// © IBM Corp. 2020
// Licensed under the Apache License, Version 2.0 (the "License"), as modified by
// the terms below; you may not use the files in this repository except in
// compliance with the License as modified.
// You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
//
// Modified Terms:
//
// 1) For the purpose of the patent license granted to you in Section 3 of the
// License, the "Work" hereby includes implementations of the work of authorship
// in physical form.
//
// 2) Notwithstanding any terms to the contrary in the License, any licenses
// necessary for implementation of the Work that are available from OpenPOWER
// via the Power ISA End User License Agreement (EULA) are explicitly excluded
// hereunder, and may be obtained from OpenPOWER under the terms and conditions
// of the EULA.
//
// Unless required by applicable law or agreed to in writing, the reference design
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
// for the specific language governing permissions and limitations under the License.
//
// Additional rights, including the ability to physically implement a softcore that
// is compliant with the required sections of the Power ISA Specification, are
// available at no cost under the terms of the OpenPOWER Power ISA EULA, which can be
// obtained (along with the Power ISA) here: https://openpowerfoundation.org.
`timescale 1 ns / 1 ns
// bias 127 0_0000_0111_1111
// bias 1023 0_0011_1111_1111 infinity=> 0_0111_1111_1111 2047
// bias 2047 0_0111_1111_1111 infinity=> 0_1111_1111_1111 4095
// bias 4095 0_1111_1111_1111 infinity=> 1_1111_1111_1111 8191
`include "tri_a2o.vh"
module fu_fmt(
vdd,
gnd,
clk,
rst,
clkoff_b,
act_dis,
flush,
delay_lclkr,
mpw1_b,
mpw2_b,
sg_1,
thold_1,
fpu_enable,
f_fmt_si,
f_fmt_so,
ex1_act,
ex2_act,
f_dcd_ex2_perr_force_c, // :in std_ulogic;
f_dcd_ex2_perr_fsel_ovrd, // :in std_ulogic;
f_pic_ex2_ftdiv, // :in std_ulogic;
f_fmt_ex3_be_den, // :out std_ulogic
f_byp_fmt_ex2_a_sign,
f_byp_fmt_ex2_c_sign,
f_byp_fmt_ex2_b_sign,
f_byp_fmt_ex2_a_expo,
f_byp_fmt_ex2_c_expo,
f_byp_fmt_ex2_b_expo,
f_byp_fmt_ex2_a_frac,
f_byp_fmt_ex2_c_frac,
f_byp_fmt_ex2_b_frac,
f_dcd_ex1_aop_valid,
f_dcd_ex1_cop_valid,
f_dcd_ex1_bop_valid,
f_dcd_ex1_from_integer_b,
f_dcd_ex1_fsel_b,
f_dcd_ex1_force_pass_b,
f_dcd_ex1_sp,
f_pic_ex2_flush_en_sp,
f_pic_ex2_flush_en_dp,
f_pic_ex2_nj_deni,
f_dcd_ex1_uc_end,
f_dcd_ex1_uc_mid,
f_dcd_ex1_uc_special,
f_dcd_ex1_sgncpy_b,
f_dcd_ex2_divsqrt_v,
f_fmt_ex3_lu_den_recip,
f_fmt_ex3_lu_den_rsqrto,
f_fmt_ex2_bop_byt,
f_fmt_ex2_a_zero,
f_fmt_ex2_a_zero_dsq,
f_fmt_ex2_a_expo_max,
f_fmt_ex2_a_expo_max_dsq,
f_fmt_ex2_a_frac_zero,
f_fmt_ex2_a_frac_msb,
f_fmt_ex2_c_zero,
f_fmt_ex2_c_expo_max,
f_fmt_ex2_c_frac_zero,
f_fmt_ex2_c_frac_msb,
f_fmt_ex2_b_zero,
f_fmt_ex2_b_zero_dsq,
f_fmt_ex2_b_expo_max,
f_fmt_ex2_b_expo_max_dsq,
f_fmt_ex2_b_frac_zero,
f_fmt_ex2_b_frac_msb,
f_fmt_ex2_b_imp,
f_fmt_ex2_b_frac_z32,
f_fmt_ex2_prod_zero,
f_fmt_ex2_pass_sel,
f_fmt_ex2_sp_invalid,
f_fmt_ex2_bexpu_le126,
f_fmt_ex2_gt126,
f_fmt_ex2_ge128,
f_fmt_ex2_inf_and_beyond_sp,
f_mad_ex3_uc_a_expo_den,
f_mad_ex3_uc_a_expo_den_sp,
f_ex3_b_den_flush,
f_fmt_ex3_fsel_bsel,
f_fmt_ex3_pass_sign,
f_fmt_ex3_pass_msb,
f_fmt_ex2_b_frac,
f_fmt_ex2_b_sign_gst,
f_fmt_ex2_b_expo_gst_b,
f_fmt_ex2_a_sign_div,
f_fmt_ex2_a_expo_div_b,
f_fmt_ex2_a_frac_div,
f_fmt_ex2_b_sign_div,
f_fmt_ex2_b_expo_div_b,
f_fmt_ex2_b_frac_div,
f_fpr_ex2_a_par,
f_fpr_ex2_c_par,
f_fpr_ex2_b_par,
f_mad_ex3_a_parity_check,
f_mad_ex3_c_parity_check,
f_mad_ex3_b_parity_check,
f_fmt_ex3_ae_ge_54,
f_fmt_ex3_be_ge_54,
f_fmt_ex3_be_ge_2,
f_fmt_ex3_be_ge_2044,
f_fmt_ex3_tdiv_rng_chk,
f_fmt_ex3_pass_frac
);
inout vdd;
inout gnd;
input clk;
input rst;
input clkoff_b; // tiup
input act_dis; // ??tidn??
input flush; // ??tidn??
input [1:2] delay_lclkr; // tidn,
input [1:2] mpw1_b; // tidn,
input [0:0] mpw2_b; // tidn,
input sg_1;
input thold_1;
input fpu_enable; //dc_act
input f_fmt_si; //perv
output f_fmt_so; //perv
input ex1_act;
input ex2_act;
input f_dcd_ex2_perr_force_c; // :in std_ulogic;
input f_dcd_ex2_perr_fsel_ovrd; // :in std_ulogic;
input f_pic_ex2_ftdiv; // :in std_ulogic;
output f_fmt_ex3_be_den; // :out std_ulogic
input f_byp_fmt_ex2_a_sign;
input f_byp_fmt_ex2_c_sign;
input f_byp_fmt_ex2_b_sign;
input [1:13] f_byp_fmt_ex2_a_expo;
input [1:13] f_byp_fmt_ex2_c_expo;
input [1:13] f_byp_fmt_ex2_b_expo;
input [0:52] f_byp_fmt_ex2_a_frac;
input [0:52] f_byp_fmt_ex2_c_frac;
input [0:52] f_byp_fmt_ex2_b_frac;
input f_dcd_ex1_aop_valid;
input f_dcd_ex1_cop_valid;
input f_dcd_ex1_bop_valid;
input f_dcd_ex1_from_integer_b; //no NAN
input f_dcd_ex1_fsel_b; //modify nan mux
input f_dcd_ex1_force_pass_b; //force select of nan mux (fmr)
input f_dcd_ex1_sp;
input f_pic_ex2_flush_en_sp;
input f_pic_ex2_flush_en_dp;
input f_pic_ex2_nj_deni;
input f_dcd_ex1_uc_end;
input f_dcd_ex1_uc_mid;
input f_dcd_ex1_uc_special;
input f_dcd_ex1_sgncpy_b;
input f_dcd_ex2_divsqrt_v;
output f_fmt_ex3_lu_den_recip; //pic
output f_fmt_ex3_lu_den_rsqrto; //pic
output [45:52] f_fmt_ex2_bop_byt; // shadow reg
output f_fmt_ex2_a_zero; //pic
output f_fmt_ex2_a_zero_dsq; //pic
output f_fmt_ex2_a_expo_max; //pic
output f_fmt_ex2_a_expo_max_dsq; //pic
output f_fmt_ex2_a_frac_zero; //pic
output f_fmt_ex2_a_frac_msb; //pic
output f_fmt_ex2_c_zero; //pic
output f_fmt_ex2_c_expo_max; //pic
output f_fmt_ex2_c_frac_zero; //pic
output f_fmt_ex2_c_frac_msb; //pic
output f_fmt_ex2_b_zero; //pic
output f_fmt_ex2_b_zero_dsq; //pic
output f_fmt_ex2_b_expo_max; //pic
output f_fmt_ex2_b_expo_max_dsq; //pic
output f_fmt_ex2_b_frac_zero; //pic
output f_fmt_ex2_b_frac_msb; //pic
output f_fmt_ex2_b_imp; //pic--
output f_fmt_ex2_b_frac_z32; //pic--
output f_fmt_ex2_prod_zero; //alg
output f_fmt_ex2_pass_sel; //alg
output f_fmt_ex2_sp_invalid; //pic
output f_fmt_ex2_bexpu_le126; //pic
output f_fmt_ex2_gt126; //pic
output f_fmt_ex2_ge128; //pic
output f_fmt_ex2_inf_and_beyond_sp; //pic
output f_mad_ex3_uc_a_expo_den; //dvSq input operand is already prenormed
output f_mad_ex3_uc_a_expo_den_sp; //dvSq input operand is already prenormed
//exponent negative or all zeroes
output f_ex3_b_den_flush; //iu (does not include all gating) ???
