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a2o/dev/verilog/work/fu_gst.v

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// © 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
//==##########################################################################
//==### FU_GST.VHDL #########
//==### side pipe for graphics estimates #########
//==### flogefp, fexptefp #########
//==### #########
//==##########################################################################
module fu_gst(
vdd,
gnd,
clkoff_b,
act_dis,
flush,
delay_lclkr,
mpw1_b,
mpw2_b,
sg_1,
thold_1,
fpu_enable,
nclk,
f_gst_si,
f_gst_so,
ex1_act,
f_fmt_ex2_b_sign_gst,
f_fmt_ex2_b_expo_gst_b,
f_fmt_ex2_b_frac_gst,
f_pic_ex2_floges,
f_pic_ex2_fexptes,
f_gst_ex6_logexp_v,
f_gst_ex6_logexp_sign,
f_gst_ex6_logexp_exp,
f_gst_ex6_logexp_fract
);
`include "tri_a2o.vh"
inout vdd;
inout gnd;
input clkoff_b; // tiup
input act_dis; // ??tidn??
input flush; // ??tidn??
input [2:5] delay_lclkr; // tidn,
input [2:5] mpw1_b; // tidn,
input [0:1] mpw2_b; // tidn,
input sg_1;
input thold_1;
input fpu_enable; //dc_act
input [0:`NCLK_WIDTH-1] nclk;
//--------------------------------------------------------------------------
//
input f_gst_si; //perv scan
output f_gst_so; //perv scan
input ex1_act;
//--------------------------------------------------------------------------
input f_fmt_ex2_b_sign_gst;
input [01:13] f_fmt_ex2_b_expo_gst_b;
input [01:19] f_fmt_ex2_b_frac_gst;
//--------------------------------------------------------------------------
input f_pic_ex2_floges;
input f_pic_ex2_fexptes;
//--------------------------------------------------------------------------
output f_gst_ex6_logexp_v;
output f_gst_ex6_logexp_sign; // needs to be right off of a latch
output [01:11] f_gst_ex6_logexp_exp; // needs to be right off of a latch
output [00:19] f_gst_ex6_logexp_fract; // needs to be right off of a latch
//--------------------------------------------------------------------------
//==################################################
parameter tiup = 1'b1;
parameter tidn = 1'b0;
wire sg_0;
wire thold_0_b;
wire thold_0;
wire force_t;
//----------------------------------------------------------------------
wire [0:1] ex3_gst_ctrl_lat_scout;
wire [0:1] ex3_gst_ctrl_lat_scin;
wire [0:1] ex4_gst_ctrl_lat_scout;
wire [0:1] ex4_gst_ctrl_lat_scin;
wire [0:3] ex5_gst_ctrl_lat_scout;
wire [0:3] ex5_gst_ctrl_lat_scin;
wire [0:1] ex6_gst_ctrl_lat_scout;
wire [0:1] ex6_gst_ctrl_lat_scin;
wire [0:32] ex3_gst_stage_lat_scout;
wire [0:32] ex3_gst_stage_lat_scin;
wire [0:19] ex4_gst_stage_lat_scout;
wire [0:19] ex4_gst_stage_lat_scin;
wire [0:23] ex5_gst_stage_lat_scout;
wire [0:23] ex5_gst_stage_lat_scin;
wire [0:31] ex6_gst_stage_lat_scout;
wire [0:31] ex6_gst_stage_lat_scin;
wire [1:11] ex5_log_dp_bias;
wire ex5_logof1_specialcase;
wire ex4_logof1_specialcase;
wire ex5_signbit_din;
wire ex6_signbit;
wire ex5_log_signbit;
wire f1;
wire f2;
wire f3;
wire f4;
wire f5;
wire f6;
wire f7;
wire f8;
wire f9;
wire f10;
wire s1;
wire s2;
wire s3;
wire c4;
wire c5;
wire c6;
wire c7;
wire a4;
wire a5;
wire a6;
wire a7;
wire a8;
wire a9;
wire a10;
wire a11;
wire [1:11] ex3_f;
wire [4:11] ex3_a;
wire [4:11] ex3_c;
wire [4:7] ex3_log_fsum;
wire [3:6] ex3_log_fcarryin;
wire ex3_b_sign;
wire [1:13] ex3_b_biased_13exp;
wire [1:11] ex3_b_biased_11exp;
wire [1:11] ex3_b_ubexp_sum;
wire [2:11] ex3_b_ubexp_cout;
wire [1:11] ex3_b_ubexp;
wire [1:19] ex3_b_fract;
wire [1:13] f_fmt_ex2_b_expo_gst;
wire ex2_floges;
wire ex2_fexptes;
wire ex3_floges;
wire ex3_fexptes;
wire ex4_floges;
wire ex4_fexptes;
wire ex5_floges;
wire ex5_fexptes;
wire ex6_floges;
wire ex6_fexptes;
wire [1:11] ex3_log_a_addend_b;
wire [1:11] ex3_log_b_addend_b;
wire [1:19] ex4_mantissa;
wire [1:19] ex5_mantissa;
wire [1:19] ex4_mantissa_precomp;
wire [1:19] ex4_mantissa_precomp_b;
wire [1:19] ex3_log_mantissa_precomp;
wire [1:19] ex4_mantissa_neg;
wire [1:19] ex3_mantissa_din;
wire [0:4] ex3_shamt;
wire [0:4] ex4_shamt;
wire [0:4] ex5_shamt;
wire ex4_negate;
wire ex5_negate;
wire ex4_b_sign;
wire [00:19] ex3_mantissa_shlev0;
wire [00:22] ex3_mantissa_shlev1; // 0 to 3
wire [00:34] ex3_mantissa_shlev2; // 0 to 12
wire [00:50] ex3_mantissa_shlev3; // 0 to 16
wire [1:8] ex3_pow_int;
wire [1:11] ex3_pow_frac;
wire [01:19] ex5_mantissa_shlev0;
wire [01:22] ex5_mantissa_shlev1; // 0 to 3
wire [01:34] ex5_mantissa_shlev2; // 0 to 12
wire [01:50] ex5_mantissa_shlev3; // 0 to 16
wire [01:11] ex5_exponent_a_addend_b;
wire [01:11] ex5_exponent_b_addend_b;
wire [01:11] ex5_log_a_addend_b;
wire [01:11] ex5_log_b_addend_b;
wire [01:11] ex5_pow_a_addend_b;
wire [01:11] ex5_pow_b_addend_b;
wire [01:11] ex5_biased_exponent_result;
wire [01:11] ex6_biased_exponent_result;
wire [01:19] ex5_log_mantissa_postsh;
wire [01:19] ex5_log_fract;
wire [01:11] ex5_pow_fract;
wire [01:11] ex5_pow_fract_b;
wire [00:19] ex5_fract_din;
wire [00:19] ex6_fract;
wire l1_enc00;
wire l1_enc01;
wire l1_enc10;
wire l1_enc11;
wire l2_enc00;
wire l2_enc01;
wire l2_enc10;
wire l2_enc11;
wire l3_enc00;
wire l3_enc01;
wire l1_e00;
wire l1_e01;
wire l1_e10;
wire l1_e11;
wire l2_e00;
wire l2_e01;
wire l2_e10;
wire l2_e11;
wire l3_e00;
wire l3_e01;
wire [01:11] ex5_f;
wire [01:11] ex5_f_b;
