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------------------------------------------------
--! @file fadd32.vhd
--! @brief RayTrac Floating Point Adder  
--! @author Juli&aacute;n Andr&eacute;s Guar&iacute;n Reyes
--------------------------------------------------
 
 
-- RAYTRAC (FP BRANCH)
-- Author Julian Andres Guarin
-- fadd32.vhd
-- This file is part of raytrac.
-- 
--     raytrac is free software: you can redistribute it and/or modify
--     it under the terms of the GNU General Public License as published by
--     the Free Software Foundation, either version 3 of the License, or
--     (at your option) any later version.
-- 
--     raytrac is distributed in the hope that it will be useful,
--     but WITHOUT ANY WARRANTY; without even the implied warranty of
--     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
--     GNU General Public License for more details.
-- 
--     You should have received a copy of the GNU General Public License
--     along with raytrac.  If not, see <http://www.gnu.org/licenses/>
library ieee;
use ieee.std_logic_1164.all;
use ieee.std_logic_unsigned.all;
library lpm;
use lpm.all;
--! Esta entidad recibe dos n&uacutemeros en formato punto flotante IEEE 754, de precision simple y devuelve las mantissas signadas y corridas, y el exponente correspondiente al resultado antes de normalizarlo al formato float. 
--!\nLas 2 mantissas y el exponente entran despues a la entidad add2 que suma las mantissas y entrega el resultado en formato IEEE 754.
entity fadd32 is
        generic (
                propagation_chain : string := "ON"
        );
        port (
                clk,dpc,prop_in : in std_logic;
                a32,b32         : in std_logic_vector (31 downto 0);
                c32,prop_out            : out std_logic_vector(31 downto 0)
        );
end fadd32;
architecture fadd32_arch of fadd32 is
 
        component lpm_mult
        generic (
                lpm_hint                        : string;
                lpm_representation      : string;
                lpm_type                        : string;
                lpm_widtha                      : natural;
                lpm_widthb                      : natural;
                lpm_widthp                      : natural
        );
        port (
                dataa   : in std_logic_vector ( lpm_widtha-1 downto 0 );
                datab   : in std_logic_vector ( lpm_widthb-1 downto 0 );
                result  : out std_logic_vector( lpm_widthp-1 downto 0 )
        );
        end component;
 
        signal s1zero,s5tokena,s5tokenb,s5tokenc,s7sign                                                                                 : std_logic;
        signal s5token                                                                                                                                          : std_logic_vector(2 downto 0);
        signal s1delta                                                                                                                                          : std_logic_vector(5 downto 0);
        signal s0delta,s1exp,s2exp,s3exp,s4exp,s5exp,s6exp,s5factor,s6factor,s7exp,s7factor     : std_logic_vector(7 downto 0);
        signal s1shifter,s5factorhot9,s6factorhot9                                                                                      : std_logic_vector(8 downto 0);
        signal s1pl,s6pl                                                                                                                                        : std_logic_vector(17 downto 0);
        signal s6postshift,s7postshift                                                                                                          : std_logic_vector(22 downto 0);
        signal s1umantshift,s1umantfixed,s1postshift,s1xorslab,s2xorslab                                        : std_logic_vector(23 downto 0);
        signal s5factorhot24                                                                                                                            : std_logic_vector(23 downto 0);
        signal s2umantshift,s2mantfixed,s3mantfixed,s3mantshift,s4xorslab                                       : std_logic_vector(24 downto 0);
        signal s4sresult,s5result,s6result                                                                                                      : std_logic_vector(25 downto 0); -- Signed mantissa result
        signal s1ph,s6ph                                                                                                                                        : std_logic_vector(26 downto 0);
        signal s0a,s0b                                                                                                                                          : std_logic_vector(31 downto 0); -- Float 32 bit 
        signal sxprop : std_logic_vector(7 downto 0);
 
begin
        propagation:
        if propagation_chain="ON" generate
                prop_out <= sxprop(7);
                process (clk)
                begin
                        if clk'event and clk='1' then
                                for i in 7 downto 1 loop
                                        sxprop(i) <= sxprop(i-1);
                                end loop;
                                sxprop(0) <= prop_in;
                        end if;
                end process;
        end generate propagation ;
        process (clk)
        begin
                if clk'event and clk='1'  then
 