output f_fmt_ex3_fsel_bsel; //pic--expo
output f_fmt_ex3_pass_sign; //alg
output f_fmt_ex3_pass_msb; //alg
output [1:19] f_fmt_ex2_b_frac; //clz (est)
output f_fmt_ex2_b_sign_gst;
output [1:13] f_fmt_ex2_b_expo_gst_b;
output f_fmt_ex2_a_sign_div;
output [01:13] f_fmt_ex2_a_expo_div_b;
output [01:52] f_fmt_ex2_a_frac_div;
output f_fmt_ex2_b_sign_div;
output [01:13] f_fmt_ex2_b_expo_div_b;
output [01:52] f_fmt_ex2_b_frac_div;
input [0:7] f_fpr_ex2_a_par;
input [0:7] f_fpr_ex2_c_par;
input [0:7] f_fpr_ex2_b_par;
output f_mad_ex3_a_parity_check; // raw calculation
output f_mad_ex3_c_parity_check; // raw calculation
output f_mad_ex3_b_parity_check; // raw calculation
output f_fmt_ex3_ae_ge_54; //unbiased exponent not LE -970
output f_fmt_ex3_be_ge_54; //unbiased exponent not LE -970
output f_fmt_ex3_be_ge_2; //unbiased exponent not le 1
output f_fmt_ex3_be_ge_2044; //unbiased exponent ge 1023
output f_fmt_ex3_tdiv_rng_chk; //unbiased exponent ae-be >= 1023, <= -1021
output [0:52] f_fmt_ex3_pass_frac; //alg
// ENTITY
parameter tiup = 1'b1;
parameter tidn = 1'b0;
wire thold_0_b;
wire thold_0;
wire force_t;
wire sg_0;
(* analysis_not_referenced="TRUE" *)
wire [0:3] spare_unused;
//--------------------------------------
wire [0:6] act_si; //SCAN
wire [0:6] act_so; //SCAN
wire [0:8] ex2_ctl_si; //SCAN
wire [0:8] ex2_ctl_so; //SCAN
wire [0:79] ex3_pass_si; //SCAN
wire [0:79] ex3_pass_so; //SCAN
//--------------------------------------
wire [0:52] ex3_pass_frac;
wire ex2_from_integer;
wire ex2_fsel;
wire ex2_force_pass;
wire ex2_a_sign;
wire ex2_c_sign;
wire ex2_b_sign;
wire ex3_fsel_bsel;
wire ex3_pass_sign;
//--------------------------------------
wire [0:52] ex2_a_frac;
wire [0:52] ex2_c_frac;
wire [0:52] ex2_b_frac;
wire [0:52] ex2_pass_frac_ac;
wire [0:52] ex2_pass_frac;
wire ex2_a_frac_msb;
wire ex2_a_expo_min;
wire ex2_a_expo_max;
wire ex2_a_expo_max_dsq;
wire ex2_a_frac_zero;
wire ex2_c_frac_msb;
wire ex2_c_expo_min;
wire ex2_c_expo_max;
wire ex2_c_frac_zero;
wire ex2_b_frac_msb;
wire ex2_b_expo_min;
wire ex2_b_expo_max;
wire ex2_b_expo_max_dsq;
wire ex2_b_frac_zero;
wire ex2_b_frac_z32;
wire ex2_a_nan;
wire ex2_c_nan;
wire ex2_b_nan;
wire ex2_nan_pass;
wire ex2_pass_sel;
wire ex2_fsel_cif;
wire ex2_fsel_bsel;
wire ex2_mux_a_sel;
wire ex2_mux_c_sel;
wire ex2_pass_sign_ac;
wire ex2_pass_sign;
wire [1:13] ex2_a_expo;
wire [1:13] ex2_b_expo;
wire [1:13] ex2_c_expo;
wire [1:13] ex2_a_expo_b;
wire [1:13] ex2_c_expo_b;
wire [1:13] ex2_b_expo_b;
wire ex1_aop_valid_b;
wire ex1_cop_valid_b;
wire ex1_bop_valid_b;
wire ex2_aop_valid;
wire ex2_cop_valid;
wire ex2_bop_valid;
wire ex2_a_zero;
wire ex2_c_zero;
wire ex2_b_zero;
wire ex2_a_zero_x;
wire ex2_c_zero_x;
wire ex2_b_zero_x;
wire ex2_a_sp_expo_ok_1;
wire ex2_c_sp_expo_ok_1;
wire ex2_b_sp_expo_ok_1;
wire ex2_a_sp_expo_ok_2;
wire ex2_c_sp_expo_ok_2;
wire ex2_b_sp_expo_ok_2;
wire ex2_a_sp_expo_ok_3;
wire ex2_c_sp_expo_ok_3;
wire ex2_b_sp_expo_ok_3;
wire ex2_a_sp_expo_ok_4;
wire ex2_c_sp_expo_ok_4;
wire ex2_b_sp_expo_ok_4;
wire [0:52] ex3_pass_dp;
wire ex2_from_integer_b;
wire ex2_fsel_b;
wire ex2_aop_valid_b;
wire ex2_cop_valid_b;
wire ex2_bop_valid_b;
wire ex2_b_den_flush;
wire ex2_b_den_sp;
wire ex2_b_den_dp;
wire ex2_a_den_sp;
wire ex2_be_den;
wire ex3_be_den;
wire ex3_b_den_flush;
wire ex2_a_den_flush;
wire ex2_a_den_sp_ftdiv;
wire ex2_a_den_dp;
wire ex2_lu_den_part;
wire ex2_lu_den_recip;
wire ex2_lu_den_rsqrto;
wire ex3_lu_den_recip;
wire ex3_lu_den_rsqrto;
wire ex2_recip_lo;
wire ex2_rsqrt_lo;
wire ex2_bfrac_eq_126;
wire ex2_bfrac_126_nz;
wire ex2_bexpo_ge897_hi;
wire ex2_bexpo_ge897_mid1;
wire ex2_bexpo_ge897_mid2;
wire ex2_bexpo_ge897_lo;
wire ex2_bexpo_ge897;
wire ex2_bexpu_eq6;
wire ex2_bexpu_ge7;
wire ex2_bexpu_ge7_lo;
wire ex2_bexpu_ge7_mid;
wire ex2_a_sp;
wire ex2_c_sp;
wire ex2_b_sp;
wire ex2_b_frac_zero_sp;
wire ex2_b_frac_zero_dp;
wire ex2_a_denz;
wire ex2_c_denz;
wire ex2_b_denz;
wire [0:52] ex2_a_frac_chop;
wire [0:52] ex2_c_frac_chop;
wire [0:52] ex2_b_frac_chop;
wire ex1_sgncpy;
wire ex2_sgncpy;
wire ex2_uc_mid;
wire ex1_force_pass;
wire ex1_uc_end_nspec;
wire ex1_uc_end_spec;
wire ex2_uc_end_nspec;
wire ex2_uc_a_expo_den;
wire ex3_uc_a_expo_den;
wire ex2_uc_a_expo_den_sp;
wire ex3_uc_a_expo_den_sp;
wire ex2_a_expo_ltx381_sp;
wire ex2_a_expo_ltx381;
wire ex2_a_expo_00xx_xxxx_xxxx;
wire ex2_a_expo_xx11_1xxx_xxxx;
wire ex2_a_expo_xxxx_x000_0000;
wire ex2_c_expo_ltx381_sp;
wire ex2_c_expo_ltx381;
wire ex2_c_expo_00xx_xxxx_xxxx;
wire ex2_c_expo_xx11_1xxx_xxxx;
wire ex2_c_expo_xxxx_x000_0000;
wire ex2_b_expo_ltx381_sp;
wire ex2_b_expo_ltx381;
wire ex2_b_expo_00xx_xxxx_xxxx;
wire ex2_b_expo_xx11_1xxx_xxxx;
wire ex2_b_expo_xxxx_x000_0000;
wire ex2_a_expo_ltx36A_sp;
wire ex2_b_expo_ltx36A_sp;
wire ex2_a_sp_inf_alias_tail;
wire ex2_c_sp_inf_alias_tail;
wire ex2_b_sp_inf_alias_tail;
wire ex3_a_party_chick;
wire ex3_c_party_chick;
wire ex3_b_party_chick;
wire ex2_a_party_chick;
wire ex2_c_party_chick;
wire ex2_b_party_chick;
wire [0:7] ex2_a_party;
wire [0:7] ex2_c_party;
wire [0:7] ex2_b_party;
wire ex2_b_expo_ge1151;
wire ex2_ae_234567;
wire ex2_ae_89;
wire ex2_ae_abc;
wire ex2_ae_ge_54;
wire ex3_ae_ge_54;
wire ex2_be_234567;
wire ex2_be_89;
wire ex2_be_abc;
wire ex2_be_ge_54;
wire ex3_be_ge_54;
wire ex2_be_ge_2;
wire ex3_be_ge_2;
wire ex2_be_or_23456789abc;
wire ex2_be_ge_2044;
wire ex3_be_ge_2044;
wire ex2_be_and_3456789ab;
wire [0:12] ex2_aembex_car_b;
wire [0:12] ex2_aembey_car_b;
wire [1:13] ex2_aembex_sum_b;
wire [1:13] ex2_aembey_sum_b;
wire [2:12] ex2_aembex_g1;
wire [2:12] ex2_aembey_g1;
wire [2:12] ex2_aembex_t1;
wire [2:12] ex2_aembey_t1;
wire [0:5] ex2_aembex_g2;
wire [0:5] ex2_aembey_g2;
wire [0:4] ex2_aembex_t2;
wire [0:4] ex2_aembey_t2;
wire [0:2] ex2_aembex_g4;
wire [0:2] ex2_aembey_g4;
wire [0:1] ex2_aembex_t4;
wire [0:1] ex2_aembey_t4;
wire [0:2] ex3_aembex_g4;
wire [0:2] ex3_aembey_g4;
wire [0:1] ex3_aembex_t4;
wire [0:1] ex3_aembey_t4;
wire [0:1] ex3_aembex_g8;
wire [0:1] ex3_aembey_g8;
wire [0:0] ex3_aembex_t8;
wire [0:0] ex3_aembey_t8;
wire ex3_aembex_c2;
wire ex3_aembey_c2;
wire ex2_aembex_sgn;
wire ex2_aembey_sgn;
wire ex3_aembex_sgn;
wire ex3_aembey_sgn;
wire ex3_aembex_res_sgn;
wire ex3_aembey_res_sgn;
(* analysis_not_referenced="TRUE" *) // unused
wire unused;
wire ex2_divsqrt;
//#=##############################################################
//# map block attributes
//#=##############################################################
assign unused = ex2_aembex_car_b[0] | ex2_aembex_sum_b[13] | ex2_aembex_t1[12] | ex2_aembey_car_b[0] | ex2_aembey_sum_b[13] | ex2_aembey_t1[12];
//#=##############################################################
//# pervasive
//#=##############################################################
tri_plat thold_reg_0(
.vd(vdd),
.gd(gnd),
.clk(clk),
.rst(rst),
.flush(flush),
.din(thold_1),
.q(thold_0)
);
tri_plat sg_reg_0(
.vd(vdd),
.gd(gnd),
.clk(clk),
.rst(rst),
.flush(flush),
.din(sg_1),
.q(sg_0)
);
tri_lcbor lcbor_0(
.clkoff_b(clkoff_b),
.thold(thold_0),
.sg(sg_0),
.act_dis(act_dis),
.force_t(force_t),
.thold_b(thold_0_b)
);
//#=##############################################################
//# act
//#=##############################################################
tri_rlmreg_p #(.WIDTH(7), .NEEDS_SRESET(0)) act_lat(
.force_t(force_t), //i-- tidn,
.d_mode(tiup),
.delay_lclkr(delay_lclkr[1]), //i-- tidn,
.mpw1_b(mpw1_b[1]), //i-- tidn,
.mpw2_b(mpw2_b[0]), //i-- tidn,
.vd(vdd),
.gd(gnd),
.clk(clk),
.rst(rst),
.act(fpu_enable),
.thold_b(thold_0_b),
.sg(sg_0),
.scout(act_so),
.scin(act_si),
//-----------------
.din({ spare_unused[0],
spare_unused[1],
f_dcd_ex1_sp,
f_dcd_ex1_sp,
f_dcd_ex1_sp,
spare_unused[2],
spare_unused[3]}),
//-----------------
.dout({ spare_unused[0],
spare_unused[1],
ex2_a_sp,
ex2_c_sp,
ex2_b_sp,
spare_unused[2],
spare_unused[3]})
);
//#=##############################################################
//# ex1 logic (after bypass)
//#=##############################################################
assign ex1_aop_valid_b = (~f_dcd_ex1_aop_valid);
assign ex1_cop_valid_b = (~f_dcd_ex1_cop_valid);
assign ex1_bop_valid_b = (~f_dcd_ex1_bop_valid);
//#=##############################################################