//----------------------------------------------------------------------
wire eb1; //, eb11
wire eb2;
wire eb3;
wire eb4;
wire eb5;
wire eb6;
wire eb7;
wire eb8;
wire eb9;
wire eb10;
wire ea4;
wire ea5;
wire ea6;
wire ea7;
wire ea8;
wire ea9;
wire ea10;
wire ea11;
wire ec4;
wire ec5;
wire ec6;
wire ec7;
wire es1;
wire es2;
wire es3;
wire [4:11] ex5_ea;
wire [4:11] ex5_ec;
wire [1:11] ex5_addend1;
wire [1:11] ex5_addend2;
wire [1:11] ex5_addend3;
wire [1:11] ex5_fsum;
wire [1:11] ex5_fcarryin;
wire [1:11] ex5_powf_a_addend_b;
wire [1:11] ex5_powf_b_addend_b;
wire [01:16] zeros;
wire ex3_powsh_no_sat_lft;
wire ex3_powsh_no_sat_rgt;
wire ex2_act;
wire ex3_act;
wire ex4_act;
wire ex5_act;
wire [0:7] act_so;
wire [0:7] act_si;
(* analysis_not_referenced="TRUE" *)
wire [0:3] act_spare_unused;
(* analysis_not_referenced="TRUE" *)
wire unused;
wire [2:11] ex3_ube_g2_b;
wire [2:11] ex3_ube_g4;
wire [2:11] ex3_ube_g8_b;
wire s2_0;
wire s2_1;
wire s3_0;
wire s3_1;
wire sx;
wire s7_if_s1;
wire s7_if_s20;
wire s7_if_s30;
wire s7_if_sx;
wire s7_if_s31;
wire s7_if_s21;
wire c6_if_s1;
wire c6_if_s20;
wire c6_if_s30;
wire c6_if_sx;
wire c6_if_s31;
wire c6_if_s21;
wire s6_if_s1;
wire s6_if_s20;
wire s6_if_s30;
wire s6_if_sx;
wire s6_if_s31;
wire s6_if_s21;
wire c5_if_s1;
wire c5_if_s20;
wire c5_if_s30;
wire c5_if_sx;
wire c5_if_s31;
wire c5_if_s21;
wire s5_if_s1;
wire s5_if_s20;
wire s5_if_s30;
wire s5_if_sx;
wire s5_if_s31;
wire s5_if_s21;
wire c4_if_s1;
wire c4_if_s20;
wire c4_if_s30;
wire c4_if_sx;
wire c4_if_s31;
wire c4_if_s21;
wire s4_if_s1;
wire s4_if_s20;
wire s4_if_s30;
wire s4_if_sx;
wire s4_if_s31;
wire s4_if_s21;
wire c3_if_s1;
wire c3_if_s20;
wire c3_if_s30;
wire c3_if_sx;
wire c3_if_s31;
wire c3_if_s21;
wire es4_if_s1;
wire es4_if_s20;
wire es4_if_s30;
wire es4_if_sx;
wire es4_if_s31;
wire es4_if_s21;
wire ec3_if_s1;
wire ec3_if_s20;
wire ec3_if_s30;
wire ec3_if_sx;
wire ec3_if_s31;
wire ec3_if_s21;
wire es5_if_s1;
wire es5_if_s20;
wire es5_if_s30;
wire es5_if_sx;
wire es5_if_s31;
wire es5_if_s21;
wire ec4_if_s1;
wire ec4_if_s20;
wire ec4_if_s30;
wire ec4_if_sx;
wire ec4_if_s31;
wire ec4_if_s21;
wire es6_if_s1;
wire es6_if_s20;
wire es6_if_s30;
wire es6_if_sx;
wire es6_if_s31;
wire es6_if_s21;
wire ec5_if_s1;
wire ec5_if_s20;
wire ec5_if_s30;
wire ec5_if_sx;
wire ec5_if_s31;
wire ec5_if_s21;
wire es7_if_s1;
wire es7_if_s20;
wire es7_if_s30;
wire es7_if_sx;
wire es7_if_s31;
wire es7_if_s21;
wire ec6_if_s1;
wire ec6_if_s20;
wire ec6_if_s30;
wire ec6_if_sx;
wire ec6_if_s31;
wire ec6_if_s21;
wire es2_0;
wire es2_1;
wire esx;
wire es3_0;
wire es3_1;
//==##########################################
//# pervasive
//==##########################################
assign unused = ex3_b_biased_13exp[1] | ex3_b_biased_13exp[2] | ex3_b_ubexp[2] | ex3_b_ubexp[3] |
ex3_mantissa_shlev3[0] | ex3_mantissa_shlev3[1] | ex3_mantissa_shlev3[2] | ex3_mantissa_shlev3[3] |
ex3_mantissa_shlev3[4] | ex3_mantissa_shlev3[5] | ex3_mantissa_shlev3[6] | ex3_mantissa_shlev3[7] |
ex3_mantissa_shlev3[27] | ex3_mantissa_shlev3[28] | ex3_mantissa_shlev3[29] | ex3_mantissa_shlev3[30] |
ex3_mantissa_shlev3[31] | ex3_mantissa_shlev3[32] | ex3_mantissa_shlev3[33] | ex3_mantissa_shlev3[34] |
ex3_mantissa_shlev3[35] | ex3_mantissa_shlev3[36] | ex3_mantissa_shlev3[37] | ex3_mantissa_shlev3[38] |
ex3_mantissa_shlev3[39] | ex3_mantissa_shlev3[40] | ex3_mantissa_shlev3[41] | ex3_mantissa_shlev3[42] |
ex3_mantissa_shlev3[43] | ex3_mantissa_shlev3[44] | ex3_mantissa_shlev3[45] | ex3_mantissa_shlev3[46] |
ex3_mantissa_shlev3[47] | ex3_mantissa_shlev3[48] | ex3_mantissa_shlev3[49] | ex3_mantissa_shlev3[50] |
|(ex5_mantissa_shlev3[1:31]) |
|( ex3_a[4:7] ) |
|( ex3_c[4:11] ) |
|( ex5_addend1[1:11] ) |
|( ex5_addend2[1:11] ) |
|( ex5_addend3[1:11] ) |
s2 |
s3 |
es2 |
es3 ;
tri_plat thold_reg_0(
.vd(vdd),
.gd(gnd),
.nclk(nclk),
.flush(flush),
.din(thold_1),
.q(thold_0)
);
tri_plat sg_reg_0(
.vd(vdd),
.gd(gnd),
.nclk(nclk),
.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)
);
//==##########################################
tri_rlmreg_p #(.WIDTH(8), .NEEDS_SRESET(0)) act_lat(
.force_t(force_t),
.d_mode(tiup),
.delay_lclkr(delay_lclkr[4]),
.mpw1_b(mpw1_b[4]),
.mpw2_b(mpw2_b[0]),
.vd(vdd),
.gd(gnd),
.nclk(nclk),
.act(fpu_enable),
.thold_b(thold_0_b),
.sg(sg_0),
.scout(act_so),
.scin(act_si),
//-----------------
.din({act_spare_unused[0],
act_spare_unused[1],
ex1_act,
ex2_act,
ex3_act,
ex4_act,
act_spare_unused[2],
act_spare_unused[3]}),
//-----------------
.dout({act_spare_unused[0],
act_spare_unused[1],
ex2_act,
ex3_act,
ex4_act,
ex5_act,
act_spare_unused[2],
act_spare_unused[3]})
);
//==##########################################
assign zeros = {16{tidn}};
assign ex2_floges = f_pic_ex2_floges;
assign ex2_fexptes = f_pic_ex2_fexptes;
//---------------------------------------------------------------------
tri_rlmreg_p #( .WIDTH(2), .NEEDS_SRESET(0)) ex3_gst_ctrl_lat(
.force_t(force_t), //d_mode => tiup, delay_lclkr => tidn,
.d_mode(tiup),
.delay_lclkr(delay_lclkr[2]),
.mpw1_b(mpw1_b[2]),
.mpw2_b(mpw2_b[0]),
.vd(vdd),
.gd(gnd),
.nclk(nclk),
.thold_b(thold_0_b),
.sg(sg_0),
//-----------------
.act(ex2_act),
//-----------------
.scout(ex3_gst_ctrl_lat_scout),
.scin(ex3_gst_ctrl_lat_scin),
//-----------------
.din({ex2_floges,
ex2_fexptes}),
//-----------------