                        --!Registro de entrada
                        s0a <= a32;
                        s0b(31) <= dpc xor b32(31);     --! Importante: Integrar el signo en el operando B
                        s0b(30 downto 0) <= b32(30 downto 0);
 
                        --!Etapa 0,Escoger el mayor exponente que sera el resultado desnormalizado, calcula cuanto debe ser el corrimiento de la mantissa con menor exponente y reorganiza los operandos, si el mayor es b, intercambia las posici&oacute;n si el mayor es a las posiciones la mantiene. Zero check.
                        --!signo,exponente,mantissa
                        if (s0b(30 downto 23)&s0a(30 downto 23))=x"0000" then
                                s1zero <= '0';
                        else
                                s1zero <= '1';
                        end if;
                        s1delta <= s0delta(7) & (s0delta(7) xor s0delta(4))&(s0delta(7) xor s0delta(3)) & s0delta(2 downto 0);
                        case s0delta(7) is
                                when '1'  =>
                                        s1exp <= s0b(30 downto 23);
                                        s1umantshift <= s0a(31)&s0a(22 downto 0);
                                        s1umantfixed <= s0b(31)&s0b(22 downto 0);
                                when others =>
                                        s1exp <= s0a(30 downto 23);
                                        s1umantshift <= s0b(31)&s0b(22 downto 0);
                                        s1umantfixed <= s0a(31)&s0a(22 downto 0);
                        end case;
 
                        --! Etapa 1: Denormalizaci&oacute;n de la mantissas.  
                        case s1delta(4 downto 3) is
                                when "00" =>    s2umantshift <= s1umantshift(23)&s1postshift(23 downto 0);
                                when "01" =>    s2umantshift <= s1umantshift(23)&x"00"&s1postshift(23 downto 8);
                                when "10" =>    s2umantshift <= s1umantshift(23)&x"0000"&s1postshift(23 downto 16);
                                when others =>  s2umantshift <= (others => '0');
                        end case;
                        s2mantfixed <= s1umantfixed(23) &         ( ( ('1'&s1umantfixed(22 downto 0)) xor s1xorslab)   + ( x"00000"&"000"&s1umantfixed(23)  )   );
                        s2exp  <= s1exp;
 
                        --! Etapa2: Signar la mantissa denormalizada.
                        s3mantfixed <= s2mantfixed;
                        s3mantshift <= s2umantshift(24)&         (  (      s2umantshift(23 downto 0)  xor s2xorslab)   + ( x"00000"&"000"&s2umantshift(24)  )   );
                        s3exp           <= s2exp;
 
                        --! Etapa 3: Etapa 3 Realizar la suma, entre la mantissa corrida y la fija.
                        s4sresult       <= (s3mantshift(24)&s3mantshift)+(s3mantfixed(24)&s3mantfixed);
                        s4exp           <= s3exp;
 
                        --! Etapa 4: Quitar el signo a la mantissa resultante.
                        s5result        <= s4sresult(25)&((s4sresult(24 downto 0) xor s4xorslab)  +(x"000000"&s4sresult(25)));
                        s5exp           <= s4exp;
 
 
                        --! Etapa 5: Codificar el corrimiento para la normalizacion de la mantissa resultante.
                        s6result                <= s5result;
                        s6exp                   <= s5exp;
                        s6factor                <= s5factor;
                        s6factorhot9    <= s5factorhot9;
 
                        --! Etapa 6: Ejecutar el corrimiento de la mantissa.
                        s7sign                  <= s6result(25);
                        s7exp                   <= s6exp;
                        s7factor                <= s6factor;
                        s7postshift             <= s6postshift;
 
 
                end if;
        end process;
 