//# ex2 latches (from ex1 logic)
//#=##############################################################
assign ex2_a_frac[0:52] = f_byp_fmt_ex2_a_frac[0:52];
assign ex2_c_frac[0:52] = f_byp_fmt_ex2_c_frac[0:52];
assign ex2_b_frac[0:52] = f_byp_fmt_ex2_b_frac[0:52];
assign ex2_a_sign = f_byp_fmt_ex2_a_sign; //rename--
assign ex2_c_sign = f_byp_fmt_ex2_c_sign; //rename--
assign ex2_b_sign = f_byp_fmt_ex2_b_sign; //rename--
assign ex2_a_expo[1:13] = f_byp_fmt_ex2_a_expo[1:13]; //rename--
assign ex2_c_expo[1:13] = f_byp_fmt_ex2_c_expo[1:13]; //rename--
assign ex2_b_expo[1:13] = f_byp_fmt_ex2_b_expo[1:13]; //rename--
assign ex2_a_expo_b[1:13] = (~ex2_a_expo[1:13]);
assign ex2_c_expo_b[1:13] = (~ex2_c_expo[1:13]);
assign ex2_b_expo_b[1:13] = (~ex2_b_expo[1:13]);
assign f_fmt_ex2_b_sign_gst = ex2_b_sign;
assign ex1_sgncpy = (~f_dcd_ex1_sgncpy_b);
assign ex1_uc_end_nspec = f_dcd_ex1_uc_end & (~f_dcd_ex1_uc_special);
assign ex1_uc_end_spec = f_dcd_ex1_uc_end & f_dcd_ex1_uc_special;
assign ex1_force_pass = ((~f_dcd_ex1_force_pass_b)) | ex1_uc_end_spec;
tri_rlmreg_p #(.WIDTH(9), .NEEDS_SRESET(0)) ex2_ctl_lat(
.force_t(force_t), //i-- tidn,
.d_mode(tiup),
.delay_lclkr(delay_lclkr[1]), //i-- tidn,
.mpw1_b(mpw1_b[1]), //i-- tidn,
.mpw2_b(mpw2_b[0]), //i-- tidn,
.vd(vdd),
.gd(gnd),
.clk(clk),
.rst(rst),
.act(ex1_act),
.thold_b(thold_0_b),
.sg(sg_0),
.scout(ex2_ctl_so),
.scin(ex2_ctl_si),
//-----------------
.din({ f_dcd_ex1_from_integer_b,
f_dcd_ex1_fsel_b,
ex1_force_pass,
ex1_aop_valid_b,
ex1_cop_valid_b,
ex1_bop_valid_b,
ex1_sgncpy,
ex1_uc_end_nspec,
f_dcd_ex1_uc_mid}),
//-----------------
.dout({ ex2_from_integer_b,
ex2_fsel_b,
ex2_force_pass,
ex2_aop_valid_b,
ex2_cop_valid_b,
ex2_bop_valid_b,
ex2_sgncpy,
ex2_uc_end_nspec,
ex2_uc_mid})
);
assign ex2_from_integer = (~ex2_from_integer_b);
assign ex2_fsel = (~ex2_fsel_b);
assign ex2_aop_valid = (~ex2_aop_valid_b);
assign ex2_cop_valid = (~ex2_cop_valid_b);
assign ex2_bop_valid = (~ex2_bop_valid_b);
//#=##############################################################
//# ex2 logic
//#=##############################################################
assign f_fmt_ex2_bop_byt[45:52] = ex2_b_frac[45:52]; //output-- -- shadow reg
//#=-----------------------------------------------------------------
//#= Boundary conditions for log2e/pow2e special cases
//#=-----------------------------------------------------------------
//#= exponent Lt 2**-126 <unbiased> ... -126 +1023 = 897 (sp denorms) x 0_0011_1000_0001
//#= number less than -126 (2**6) <64>.<32><16>(8><4><2>
//#= x0_0011_1111_1111 bias = 1023
//#= x0_0000_0000_0110 unbiased
//#= -----------------
//#= x0_0100_0000_0101 biased 6
assign f_fmt_ex2_b_expo_gst_b[1:13] = (~ex2_b_expo[1:13]);
// positive exponent
assign ex2_bexpo_ge897_hi = (~ex2_b_expo[1]) & ex2_b_frac[0]; // must be normalized (897 includes sp denorms)
assign ex2_bexpo_ge897_mid1 = ex2_b_expo[2] | ex2_b_expo[3];
assign ex2_bexpo_ge897_mid2 = ex2_b_expo[4] & ex2_b_expo[5] & ex2_b_expo[6];
assign ex2_bexpo_ge897_lo = ex2_b_expo[7] | ex2_b_expo[8] | ex2_b_expo[9] | ex2_b_expo[10] | ex2_b_expo[11] | ex2_b_expo[12] | ex2_b_expo[13];
assign ex2_bexpo_ge897 = (ex2_bexpo_ge897_hi & ex2_bexpo_ge897_mid1) | (ex2_bexpo_ge897_hi & ex2_bexpo_ge897_mid2 & ex2_bexpo_ge897_lo);
assign ex2_bexpu_ge7_mid = ex2_b_expo[4] | ex2_b_expo[5] | ex2_b_expo[6] | ex2_b_expo[7] | ex2_b_expo[8] | ex2_b_expo[9] | ex2_b_expo[10];
assign ex2_bexpu_ge7_lo = ex2_b_expo[11] & ex2_b_expo[12];
assign ex2_bexpu_ge7 = ((~ex2_b_expo[1]) & ex2_b_expo[2]) | ((~ex2_b_expo[1]) & ex2_b_expo[3] & ex2_bexpu_ge7_mid) | ((~ex2_b_expo[1]) & ex2_b_expo[3] & ex2_bexpu_ge7_lo);
// 0_0100_0000_0101 1023+6 - 1024+5
// +expo
// 2048
// 1024
// 512
// 256
// 128
// 64
// 32
// 16
// 8
// 4
assign ex2_bexpu_eq6 = (~ex2_b_expo[1]) & (~ex2_b_expo[2]) & ex2_b_expo[3] & (~ex2_b_expo[4]) & (~ex2_b_expo[5]) & (~ex2_b_expo[6]) & (~ex2_b_expo[7]) & (~ex2_b_expo[8]) & (~ex2_b_expo[9]) & (~ex2_b_expo[10]) & ex2_b_expo[11] & (~ex2_b_expo[12]) & ex2_b_expo[13]; // 2
// 1
assign f_fmt_ex2_bexpu_le126 = (~ex2_bexpo_ge897); //output--
assign f_fmt_ex2_gt126 = ex2_bexpu_ge7 | (ex2_bexpu_eq6 & ex2_bfrac_eq_126 & ex2_bfrac_126_nz); //output--
assign f_fmt_ex2_ge128 = ex2_bexpu_ge7; //output--
// exponent >= 1023 + 128 = 1151 (1024+127)
// 1 2345 6789 abcd
// 0_0100_0111 _1111 <-- 1151 aliases to sp infinity/nan range
// 0_1xxx_xxxx_xxxx
// 0_x11x_xxxx_xxxx
// 0_x1x1_xxxx_xxxx
// 0_x1xx_1xxx_xxxx
assign ex2_b_expo_ge1151 = (ex2_b_expo_b[1] & (~ex2_b_expo_b[2])) | (ex2_b_expo_b[1] & (~ex2_b_expo_b[3]) & (~ex2_b_expo_b[4])) | (ex2_b_expo_b[1] & (~ex2_b_expo_b[3]) & (~ex2_b_expo_b[5])) | (ex2_b_expo_b[1] & (~ex2_b_expo_b[3]) & (~ex2_b_expo_b[6])) | (ex2_b_expo_b[1] & (~ex2_b_expo_b[3]) & (~ex2_b_expo_b[7]) & (~ex2_b_expo_b[8]) & (~ex2_b_expo_b[9]) & (~ex2_b_expo_b[10]) & (~ex2_b_expo_b[11]) & (~ex2_b_expo_b[12]) & (~ex2_b_expo_b[13])); // 0_x1xx_x111_1111
assign f_fmt_ex2_inf_and_beyond_sp = ex2_b_expo_max | ex2_b_expo_ge1151;
//64
//32
//16
// 8
assign ex2_bfrac_eq_126 = ex2_b_frac[0] & ex2_b_frac[1] & ex2_b_frac[2] & ex2_b_frac[3] & ex2_b_frac[4] & ex2_b_frac[5]; // 4
// 2
// ex2_b_frac(6) ; -- 1
assign ex2_bfrac_126_nz = ex2_b_frac[6] | ex2_b_frac[7] | ex2_b_frac[8] | ex2_b_frac[9] | ex2_b_frac[10] | ex2_b_frac[11] | ex2_b_frac[12] | ex2_b_frac[13] | ex2_b_frac[14] | ex2_b_frac[15] | ex2_b_frac[16] | ex2_b_frac[17] | ex2_b_frac[18] | ex2_b_frac[19] | ex2_b_frac[20] | ex2_b_frac[21] | ex2_b_frac[22] | ex2_b_frac[23];
//#=--------------------------------------------------
//#= all1/all0 determination
//#=--------------------------------------------------
assign ex2_a_frac_msb = ex2_a_frac[1];
assign ex2_c_frac_msb = ex2_c_frac[1];
assign ex2_b_frac_msb = ex2_b_frac[1];
assign ex2_a_expo_min = (~ex2_a_frac[0]); // implicit bit off
assign ex2_c_expo_min = (~ex2_c_frac[0]);
assign ex2_b_expo_min = (~ex2_b_frac[0]);
assign ex2_a_expo_max = ex2_a_expo_b[1] & ex2_a_expo_b[2] & (~ex2_a_expo_b[3]) & (~ex2_a_expo_b[4]) & (~ex2_a_expo_b[5]) & (~ex2_a_expo_b[6]) & (~ex2_a_expo_b[7]) & (~ex2_a_expo_b[8]) & (~ex2_a_expo_b[9]) & (~ex2_a_expo_b[10]) & (~ex2_a_expo_b[11]) & (~ex2_a_expo_b[12]) & (~ex2_a_expo_b[13]);
assign ex2_c_expo_max = ex2_c_expo_b[1] & ex2_c_expo_b[2] & (~ex2_c_expo_b[3]) & (~ex2_c_expo_b[4]) & (~ex2_c_expo_b[5]) & (~ex2_c_expo_b[6]) & (~ex2_c_expo_b[7]) & (~ex2_c_expo_b[8]) & (~ex2_c_expo_b[9]) & (~ex2_c_expo_b[10]) & (~ex2_c_expo_b[11]) & (~ex2_c_expo_b[12]) & (~ex2_c_expo_b[13]);
assign ex2_b_expo_max = ex2_b_expo_b[1] & ex2_b_expo_b[2] & (~ex2_b_expo_b[3]) & (~ex2_b_expo_b[4]) & (~ex2_b_expo_b[5]) & (~ex2_b_expo_b[6]) & (~ex2_b_expo_b[7]) & (~ex2_b_expo_b[8]) & (~ex2_b_expo_b[9]) & (~ex2_b_expo_b[10]) & (~ex2_b_expo_b[11]) & (~ex2_b_expo_b[12]) & (~ex2_b_expo_b[13]);
// ex2_a_frac( 0) or
assign ex2_a_frac_zero = (~ex2_a_frac[1]) & (~ex2_a_frac[2]) & (~ex2_a_frac[3]) & (~ex2_a_frac[4]) & (~ex2_a_frac[5]) & (~ex2_a_frac[6]) & (~ex2_a_frac[7]) & (~ex2_a_frac[8]) & (~ex2_a_frac[9]) & (~ex2_a_frac[10]) & (~ex2_a_frac[11]) & (~ex2_a_frac[12]) & (~ex2_a_frac[13]) & (~ex2_a_frac[14]) & (~ex2_a_frac[15]) & (~ex2_a_frac[16]) & (~ex2_a_frac[17]) & (~ex2_a_frac[18]) & (~ex2_a_frac[19]) & (~ex2_a_frac[20]) & (~ex2_a_frac[21]) & (~ex2_a_frac[22]) & (~ex2_a_frac[23]) & (~ex2_a_frac[24]) & (~ex2_a_frac[25]) & (~ex2_a_frac[26]) & (~ex2_a_frac[27]) & (~ex2_a_frac[28]) & (~ex2_a_frac[29]) & (~ex2_a_frac[30]) & (~ex2_a_frac[31]) & (~ex2_a_frac[32]) & (~ex2_a_frac[33]) & (~ex2_a_frac[34]) & (~ex2_a_frac[35]) & (~ex2_a_frac[36]) & (~ex2_a_frac[37]) & (~ex2_a_frac[38]) & (~ex2_a_frac[39]) & (~ex2_a_frac[40]) & (~ex2_a_frac[41]) & (~ex2_a_frac[42]) & (~ex2_a_frac[43]) & (~ex2_a_frac[44]) & (~ex2_a_frac[45]) & (~ex2_a_frac[46]) & (~ex2_a_frac[47]) & (~ex2_a_frac[48]) & (~ex2_a_frac[49]) & (~ex2_a_frac[50]) & (~ex2_a_frac[51]) & (~ex2_a_frac[52]); // (ex2_a_frac_zero_dp or ex2_a_sp ); ex2_a_frac_zero_dp <=
// ex2_c_frac( 0) and