.dout({ex3_floges,
ex3_fexptes})
);
//---------------------------------------------------------------------
//----------------------------------------------------------------------
//----------------------------------------------------------------------
assign f_fmt_ex2_b_expo_gst = (~f_fmt_ex2_b_expo_gst_b);
//---------------------------------------------------------------------
tri_rlmreg_p #( .WIDTH(33), .NEEDS_SRESET(0)) ex3_gst_stage_lat(
.force_t(force_t), //d_mode => tiup, delay_lclkr => tidn,
.d_mode(tiup),
.delay_lclkr(delay_lclkr[2]),
.mpw1_b(mpw1_b[2]),
.mpw2_b(mpw2_b[0]),
.vd(vdd),
.gd(gnd),
.nclk(nclk),
.thold_b(thold_0_b),
.sg(sg_0),
//-----------------
.act(ex2_act),
//-----------------
.scout(ex3_gst_stage_lat_scout),
.scin(ex3_gst_stage_lat_scin),
//-----------------
.din({f_fmt_ex2_b_sign_gst,
f_fmt_ex2_b_expo_gst,
f_fmt_ex2_b_frac_gst}),
//-----------------
.dout({ex3_b_sign,
ex3_b_biased_13exp,
ex3_b_fract})
);
//******************************************************************************
//* LOG ESTIMATE CALCULATION, FRACTIONAL PORTION
//******************************************************************************
assign ex3_f[1:11] = ex3_b_fract[1:11];
assign f1 = ex3_f[1];
assign f2 = ex3_f[2];
assign f3 = ex3_f[3];
assign f4 = ex3_f[4];
assign f5 = ex3_f[5];
assign f6 = ex3_f[6];
assign f7 = ex3_f[7];
assign f8 = ex3_f[8];
assign f9 = ex3_f[9];
assign f10 = ex3_f[10];
assign s1 = ((~f1) & (~f2) & (~f3) & (~f4)); //0
//1
assign s2_0 = ((~f1) & (~f2) & (~f3) & f4) | ((~f1) & (~f2) & f3 & (~f4)); //2
//3
assign s3_0 = ((~f1) & (~f2) & f3 & f4) | ((~f1) & f2 & (~f3)); //4,5
//6,7
assign sx = ((~f1) & f2 & f3) | (f1 & (~f2) & (~f3) & (~f4)); //8
//9
assign s3_1 = (f1 & (~f2) & (~f3) & f4) | (f1 & (~f2) & f3); //10,11
assign s2_1 = (f1 & f2); //12,13,14,15
assign s2 = s2_0 | s2_1;
assign s3 = s3_0 | s3_1;
//------------------------------------------------------------------------------
assign c4 = sx;
assign c5 = s3_0 | s3_1;
assign c6 = sx | s2_0;
assign c7 = sx | s3_0;
assign a4 = (s1 & f3) | (s2_0 & f2) | (s2_1 & (~f2));
assign a5 = (s1 & f4) | (s2_0 & f3) | (s2_1 & (~f3)) | (s3_0 & f2) | (s3_1 & (~f2));
assign a6 = (s1 & f5) | (s2_0 & f4) | (s2_1 & (~f4)) | (s3_0 & f3) | (s3_1 & (~f3));
assign a7 = (s1 & f6) | (s2_0 & f5) | (s2_1 & (~f5)) | (s3_0 & f4) | (s3_1 & (~f4));
assign a8 = (s1 & f7) | (s2_0 & f6) | (s2_1 & (~f6)) | (s3_0 & f5) | (s3_1 & (~f5));
assign a9 = (s1 & f8) | (s2_0 & f7) | (s2_1 & (~f7)) | (s3_0 & f6) | (s3_1 & (~f6));
assign a10 = (s1 & f9) | (s2_0 & f8) | (s2_1 & (~f8)) | (s3_0 & f7) | (s3_1 & (~f7));
assign a11 = (s1 & f10) | (s2_0 & f9) | (s2_1 & (~f9)) | (s3_0 & f8) | (s3_1 & (~f8));
//------------------------------------------------------------------------------
assign ex3_a[4:11] = {a4, a5, a6, a7, a8, a9, a10, a11};
assign ex3_c[4:11] = {c4, c5, c6, c7, tidn, tidn, tidn, tidn};
//------------------------------------------------------------------------------
// 3 to 2 compressor
//------------------------------------------------------------------------------
assign c3_if_s1 = f4 & f3;
assign c3_if_s20 = f4 & f2;
assign c3_if_s30 = tidn;
assign c3_if_sx = f4;
assign c3_if_s31 = tidn;
assign c3_if_s21 = f4 & (~f2);
assign s4_if_s1 = f4 ^ f3;
assign s4_if_s20 = f4 ^ f2;
assign s4_if_s30 = f4;
assign s4_if_sx = (~f4);
assign s4_if_s31 = f4;
assign s4_if_s21 = f4 ^ (~f2);
assign c4_if_s1 = f5 & f4;
assign c4_if_s20 = f5 & f3;
assign c4_if_s30 = f5 | f2;
assign c4_if_sx = tidn;
assign c4_if_s31 = f5 | (~f2);
assign c4_if_s21 = f5 & (~f3);
assign s5_if_s1 = f5 ^ f4;
assign s5_if_s20 = f5 ^ f3;
assign s5_if_s30 = f5 ^ (~f2);
assign s5_if_sx = f5;
assign s5_if_s31 = f5 ^ f2;
assign s5_if_s21 = f5 ^ (~f3);
assign c5_if_s1 = f6 & f5;
assign c5_if_s20 = f6 | f4;
assign c5_if_s30 = f6 & f3;
assign c5_if_sx = f6;
assign c5_if_s31 = f6 & (~f3);
assign c5_if_s21 = f6 & (~f4);
assign s6_if_s1 = f6 ^ f5;
assign s6_if_s20 = f6 ^ (~f4);
assign s6_if_s30 = f6 ^ f3;
assign s6_if_sx = (~f6);
assign s6_if_s31 = f6 ^ (~f3);
assign s6_if_s21 = f6 ^ (~f4);
assign c6_if_s1 = f7 & f6;
assign c6_if_s20 = f7 & f5;
assign c6_if_s30 = f7 | f4;
assign c6_if_sx = f7;
assign c6_if_s31 = f7 & (~f4);
assign c6_if_s21 = f7 & (~f5);
assign s7_if_s1 = f7 ^ f6;
assign s7_if_s20 = f7 ^ f5;
assign s7_if_s30 = f7 ^ (~f4);
assign s7_if_sx = (~f7);
assign s7_if_s31 = f7 ^ (~f4);
assign s7_if_s21 = f7 ^ (~f5);
assign ex3_log_fsum[4] = (s1 & s4_if_s1) | (s2_0 & s4_if_s20) | (s3_0 & s4_if_s30) | (sx & s4_if_sx) | (s3_1 & s4_if_s31) | (s2_1 & s4_if_s21);
assign ex3_log_fcarryin[3] = (s1 & c3_if_s1) | (s2_0 & c3_if_s20) | (s3_0 & c3_if_s30) | (sx & c3_if_sx) | (s3_1 & c3_if_s31) | (s2_1 & c3_if_s21);
assign ex3_log_fsum[5] = (s1 & s5_if_s1) | (s2_0 & s5_if_s20) | (s3_0 & s5_if_s30) | (sx & s5_if_sx) | (s3_1 & s5_if_s31) | (s2_1 & s5_if_s21);
assign ex3_log_fcarryin[4] = (s1 & c4_if_s1) | (s2_0 & c4_if_s20) | (s3_0 & c4_if_s30) | (sx & c4_if_sx) | (s3_1 & c4_if_s31) | (s2_1 & c4_if_s21);
assign ex3_log_fsum[6] = (s1 & s6_if_s1) | (s2_0 & s6_if_s20) | (s3_0 & s6_if_s30) | (sx & s6_if_sx) | (s3_1 & s6_if_s31) | (s2_1 & s6_if_s21);
assign ex3_log_fcarryin[5] = (s1 & c5_if_s1) | (s2_0 & c5_if_s20) | (s3_0 & c5_if_s30) | (sx & c5_if_sx) | (s3_1 & c5_if_s31) | (s2_1 & c5_if_s21);