        --! Etapa 7: Entregar el resultado.
        c32(31) <= s7sign;
        process(s7exp,s7postshift,s7factor)
        begin
                c32(30 downto 23)       <= s7exp+s7factor;
                case s7factor(4 downto 3) is
                        when "01"       => c32(22 downto 0) <= s7postshift(14 downto 00)&x"00";
                        when "10"       => c32(22 downto 0) <= s7postshift(06 downto 00)&x"0000";
                        when others => c32(22 downto 0)  <= s7postshift;
                end case;
        end process;
        --! Combinatorial gremlin, Etapa 0 el corrimiento de la mantissa con menor exponente y reorganiza los operandos,\n
        --! si el mayor es b, intercambia las posici&oacute;n si el mayor es a las posiciones la mantiene. 
        s0delta <=  s0a(30 downto 23)-s0b(30 downto 23);
        --! Combinatorial Gremlin, Etapa 1 Codificar el factor de corrimiento de denormalizacion y denormalizar la mantissa no fija. Signar la mantissa que se queda fija.
        decodeshiftfactor:
        process (s1delta(2 downto 0))
        begin
                case s1delta(2 downto 0) is
                        when "111" =>  s1shifter(8 downto 0) <= '0'&s1delta(5)&"00000"&not(s1delta(5))&'0';
                        when "110" =>  s1shifter(8 downto 0) <= "00"&s1delta(5)&"000"&not(s1delta(5))&"00";
                        when "101" =>  s1shifter(8 downto 0) <= "000"&s1delta(5)&'0'&not(s1delta(5))&"000";
                        when "100" =>  s1shifter(8 downto 0) <= '0'&x"10";
                        when "011" =>  s1shifter(8 downto 0) <= "000"&not(s1delta(5))&'0'&s1delta(5)&"000";
                        when "010" =>  s1shifter(8 downto 0) <= "00"&not(s1delta(5))&"000"&s1delta(5)&"00";
                        when "001" =>  s1shifter(8 downto 0) <= '0'&not(s1delta(5))&"00000"&s1delta(5)&'0';
                        when others => s1shifter(8 downto 0) <=    not(s1delta(5))&"0000000"&s1delta(5);
                end case;
        end process;
        denormhighshiftermult:lpm_mult
        generic map ("DEDICATED_MULTIPLIER_CIRCUITRY=YES,MAXIMIZE_SPEED=9","UNSIGNED","LPM_MULT",9,18,27)
        port    map (s1shifter,s1zero&s1umantshift(22 downto 06),s1ph);
        denormlowshiftermult:lpm_mult
        generic map ("DEDICATED_MULTIPLIER_CIRCUITRY=YES,MAXIMIZE_SPEED=9","UNSIGNED","LPM_MULT",9,9,18)
        port    map (s1shifter,s1umantshift(5 downto 0)&"000",s1pl);
 
        s1postshift(23 downto 7) <= s1ph(25 downto 9);
        s1postshift(06 downto 0) <= s1ph(08 downto 2) or s1pl(17 downto 11);
        s1xorslab(23 downto 0) <= (others => s1umantfixed(23));
 
        --! Combinatorial Gremlin, Etapa 2: Signar la mantissa denormalizada. 
        s2xorslab <= (others => s2umantshift(24));
 
        --! Combinatorial Gremlin, Etapa 4: Quitar el signo de la mantissa resultante.
        s4xorslab <= (others => s4sresult(25));
 