assign ex2_c_frac_zero = (~ex2_c_frac[1]) & (~ex2_c_frac[2]) & (~ex2_c_frac[3]) & (~ex2_c_frac[4]) & (~ex2_c_frac[5]) & (~ex2_c_frac[6]) & (~ex2_c_frac[7]) & (~ex2_c_frac[8]) & (~ex2_c_frac[9]) & (~ex2_c_frac[10]) & (~ex2_c_frac[11]) & (~ex2_c_frac[12]) & (~ex2_c_frac[13]) & (~ex2_c_frac[14]) & (~ex2_c_frac[15]) & (~ex2_c_frac[16]) & (~ex2_c_frac[17]) & (~ex2_c_frac[18]) & (~ex2_c_frac[19]) & (~ex2_c_frac[20]) & (~ex2_c_frac[21]) & (~ex2_c_frac[22]) & (~ex2_c_frac[23]) & (~ex2_c_frac[24]) & (~ex2_c_frac[25]) & (~ex2_c_frac[26]) & (~ex2_c_frac[27]) & (~ex2_c_frac[28]) & (~ex2_c_frac[29]) & (~ex2_c_frac[30]) & (~ex2_c_frac[31]) & (~ex2_c_frac[32]) & (~ex2_c_frac[33]) & (~ex2_c_frac[34]) & (~ex2_c_frac[35]) & (~ex2_c_frac[36]) & (~ex2_c_frac[37]) & (~ex2_c_frac[38]) & (~ex2_c_frac[39]) & (~ex2_c_frac[40]) & (~ex2_c_frac[41]) & (~ex2_c_frac[42]) & (~ex2_c_frac[43]) & (~ex2_c_frac[44]) & (~ex2_c_frac[45]) & (~ex2_c_frac[46]) & (~ex2_c_frac[47]) & (~ex2_c_frac[48]) & (~ex2_c_frac[49]) & (~ex2_c_frac[50]) & (~ex2_c_frac[51]) & (~ex2_c_frac[52]); //( ex2_c_frac_zero_dp or ex2_c_sp ); ex2_c_frac_zero_dp <=
assign ex2_b_frac_zero_sp = (~ex2_b_frac[1]) & (~ex2_b_frac[2]) & (~ex2_b_frac[3]) & (~ex2_b_frac[4]) & (~ex2_b_frac[5]) & (~ex2_b_frac[6]) & (~ex2_b_frac[7]) & (~ex2_b_frac[8]) & (~ex2_b_frac[9]) & (~ex2_b_frac[10]) & (~ex2_b_frac[11]) & (~ex2_b_frac[12]) & (~ex2_b_frac[13]) & (~ex2_b_frac[14]) & (~ex2_b_frac[15]) & (~ex2_b_frac[16]) & (~ex2_b_frac[17]) & (~ex2_b_frac[18]) & (~ex2_b_frac[19]) & (~ex2_b_frac[20]) & (~ex2_b_frac[21]) & (~ex2_b_frac[22]) & (~ex2_b_frac[23]);
//SP/UNDEF ex2_b_frac_zero <= ex2_b_frac_zero_sp and ( ex2_b_sp or ex2_b_frac_zero_dp );
assign ex2_b_frac_zero = ex2_b_frac_zero_sp & ex2_b_frac_zero_dp;
assign ex2_b_frac_z32 = (~ex2_b_frac[24]) & (~ex2_b_frac[25]) & (~ex2_b_frac[26]) & (~ex2_b_frac[27]) & (~ex2_b_frac[28]) & (~ex2_b_frac[29]) & (~ex2_b_frac[30]) & (~ex2_b_frac[31]); // ex2_b_frac( 0) and
assign f_fmt_ex2_b_frac_z32 = ex2_b_frac_zero_sp & ex2_b_frac_z32; //output (for to_int_word special cases)
assign ex2_b_frac_zero_dp = ex2_b_frac_z32 & (~ex2_b_frac[32]) & (~ex2_b_frac[33]) & (~ex2_b_frac[34]) & (~ex2_b_frac[35]) & (~ex2_b_frac[36]) & (~ex2_b_frac[37]) & (~ex2_b_frac[38]) & (~ex2_b_frac[39]) & (~ex2_b_frac[40]) & (~ex2_b_frac[41]) & (~ex2_b_frac[42]) & (~ex2_b_frac[43]) & (~ex2_b_frac[44]) & (~ex2_b_frac[45]) & (~ex2_b_frac[46]) & (~ex2_b_frac[47]) & (~ex2_b_frac[48]) & (~ex2_b_frac[49]) & (~ex2_b_frac[50]) & (~ex2_b_frac[51]) & (~ex2_b_frac[52]);
assign f_fmt_ex2_b_frac[1:19] = ex2_b_frac[1:19]; //output-- to tables
assign f_fmt_ex2_a_sign_div = ex2_a_sign;
assign f_fmt_ex2_a_expo_div_b = (~ex2_a_expo[1:13]);
assign f_fmt_ex2_a_frac_div = ex2_a_frac[1:52];
assign f_fmt_ex2_b_sign_div = ex2_b_sign;
assign f_fmt_ex2_b_expo_div_b = (~ex2_b_expo[1:13]);
assign f_fmt_ex2_b_frac_div = ex2_b_frac[1:52];
assign ex2_a_denz = ((~ex2_a_frac[0]) | ex2_a_expo_ltx381_sp) & f_pic_ex2_nj_deni; // also true after prenorm
assign ex2_c_denz = ((~ex2_c_frac[0]) | ex2_c_expo_ltx381_sp) & f_pic_ex2_nj_deni; // also true after prenorm
assign ex2_b_denz = ((~ex2_b_frac[0]) | ex2_b_expo_ltx381_sp) & f_pic_ex2_nj_deni & (~ex2_from_integer); // also true after prenorm
assign ex2_a_zero_x = (ex2_a_denz | (ex2_a_expo_min & ex2_a_frac_zero));
assign ex2_c_zero_x = (ex2_c_denz | (ex2_c_expo_min & ex2_c_frac_zero));
assign ex2_b_zero_x = (ex2_b_denz | (ex2_b_expo_min & ex2_b_frac_zero)) & ((~ex2_from_integer) | (~ex2_b_sign));
// from integer only does prenorm on SP denorm (exponent=x381)
assign ex2_divsqrt = f_dcd_ex2_divsqrt_v;
assign ex2_b_den_flush = ex2_b_den_sp | ex2_b_den_dp | ex2_a_den_sp_ftdiv | (ex2_divsqrt & (ex2_a_den_dp | ex2_a_den_sp));
assign ex2_a_den_sp_ftdiv = f_pic_ex2_ftdiv &
ex2_aop_valid &
ex2_a_expo_min & //-- really just the implicit bit
(~ex2_a_frac_zero) &
(~f_pic_ex2_nj_deni) & //-- don't flush if converting inputs to zero
ex2_a_expo[5] ; //-- <== sp denorm !!
// really just the implicit bit
assign ex2_b_den_dp = f_pic_ex2_flush_en_dp & ex2_bop_valid & ex2_b_expo_min & (~ex2_b_frac_zero) & (~f_pic_ex2_nj_deni) & (~ex2_b_expo[5]); // don't flush if converting inputs to zero
// <== dp denorm !!
// from integer still needs to fix SP denorms
// really just the implicit bit
assign ex2_b_den_sp = f_pic_ex2_flush_en_sp & ex2_bop_valid & ex2_b_expo_min & (~ex2_b_frac_zero) & (~(f_pic_ex2_nj_deni & (~ex2_from_integer))) & ex2_b_expo[5]; // don't flush if converting inputs to zero
// <== sp denorm !!
assign ex2_a_den_flush = ex2_a_den_sp | ex2_a_den_dp;
// really just the implicit bit
assign ex2_a_den_dp = f_pic_ex2_flush_en_dp & ex2_aop_valid & ex2_a_expo_min & (~ex2_a_frac_zero) & (~f_pic_ex2_nj_deni) & (~ex2_a_expo[5]); // don't flush if converting inputs to zero
// <== dp denorm !!
// from integer still needs to fix SP denorms
// really just the implicit bit
assign ex2_a_den_sp = f_pic_ex2_flush_en_sp & ex2_aop_valid & ex2_a_expo_min & (~ex2_a_frac_zero) & (~(f_pic_ex2_nj_deni & (~ex2_from_integer))) & ex2_a_expo[5]; // don't flush if converting inputs to zero
// <== sp denorm !!
//lookup result will be denormal
assign ex2_lu_den_part = ex2_b_frac[1] & ex2_b_frac[2] & ex2_b_frac[3] & ex2_b_frac[4] & ex2_b_frac[5] & ex2_b_frac[6] & ex2_b_frac[7] & ex2_b_frac[8] & ex2_b_frac[9] & ex2_b_frac[10] & ex2_b_frac[11] & ex2_b_frac[12];
assign ex2_recip_lo = ex2_b_frac[14] | ex2_b_frac[15] | ex2_b_frac[16] | ex2_b_frac[17] | (ex2_b_frac[18] & ex2_b_frac[19]) | (ex2_b_frac[18] & ex2_b_frac[20]);
// 0 1 2
// 1234 56 78 9012 3456 7890 12
// 1111 11 11 1111 1011 recip
// 1111 11 11 1111 1010 0001 01 recip
//
// 1111 11 11 1111 0001 rsqo
// 366FFF0980000000 real boubdary for recip sqrt even
// FFF098 real boubdary for recip sqrt even
//
// 1111 1111 1111 0000 1001 1000
// 1234 5678 9012 3456 7890
// 0 1 2
// 3CFFFF8500000000 real boundary for reciprocal
// FFF85
// 1111 1111 1111 1000 01010
// 1234 5678 9012 3456 7890
// 0 1 2
assign ex2_rsqrt_lo = ex2_b_frac[13] | ex2_b_frac[14] | ex2_b_frac[15] | ex2_b_frac[16] | (ex2_b_frac[17] & ex2_b_frac[18]) | (ex2_b_frac[17] & ex2_b_frac[19]) | (ex2_b_frac[17] & ex2_b_frac[20] & ex2_b_frac[21]);
assign ex2_lu_den_recip = (ex2_lu_den_part & ex2_b_frac[13] & ex2_recip_lo);
assign ex2_lu_den_rsqrto = (ex2_lu_den_part & ex2_rsqrt_lo);
assign f_fmt_ex3_lu_den_recip = ex3_lu_den_recip;
assign f_fmt_ex3_lu_den_rsqrto = ex3_lu_den_rsqrto; // name is wrong (even biased, odd unbiased)
// for from_integer if implicit bit is off result is "zero" plus rounding.
assign ex2_a_zero = ex2_aop_valid & ex2_a_zero_x;
assign ex2_c_zero = ex2_cop_valid & ex2_c_zero_x;
assign ex2_b_zero = ex2_bop_valid & ex2_b_zero_x;
assign ex2_a_expo_ltx36A_sp = (ex2_a_expo < 13'b0001101101010) ? 1'b1 : // exp < 0x36A 0d874 (-149 unbiased)
1'b0;
assign ex2_b_expo_ltx36A_sp = (ex2_b_expo < 13'b0001101101010) ? 1'b1 :
1'b0;
assign ex2_a_expo_max_dsq = (ex2_a_expo > 13'b0010001111110) ? 1'b1 :
1'b0;
assign ex2_b_expo_max_dsq = (ex2_b_expo > 13'b0010001111110) ? 1'b1 :
1'b0;
assign f_fmt_ex2_a_zero = ex2_a_zero; //output--
assign f_fmt_ex2_a_zero_dsq = ((~ex2_a_frac[0]) | (ex2_a_expo_ltx36A_sp)) | (ex2_a_expo_min & ex2_a_frac_zero);
assign f_fmt_ex2_a_expo_max = ex2_aop_valid & ex2_a_expo_max; //output--
assign f_fmt_ex2_a_expo_max_dsq = ex2_a_expo_max_dsq; //output--
assign f_fmt_ex2_a_frac_zero = ex2_a_frac_zero; //output--
assign f_fmt_ex2_a_frac_msb = ex2_a_frac_msb; //output--
assign f_fmt_ex2_c_zero = ex2_c_zero; //output--
assign f_fmt_ex2_c_expo_max = ex2_cop_valid & ex2_c_expo_max; //output--
assign f_fmt_ex2_c_frac_zero = ex2_c_frac_zero; //output--
assign f_fmt_ex2_c_frac_msb = ex2_c_frac_msb; //output--
assign f_fmt_ex2_b_zero = ex2_b_zero; //output--
assign f_fmt_ex2_b_zero_dsq = ((~ex2_b_frac[0]) | (ex2_b_expo_ltx36A_sp)) | (ex2_b_expo_min & ex2_b_frac_zero);
assign f_fmt_ex2_b_expo_max = ex2_bop_valid & ex2_b_expo_max; //output--
assign f_fmt_ex2_b_expo_max_dsq = ex2_b_expo_max_dsq; //output--
assign f_fmt_ex2_b_frac_zero = ex2_b_frac_zero; //output--
assign f_fmt_ex2_b_frac_msb = ex2_b_frac_msb; //output--
assign f_fmt_ex2_b_imp = ex2_b_frac[0]; //output--
assign f_fmt_ex2_prod_zero = ex2_a_zero | ex2_c_zero; //output--ex2_bop_valid and
//#=--------------------------------------------------
//#= NAN mux
//#=--------------------------------------------------
// need to zero out sp bits that were left on so we could do a parity check.