assign ex3_log_fsum[7] = (s1 & s7_if_s1) | (s2_0 & s7_if_s20) | (s3_0 & s7_if_s30) | (sx & s7_if_sx) | (s3_1 & s7_if_s31) | (s2_1 & s7_if_s21);
assign ex3_log_fcarryin[6] = (s1 & c6_if_s1) | (s2_0 & c6_if_s20) | (s3_0 & c6_if_s30) | (sx & c6_if_sx) | (s3_1 & c6_if_s31) | (s2_1 & c6_if_s21);
assign ex3_log_a_addend_b[1] = (~(ex3_f[1]));
assign ex3_log_a_addend_b[2] = (~(ex3_f[2]));
assign ex3_log_a_addend_b[3] = (~(ex3_f[3]));
assign ex3_log_a_addend_b[4] = (~(ex3_log_fsum[4]));
assign ex3_log_a_addend_b[5] = (~(ex3_log_fsum[5]));
assign ex3_log_a_addend_b[6] = (~(ex3_log_fsum[6]));
assign ex3_log_a_addend_b[7] = (~(ex3_log_fsum[7]));
assign ex3_log_a_addend_b[8] = (~(ex3_f[8]));
assign ex3_log_a_addend_b[9] = (~(ex3_f[9]));
assign ex3_log_a_addend_b[10] = (~(ex3_f[10]));
assign ex3_log_a_addend_b[11] = (~(ex3_f[11]));
assign ex3_log_b_addend_b[1] = (~(tidn));
assign ex3_log_b_addend_b[2] = (~(tidn));
assign ex3_log_b_addend_b[3] = (~(ex3_log_fcarryin[3]));
assign ex3_log_b_addend_b[4] = (~(ex3_log_fcarryin[4]));
assign ex3_log_b_addend_b[5] = (~(ex3_log_fcarryin[5]));
assign ex3_log_b_addend_b[6] = (~(ex3_log_fcarryin[6]));
assign ex3_log_b_addend_b[7] = (~(tidn));
assign ex3_log_b_addend_b[8] = (~(ex3_a[8]));
assign ex3_log_b_addend_b[9] = (~(ex3_a[9]));
assign ex3_log_b_addend_b[10] = (~(ex3_a[10]));
assign ex3_log_b_addend_b[11] = (~(ex3_a[11]));
//------------------------------------------------------------------------------
// unbias the exponent
//------------------------------------------------------------------------------
// bias is DP, so subtract 1023
assign ex3_b_biased_11exp[1:11] = ex3_b_biased_13exp[3:13];
// add -1023 (10000000001)
assign ex3_b_ubexp_sum[01] = (~ex3_b_biased_11exp[01]);
assign ex3_b_ubexp_sum[02:10] = ex3_b_biased_11exp[02:10];
assign ex3_b_ubexp_sum[11] = (~ex3_b_biased_11exp[11]);
assign ex3_ube_g2_b[11] = (~(ex3_b_biased_11exp[11]));
assign ex3_ube_g2_b[10] = (~(ex3_b_biased_11exp[10] & ex3_b_biased_11exp[11]));
assign ex3_ube_g2_b[9] = (~(ex3_b_biased_11exp[9] & ex3_b_biased_11exp[10]));
assign ex3_ube_g2_b[8] = (~(ex3_b_biased_11exp[8] & ex3_b_biased_11exp[9]));
assign ex3_ube_g2_b[7] = (~(ex3_b_biased_11exp[7] & ex3_b_biased_11exp[8]));
assign ex3_ube_g2_b[6] = (~(ex3_b_biased_11exp[6] & ex3_b_biased_11exp[7]));
assign ex3_ube_g2_b[5] = (~(ex3_b_biased_11exp[5] & ex3_b_biased_11exp[6]));
assign ex3_ube_g2_b[4] = (~(ex3_b_biased_11exp[4] & ex3_b_biased_11exp[5]));
assign ex3_ube_g2_b[3] = (~(ex3_b_biased_11exp[3] & ex3_b_biased_11exp[4]));
assign ex3_ube_g2_b[2] = (~(ex3_b_biased_11exp[2] & ex3_b_biased_11exp[3]));
assign ex3_ube_g4[11] = (~(ex3_ube_g2_b[11]));
assign ex3_ube_g4[10] = (~(ex3_ube_g2_b[10]));
assign ex3_ube_g4[9] = (~(ex3_ube_g2_b[9] | ex3_ube_g2_b[11]));
assign ex3_ube_g4[8] = (~(ex3_ube_g2_b[8] | ex3_ube_g2_b[10]));
assign ex3_ube_g4[7] = (~(ex3_ube_g2_b[7] | ex3_ube_g2_b[9]));
assign ex3_ube_g4[6] = (~(ex3_ube_g2_b[6] | ex3_ube_g2_b[8]));
assign ex3_ube_g4[5] = (~(ex3_ube_g2_b[5] | ex3_ube_g2_b[7]));
assign ex3_ube_g4[4] = (~(ex3_ube_g2_b[4] | ex3_ube_g2_b[6]));
assign ex3_ube_g4[3] = (~(ex3_ube_g2_b[3] | ex3_ube_g2_b[5]));
assign ex3_ube_g4[2] = (~(ex3_ube_g2_b[2] | ex3_ube_g2_b[4]));
assign ex3_ube_g8_b[11] = (~(ex3_ube_g4[11]));
assign ex3_ube_g8_b[10] = (~(ex3_ube_g4[10]));
assign ex3_ube_g8_b[9] = (~(ex3_ube_g4[9]));
assign ex3_ube_g8_b[8] = (~(ex3_ube_g4[8]));
assign ex3_ube_g8_b[7] = (~(ex3_ube_g4[7] & ex3_ube_g4[11]));
assign ex3_ube_g8_b[6] = (~(ex3_ube_g4[6] & ex3_ube_g4[10]));
assign ex3_ube_g8_b[5] = (~(ex3_ube_g4[5] & ex3_ube_g4[9]));
assign ex3_ube_g8_b[4] = (~(ex3_ube_g4[4] & ex3_ube_g4[8]));
assign ex3_ube_g8_b[3] = (~(ex3_ube_g4[3] & ex3_ube_g4[7]));
assign ex3_ube_g8_b[2] = (~(ex3_ube_g4[2] & ex3_ube_g4[6]));
assign ex3_b_ubexp_cout[11] = (~(ex3_ube_g8_b[11]));
assign ex3_b_ubexp_cout[10] = (~(ex3_ube_g8_b[10]));
assign ex3_b_ubexp_cout[9] = (~(ex3_ube_g8_b[9]));
assign ex3_b_ubexp_cout[8] = (~(ex3_ube_g8_b[8]));
assign ex3_b_ubexp_cout[7] = (~(ex3_ube_g8_b[7]));
assign ex3_b_ubexp_cout[6] = (~(ex3_ube_g8_b[6]));
assign ex3_b_ubexp_cout[5] = (~(ex3_ube_g8_b[5]));
assign ex3_b_ubexp_cout[4] = (~(ex3_ube_g8_b[4]));
assign ex3_b_ubexp_cout[3] = (~(ex3_ube_g8_b[3] | ex3_ube_g8_b[11]));
assign ex3_b_ubexp_cout[2] = (~(ex3_ube_g8_b[2] | ex3_ube_g8_b[10]));
assign ex3_b_ubexp[01:10] = ex3_b_ubexp_sum[01:10] ^ ex3_b_ubexp_cout[02:11];
assign ex3_b_ubexp[11] = ex3_b_ubexp_sum[11];
//------------------------------------------------------------------------------
// not really an 11 bit adder
fu_gst_add11 ex3_logadd11(
.a_b(ex3_log_a_addend_b[1:11]),
.b_b(ex3_log_b_addend_b[1:11]),
//------------------------------------------------------
.s0(ex3_log_mantissa_precomp[9:19])
);
//---------------------------------------------------------------------
assign ex3_log_mantissa_precomp[1:8] = ex3_b_ubexp[4:11];
//----------------------------------------------------------------------------------------------------------------------
// for fexptes, shift mantissa based on the exponent (un-normalize)
assign ex3_mantissa_shlev0[00:19] = {tiup, ex3_b_fract[01:19]};
assign ex3_shamt[0:4] = {ex3_b_ubexp[1], ex3_b_ubexp[08:11]};
//timing note: the shift amount comes after the adder to unbias the exponent.