        --! Combinatorial Gremlin, Etapa 5: Codificar el factor de normalizacion de la mantissa resultante.
        normalizerdecodeshift:
        process (s5result,s5factorhot24,s5token,s5tokena,s5tokenb,s5tokenc,s5factorhot9)
        begin
                s5tokena <= not(s5result(24));
                s5tokenb <= not(s5result(24));
                s5tokenc <= not(s5result(24));
                s5factor(7 downto 5) <= (others => s5result(24));
                s5factorhot24 <= x"000000";
                for i in 23 downto 16 loop
                        if s5result(i)='1' then
                                s5factorhot24(23-i) <= s5tokena;
                                s5tokenb <= '0';
                                s5tokenc <= '0';
                                exit;
                        end if;
                end loop;
                for i in 15 downto 8 loop
                        if s5result(i)='1' then
                                s5factorhot24(23-i) <= s5tokenb;
                                s5tokenc <= '0';
                                exit;
                        end if;
                end loop;
                for i in 7 downto 0 loop
                        if s5result(i)='1' then
                                s5factorhot24(23-i) <= s5tokenc;
                                exit;
                        end if;
                end loop;
                s5token <=s5tokena&s5tokenb&s5tokenc;
                case (s5token) is
                        when "100"  => s5factor(4 downto 3) <= "10";
                        when "110"  => s5factor(4 downto 3) <= "01";
                        when "111"      => s5factor(4 downto 3) <= "00";
                        when others => s5factor(4 downto 3) <= (others => s5result(24));
                end case;
                s5factorhot9 <= (s5factorhot24(7 downto 0)or s5factorhot24(15 downto 8)or s5factorhot24(23 downto 16)) & s5result(24);
                case s5factorhot9 is
                        when "100000000" => s5factor(2 downto 0) <= "111";
                        when "010000000" => s5factor(2 downto 0) <= "110";
                        when "001000000" => s5factor(2 downto 0) <= "101";
                        when "000100000" => s5factor(2 downto 0) <= "100";
                        when "000010000" => s5factor(2 downto 0) <= "011";
                        when "000001000" => s5factor(2 downto 0) <= "010";
                        when "000000100" => s5factor(2 downto 0) <= "001";
                        when "000000010" => s5factor(2 downto 0) <= "000";
                        when others => s5factor (2 downto 0) <= (others => s5result(24));
                end case;
 
        end process;
 
        --! Etapa 6: Ejecutar el corrimiento para normalizar la mantissa.
        normhighshiftermult:lpm_mult
        generic map ("DEDICATED_MULTIPLIER_CIRCUITRY=YES,MAXIMIZE_SPEED=9","UNSIGNED","LPM_MULT",9,18,27)
        port    map (s6factorhot9,s6result(24 downto 7),s6ph);
        normlowshiftermult:lpm_mult
        generic map ("DEDICATED_MULTIPLIER_CIRCUITRY=YES,MAXIMIZE_SPEED=9","UNSIGNED","LPM_MULT",9,9,18)
        port    map (s6factorhot9,s6result(06 downto 0)&"00",s6pl);
        s6postshift(22 downto 15) <= s6ph(16 downto 09);
        s6postshift(14 downto 06) <= s6ph(08 downto 00) + s6pl(17 downto 09);
        s6postshift(05 downto 00) <= s6pl(08 downto 03);
 
 
 
 
 
end fadd32_arch;
 
 