assign ex2_a_nan = ex2_a_expo_max & (~ex2_a_frac_zero) & (~ex2_from_integer) & (~ex2_sgncpy) & (~ex2_uc_end_nspec) & (~ex2_uc_mid) & (~f_dcd_ex2_perr_fsel_ovrd);
assign ex2_c_nan = ex2_c_expo_max & (~ex2_c_frac_zero) & (~ex2_from_integer) & (~ex2_fsel) & (~ex2_uc_end_nspec) & (~ex2_uc_mid);
assign ex2_b_nan = ex2_b_expo_max & (~ex2_b_frac_zero) & (~ex2_from_integer) & (~ex2_fsel) & (~ex2_uc_end_nspec) & (~ex2_uc_mid);
assign ex2_nan_pass = ex2_a_nan | ex2_c_nan | ex2_b_nan;
assign ex2_pass_sel = ex2_nan_pass | ex2_fsel | ex2_force_pass;
assign f_fmt_ex2_pass_sel = ex2_pass_sel; //output--
// a positive
assign ex2_fsel_cif = (ex2_fsel & (~ex2_a_sign) & (~f_dcd_ex2_perr_fsel_ovrd)) |
(ex2_fsel & ex2_a_zero & (~f_dcd_ex2_perr_fsel_ovrd)) |
( f_dcd_ex2_perr_force_c & ( f_dcd_ex2_perr_fsel_ovrd));
assign ex2_be_den =
( ex2_b_expo[1] ) | // it is negative
( (~ex2_b_expo[2]) & // it is x000 ... as opposed to x001
(~ex2_b_expo[3]) & // it is x000 ... as opposed to x001
(~ex2_b_expo[4]) & // it is x000 ... as opposed to x001
(~ex2_b_expo[5]) & // it is x000 ... as opposed to x001
(~ex2_b_expo[6]) & // it is x000 ... as opposed to x001
(~ex2_b_expo[7]) & // it is x000 ... as opposed to x001
(~ex2_b_expo[8]) & // it is x000 ... as opposed to x001
(~ex2_b_expo[9]) & // it is x000 ... as opposed to x001
(~ex2_b_expo[10]) & // it is x000 ... as opposed to x001
(~ex2_b_expo[11]) & // it is x000 ... as opposed to x001
(~ex2_b_expo[12]) & // it is x000 ... as opposed to x001
(~ex2_b_expo[13]) ); // it is x000 ... as opposed to x001
assign ex2_fsel_bsel = ex2_fsel & (ex2_a_nan | (~ex2_fsel_cif));
assign ex2_mux_a_sel = ex2_a_nan & (~ex2_fsel);
assign ex2_mux_c_sel = ((~ex2_a_nan) & (~ex2_b_nan) & ex2_c_nan) | (ex2_a_nan & (~ex2_fsel)) | ((~ex2_a_nan) & ex2_fsel & ex2_fsel_cif);
assign ex2_pass_sign_ac = (ex2_mux_a_sel & ex2_a_sign) | ((~ex2_mux_a_sel) & ex2_c_sign);
assign ex2_pass_sign = (ex2_mux_c_sel & ex2_pass_sign_ac) | ((~ex2_mux_c_sel) & ex2_b_sign);
assign ex2_a_frac_chop[0:23] = ex2_a_frac[0:23];
assign ex2_c_frac_chop[0:23] = ex2_c_frac[0:23];
assign ex2_b_frac_chop[0:23] = ex2_b_frac[0:23];
assign ex2_a_frac_chop[24:52] = ex2_a_frac[24:52];
assign ex2_c_frac_chop[24:52] = ex2_c_frac[24:52];
assign ex2_b_frac_chop[24:52] = ex2_b_frac[24:52];
assign ex2_a_expo_ltx381_sp = ex2_a_expo_ltx381 & ex2_a_sp;
assign ex2_c_expo_ltx381_sp = ex2_c_expo_ltx381 & ex2_c_sp;
assign ex2_b_expo_ltx381_sp = ex2_b_expo_ltx381 & ex2_b_sp;
// negative
assign ex2_a_expo_ltx381 = ((~ex2_a_expo_b[1])) | (ex2_a_expo_00xx_xxxx_xxxx & (~ex2_a_expo_xx11_1xxx_xxxx)) | (ex2_a_expo_00xx_xxxx_xxxx & ex2_a_expo_xx11_1xxx_xxxx & ex2_a_expo_xxxx_x000_0000); // lt x380
// eq x380
assign ex2_a_expo_00xx_xxxx_xxxx = ex2_a_expo_b[2] & ex2_a_expo_b[3];
assign ex2_a_expo_xx11_1xxx_xxxx = (~ex2_a_expo_b[4]) & (~ex2_a_expo_b[5]) & (~ex2_a_expo_b[6]);
assign ex2_a_expo_xxxx_x000_0000 = ex2_a_expo_b[7] & ex2_a_expo_b[8] & ex2_a_expo_b[9] & ex2_a_expo_b[10] & ex2_a_expo_b[11] & ex2_a_expo_b[12] & ex2_a_expo_b[13];
// negative
assign ex2_c_expo_ltx381 = ((~ex2_c_expo_b[1])) | (ex2_c_expo_00xx_xxxx_xxxx & (~ex2_c_expo_xx11_1xxx_xxxx)) | (ex2_c_expo_00xx_xxxx_xxxx & ex2_c_expo_xx11_1xxx_xxxx & ex2_c_expo_xxxx_x000_0000); // lt x380
// eq x380
assign ex2_c_expo_00xx_xxxx_xxxx = ex2_c_expo_b[2] & ex2_c_expo_b[3];
assign ex2_c_expo_xx11_1xxx_xxxx = (~ex2_c_expo_b[4]) & (~ex2_c_expo_b[5]) & (~ex2_c_expo_b[6]);
assign ex2_c_expo_xxxx_x000_0000 = ex2_c_expo_b[7] & ex2_c_expo_b[8] & ex2_c_expo_b[9] & ex2_c_expo_b[10] & ex2_c_expo_b[11] & ex2_c_expo_b[12] & ex2_c_expo_b[13];
// negative
assign ex2_b_expo_ltx381 = ((~ex2_b_expo_b[1])) | (ex2_b_expo_00xx_xxxx_xxxx & (~ex2_b_expo_xx11_1xxx_xxxx)) | (ex2_b_expo_00xx_xxxx_xxxx & ex2_b_expo_xx11_1xxx_xxxx & ex2_b_expo_xxxx_x000_0000); // lt x380
// eq x380
assign ex2_b_expo_00xx_xxxx_xxxx = ex2_b_expo_b[2] & ex2_b_expo_b[3];
assign ex2_b_expo_xx11_1xxx_xxxx = (~ex2_b_expo_b[4]) & (~ex2_b_expo_b[5]) & (~ex2_b_expo_b[6]);
assign ex2_b_expo_xxxx_x000_0000 = ex2_b_expo_b[7] & ex2_b_expo_b[8] & ex2_b_expo_b[9] & ex2_b_expo_b[10] & ex2_b_expo_b[11] & ex2_b_expo_b[12] & ex2_b_expo_b[13];
assign ex2_pass_frac_ac[0:52] = ({53{ex2_mux_a_sel}} & ex2_a_frac_chop[0:52]) |
({53{(~ex2_mux_a_sel)}} & ex2_c_frac_chop[0:52]);
assign ex2_pass_frac[0:52] = ({53{ex2_mux_c_sel}} & ex2_pass_frac_ac[0:52]) |
({53{(~ex2_mux_c_sel)}} & ex2_b_frac_chop[0:52]);
// last iteration of divide = X * 1, check if x is a denorm
// expo is neg
assign ex2_uc_a_expo_den = ((~ex2_a_expo_b[1])) | (ex2_a_expo_b[2] & ex2_a_expo_b[3] & ex2_a_expo_b[4] & ex2_a_expo_b[5] & ex2_a_expo_b[6] & ex2_a_expo_b[7] & ex2_a_expo_b[8] & ex2_a_expo_b[9] & ex2_a_expo_b[10] & ex2_a_expo_b[11] & ex2_a_expo_b[12] & ex2_a_expo_b[13]); // expo is all zeroes
// for SP we also need to add denorms <= x381
assign ex2_uc_a_expo_den_sp = ex2_a_expo_ltx381;
assign ex2_a_sp_inf_alias_tail = (~ex2_a_expo_b[7]) & (~ex2_a_expo_b[8]) & (~ex2_a_expo_b[9]) & (~ex2_a_expo_b[10]) & (~ex2_a_expo_b[11]) & (~ex2_a_expo_b[12]) & (~ex2_a_expo_b[13]);
assign ex2_c_sp_inf_alias_tail = (~ex2_c_expo_b[7]) & (~ex2_c_expo_b[8]) & (~ex2_c_expo_b[9]) & (~ex2_c_expo_b[10]) & (~ex2_c_expo_b[11]) & (~ex2_c_expo_b[12]) & (~ex2_c_expo_b[13]);
assign ex2_b_sp_inf_alias_tail = (~ex2_b_expo_b[7]) & (~ex2_b_expo_b[8]) & (~ex2_b_expo_b[9]) & (~ex2_b_expo_b[10]) & (~ex2_b_expo_b[11]) & (~ex2_b_expo_b[12]) & (~ex2_b_expo_b[13]);
// 1024:1151 1151=1024+127 (exclude 1151)
// sign
// 2048
// 1024
// 512
// 256
assign ex2_a_sp_expo_ok_1 = ex2_a_expo_b[1] & ex2_a_expo_b[2] & (~ex2_a_expo_b[3]) & ex2_a_expo_b[4] & ex2_a_expo_b[5] & ex2_a_expo_b[6] & (~ex2_a_sp_inf_alias_tail); // 128;
// 1024:1151 1151=1024+127 (exclude 1151)
// sign
// 2048
// 1024
// 512
// 256
assign ex2_c_sp_expo_ok_1 = ex2_c_expo_b[1] & ex2_c_expo_b[2] & (~ex2_c_expo_b[3]) & ex2_c_expo_b[4] & ex2_c_expo_b[5] & ex2_c_expo_b[6] & (~ex2_c_sp_inf_alias_tail); // 128;
// 1024:1151 1151=1024+127 (exclude 1151)
// sign
// 2048
// 1024
// 512
// 256
assign ex2_b_sp_expo_ok_1 = ex2_b_expo_b[1] & ex2_b_expo_b[2] & (~ex2_b_expo_b[3]) & ex2_b_expo_b[4] & ex2_b_expo_b[5] & ex2_b_expo_b[6] & (~ex2_b_sp_inf_alias_tail); // 128;
// 897:1023 <the include 896 ... dp norm masquerading as sp denorm
// sign
// 2048
// 1024
// 512
assign ex2_a_sp_expo_ok_2 = ex2_a_expo_b[1] & ex2_a_expo_b[2] & ex2_a_expo_b[3] & (~ex2_a_expo_b[4]) & (~ex2_a_expo_b[5]) & (~ex2_a_expo_b[6]); // 256
// 128;
// 897:1023 <the include 896 ... dp norm masquerading as sp denorm
// sign
// 2048
// 1024
// 512
assign ex2_c_sp_expo_ok_2 = ex2_c_expo_b[1] & ex2_c_expo_b[2] & ex2_c_expo_b[3] & (~ex2_c_expo_b[4]) & (~ex2_c_expo_b[5]) & (~ex2_c_expo_b[6]); // 256
// 128;
// 897:1023 <the include 896 ... dp norm masquerading as sp denorm
// sign
// 2048
// 1024
// 512
assign ex2_b_sp_expo_ok_2 = ex2_b_expo_b[1] & ex2_b_expo_b[2] & ex2_b_expo_b[3] & (~ex2_b_expo_b[4]) & (~ex2_b_expo_b[5]) & (~ex2_b_expo_b[6]); // 256
// 128;
// sp_den 873:895 1 2345 6789
// x0_0011_1xxx_xxx 896:969
// x0_0011_0111_xxx 880:895
// x0_0011_0110_xxx 864:879 0_0011_0110_1010 874 sp_min
// 897:1023 <the include 896 ... dp norm masquerading as sp denorm
// sign
// 2048
// 1024
// 512
// 256
// 128
// 64
assign ex2_a_sp_expo_ok_3 = ex2_a_expo_b[1] & ex2_a_expo_b[2] & ex2_a_expo_b[3] & (~ex2_a_expo_b[4]) & (~ex2_a_expo_b[5]) & ex2_a_expo_b[6] & (~ex2_a_expo_b[7]) & (~ex2_a_expo_b[8]) & (~ex2_a_expo_b[9]); // 32
