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[/] [raytrac/] [trunk/] [fpbranch/] [invr/] [invr32.vhd] - Rev 116
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library ieee; use ieee.std_logic_1164.all; use ieee.std_logic_unsigned.all; entity invr32 is port ( clk : in std_logic; dvd32: in std_logic_vector(31 downto 0); qout32: out std_logic_vector(31 downto 0) ); end invr32; architecture invr32_arch of invr32 is component altsyncram generic ( address_aclr_a : string; clock_enable_input_a : string; clock_enable_output_a : string; init_file : string; intended_device_family : string; lpm_hint : string; lpm_type : string; numwords_a : natural; operation_mode : string; outdata_aclr_a : string; outdata_reg_a : string; widthad_a : natural; width_a : natural; width_byteena_a : natural ); port ( clock0 : in std_logic ; address_a : in std_logic_vector (9 downto 0); q_a : out std_logic_vector (17 downto 0) ); end component; signal s0sgn : std_logic; signal s0uexp,s0e129 : std_logic_vector(7 downto 0); signal s0q : std_logic_vector(17 downto 0); begin altsyncram_component : altsyncram generic map ( address_aclr_a => "NONE", clock_enable_input_a => "BYPASS", clock_enable_output_a => "BYPASS", init_file => "X:/Tesis/Workspace/hw/rt_lib/arith/src/trunk/fpbranch/invr/meminvr.mif", intended_device_family => "Cyclone III", lpm_hint => "ENABLE_RUNTIME_MOD=NO", lpm_type => "altsyncram", numwords_a => 1024, operation_mode => "ROM", outdata_aclr_a => "NONE", outdata_reg_a => "UNREGISTERED", widthad_a => 10, width_a => 18, width_byteena_a => 1 ) port map ( clock0 => clk, address_a => dvd32(22 downto 13), q_a => s0q ); --! SNAN? process (clk) begin if clk'event and clk='1' then --!Carga de Operando. s0sgn <= dvd32(31); s0uexp <= dvd32(30 downto 23); --! Etapa 0: Calcular dirección a partir del exponente, salida y normalización de la mantissa. qout32(31) <= s0sgn; if s0q(17)='1' then qout32(22 downto 7) <= (others => '0'); qout32(30 downto 23) <= s0e129+255; else qout32(22 downto 7) <= s0q(15 downto 0); qout32(30 downto 23) <= s0e129+254; end if; end if; end process; --! Combinatorial Gremlin: Etapa 0, calculo del exponente. process(s0uexp) begin for i in 7 downto 0 loop s0e129(i)<=not(s0uexp(i)); end loop; end process; qout32(6 downto 0) <= (others => '0'); end invr32_arch;
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