Line No.	Rev	Author	Line
1	118	jguarin200	`------------------------------------------------`
2	119	jguarin200	`--! @file fadd32.vhd`
3	118	jguarin200	`--! @brief RayTrac Floating Point Adder`
4			`--! @author Julián Andrés Guarín Reyes`
5			`--------------------------------------------------`
6
7
8			`-- RAYTRAC (FP BRANCH)`
9			`-- Author Julian Andres Guarin`
10	119	jguarin200	`-- fadd32.vhd`
11	118	jguarin200	`-- This file is part of raytrac.`
12			`--`
13			`-- raytrac is free software: you can redistribute it and/or modify`
14			`-- it under the terms of the GNU General Public License as published by`
15			`-- the Free Software Foundation, either version 3 of the License, or`
16			`-- (at your option) any later version.`
17			`--`
18			`-- raytrac is distributed in the hope that it will be useful,`
19			`-- but WITHOUT ANY WARRANTY; without even the implied warranty of`
20			`-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
21			`-- GNU General Public License for more details.`
22			`--`
23			`-- You should have received a copy of the GNU General Public License`
24			`-- along with raytrac. If not, see <http://www.gnu.org/licenses/>`
25			`library ieee;`
26			`use ieee.std_logic_1164.all;`
27			`use ieee.std_logic_unsigned.all;`
28	119	jguarin200	`library lpm;`
29			`use lpm.all;`
30	118	jguarin200	`--! Esta entidad recibe dos n&uacutemeros en formato punto flotante IEEE 754, de precision simple y devuelve las mantissas signadas y corridas, y el exponente correspondiente al resultado antes de normalizarlo al formato float.`
31			`--!\nLas 2 mantissas y el exponente entran despues a la entidad add2 que suma las mantissas y entrega el resultado en formato IEEE 754.`
32	139	jguarin200	`entity fadd32 is`
33			`generic (`
34			`propagation_chain : string := "ON"`
35			`);`
36	118	jguarin200	`port (`
37	139	jguarin200	`clk,dpc,prop_in : in std_logic;`
38	118	jguarin200	`a32,b32 : in std_logic_vector (31 downto 0);`
39	139	jguarin200	`c32,prop_out : out std_logic_vector(31 downto 0)`
40	118	jguarin200	`);`
41	119	jguarin200	`end fadd32;`
42			`architecture fadd32_arch of fadd32 is`
43	118	jguarin200
44			`component lpm_mult`
45			`generic (`
46			`lpm_hint : string;`
47			`lpm_representation : string;`
48			`lpm_type : string;`
49			`lpm_widtha : natural;`
50			`lpm_widthb : natural;`
51			`lpm_widthp : natural`
52			`);`
53			`port (`
54			`dataa : in std_logic_vector ( lpm_widtha-1 downto 0 );`
55			`datab : in std_logic_vector ( lpm_widthb-1 downto 0 );`
56			`result : out std_logic_vector( lpm_widthp-1 downto 0 )`
57			`);`
58			`end component;`
59
60	120	jguarin200	`signal s1zero,s5tokena,s5tokenb,s5tokenc,s7sign : std_logic;`
61			`signal s5token : std_logic_vector(2 downto 0);`
62	119	jguarin200	`signal s1delta : std_logic_vector(5 downto 0);`
63			`signal s0delta,s1exp,s2exp,s3exp,s4exp,s5exp,s6exp,s5factor,s6factor,s7exp,s7factor : std_logic_vector(7 downto 0);`
64			`signal s1shifter,s5factorhot9,s6factorhot9 : std_logic_vector(8 downto 0);`
65			`signal s1pl,s6pl : std_logic_vector(17 downto 0);`
66			`signal s6postshift,s7postshift : std_logic_vector(22 downto 0);`
67			`signal s1umantshift,s1umantfixed,s1postshift,s1xorslab,s2xorslab : std_logic_vector(23 downto 0);`