// it would be faster to use the biased exponent but use the shift controls different.
//
// 1 2 3 4 5 6 7 8 9 A B
// 0 1 1 1 1 1 1 1 1 1 1 bias =1023
// 1 0 0 0 0 0 0 0 0 0 1 add -1023 to unbias
// for small shifts unbiased 01 = biased 00
// for small shifts unbiased 10 = biased 01
// for small shifts unbiased 11 = biased 10
// for small shifts unbiased 00 = biased 11
assign ex3_powsh_no_sat_lft = (~ex3_b_ubexp[2]) & (~ex3_b_ubexp[3]) & (~ex3_b_ubexp[4]) & (~ex3_b_ubexp[5]) & (~ex3_b_ubexp[6]) & (~ex3_b_ubexp[7]);
assign ex3_powsh_no_sat_rgt = ex3_b_ubexp[2] & ex3_b_ubexp[3] & ex3_b_ubexp[4] & ex3_b_ubexp[5] & ex3_b_ubexp[6] & ex3_b_ubexp[7];
assign l1_e00 = (~ex3_shamt[3]) & (~ex3_shamt[4]);
assign l1_e01 = (~ex3_shamt[3]) & ex3_shamt[4];
assign l1_e10 = ex3_shamt[3] & (~ex3_shamt[4]);
assign l1_e11 = ex3_shamt[3] & ex3_shamt[4];
assign l2_e00 = (~ex3_shamt[1]) & (~ex3_shamt[2]);
assign l2_e01 = (~ex3_shamt[1]) & ex3_shamt[2];
assign l2_e10 = ex3_shamt[1] & (~ex3_shamt[2]);
assign l2_e11 = ex3_shamt[1] & ex3_shamt[2];
assign l3_e00 = (~ex3_shamt[0]) & ex3_powsh_no_sat_lft;
assign l3_e01 = ex3_shamt[0] & ex3_powsh_no_sat_rgt; // this means shift Right by 16
assign ex3_mantissa_shlev1[00:22] = ({zeros[01:03], (ex3_mantissa_shlev0[00:19])} & {23{l1_e00}}) |
({zeros[01:02], ({ex3_mantissa_shlev0[00:19], zeros[01]})} & {23{l1_e01}}) |
({zeros[01], ({ex3_mantissa_shlev0[00:19], zeros[01:02]})} & {23{l1_e10}}) |
(({ex3_mantissa_shlev0[00:19], zeros[01:03]}) & {23{l1_e11}});
assign ex3_mantissa_shlev2[00:34] = ({zeros[01:12], (ex3_mantissa_shlev1[00:22])} & {35{l2_e00}}) |
({zeros[01:08], ({ex3_mantissa_shlev1[00:22], zeros[01:04]})} & {35{l2_e01}}) |
({zeros[01:04], ({ex3_mantissa_shlev1[00:22], zeros[01:08]})} & {35{l2_e10}}) |
(({ex3_mantissa_shlev1[00:22], zeros[01:12]}) & {35{l2_e11}});
assign ex3_mantissa_shlev3[00:50] = (({ex3_mantissa_shlev2[00:34], zeros[01:16]}) & {51{l3_e00}}) |
({zeros[01:16], (ex3_mantissa_shlev2[00:34])} & {51{l3_e01}});
assign ex3_pow_int[1:8] = ex3_mantissa_shlev3[08:15];
assign ex3_pow_frac[1:11] = ex3_mantissa_shlev3[16:26];
assign ex3_mantissa_din[1:19] = (({ex3_pow_int[1:8], ex3_pow_frac[1:11]}) & {19{ex3_fexptes}}) |
(ex3_log_mantissa_precomp[1:19] & {19{ex3_floges}});
//---------------------------------------------------------------------
//---------------------------------------------------------------------
//---------------------------------------------------------------------
//---------------------------------------------------------------------
tri_rlmreg_p #( .WIDTH(2), .NEEDS_SRESET(0)) ex4_gst_ctrl_lat(
.force_t(force_t), //d_mode => tiup, delay_lclkr => tidn,
.d_mode(tiup),
.delay_lclkr(delay_lclkr[3]),
.mpw1_b(mpw1_b[3]),
.mpw2_b(mpw2_b[0]),
.vd(vdd),
.gd(gnd),
.nclk(nclk),
.thold_b(thold_0_b),
.sg(sg_0),
//-----------------
.act(ex3_act),
//-----------------
.scout(ex4_gst_ctrl_lat_scout),
.scin(ex4_gst_ctrl_lat_scin),
//-----------------
.din({ex3_floges,
ex3_fexptes}),
//-----------------
.dout({ex4_floges,
ex4_fexptes})
);
//---------------------------------------------------------------------
tri_rlmreg_p #( .WIDTH(20), .NEEDS_SRESET(0)) ex4_gst_stage_lat(
.force_t(force_t), //d_mode => tiup, delay_lclkr => tidn,
.d_mode(tiup),
.delay_lclkr(delay_lclkr[3]),
.mpw1_b(mpw1_b[3]),
.mpw2_b(mpw2_b[0]),
.vd(vdd),
.gd(gnd),
.nclk(nclk),
.thold_b(thold_0_b),
.sg(sg_0),
//-----------------
.act(ex3_act),
//-----------------
.scout(ex4_gst_stage_lat_scout),
.scin(ex4_gst_stage_lat_scin),
//-----------------
.din({ex3_mantissa_din,
ex3_b_sign}),
//-----------------
.dout({ex4_mantissa_precomp,
ex4_b_sign})
);
//---------------------------------------------------------------------
//---------------------------------------------------------------------
//---------------------------------------------------------------------
assign ex4_mantissa_precomp_b = (~ex4_mantissa_precomp[1:19]);
//---------------------------------------------------------------------
fu_gst_inc19 ex4_log_inc(
.a(ex4_mantissa_precomp_b[1:19]),
//------------------------------------------------------
.o(ex4_mantissa_neg[1:19])
);
//---------------------------------------------------------------------
assign ex4_negate = (ex4_mantissa_precomp[1] & ex4_floges) |
(ex4_fexptes & ex4_b_sign);
assign ex4_mantissa[1:19] = (ex4_mantissa_neg[1:19] & {19{ex4_negate}}) |
(ex4_mantissa_precomp[1:19] & {19{(~ex4_negate)}});
//---------------------------------------------------------------------
fu_gst_loa ex4_log_loa(
.a(ex4_mantissa),
//------------------------------------------------------
.shamt(ex4_shamt[0:4])
);
//---------------------------------------------------------------------