// 16
// 897:1023 <the include 896 ... dp norm masquerading as sp denorm
// sign
// 2048
// 1024
// 512
// 256
// 128
// 64
assign ex2_c_sp_expo_ok_3 = ex2_c_expo_b[1] & ex2_c_expo_b[2] & ex2_c_expo_b[3] & (~ex2_c_expo_b[4]) & (~ex2_c_expo_b[5]) & ex2_c_expo_b[6] & (~ex2_c_expo_b[7]) & (~ex2_c_expo_b[8]) & (~ex2_c_expo_b[9]); // 32
// 16
// 897:1023 <the include 896 ... dp norm masquerading as sp denorm
// sign
// 2048
// 1024
// 512
// 256
// 128
// 64
assign ex2_b_sp_expo_ok_3 = ex2_b_expo_b[1] & ex2_b_expo_b[2] & ex2_b_expo_b[3] & (~ex2_b_expo_b[4]) & (~ex2_b_expo_b[5]) & ex2_b_expo_b[6] & (~ex2_b_expo_b[7]) & (~ex2_b_expo_b[8]) & (~ex2_b_expo_b[9]); // 32
// 16
// sp_den 873:895 1 2345 6789
// x0_0011_1xxx_xxx 896:969
// x0_0011_0111_xxx 880:895
// x0_0011_0110_xxx 864:879 0_0011_0110_1010 874 sp_min
// 897:1023 <the include 896 ... dp norm masquerading as sp denorm
// sign
// 2048
// 1024
// 512
// 256
// 128
// 64
// 32
assign ex2_a_sp_expo_ok_4 = ex2_a_expo_b[1] & ex2_a_expo_b[2] & ex2_a_expo_b[3] & (~ex2_a_expo_b[4]) & (~ex2_a_expo_b[5]) & ex2_a_expo_b[6] & (~ex2_a_expo_b[7]) & (~ex2_a_expo_b[8]) & ex2_a_expo_b[9] & (((~ex2_a_expo_b[10]) & (~ex2_a_expo_b[11])) | ((~ex2_a_expo_b[10]) & (~ex2_a_expo_b[12]))); // 16
// 897:1023 <the include 896 ... dp norm masquerading as sp denorm
// sign
// 2048
// 1024
// 512
// 256
// 128
// 64
// 32
assign ex2_c_sp_expo_ok_4 = ex2_c_expo_b[1] & ex2_c_expo_b[2] & ex2_c_expo_b[3] & (~ex2_c_expo_b[4]) & (~ex2_c_expo_b[5]) & ex2_c_expo_b[6] & (~ex2_c_expo_b[7]) & (~ex2_c_expo_b[8]) & ex2_c_expo_b[9] & (((~ex2_c_expo_b[10]) & (~ex2_c_expo_b[11])) | ((~ex2_c_expo_b[10]) & (~ex2_c_expo_b[12]))); // 16
// 897:1023 <the include 896 ... dp norm masquerading as sp denorm
// sign
// 2048
// 1024
// 512
// 256
// 128
// 64
// 32
assign ex2_b_sp_expo_ok_4 = ex2_b_expo_b[1] & ex2_b_expo_b[2] & ex2_b_expo_b[3] & (~ex2_b_expo_b[4]) & (~ex2_b_expo_b[5]) & ex2_b_expo_b[6] & (~ex2_b_expo_b[7]) & (~ex2_b_expo_b[8]) & ex2_b_expo_b[9] & (((~ex2_b_expo_b[10]) & (~ex2_b_expo_b[11])) | ((~ex2_b_expo_b[10]) & (~ex2_b_expo_b[12]))); // 16
// want to include dp norm masquerading as sp_denorm
// 1 2345 6789 0123
// ----------------
// x380 896 0_0011_1000_0000 0x000000_00000000_00000000 <1>
// 895 0_0011_0111_1111 00x00000_00000000_00000000 <2>
// 894 0_0011_0111_1110 000x0000_00000000_00000000 <3>
// 893 0_0011_0111_1101 0000x000_00000000_00000000 <4>
// 892 0_0011_0111_1100 00000x00_00000000_00000000 <5>
// 891 0_0011_0111_1011 000000x0_00000000_00000000 <6>
// 890 0_0011_0111_1010 0000000x_00000000_00000000 <7>
// 889 0_0011_0111_1001 00000000_x0000000_00000000 <8>
// 888 0_0011_0111_1000 00000000_0x000000_00000000 <9>
// 887 0_0011_0111_0111 00000000_00x00000_00000000 <10>
// 886 0_0011_0111_0110 00000000_000x0000_00000000 <11>
// 885 0_0011_0111_0101 00000000_0000x000_00000000 <12>
// 884 0_0011_0111_0100 00000000_00000x00_00000000 <13>
// 883 0_0011_0111_0011 00000000_000000x0_00000000 <14>
// 882 0_0011_0111_0010 00000000_0000000x_00000000 <15>
// 881 0_0011_0111_0001 00000000_00000000_x0000000 <16>
// 880 0_0011_0111_0000 00000000_00000000_0x000000 <17>
// 879 0_0011_0110_1111 00000000_00000000_00x00000 <18>
// 878 0_0011_0110_1110 00000000_00000000_000x0000 <19>
// 877 0_0011_0110_1101 00000000_00000000_0000x000 <20>
// 876 0_0011_0110_1100 00000000_00000000_00000x00 <21>
// 875 0_0011_0110_1011 00000000_00000000_000000x0 <22>
// x37A 874 0_0011_0110_1010 00000000_00000000_0000000x <23>
assign f_fmt_ex2_sp_invalid = ((~ex2_a_sp_expo_ok_1) & (~ex2_a_sp_expo_ok_2) & (~ex2_a_sp_expo_ok_3) & (~ex2_a_sp_expo_ok_4) & (~ex2_a_expo_max) & (~ex2_a_zero_x)) | ((~ex2_c_sp_expo_ok_1) & (~ex2_c_sp_expo_ok_2) & (~ex2_c_sp_expo_ok_3) & (~ex2_c_sp_expo_ok_4) & (~ex2_c_expo_max) & (~ex2_c_zero_x)) | ((~ex2_b_sp_expo_ok_1) & (~ex2_b_sp_expo_ok_2) & (~ex2_b_sp_expo_ok_3) & (~ex2_b_sp_expo_ok_4) & (~ex2_b_expo_max) & (~ex2_b_zero_x));
//#=##############################################################
//# ex3 latches (from ex2 logic)
//#=##############################################################
assign ex2_a_party[0] = ex2_a_sign ^ ex2_a_expo[1] ^ ex2_a_expo[2] ^ ex2_a_expo[3] ^ ex2_a_expo[4] ^ ex2_a_expo[5] ^ ex2_a_expo[6] ^ ex2_a_expo[7] ^ ex2_a_expo[8] ^ ex2_a_expo[9];
assign ex2_a_party[1] = ex2_a_expo[10] ^ ex2_a_expo[11] ^ ex2_a_expo[12] ^ ex2_a_expo[13] ^ ex2_a_frac[0] ^ ex2_a_frac[1] ^ ex2_a_frac[2] ^ ex2_a_frac[3] ^ ex2_a_frac[4];
assign ex2_a_party[2] = ex2_a_frac[5] ^ ex2_a_frac[6] ^ ex2_a_frac[7] ^ ex2_a_frac[8] ^ ex2_a_frac[9] ^ ex2_a_frac[10] ^ ex2_a_frac[11] ^ ex2_a_frac[12];
assign ex2_a_party[3] = ex2_a_frac[13] ^ ex2_a_frac[14] ^ ex2_a_frac[15] ^ ex2_a_frac[16] ^ ex2_a_frac[17] ^ ex2_a_frac[18] ^ ex2_a_frac[19] ^ ex2_a_frac[20];
assign ex2_a_party[4] = ex2_a_frac[21] ^ ex2_a_frac[22] ^ ex2_a_frac[23] ^ ex2_a_frac[24] ^ ex2_a_frac[25] ^ ex2_a_frac[26] ^ ex2_a_frac[27] ^ ex2_a_frac[28];
assign ex2_a_party[5] = ex2_a_frac[29] ^ ex2_a_frac[30] ^ ex2_a_frac[31] ^ ex2_a_frac[32] ^ ex2_a_frac[33] ^ ex2_a_frac[34] ^ ex2_a_frac[35] ^ ex2_a_frac[36];
assign ex2_a_party[6] = ex2_a_frac[37] ^ ex2_a_frac[38] ^ ex2_a_frac[39] ^ ex2_a_frac[40] ^ ex2_a_frac[41] ^ ex2_a_frac[42] ^ ex2_a_frac[43] ^ ex2_a_frac[44];
assign ex2_a_party[7] = ex2_a_frac[45] ^ ex2_a_frac[46] ^ ex2_a_frac[47] ^ ex2_a_frac[48] ^ ex2_a_frac[49] ^ ex2_a_frac[50] ^ ex2_a_frac[51] ^ ex2_a_frac[52];
assign ex2_c_party[0] = ex2_c_sign ^ ex2_c_expo[1] ^ ex2_c_expo[2] ^ ex2_c_expo[3] ^ ex2_c_expo[4] ^ ex2_c_expo[5] ^ ex2_c_expo[6] ^ ex2_c_expo[7] ^ ex2_c_expo[8] ^ ex2_c_expo[9];
assign ex2_c_party[1] = ex2_c_expo[10] ^ ex2_c_expo[11] ^ ex2_c_expo[12] ^ ex2_c_expo[13] ^ ex2_c_frac[0] ^ ex2_c_frac[1] ^ ex2_c_frac[2] ^ ex2_c_frac[3] ^ ex2_c_frac[4];
assign ex2_c_party[2] = ex2_c_frac[5] ^ ex2_c_frac[6] ^ ex2_c_frac[7] ^ ex2_c_frac[8] ^ ex2_c_frac[9] ^ ex2_c_frac[10] ^ ex2_c_frac[11] ^ ex2_c_frac[12];
assign ex2_c_party[3] = ex2_c_frac[13] ^ ex2_c_frac[14] ^ ex2_c_frac[15] ^ ex2_c_frac[16] ^ ex2_c_frac[17] ^ ex2_c_frac[18] ^ ex2_c_frac[19] ^ ex2_c_frac[20];
assign ex2_c_party[4] = ex2_c_frac[21] ^ ex2_c_frac[22] ^ ex2_c_frac[23] ^ ex2_c_frac[24] ^ ex2_c_frac[25] ^ ex2_c_frac[26] ^ ex2_c_frac[27] ^ ex2_c_frac[28];
assign ex2_c_party[5] = ex2_c_frac[29] ^ ex2_c_frac[30] ^ ex2_c_frac[31] ^ ex2_c_frac[32] ^ ex2_c_frac[33] ^ ex2_c_frac[34] ^ ex2_c_frac[35] ^ ex2_c_frac[36];
assign ex2_c_party[6] = ex2_c_frac[37] ^ ex2_c_frac[38] ^ ex2_c_frac[39] ^ ex2_c_frac[40] ^ ex2_c_frac[41] ^ ex2_c_frac[42] ^ ex2_c_frac[43] ^ ex2_c_frac[44];
assign ex2_c_party[7] = ex2_c_frac[45] ^ ex2_c_frac[46] ^ ex2_c_frac[47] ^ ex2_c_frac[48] ^ ex2_c_frac[49] ^ ex2_c_frac[50] ^ ex2_c_frac[51] ^ ex2_c_frac[52];
assign ex2_b_party[0] = ex2_b_sign ^ ex2_b_expo[1] ^ ex2_b_expo[2] ^ ex2_b_expo[3] ^ ex2_b_expo[4] ^ ex2_b_expo[5] ^ ex2_b_expo[6] ^ ex2_b_expo[7] ^ ex2_b_expo[8] ^ ex2_b_expo[9];
assign ex2_b_party[1] = ex2_b_expo[10] ^ ex2_b_expo[11] ^ ex2_b_expo[12] ^ ex2_b_expo[13] ^ ex2_b_frac[0] ^ ex2_b_frac[1] ^ ex2_b_frac[2] ^ ex2_b_frac[3] ^ ex2_b_frac[4];
assign ex2_b_party[2] = ex2_b_frac[5] ^ ex2_b_frac[6] ^ ex2_b_frac[7] ^ ex2_b_frac[8] ^ ex2_b_frac[9] ^ ex2_b_frac[10] ^ ex2_b_frac[11] ^ ex2_b_frac[12];
assign ex2_b_party[3] = ex2_b_frac[13] ^ ex2_b_frac[14] ^ ex2_b_frac[15] ^ ex2_b_frac[16] ^ ex2_b_frac[17] ^ ex2_b_frac[18] ^ ex2_b_frac[19] ^ ex2_b_frac[20];