68	120	jguarin200	`signal s5factorhot24 : std_logic_vector(23 downto 0);`
69	119	jguarin200	`signal s2umantshift,s2mantfixed,s3mantfixed,s3mantshift,s4xorslab : std_logic_vector(24 downto 0);`
70	120	jguarin200	`signal s4sresult,s5result,s6result : std_logic_vector(25 downto 0); -- Signed mantissa result`
71	119	jguarin200	`signal s1ph,s6ph : std_logic_vector(26 downto 0);`
72			`signal s0a,s0b : std_logic_vector(31 downto 0); -- Float 32 bit`
73	139	jguarin200	`signal sxprop : std_logic_vector(7 downto 0);`
74	118	jguarin200
75			`begin`
76	139	jguarin200	`propagation:`
77			`if propagation_chain="ON" generate`
78			`prop_out <= sxprop(7);`
79			`process (clk)`
80			`begin`
81			`if clk'event and clk='1' then`
82			`for i in 7 downto 1 loop`
83			`sxprop(i) <= sxprop(i-1);`
84			`end loop;`
85			`sxprop(0) <= prop_in;`
86			`end if;`
87			`end process;`
88			`end generate propagation ;`
89			`process (clk)`
90	118	jguarin200	`begin`
91	139	jguarin200	`if clk'event and clk='1' then`
92	118	jguarin200
93			`--!Registro de entrada`
94			`s0a <= a32;`
95			`s0b(31) <= dpc xor b32(31); --! Importante: Integrar el signo en el operando B`
96			`s0b(30 downto 0) <= b32(30 downto 0);`
97
98			`--!Etapa 0,Escoger el mayor exponente que sera el resultado desnormalizado, calcula cuanto debe ser el corrimiento de la mantissa con menor exponente y reorganiza los operandos, si el mayor es b, intercambia las posición si el mayor es a las posiciones la mantiene. Zero check.`
99			`--!signo,exponente,mantissa`
100			`if (s0b(30 downto 23)&s0a(30 downto 23))=x"0000" then`
101			`s1zero <= '0';`
102			`else`
103			`s1zero <= '1';`
104			`end if;`
105	119	jguarin200	`s1delta <= s0delta(7) & (s0delta(7) xor s0delta(4))&(s0delta(7) xor s0delta(3)) & s0delta(2 downto 0);`
106	118	jguarin200	`case s0delta(7) is`
107			`when '1' =>`
108			`s1exp <= s0b(30 downto 23);`
109			`s1umantshift <= s0a(31)&s0a(22 downto 0);`
110			`s1umantfixed <= s0b(31)&s0b(22 downto 0);`
111			`when others =>`
112			`s1exp <= s0a(30 downto 23);`
113			`s1umantshift <= s0b(31)&s0b(22 downto 0);`
114			`s1umantfixed <= s0a(31)&s0a(22 downto 0);`
115			`end case;`
116
117			`--! Etapa 1: Denormalización de la mantissas.`
118			`case s1delta(4 downto 3) is`
119			`when "00" => s2umantshift <= s1umantshift(23)&s1postshift(23 downto 0);`
120			`when "01" => s2umantshift <= s1umantshift(23)&x"00"&s1postshift(23 downto 8);`
121			`when "10" => s2umantshift <= s1umantshift(23)&x"0000"&s1postshift(23 downto 16);`
122			`when others => s2umantshift <= (others => '0');`
123			`end case;`
124			`s2mantfixed <= s1umantfixed(23) & ( ( ('1'&s1umantfixed(22 downto 0)) xor s1xorslab) + ( x"00000"&"000"&s1umantfixed(23) ) );`
125			`s2exp <= s1exp;`
126
127			`--! Etapa2: Signar la mantissa denormalizada.`
128			`s3mantfixed <= s2mantfixed;`
129			`s3mantshift <= s2umantshift(24)& ( ( s2umantshift(23 downto 0) xor s2xorslab) + ( x"00000"&"000"&s2umantshift(24) ) );`
130			`s3exp <= s2exp;`
131
132	119	jguarin200	`--! Etapa 3: Etapa 3 Realizar la suma, entre la mantissa corrida y la fija.`
133	118	jguarin200	`s4sresult <= (s3mantshift(24)&s3mantshift)+(s3mantfixed(24)&s3mantfixed);`
134			`s4exp <= s3exp;`
135
136			`--! Etapa 4: Quitar el signo a la mantissa resultante.`
