000000000000000000000000000001???????????????????????????????????????????????????????: product_shift = 50;
106'b0000000000000000000000000000000000000000000000000001??????????????????????????????????????????????????????: product_shift = 51;
106'b00000000000000000000000000000000000000000000000000001?????????????????????????????????????????????????????: product_shift = 52;
106'b000000000000000000000000000000000000000000000000000000????????????????????????????????????????????????????: product_shift = 53;
106'b1?????????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 0;
106'b01????????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 1;
106'b001???????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 2;
106'b0001??????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 3;
106'b00001?????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 4;
106'b000001????????????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 5;
106'b0000001???????????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 6;
106'b00000001??????????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 7;
106'b000000001?????????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 8;
106'b0000000001????????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 9;
106'b00000000001???????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 10;
106'b000000000001??????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 11;
106'b0000000000001?????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 12;
106'b00000000000001????????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 13;
106'b000000000000001???????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 14;
106'b0000000000000001??????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 15;
106'b00000000000000001?????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 16;
106'b000000000000000001????????????????????????????????????????????????????????????????????????????????????????: product_shift <= 17;
106'b0000000000000000001???????????????????????????????????????????????????????????????????????????????????????: product_shift <= 18;
106'b00000000000000000001??????????????????????????????????????????????????????????????????????????????????????: product_shift <= 19;
106'b000000000000000000001?????????????????????????????????????????????????????????????????????????????????????: product_shift <= 20;
106'b0000000000000000000001????????????????????????????????????????????????????????????????????????????????????: product_shift <= 21;
106'b00000000000000000000001???????????????????????????????????????????????????????????????????????????????????: product_shift <= 22;
106'b000000000000000000000001??????????????????????????????????????????????????????????????????????????????????: product_shift <= 23;
106'b0000000000000000000000001?????????????????????????????????????????????????????????????????????????????????: product_shift <= 24;
106'b00000000000000000000000001????????????????????????????????????????????????????????????????????????????????: product_shift <= 25;
106'b000000000000000000000000001???????????????????????????????????????????????????????????????????????????????: product_shift <= 26;
106'b0000000000000000000000000001??????????????????????????????????????????????????????????????????????????????: product_shift <= 27;
106'b00000000000000000000000000001?????????????????????????????????????????????????????????????????????????????: product_shift <= 28;
106'b000000000000000000000000000001????????????????????????????????????????????????????????????????????????????: product_shift <= 29;
106'b0000000000000000000000000000001???????????????????????????????????????????????????????????????????????????: product_shift <= 30;
106'b00000000000000000000000000000001??????????????????????????????????????????????????????????????????????????: product_shift <= 31;
106'b000000000000000000000000000000001?????????????????????????????????????????????????????????????????????????: product_shift <= 32;
106'b0000000000000000000000000000000001????????????????????????????????????????????????????????????????????????: product_shift <= 33;
106'b00000000000000000000000000000000001???????????????????????????????????????????????????????????????????????: product_shift <= 34;
106'b000000000000000000000000000000000001??????????????????????????????????????????????????????????????????????: product_shift <= 35;
106'b0000000000000000000000000000000000001?????????????????????????????????????????????????????????????????????: product_shift <= 36;
106'b00000000000000000000000000000000000001????????????????????????????????????????????????????????????????????: product_shift <= 37;
106'b000000000000000000000000000000000000001???????????????????????????????????????????????????????????????????: product_shift <= 38;
106'b0000000000000000000000000000000000000001??????????????????????????????????????????????????????????????????: product_shift <= 39;
106'b00000000000000000000000000000000000000001?????????????????????????????????????????????????????????????????: product_shift <= 40;
106'b000000000000000000000000000000000000000001????????????????????????????????????????????????????????????????: product_shift <= 41;
106'b0000000000000000000000000000000000000000001???????????????????????????????????????????????????????????????: product_shift <= 42;
106'b00000000000000000000000000000000000000000001??????????????????????????????????????????????????????????????: product_shift <= 43;
106'b000000000000000000000000000000000000000000001?????????????????????????????????????????????????????????????: product_shift <= 44;
106'b0000000000000000000000000000000000000000000001????????????????????????????????????????????????????????????: product_shift <= 45;
106'b00000000000000000000000000000000000000000000001???????????????????????????????????????????????????????????: product_shift <= 46;
106'b000000000000000000000000000000000000000000000001??????????????????????????????????????????????????????????: product_shift <= 47;
106'b0000000000000000000000000000000000000000000000001?????????????????????????????????????????????????????????: product_shift <= 48;
106'b00000000000000000000000000000000000000000000000001????????????????????????????????????????????????????????: product_shift <= 49;
106'b000000000000000000000000000000000000000000000000001???????????????????????????????????????????????????????: product_shift <= 50;
106'b0000000000000000000000000000000000000000000000000001??????????????????????????????????????????????????????: product_shift <= 51;
106'b00000000000000000000000000000000000000000000000000001?????????????????????????????????????????????????????: product_shift <= 52;
106'b000000000000000000000000000000000000000000000000000000????????????????????????????????????????????????????: product_shift <= 53;
// It's not necessary to go past 53, because you will only get more than 53 zeros
// when multiplying 2 denormalized numbers together, in which case you will underflow
endcase
 
endmodule

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