assign ex2_b_party[4] = ex2_b_frac[21] ^ ex2_b_frac[22] ^ ex2_b_frac[23] ^ ex2_b_frac[24] ^ ex2_b_frac[25] ^ ex2_b_frac[26] ^ ex2_b_frac[27] ^ ex2_b_frac[28];
assign ex2_b_party[5] = ex2_b_frac[29] ^ ex2_b_frac[30] ^ ex2_b_frac[31] ^ ex2_b_frac[32] ^ ex2_b_frac[33] ^ ex2_b_frac[34] ^ ex2_b_frac[35] ^ ex2_b_frac[36];
assign ex2_b_party[6] = ex2_b_frac[37] ^ ex2_b_frac[38] ^ ex2_b_frac[39] ^ ex2_b_frac[40] ^ ex2_b_frac[41] ^ ex2_b_frac[42] ^ ex2_b_frac[43] ^ ex2_b_frac[44];
assign ex2_b_party[7] = ex2_b_frac[45] ^ ex2_b_frac[46] ^ ex2_b_frac[47] ^ ex2_b_frac[48] ^ ex2_b_frac[49] ^ ex2_b_frac[50] ^ ex2_b_frac[51] ^ ex2_b_frac[52];
assign ex2_a_party_chick = (ex2_a_party[0] ^ f_fpr_ex2_a_par[0]) | (ex2_a_party[1] ^ f_fpr_ex2_a_par[1]) | (ex2_a_party[2] ^ f_fpr_ex2_a_par[2]) | (ex2_a_party[3] ^ f_fpr_ex2_a_par[3]) | (ex2_a_party[4] ^ f_fpr_ex2_a_par[4]) | (ex2_a_party[5] ^ f_fpr_ex2_a_par[5]) | (ex2_a_party[6] ^ f_fpr_ex2_a_par[6]) | (ex2_a_party[7] ^ f_fpr_ex2_a_par[7]);
assign ex2_c_party_chick = (ex2_c_party[0] ^ f_fpr_ex2_c_par[0]) | (ex2_c_party[1] ^ f_fpr_ex2_c_par[1]) | (ex2_c_party[2] ^ f_fpr_ex2_c_par[2]) | (ex2_c_party[3] ^ f_fpr_ex2_c_par[3]) | (ex2_c_party[4] ^ f_fpr_ex2_c_par[4]) | (ex2_c_party[5] ^ f_fpr_ex2_c_par[5]) | (ex2_c_party[6] ^ f_fpr_ex2_c_par[6]) | (ex2_c_party[7] ^ f_fpr_ex2_c_par[7]);
assign ex2_b_party_chick = (ex2_b_party[0] ^ f_fpr_ex2_b_par[0]) | (ex2_b_party[1] ^ f_fpr_ex2_b_par[1]) | (ex2_b_party[2] ^ f_fpr_ex2_b_par[2]) | (ex2_b_party[3] ^ f_fpr_ex2_b_par[3]) | (ex2_b_party[4] ^ f_fpr_ex2_b_par[4]) | (ex2_b_party[5] ^ f_fpr_ex2_b_par[5]) | (ex2_b_party[6] ^ f_fpr_ex2_b_par[6]) | (ex2_b_party[7] ^ f_fpr_ex2_b_par[7]);
// ---------------------------------------------------------------------
// more logic for ftdiv ftsqrt
// ---------------------------------------------------------------------
//----------------------------------------------------
// x LE 53 == !(x ge 54)
// 1 - 2345 - 6789 - ABCD
// 54 0 0000 0011 0110
// x_le_53 <= not x_ge_54 ;
// x_ge_54 =( ![1] * [2+3+4+5+6+7] ) +
// ( ![1] * [8][9][A] ) +
// ( ![1] * [8][9][B][C] );
//----------------------------------------------------
assign ex2_ae_234567 = ex2_a_expo[2] | ex2_a_expo[3] | ex2_a_expo[4] | ex2_a_expo[5] | ex2_a_expo[6] | ex2_a_expo[7];
assign ex2_ae_89 = ex2_a_expo[8] & ex2_a_expo[9];
assign ex2_ae_abc = ex2_a_expo[10] | (ex2_a_expo[11] & ex2_a_expo[12]);
assign ex2_ae_ge_54 = ((~ex2_a_expo[1]) & ex2_ae_234567) | ((~ex2_a_expo[1]) & ex2_ae_89 & ex2_ae_abc);
assign ex2_be_234567 = ex2_b_expo[2] | ex2_b_expo[3] | ex2_b_expo[4] | ex2_b_expo[5] | ex2_b_expo[6] | ex2_b_expo[7];
assign ex2_be_89 = ex2_b_expo[8] & ex2_b_expo[9];
assign ex2_be_abc = ex2_b_expo[10] | (ex2_b_expo[11] & ex2_b_expo[12]);
assign ex2_be_ge_54 = ((~ex2_b_expo[1]) & ex2_be_234567) | ((~ex2_b_expo[1]) & ex2_be_89 & ex2_be_abc);
//----------------------------------------------------
// x le 1 == !(x ge 2) -1022+1023 = 1
// x ge 2044 1021+1023 = 2044
//
//
// 1 - 2345 - 6789 - ABCD
// 2 0 0000 0000 0010
// 2044 0 1111 1111 1100
//----------------------------------------------------
assign ex2_be_or_23456789abc = ex2_b_expo[2] | ex2_b_expo[3] | ex2_b_expo[4] | ex2_b_expo[5] | ex2_b_expo[6] | ex2_b_expo[7] | ex2_b_expo[8] | ex2_b_expo[9] | ex2_b_expo[10] | ex2_b_expo[11] | ex2_b_expo[12];
assign ex2_be_and_3456789ab = ex2_b_expo[3] & ex2_b_expo[4] & ex2_b_expo[5] & ex2_b_expo[6] & ex2_b_expo[7] & ex2_b_expo[8] & ex2_b_expo[9] & ex2_b_expo[10] & ex2_b_expo[11];
assign ex2_be_ge_2 = (~ex2_b_expo[1]) & ex2_be_or_23456789abc;
assign ex2_be_ge_2044 = ((~ex2_b_expo[1]) & ex2_be_and_3456789ab) | ((~ex2_b_expo[1]) & ex2_b_expo[2]);
//----------------------------------------------------
// ae - be >= 1023 (same for biased, unbiased) !!
// ae - be <= -1021 ..... !(ae - be >= -1020)
//
// 1 - 2345 - 6789 - ABCD
// 1023 0 0011 1111 1111
// 1022 0 0011 1111 1110
// -1022 1 1100 0000 0010
// (note ... a,b will always both be positive ) ... 1,2 ==0
//
// ae - be - 1023 >= 0 , ae + !be + 1 - 1023 , (ae + !be -1022 >= 0) ... co = 1 <= x
// !(ae - be +1022 >= 0) , !(ae + !be + 1 + 1020) , !(ae + !be +1021 >= 0) ... co = 0 <= y
assign ex2_aembex_car_b[0] = (~(ex2_a_expo[1] | ex2_b_expo_b[1])); //1
assign ex2_aembex_car_b[1] = (~(ex2_a_expo[2] | ex2_b_expo_b[2])); //1
assign ex2_aembex_car_b[2] = (~(ex2_a_expo[3] | ex2_b_expo_b[3])); //1
assign ex2_aembex_car_b[3] = (~(ex2_a_expo[4] & ex2_b_expo_b[4])); //0
assign ex2_aembex_car_b[4] = (~(ex2_a_expo[5] & ex2_b_expo_b[5])); //0
assign ex2_aembex_car_b[5] = (~(ex2_a_expo[6] & ex2_b_expo_b[6])); //0
assign ex2_aembex_car_b[6] = (~(ex2_a_expo[7] & ex2_b_expo_b[7])); //0
assign ex2_aembex_car_b[7] = (~(ex2_a_expo[8] & ex2_b_expo_b[8])); //0
assign ex2_aembex_car_b[8] = (~(ex2_a_expo[9] & ex2_b_expo_b[9])); //0
assign ex2_aembex_car_b[9] = (~(ex2_a_expo[10] & ex2_b_expo_b[10])); //0
assign ex2_aembex_car_b[10] = (~(ex2_a_expo[11] & ex2_b_expo_b[11])); //0
assign ex2_aembex_car_b[11] = (~(ex2_a_expo[12] | ex2_b_expo_b[12])); //1
assign ex2_aembex_car_b[12] = (~(ex2_a_expo[13] & ex2_b_expo_b[13])); //0
assign ex2_aembex_sum_b[1] = (ex2_a_expo[1] ^ ex2_b_expo_b[1]); //1
assign ex2_aembex_sum_b[2] = (ex2_a_expo[2] ^ ex2_b_expo_b[2]); //1
assign ex2_aembex_sum_b[3] = (ex2_a_expo[3] ^ ex2_b_expo_b[3]); //1
assign ex2_aembex_sum_b[4] = (~(ex2_a_expo[4] ^ ex2_b_expo_b[4])); //0
assign ex2_aembex_sum_b[5] = (~(ex2_a_expo[5] ^ ex2_b_expo_b[5])); //0
assign ex2_aembex_sum_b[6] = (~(ex2_a_expo[6] ^ ex2_b_expo_b[6])); //0
assign ex2_aembex_sum_b[7] = (~(ex2_a_expo[7] ^ ex2_b_expo_b[7])); //0
assign ex2_aembex_sum_b[8] = (~(ex2_a_expo[8] ^ ex2_b_expo_b[8])); //0
assign ex2_aembex_sum_b[9] = (~(ex2_a_expo[9] ^ ex2_b_expo_b[9])); //0
assign ex2_aembex_sum_b[10] = (~(ex2_a_expo[10] ^ ex2_b_expo_b[10])); //0
assign ex2_aembex_sum_b[11] = (~(ex2_a_expo[11] ^ ex2_b_expo_b[11])); //0
assign ex2_aembex_sum_b[12] = (ex2_a_expo[12] ^ ex2_b_expo_b[12]); //1
assign ex2_aembex_sum_b[13] = (~(ex2_a_expo[13] ^ ex2_b_expo_b[13])); //0
// want to know if the final sign is negative or positive
assign ex2_aembex_sgn = ex2_aembex_sum_b[1] ^ ex2_aembex_car_b[1];
assign ex2_aembex_g1[2:12] = (~(ex2_aembex_sum_b[2:12] | ex2_aembex_car_b[2:12]));
assign ex2_aembex_t1[2:12] = (~(ex2_aembex_sum_b[2:12] & ex2_aembex_car_b[2:12]));
assign ex2_aembex_g2[0] = ex2_aembex_g1[2] | (ex2_aembex_t1[2] & ex2_aembex_g1[3]);
assign ex2_aembex_g2[1] = ex2_aembex_g1[4] | (ex2_aembex_t1[4] & ex2_aembex_g1[5]);
assign ex2_aembex_g2[2] = ex2_aembex_g1[6] | (ex2_aembex_t1[6] & ex2_aembex_g1[7]);
assign ex2_aembex_g2[3] = ex2_aembex_g1[8] | (ex2_aembex_t1[8] & ex2_aembex_g1[9]);
assign ex2_aembex_g2[4] = ex2_aembex_g1[10] | (ex2_aembex_t1[10] & ex2_aembex_g1[11]);
assign ex2_aembex_g2[5] = ex2_aembex_g1[12];
assign ex2_aembex_t2[0] = (ex2_aembex_t1[2] & ex2_aembex_t1[3]);
assign ex2_aembex_t2[1] = (ex2_aembex_t1[4] & ex2_aembex_t1[5]);
assign ex2_aembex_t2[2] = (ex2_aembex_t1[6] & ex2_aembex_t1[7]);
assign ex2_aembex_t2[3] = (ex2_aembex_t1[8] & ex2_aembex_t1[9]);
assign ex2_aembex_t2[4] = (ex2_aembex_t1[10] & ex2_aembex_t1[11]);
assign ex2_aembex_g4[0] = ex2_aembex_g2[0] | (ex2_aembex_t2[0] & ex2_aembex_g2[1]);
assign ex2_aembex_g4[1] = ex2_aembex_g2[2] | (ex2_aembex_t2[2] & ex2_aembex_g2[3]);
assign ex2_aembex_g4[2] = ex2_aembex_g2[4] | (ex2_aembex_t2[4] & ex2_aembex_g2[5]);
assign ex2_aembex_t4[0] = (ex2_aembex_t2[0] & ex2_aembex_t2[1]);