137			`s5result <= s4sresult(25)&((s4sresult(24 downto 0) xor s4xorslab) +(x"000000"&s4sresult(25)));`
138			`s5exp <= s4exp;`
139
140
141			`--! Etapa 5: Codificar el corrimiento para la normalizacion de la mantissa resultante.`
142	119	jguarin200	`s6result <= s5result;`
143			`s6exp <= s5exp;`
144	118	jguarin200	`s6factor <= s5factor;`
145	119	jguarin200	`s6factorhot9 <= s5factorhot9;`
146	118	jguarin200
147	119	jguarin200	`--! Etapa 6: Ejecutar el corrimiento de la mantissa.`
148	120	jguarin200	`s7sign <= s6result(25);`
149	119	jguarin200	`s7exp <= s6exp;`
150	120	jguarin200	`s7factor <= s6factor;`
151	119	jguarin200	`s7postshift <= s6postshift;`
152
153	137	jguarin200
154	118	jguarin200	`end if;`
155			`end process;`
156	137	jguarin200
157			`--! Etapa 7: Entregar el resultado.`
158			`c32(31) <= s7sign;`
159			`process(s7exp,s7postshift,s7factor)`
160			`begin`
161			`c32(30 downto 23) <= s7exp+s7factor;`
162			`case s7factor(4 downto 3) is`
163			`when "01" => c32(22 downto 0) <= s7postshift(14 downto 00)&x"00";`
164			`when "10" => c32(22 downto 0) <= s7postshift(06 downto 00)&x"0000";`
165			`when others => c32(22 downto 0) <= s7postshift;`
166			`end case;`
167			`end process;`
168	118	jguarin200	`--! Combinatorial gremlin, Etapa 0 el corrimiento de la mantissa con menor exponente y reorganiza los operandos,\n`
169			`--! si el mayor es b, intercambia las posición si el mayor es a las posiciones la mantiene.`
170			`s0delta <= s0a(30 downto 23)-s0b(30 downto 23);`
171			`--! Combinatorial Gremlin, Etapa 1 Codificar el factor de corrimiento de denormalizacion y denormalizar la mantissa no fija. Signar la mantissa que se queda fija.`
172			`decodeshiftfactor:`
173			`process (s1delta(2 downto 0))`
174			`begin`
175			`case s1delta(2 downto 0) is`
176			`when "111" => s1shifter(8 downto 0) <= '0'&s1delta(5)&"00000"&not(s1delta(5))&'0';`
177			`when "110" => s1shifter(8 downto 0) <= "00"&s1delta(5)&"000"&not(s1delta(5))&"00";`
178			`when "101" => s1shifter(8 downto 0) <= "000"&s1delta(5)&'0'&not(s1delta(5))&"000";`
179			`when "100" => s1shifter(8 downto 0) <= '0'&x"10";`
180			`when "011" => s1shifter(8 downto 0) <= "000"&not(s1delta(5))&'0'&s1delta(5)&"000";`
181			`when "010" => s1shifter(8 downto 0) <= "00"&not(s1delta(5))&"000"&s1delta(5)&"00";`
182			`when "001" => s1shifter(8 downto 0) <= '0'&not(s1delta(5))&"00000"&s1delta(5)&'0';`
183			`when others => s1shifter(8 downto 0) <= not(s1delta(5))&"0000000"&s1delta(5);`
184			`end case;`
185			`end process;`
186			`denormhighshiftermult:lpm_mult`
187			`generic map ("DEDICATED_MULTIPLIER_CIRCUITRY=YES,MAXIMIZE_SPEED=9","UNSIGNED","LPM_MULT",9,18,27)`
188			`port map (s1shifter,s1zero&s1umantshift(22 downto 06),s1ph);`
189			`denormlowshiftermult:lpm_mult`
190			`generic map ("DEDICATED_MULTIPLIER_CIRCUITRY=YES,MAXIMIZE_SPEED=9","UNSIGNED","LPM_MULT",9,9,18)`
191			`port map (s1shifter,s1umantshift(5 downto 0)&"000",s1pl);`
192
193			`s1postshift(23 downto 7) <= s1ph(25 downto 9);`
194			`s1postshift(06 downto 0) <= s1ph(08 downto 2) or s1pl(17 downto 11);`
195			`s1xorslab(23 downto 0) <= (others => s1umantfixed(23));`
196
197			`--! Combinatorial Gremlin, Etapa 2: Signar la mantissa denormalizada.`
198			`s2xorslab <= (others => s2umantshift(24));`