assign ex4_logof1_specialcase = (~|(ex4_shamt[0:4]));
//---------------------------------------------------------------------
tri_rlmreg_p #( .WIDTH(4), .NEEDS_SRESET(0)) ex5_gst_ctrl_lat(
.force_t(force_t), //d_mode => tiup, delay_lclkr => tidn,
.d_mode(tiup),
.delay_lclkr(delay_lclkr[4]),
.mpw1_b(mpw1_b[4]),
.mpw2_b(mpw2_b[0]),
.vd(vdd),
.gd(gnd),
.nclk(nclk),
.thold_b(thold_0_b),
.sg(sg_0),
//-----------------
.act(ex4_act),
//-----------------
.scout(ex5_gst_ctrl_lat_scout),
.scin(ex5_gst_ctrl_lat_scin),
//-----------------
.din({ex4_floges,
ex4_fexptes,
ex4_negate,
ex4_logof1_specialcase}),
//-----------------
.dout({ex5_floges,
ex5_fexptes,
ex5_negate,
ex5_logof1_specialcase})
);
tri_rlmreg_p #( .WIDTH(24), .NEEDS_SRESET(0)) ex5_gst_stage_lat(
.force_t(force_t), //d_mode => tiup, delay_lclkr => tidn,
.d_mode(tiup),
.delay_lclkr(delay_lclkr[4]),
.mpw1_b(mpw1_b[4]),
.mpw2_b(mpw2_b[0]),
.vd(vdd),
.gd(gnd),
.nclk(nclk),
.thold_b(thold_0_b),
.sg(sg_0),
//-----------------
.act(ex4_act),
//-----------------
.scout(ex5_gst_stage_lat_scout),
.scin(ex5_gst_stage_lat_scin),
//-----------------
.din({ex4_mantissa,
ex4_shamt}),
//-----------------
.dout({ex5_mantissa,
ex5_shamt})
);
//---------------------------------------------------------------------
//---------------------------------------------------------------------
//---------------------------------------------------------------------
// shift mantissa for log (shamt is set to zeros for exp)
// log mantissa gets normalized here
assign ex5_mantissa_shlev0[01:19] = ex5_mantissa[01:19];
assign l1_enc00 = (~ex5_shamt[3]) & (~ex5_shamt[4]);
assign l1_enc01 = (~ex5_shamt[3]) & ex5_shamt[4];
assign l1_enc10 = ex5_shamt[3] & (~ex5_shamt[4]);
assign l1_enc11 = ex5_shamt[3] & ex5_shamt[4];
assign l2_enc00 = (~ex5_shamt[1]) & (~ex5_shamt[2]);
assign l2_enc01 = (~ex5_shamt[1]) & ex5_shamt[2];
assign l2_enc10 = ex5_shamt[1] & (~ex5_shamt[2]);
assign l2_enc11 = ex5_shamt[1] & ex5_shamt[2];
assign l3_enc00 = (~ex5_shamt[0]);
assign l3_enc01 = ex5_shamt[0];
assign ex5_mantissa_shlev1[01:22] = ({zeros[01:03], (ex5_mantissa_shlev0[01:19])} & {22{l1_enc00}}) |
({zeros[01:02], ({ex5_mantissa_shlev0[01:19], zeros[01]})} & {22{l1_enc01}}) |
({zeros[01], ({ex5_mantissa_shlev0[01:19], zeros[01:02]})} & {22{l1_enc10}}) |
(({ex5_mantissa_shlev0[01:19], zeros[01:03]}) & {22{l1_enc11}});
assign ex5_mantissa_shlev2[01:34] = ({zeros[01:12], (ex5_mantissa_shlev1[01:22])} & {34{l2_enc00}}) |
({zeros[01:08], ({ex5_mantissa_shlev1[01:22], zeros[01:04]})} & {34{l2_enc01}}) |
({zeros[01:04], ({ex5_mantissa_shlev1[01:22], zeros[01:08]})} & {34{l2_enc10}}) |
(({ex5_mantissa_shlev1[01:22], zeros[01:12]}) & {34{l2_enc11}});
assign ex5_mantissa_shlev3[01:50] = ({zeros[01:16], (ex5_mantissa_shlev2[01:34])} & {50{l3_enc00}}) |
(({ex5_mantissa_shlev2[01:34], zeros[01:16]}) & {50{l3_enc01}});
assign ex5_log_mantissa_postsh[01:19] = ex5_mantissa_shlev3[32:50];
//----------------------------------------------------------------------------------------------------------------------
// pow fract logic
assign ex5_f[1:11] = ex5_mantissa[9:19];
// ************************************
// ** vexptefp fract logic
// ************************************
assign eb1 = ex5_f[1];
assign eb2 = ex5_f[2];
assign eb3 = ex5_f[3];
assign eb4 = ex5_f[4];
assign eb5 = ex5_f[5];
assign eb6 = ex5_f[6];
assign eb7 = ex5_f[7];
assign eb8 = ex5_f[8];
assign eb9 = ex5_f[9];
assign eb10 = ex5_f[10];
assign ex5_f_b[1:11] = (~ex5_f[1:11]);
//0000 ^s2
//0001 ^s2
//0010 ^s2
//0011 ^s2
//0100 ^s3
//0101 ^s3
//0110 ^s3
//0111 --
//1000 --
//1001 --
//1010 s3
//1011 s3
//1100 s3
//1101 s2
//1110 s2
//1111 s1
assign es2_0 = ((~eb1) & (~eb2)); //0,1,2,3
//4,5
assign es3_0 = ((~eb1) & eb2 & (~eb3)) | ((~eb1) & eb2 & eb3 & (~eb4)); //6
//7
assign esx = ((~eb1) & eb2 & eb3 & eb4) | (eb1 & (~eb2) & (~eb3)); //8,9
//10,11
assign es3_1 = (eb1 & (~eb2) & eb3) | (eb1 & eb2 & (~eb3) & (~eb4)); //12
//13
assign es2_1 = (eb1 & eb2 & (~eb3) & eb4) | (eb1 & eb2 & eb3 & (~eb4)); //14
assign es1 = (eb1 & eb2 & eb3 & eb4); //15
assign es2 = es2_0 | es2_1;
assign es3 = es3_0 | es3_1;
assign ec4 = esx;
assign ec5 = es3_0 | es3_1;
assign ec6 = esx | es2_1;
assign ec7 = esx | es3_1;
//--------------------------------------------------------------------
// mathematically eliminate the 3:2 compressor <passes verity>
//--------------------------------------------------------------------
//<BIT 4>
// f1234 | 3:2 inputs (f,c,a) | 3:2 carry : sum
// | |
// s2_0 0000 | f4 "0" f2 | !f4.f2 f4^f2
// s2_0 0001 | f4 "0" f2 | !f4.f2 f4^f2
// s2_0 0010 | f4 "0" f2 | !f4.f2 f4^f2
// s2_0 0011 | f4 "0" f2 | !f4.f2 f4^f2