assign ex2_aembex_t4[1] = (ex2_aembex_t2[2] & ex2_aembex_t2[3]);
//--------------------------------------------
assign ex2_aembey_car_b[0] = (~(ex2_a_expo[1] & ex2_b_expo_b[1])); //0
assign ex2_aembey_car_b[1] = (~(ex2_a_expo[2] & ex2_b_expo_b[2])); //0
assign ex2_aembey_car_b[2] = (~(ex2_a_expo[3] & ex2_b_expo_b[3])); //0
assign ex2_aembey_car_b[3] = (~(ex2_a_expo[4] | ex2_b_expo_b[4])); //1
assign ex2_aembey_car_b[4] = (~(ex2_a_expo[5] | ex2_b_expo_b[5])); //1
assign ex2_aembey_car_b[5] = (~(ex2_a_expo[6] | ex2_b_expo_b[6])); //1
assign ex2_aembey_car_b[6] = (~(ex2_a_expo[7] | ex2_b_expo_b[7])); //1
assign ex2_aembey_car_b[7] = (~(ex2_a_expo[8] | ex2_b_expo_b[8])); //1
assign ex2_aembey_car_b[8] = (~(ex2_a_expo[9] | ex2_b_expo_b[9])); //1
assign ex2_aembey_car_b[9] = (~(ex2_a_expo[10] | ex2_b_expo_b[10])); //1
assign ex2_aembey_car_b[10] = (~(ex2_a_expo[11] | ex2_b_expo_b[11])); //1
assign ex2_aembey_car_b[11] = (~(ex2_a_expo[12] & ex2_b_expo_b[12])); //0
assign ex2_aembey_car_b[12] = (~(ex2_a_expo[13] | ex2_b_expo_b[13])); //1
assign ex2_aembey_sum_b[1] = (~(ex2_a_expo[1] ^ ex2_b_expo_b[1])); //0
assign ex2_aembey_sum_b[2] = (~(ex2_a_expo[2] ^ ex2_b_expo_b[2])); //0
assign ex2_aembey_sum_b[3] = (~(ex2_a_expo[3] ^ ex2_b_expo_b[3])); //0
assign ex2_aembey_sum_b[4] = (ex2_a_expo[4] ^ ex2_b_expo_b[4]); //1
assign ex2_aembey_sum_b[5] = (ex2_a_expo[5] ^ ex2_b_expo_b[5]); //1
assign ex2_aembey_sum_b[6] = (ex2_a_expo[6] ^ ex2_b_expo_b[6]); //1
assign ex2_aembey_sum_b[7] = (ex2_a_expo[7] ^ ex2_b_expo_b[7]); //1
assign ex2_aembey_sum_b[8] = (ex2_a_expo[8] ^ ex2_b_expo_b[8]); //1
assign ex2_aembey_sum_b[9] = (ex2_a_expo[9] ^ ex2_b_expo_b[9]); //1
assign ex2_aembey_sum_b[10] = (ex2_a_expo[10] ^ ex2_b_expo_b[10]); //1
assign ex2_aembey_sum_b[11] = (ex2_a_expo[11] ^ ex2_b_expo_b[11]); //1
assign ex2_aembey_sum_b[12] = (~(ex2_a_expo[12] ^ ex2_b_expo_b[12])); //0
assign ex2_aembey_sum_b[13] = (ex2_a_expo[13] ^ ex2_b_expo_b[13]); //1
// want to know if the final sign is negative or positive
assign ex2_aembey_sgn = ex2_aembey_sum_b[1] ^ ex2_aembey_car_b[1];
assign ex2_aembey_g1[2:12] = (~(ex2_aembey_sum_b[2:12] | ex2_aembey_car_b[2:12]));
assign ex2_aembey_t1[2:12] = (~(ex2_aembey_sum_b[2:12] & ex2_aembey_car_b[2:12]));
assign ex2_aembey_g2[0] = ex2_aembey_g1[2] | (ex2_aembey_t1[2] & ex2_aembey_g1[3]);
assign ex2_aembey_g2[1] = ex2_aembey_g1[4] | (ex2_aembey_t1[4] & ex2_aembey_g1[5]);
assign ex2_aembey_g2[2] = ex2_aembey_g1[6] | (ex2_aembey_t1[6] & ex2_aembey_g1[7]);
assign ex2_aembey_g2[3] = ex2_aembey_g1[8] | (ex2_aembey_t1[8] & ex2_aembey_g1[9]);
assign ex2_aembey_g2[4] = ex2_aembey_g1[10] | (ex2_aembey_t1[10] & ex2_aembey_g1[11]);
assign ex2_aembey_g2[5] = ex2_aembey_g1[12];
assign ex2_aembey_t2[0] = (ex2_aembey_t1[2] & ex2_aembey_t1[3]);
assign ex2_aembey_t2[1] = (ex2_aembey_t1[4] & ex2_aembey_t1[5]);
assign ex2_aembey_t2[2] = (ex2_aembey_t1[6] & ex2_aembey_t1[7]);
assign ex2_aembey_t2[3] = (ex2_aembey_t1[8] & ex2_aembey_t1[9]);
assign ex2_aembey_t2[4] = (ex2_aembey_t1[10] & ex2_aembey_t1[11]);
assign ex2_aembey_g4[0] = ex2_aembey_g2[0] | (ex2_aembey_t2[0] & ex2_aembey_g2[1]);
assign ex2_aembey_g4[1] = ex2_aembey_g2[2] | (ex2_aembey_t2[2] & ex2_aembey_g2[3]);
assign ex2_aembey_g4[2] = ex2_aembey_g2[4] | (ex2_aembey_t2[4] & ex2_aembey_g2[5]);
assign ex2_aembey_t4[0] = (ex2_aembey_t2[0] & ex2_aembey_t2[1]);
assign ex2_aembey_t4[1] = (ex2_aembey_t2[2] & ex2_aembey_t2[3]);
//----------------------------------------------------
tri_rlmreg_p #(.WIDTH(80), .IBUF(1'B1), .NEEDS_SRESET(0)) ex3_pass_lat(
.force_t(force_t), //i-- tidn,
.d_mode(tiup),
.delay_lclkr(delay_lclkr[2]), //i-- tidn,
.mpw1_b(mpw1_b[2]), //i-- tidn,
.mpw2_b(mpw2_b[0]), //i-- tidn,
.vd(vdd),
.gd(gnd),
.clk(clk),
.rst(rst),
.act(ex2_act),
.thold_b(thold_0_b),
.sg(sg_0),
.scout(ex3_pass_so),
.scin(ex3_pass_si),
//-----------------
.din({ ex2_fsel_bsel,
ex2_pass_sign,
ex2_pass_frac[0:52],
ex2_b_den_flush,
ex2_lu_den_recip,
ex2_lu_den_rsqrto,
ex2_uc_a_expo_den,
ex2_uc_a_expo_den_sp,
ex2_a_party_chick,
ex2_c_party_chick,
ex2_b_party_chick,
ex2_ae_ge_54,
ex2_be_ge_54,
ex2_be_ge_2,
ex2_be_ge_2044,
ex2_aembex_g4[0],
ex2_aembex_t4[0],
ex2_aembex_g4[1],
ex2_aembex_t4[1],
ex2_aembex_g4[2],
ex2_aembey_g4[0],
ex2_aembey_t4[0],
ex2_aembey_g4[1],
ex2_aembey_t4[1],
ex2_aembey_g4[2],
ex2_aembex_sgn,
ex2_aembey_sgn,
ex2_be_den}),
//-----------------
.dout({ ex3_fsel_bsel,
ex3_pass_sign,
ex3_pass_frac[0:52],
ex3_b_den_flush,
ex3_lu_den_recip,
ex3_lu_den_rsqrto,
ex3_uc_a_expo_den,
ex3_uc_a_expo_den_sp,
ex3_a_party_chick,
ex3_c_party_chick,
ex3_b_party_chick,
ex3_ae_ge_54,
ex3_be_ge_54,
ex3_be_ge_2,
ex3_be_ge_2044,
ex3_aembex_g4[0],
ex3_aembex_t4[0],
ex3_aembex_g4[1],
ex3_aembex_t4[1],
ex3_aembex_g4[2],
ex3_aembey_g4[0],
ex3_aembey_t4[0],
ex3_aembey_g4[1],
ex3_aembey_t4[1],
ex3_aembey_g4[2],
ex3_aembex_sgn,
ex3_aembey_sgn,
ex3_be_den})
);
assign f_fmt_ex3_be_den = ex3_be_den ;
assign f_mad_ex3_a_parity_check = ex3_a_party_chick; //output--
assign f_mad_ex3_c_parity_check = ex3_c_party_chick; //output--
assign f_mad_ex3_b_parity_check = ex3_b_party_chick; //output--
assign f_mad_ex3_uc_a_expo_den = ex3_uc_a_expo_den;
assign f_mad_ex3_uc_a_expo_den_sp = ex3_uc_a_expo_den_sp;
assign f_ex3_b_den_flush = ex3_b_den_flush;
assign f_fmt_ex3_fsel_bsel = ex3_fsel_bsel; //output--
assign f_fmt_ex3_pass_sign = ex3_pass_sign; //output--
assign f_fmt_ex3_pass_msb = ex3_pass_frac[1]; //output--
assign ex3_pass_dp[0:52] = ex3_pass_frac[0:52];
assign f_fmt_ex3_pass_frac[0:52] = ex3_pass_dp[0:52]; //output--
// -- shift 26 positions for SP
// -- if expo is very small in dp format, <invalid sp operand>
// -- the lzo will shift 0
// -- this leaves room so [0:23]G,X are all zero.
// -- could use shift 24 , if invalid sp op forces a NAN.
//
assign ex3_aembex_g8[0] = ex3_aembex_g4[0] | (ex3_aembex_t4[0] & ex3_aembex_g4[1]);
assign ex3_aembex_g8[1] = ex3_aembex_g4[2];
assign ex3_aembex_t8[0] = (ex3_aembex_t4[0] & ex3_aembex_t4[1]);
assign ex3_aembex_c2 = ex3_aembex_g8[0] | (ex3_aembex_t8[0] & ex3_aembex_g8[1]);
assign ex3_aembey_g8[0] = ex3_aembey_g4[0] | (ex3_aembey_t4[0] & ex3_aembey_g4[1]);
assign ex3_aembey_g8[1] = ex3_aembey_g4[2];
assign ex3_aembey_t8[0] = (ex3_aembey_t4[0] & ex3_aembey_t4[1]);
assign ex3_aembey_c2 = ex3_aembey_g8[0] | (ex3_aembey_t8[0] & ex3_aembey_g8[1]);
assign ex3_aembex_res_sgn = ex3_aembex_c2 ^ ex3_aembex_sgn;
assign ex3_aembey_res_sgn = ex3_aembey_c2 ^ ex3_aembey_sgn;
//output-- -- were the results positive or negative
// ae - be -1023 >= 0, ae + !be + 1 - 1023 set if positive
assign f_fmt_ex3_tdiv_rng_chk = ((~ex3_aembex_res_sgn)) | (ex3_aembey_res_sgn); // !(ae - be +1022 >= 0) , !(ae + !be + 1 + 1020) set if negtive
assign f_fmt_ex3_ae_ge_54 = ex3_ae_ge_54; //output--
assign f_fmt_ex3_be_ge_54 = ex3_be_ge_54; //output--
assign f_fmt_ex3_be_ge_2 = ex3_be_ge_2; //output--
assign f_fmt_ex3_be_ge_2044 = ex3_be_ge_2044; //output--
//#=##############################################################
//# ex3 logic
//#=##############################################################
//#=##############################################################
//# scan string
//#=##############################################################
assign ex2_ctl_si[0:8] = {ex2_ctl_so[1:8], f_fmt_si};
assign ex3_pass_si[0:79] = {ex3_pass_so[1:79], ex2_ctl_so[0]};
assign act_si[0:6] = {act_so[1:6], ex3_pass_so[0]};
assign f_fmt_so = act_so[0];
endmodule