199
200			`--! Combinatorial Gremlin, Etapa 4: Quitar el signo de la mantissa resultante.`
201			`s4xorslab <= (others => s4sresult(25));`
202
203			`--! Combinatorial Gremlin, Etapa 5: Codificar el factor de normalizacion de la mantissa resultante.`
204			`normalizerdecodeshift:`
205	120	jguarin200	`process (s5result,s5factorhot24,s5token,s5tokena,s5tokenb,s5tokenc,s5factorhot9)`
206	118	jguarin200	`begin`
207	120	jguarin200	`s5tokena <= not(s5result(24));`
208			`s5tokenb <= not(s5result(24));`
209			`s5tokenc <= not(s5result(24));`
210			`s5factor(7 downto 5) <= (others => s5result(24));`
211			`s5factorhot24 <= x"000000";`
212			`for i in 23 downto 16 loop`
213	118	jguarin200	`if s5result(i)='1' then`
214	120	jguarin200	`s5factorhot24(23-i) <= s5tokena;`
215			`s5tokenb <= '0';`
216			`s5tokenc <= '0';`
217	118	jguarin200	`exit;`
218			`end if;`
219			`end loop;`
220	120	jguarin200	`for i in 15 downto 8 loop`
221			`if s5result(i)='1' then`
222			`s5factorhot24(23-i) <= s5tokenb;`
223			`s5tokenc <= '0';`
224			`exit;`
225			`end if;`
226			`end loop;`
227			`for i in 7 downto 0 loop`
228			`if s5result(i)='1' then`
229			`s5factorhot24(23-i) <= s5tokenc;`
230			`exit;`
231			`end if;`
232			`end loop;`
233			`s5token <=s5tokena&s5tokenb&s5tokenc;`
234			`case (s5token) is`
235			`when "100" => s5factor(4 downto 3) <= "10";`
236			`when "110" => s5factor(4 downto 3) <= "01";`
237			`when "111" => s5factor(4 downto 3) <= "00";`
238			`when others => s5factor(4 downto 3) <= (others => s5result(24));`
239			`end case;`
240			`s5factorhot9 <= (s5factorhot24(7 downto 0)or s5factorhot24(15 downto 8)or s5factorhot24(23 downto 16)) & s5result(24);`
241			`case s5factorhot9 is`
242			`when "100000000" => s5factor(2 downto 0) <= "111";`
243			`when "010000000" => s5factor(2 downto 0) <= "110";`
244			`when "001000000" => s5factor(2 downto 0) <= "101";`
245			`when "000100000" => s5factor(2 downto 0) <= "100";`
246			`when "000010000" => s5factor(2 downto 0) <= "011";`
247			`when "000001000" => s5factor(2 downto 0) <= "010";`
248			`when "000000100" => s5factor(2 downto 0) <= "001";`
249			`when "000000010" => s5factor(2 downto 0) <= "000";`
250			`when others => s5factor (2 downto 0) <= (others => s5result(24));`
251			`end case;`
252
253	118	jguarin200	`end process;`
254	119	jguarin200
255			`--! Etapa 6: Ejecutar el corrimiento para normalizar la mantissa.`
256	118	jguarin200	`normhighshiftermult:lpm_mult`
257			`generic map ("DEDICATED_MULTIPLIER_CIRCUITRY=YES,MAXIMIZE_SPEED=9","UNSIGNED","LPM_MULT",9,18,27)`
258	119	jguarin200	`port map (s6factorhot9,s6result(24 downto 7),s6ph);`
259	118	jguarin200	`normlowshiftermult:lpm_mult`
260			`generic map ("DEDICATED_MULTIPLIER_CIRCUITRY=YES,MAXIMIZE_SPEED=9","UNSIGNED","LPM_MULT",9,9,18)`
261	119	jguarin200	`port map (s6factorhot9,s6result(06 downto 0)&"00",s6pl);`
262			`s6postshift(22 downto 15) <= s6ph(16 downto 09);`
263	120	jguarin200	`s6postshift(14 downto 06) <= s6ph(08 downto 00) + s6pl(17 downto 09);`
264	119	jguarin200	`s6postshift(05 downto 00) <= s6pl(08 downto 03);`
265	118	jguarin200
266
267
268
269
270	119	jguarin200	`end fadd32_arch;`
271	118	jguarin200
272

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