// | |
// s3_0 0100 | f4 "0" "0" | "0" f4
// s3_0 0101 | f4 "0" "0" | "0" f4
// s3_0 0110 | f4 "0" "0" | "0" f4
// | |
// sx 0111 | f4 "1" "0" | !f4 !f4
// sx 1000 | f4 "1" "0" | !f4 !f4
// sx 1001 | f4 "1" "0" | !f4 !f4
// | |
// s3_1 1010 | f4 "0" "0" | "0" f4
// s3_1 1011 | f4 "0" "0" | "0" f4
// s3_1 1100 | f4 "0" "0" | "0" f4
// | |
// s2_1 1101 | f4 "0" !f2 | !f4.!f2 f4^!f2
// s2_1 1110 | f4 "0" !f2 | !f4.!f2 f4^!f2
// | |
// s1 1111 | f4 "0" !f3 | !f4.!f3 f4^!f3
//---------------------
assign ec3_if_s20 = (~eb4) & eb2;
assign ec3_if_s30 = tidn;
assign ec3_if_sx = (~eb4);
assign ec3_if_s31 = tidn;
assign ec3_if_s21 = (~eb4) & (~eb2);
assign ec3_if_s1 = (~eb4) & (~eb3);
assign es4_if_s20 = (~eb4) ^ eb2;
assign es4_if_s30 = (~eb4);
assign es4_if_sx = eb4;
assign es4_if_s31 = (~eb4);
assign es4_if_s21 = (~eb4) ^ (~eb2);
assign es4_if_s1 = (~eb4) ^ (~eb3);
assign ec4_if_s20 = (~eb5) & eb3;
assign ec4_if_s30 = (~eb5) | eb2;
assign ec4_if_sx = tidn;
assign ec4_if_s31 = (~eb5) | (~eb2);
assign ec4_if_s21 = (~eb5) & (~eb3);
assign ec4_if_s1 = (~eb5) & (~eb4);
assign es5_if_s20 = (~eb5) ^ eb3;
assign es5_if_s30 = (~eb5) ^ (~eb2);
assign es5_if_sx = (~eb5);
assign es5_if_s31 = (~eb5) ^ eb2;
assign es5_if_s21 = (~eb5) ^ (~eb3);
assign es5_if_s1 = (~eb5) ^ (~eb4);
assign ec5_if_s20 = (~eb6) & eb4;
assign ec5_if_s30 = (~eb6) & eb3;
assign ec5_if_sx = (~eb6);
assign ec5_if_s31 = (~eb6) & (~eb3);
assign ec5_if_s21 = (~eb6) | (~eb4);
assign ec5_if_s1 = (~eb6) & (~eb5);
assign es6_if_s20 = (~eb6) ^ eb4;
assign es6_if_s30 = (~eb6) ^ eb3;
assign es6_if_sx = eb6;
assign es6_if_s31 = (~eb6) ^ (~eb3);
assign es6_if_s21 = (~eb6) ^ eb4;
assign es6_if_s1 = (~eb6) ^ (~eb5);
assign ec6_if_s20 = (~eb7) & eb5;
assign ec6_if_s30 = (~eb7) & eb4;
assign ec6_if_sx = (~eb7);
assign ec6_if_s31 = (~eb7) | (~eb4);
assign ec6_if_s21 = (~eb7) & (~eb5);
assign ec6_if_s1 = (~eb7) & (~eb6);
assign es7_if_s20 = (~eb7) ^ eb5;
assign es7_if_s30 = (~eb7) ^ eb4;
assign es7_if_sx = eb7;
assign es7_if_s31 = (~eb7) ^ eb4;
assign es7_if_s21 = (~eb7) ^ (~eb5);
assign es7_if_s1 = (~eb7) ^ (~eb6);
assign ea4 = (es1 & (~eb3)) | (es2_0 & eb2) | (es2_1 & (~eb2));
assign ea5 = (es1 & (~eb4)) | (es2_0 & eb3) | (es2_1 & (~eb3)) | (es3_0 & eb2) | (es3_1 & (~eb2));
assign ea6 = (es1 & (~eb5)) | (es2_0 & eb4) | (es2_1 & (~eb4)) | (es3_0 & eb3) | (es3_1 & (~eb3));
assign ea7 = (es1 & (~eb6)) | (es2_0 & eb5) | (es2_1 & (~eb5)) | (es3_0 & eb4) | (es3_1 & (~eb4));
assign ea8 = (es1 & (~eb7)) | (es2_0 & eb6) | (es2_1 & (~eb6)) | (es3_0 & eb5) | (es3_1 & (~eb5));
assign ea9 = (es1 & (~eb8)) | (es2_0 & eb7) | (es2_1 & (~eb7)) | (es3_0 & eb6) | (es3_1 & (~eb6));
assign ea10 = (es1 & (~eb9)) | (es2_0 & eb8) | (es2_1 & (~eb8)) | (es3_0 & eb7) | (es3_1 & (~eb7));
assign ea11 = (es1 & (~eb10)) | (es2_0 & eb9) | (es2_1 & (~eb9)) | (es3_0 & eb8) | (es3_1 & (~eb8));
//------------------------------------------------------------------------------
assign ex5_ea[4:11] = {ea4, ea5, ea6, ea7, ea8, ea9, ea10, ea11};
assign ex5_ec[4:11] = {ec4, ec5, ec6, ec7, zeros[1:4]};
assign ex5_addend1[1:11] = ex5_f_b[1:11];
assign ex5_addend2[1:11] = {zeros[1:3], ex5_ea[4:11]};
assign ex5_addend3[1:11] = {zeros[1:3], ex5_ec[4:11]};
assign ex5_fsum[1] = ex5_f_b[1];
assign ex5_fsum[2] = ex5_f_b[2];
assign ex5_fsum[3] = ex5_f_b[3];
assign ex5_fsum[4] = (es1 & es4_if_s1) | (es2_0 & es4_if_s20) | (es3_0 & es4_if_s30) | (esx & es4_if_sx) | (es3_1 & es4_if_s31) | (es2_1 & es4_if_s21);
assign ex5_fsum[5] = (es1 & es5_if_s1) | (es2_0 & es5_if_s20) | (es3_0 & es5_if_s30) | (esx & es5_if_sx) | (es3_1 & es5_if_s31) | (es2_1 & es5_if_s21);
assign ex5_fsum[6] = (es1 & es6_if_s1) | (es2_0 & es6_if_s20) | (es3_0 & es6_if_s30) | (esx & es6_if_sx) | (es3_1 & es6_if_s31) | (es2_1 & es6_if_s21);
assign ex5_fsum[7] = (es1 & es7_if_s1) | (es2_0 & es7_if_s20) | (es3_0 & es7_if_s30) | (esx & es7_if_sx) | (es3_1 & es7_if_s31) | (es2_1 & es7_if_s21);
assign ex5_fsum[8] = ex5_f_b[8];
assign ex5_fsum[9] = ex5_f_b[9];
assign ex5_fsum[10] = ex5_f_b[10];
assign ex5_fsum[11] = ex5_f_b[11];
assign ex5_fcarryin[1] = tidn;
assign ex5_fcarryin[2] = tidn;
assign ex5_fcarryin[3] = (es1 & ec3_if_s1) | (es2_0 & ec3_if_s20) | (es3_0 & ec3_if_s30) | (esx & ec3_if_sx) | (es3_1 & ec3_if_s31) | (es2_1 & ec3_if_s21);
assign ex5_fcarryin[4] = (es1 & ec4_if_s1) | (es2_0 & ec4_if_s20) | (es3_0 & ec4_if_s30) | (esx & ec4_if_sx) | (es3_1 & ec4_if_s31) | (es2_1 & ec4_if_s21);
assign ex5_fcarryin[5] = (es1 & ec5_if_s1) | (es2_0 & ec5_if_s20) | (es3_0 & ec5_if_s30) | (esx & ec5_if_sx) | (es3_1 & ec5_if_s31) | (es2_1 & ec5_if_s21);
assign ex5_fcarryin[6] = (es1 & ec6_if_s1) | (es2_0 & ec6_if_s20) | (es3_0 & ec6_if_s30) | (esx & ec6_if_sx) | (es3_1 & ec6_if_s31) | (es2_1 & ec6_if_s21);
assign ex5_fcarryin[7] = tidn;
assign ex5_fcarryin[8] = ea8;
assign ex5_fcarryin[9] = ea9;
assign ex5_fcarryin[10] = ea10;
assign ex5_fcarryin[11] = ea11;
assign ex5_powf_a_addend_b = (~ex5_fsum[1:11]);
assign ex5_powf_b_addend_b = (~(ex5_fcarryin[1:11]));
fu_gst_add11 ex5_powfractadd11(
.a_b(ex5_powf_a_addend_b),
.b_b(ex5_powf_b_addend_b),
//------------------------------------------------------
.s0(ex5_pow_fract_b)
);
assign ex5_pow_fract = (~ex5_pow_fract_b);
//----------------------------------------------------------------------------------------------------------------------
// not (dp bias +9)
assign ex5_log_dp_bias = (11'b01111110111 & {11{(~ex5_logof1_specialcase)}}) |
(11'b11111111101 & {11{ex5_logof1_specialcase}}); // results in exp of 000..1, which is zero
assign ex5_log_a_addend_b[1:11] = {zeros[1:6], ex5_shamt[0:4]};
assign ex5_log_b_addend_b[1:11] = ex5_log_dp_bias;
assign ex5_pow_a_addend_b[1:11] = (~({ex5_mantissa[1], ex5_mantissa[1], ex5_mantissa[1], ex5_mantissa[1:8]}));
assign ex5_pow_b_addend_b[1:11] = 11'b10000000000; // dp bias
assign ex5_exponent_a_addend_b = (ex5_log_a_addend_b & {11{ex5_floges}}) |
(ex5_pow_a_addend_b & {11{ex5_fexptes}});
assign ex5_exponent_b_addend_b = (ex5_log_b_addend_b & {11{ex5_floges}}) |
(ex5_pow_b_addend_b & {11{ex5_fexptes}});
//---------------------------------------------------------------------
fu_gst_add11 ex5_explogadd11(
.a_b(ex5_exponent_a_addend_b),
.b_b(ex5_exponent_b_addend_b),
//------------------------------------------------------
.s0(ex5_biased_exponent_result)
);
//---------------------------------------------------------------------
assign ex5_log_fract = ex5_log_mantissa_postsh[01:19];
assign ex5_log_signbit = ex5_negate;
assign ex5_signbit_din = ex5_log_signbit & ex5_floges;
assign ex5_fract_din = (({((~ex5_logof1_specialcase)), ex5_log_fract[1:19]}) & {20{ex5_floges}}) |
(({tiup, ex5_pow_fract[1:11], zeros[1:8]}) & {20{ex5_fexptes}});
//---------------------------------------------------------------------
//---------------------------------------------------------------------
//---------------------------------------------------------------------
tri_rlmreg_p #( .WIDTH(2), .NEEDS_SRESET(0)) ex6_gst_ctrl_lat(
.force_t(force_t), //d_mode => tiup, delay_lclkr => tidn,
.d_mode(tiup),
.delay_lclkr(delay_lclkr[5]),
.mpw1_b(mpw1_b[5]),
.mpw2_b(mpw2_b[1]),
.vd(vdd),
.gd(gnd),
.nclk(nclk),
.thold_b(thold_0_b),
.sg(sg_0),
//-----------------
.act(ex5_act),
//-----------------
.scout(ex6_gst_ctrl_lat_scout),
.scin(ex6_gst_ctrl_lat_scin),
//-----------------
.din({ex5_floges,
ex5_fexptes}),
//-----------------
.dout({ex6_floges,
ex6_fexptes})
);
tri_rlmreg_p #( .WIDTH(32), .NEEDS_SRESET(0)) ex6_gst_stage_lat(
.force_t(force_t), //d_mode => tiup, delay_lclkr => tidn,
.d_mode(tiup),
.delay_lclkr(delay_lclkr[5]),
.mpw1_b(mpw1_b[5]),
.mpw2_b(mpw2_b[1]),
.vd(vdd),
.gd(gnd),
.nclk(nclk),
.thold_b(thold_0_b),
.sg(sg_0),
//-----------------
.act(ex5_act),
//-----------------
.scout(ex6_gst_stage_lat_scout),
.scin(ex6_gst_stage_lat_scin),
//-----------------
.din({ex5_signbit_din,
ex5_biased_exponent_result,
ex5_fract_din}),
//-----------------
.dout({ex6_signbit,
ex6_biased_exponent_result,
ex6_fract})
);
//---------------------------------------------------------------------
//---------------------------------------------------------------------
//---------------------------------------------------------------------
assign f_gst_ex6_logexp_sign = ex6_signbit;
assign f_gst_ex6_logexp_exp = ex6_biased_exponent_result;
assign f_gst_ex6_logexp_fract = ex6_fract;
assign f_gst_ex6_logexp_v = ex6_floges | ex6_fexptes;
// todo: clk gating with acts, gate with log,exp instr decodes, fpu enable, etc
assign ex3_gst_ctrl_lat_scin[0:1] = {f_gst_si, ex3_gst_ctrl_lat_scout[0]};
assign ex4_gst_ctrl_lat_scin[0:1] = {ex3_gst_ctrl_lat_scout[1], ex4_gst_ctrl_lat_scout[0]};
assign ex5_gst_ctrl_lat_scin[0:3] = {ex4_gst_ctrl_lat_scout[1], ex5_gst_ctrl_lat_scout[0:2]};
assign ex6_gst_ctrl_lat_scin[0:1] = {ex5_gst_ctrl_lat_scout[3], ex6_gst_ctrl_lat_scout[0]};
assign ex3_gst_stage_lat_scin[0:32] = {ex6_gst_ctrl_lat_scout[1], ex3_gst_stage_lat_scout[0:31]};
assign ex4_gst_stage_lat_scin[0:19] = {ex3_gst_stage_lat_scout[32], ex4_gst_stage_lat_scout[0:18]};
assign ex5_gst_stage_lat_scin[0:23] = {ex4_gst_stage_lat_scout[19], ex5_gst_stage_lat_scout[0:22]};
assign ex6_gst_stage_lat_scin[0:31] = {ex5_gst_stage_lat_scout[23], ex6_gst_stage_lat_scout[0:30]};
assign act_si[0:7] = {act_so[1:7], ex6_gst_stage_lat_scout[31]};
assign f_gst_so = act_so[0];
endmodule