| Line 49... |
Line 49... |
);
|
);
|
end G729A_ASIP_ADDSUB_PIPEB;
|
end G729A_ASIP_ADDSUB_PIPEB;
|
|
|
architecture ARC of G729A_ASIP_ADDSUB_PIPEB is
|
architecture ARC of G729A_ASIP_ADDSUB_PIPEB is
|
|
|
constant ZERO : LDWORD_T := to_signed(0,LDLEN);
|
|
constant ONE : LDWORD_T := to_signed(1,LDLEN);
|
|
|
|
component G729A_ASIP_ADDER_F is
|
component G729A_ASIP_ADDER_F is
|
generic(
|
generic(
|
LEN1 : integer := 16;
|
LEN1 : integer := 16;
|
LEN2 : integer := 16
|
LEN2 : integer := 16
|
);
|
);
|
| Line 74... |
Line 71... |
XS(S'HIGH downto 0) := S;
|
XS(S'HIGH downto 0) := S;
|
XS(L-1 downto S'HIGH+1) := (others => S(S'HIGH));
|
XS(L-1 downto S'HIGH+1) := (others => S(S'HIGH));
|
return(XS);
|
return(XS);
|
end function;
|
end function;
|
|
|
signal IOPA,IOPB,CI,SUM : LDWORD_T;
|
signal IOPA,IOPB,SUM : LDWORD_T;
|
|
signal CI : std_logic;
|
|
|
begin
|
begin
|
|
|
-- adder operands selection
|
-- adder operands selection
|
process(CTRL_i,OPB_i,OPA_i)
|
process(CTRL_i,OPB_i,OPA_i)
|
begin
|
begin
|
case CTRL_i is
|
case CTRL_i is
|
when AC_ABS|AC_NEG =>
|
when AC_ABS|AC_NEG =>
|
-- tmp = -opa_i
|
-- tmp = -opa_i
|
IOPA <= not(EXTS(OPA_i(SDLEN-1 downto 0),LDLEN));
|
IOPA <= not(EXTS(OPA_i(SDLEN-1 downto 0),LDLEN));
|
IOPB <= ZERO;
|
IOPB <= (others => '0');
|
CI <= ONE;
|
CI <= '1';
|
when AC_LABS|AC_LNEG =>
|
when AC_LABS|AC_LNEG =>
|
-- tmp = -opa_i
|
-- tmp = -opa_i
|
IOPA <= not(OPA_i);
|
IOPA <= not(OPA_i);
|
IOPB <= ZERO;
|
IOPB <= (others => '0');
|
CI <= ONE;
|
CI <= '1';
|
--when AC_ADD =>
|
--when AC_ADD =>
|
-- -- tmp = opa_i + opb_i
|
-- -- tmp = opa_i + opb_i
|
-- IOPA <= EXTS(OPA_i(SDLEN-1 downto 0),LDLEN);
|
-- IOPA <= EXTS(OPA_i(SDLEN-1 downto 0),LDLEN);
|
-- IOPB <= EXTS(OPB_i(SDLEN-1 downto 0),LDLEN);
|
-- IOPB <= EXTS(OPB_i(SDLEN-1 downto 0),LDLEN);
|
-- CI <= ZERO;
|
-- CI <= '0';
|
when AC_LADD =>
|
when AC_LADD =>
|
-- tmp = opa_i + opb_i
|
-- tmp = opa_i + opb_i
|
IOPA <= OPA_i;
|
IOPA <= OPA_i;
|
IOPB <= OPB_i;
|
IOPB <= OPB_i;
|
CI <= ZERO;
|
CI <= '0';
|
--when AC_SUB =>
|
--when AC_SUB =>
|
-- -- tmp = opa_i - opb_i
|
-- -- tmp = opa_i - opb_i
|
-- IOPA <= EXTS(OPA_i(SDLEN-1 downto 0),LDLEN);
|
-- IOPA <= EXTS(OPA_i(SDLEN-1 downto 0),LDLEN);
|
-- IOPB <= not(EXTS(OPB_i(SDLEN-1 downto 0),LDLEN));
|
-- IOPB <= not(EXTS(OPB_i(SDLEN-1 downto 0),LDLEN));
|
-- CI <= ONE;
|
-- CI <= '1';
|
when AC_LSUB =>
|
when AC_LSUB =>
|
-- tmp = opa_i - opb_i
|
-- tmp = opa_i - opb_i
|
IOPA <= OPA_i;
|
IOPA <= OPA_i;
|
IOPB <= not(OPB_i);
|
IOPB <= not(OPB_i);
|
CI <= ONE;
|
CI <= '1';
|
when AC_LEXT =>
|
when AC_LEXT =>
|
-- tmp = opa_i - (opa_i(31:16)<<16)
|
-- tmp = opa_i - (opa_i(31:16)<<16)
|
IOPA <= OPA_i;
|
IOPA <= OPA_i;
|
IOPB <= not(OPA_i(LDLEN-1 downto SDLEN) & to_signed(0,SDLEN));
|
IOPB <= not(OPA_i(LDLEN-1 downto SDLEN) & to_signed(0,SDLEN));
|
CI <= ONE;
|
CI <= '1';
|
when others => -- RND
|
when others => -- RND
|
-- tmp = opa_i + 0x00008000
|
-- tmp = opa_i + 0x00008000
|
IOPA <= OPA_i;
|
IOPA <= OPA_i;
|
IOPB <= (SDLEN-1 => '1',others => '0');
|
IOPB <= (SDLEN-1 => '1',others => '0');
|
CI <= ZERO;
|
CI <= '0';
|
--when AC_INC =>
|
--when AC_INC =>
|
-- -- tmp = opa_i + 1
|
-- -- tmp = opa_i + 1
|
-- IOPA <= EXTS(OPA_i(SDLEN-1 downto 0),LDLEN);
|
-- IOPA <= EXTS(OPA_i(SDLEN-1 downto 0),LDLEN);
|
-- IOPB <= (0 => '1',others => '0');
|
-- IOPB <= (0 => '1',others => '0');
|
-- CI <= ZERO;
|
-- CI <= '0';
|
--when others => -- DEC
|
--when others => -- DEC
|
-- -- tmp = opa_i - 1
|
-- -- tmp = opa_i - 1
|
-- IOPA <= EXTS(OPA_i(SDLEN-1 downto 0),LDLEN);
|
-- IOPA <= EXTS(OPA_i(SDLEN-1 downto 0),LDLEN);
|
-- IOPB <= (others => '1');
|
-- IOPB <= (others => '1');
|
-- CI <= ZERO;
|
-- CI <= '0';
|
end case;
|
end case;
|
end process;
|
end process;
|
|
|
-- adder
|
-- adder
|
|
|
| Line 145... |
Line 143... |
LEN2 => SDLEN
|
LEN2 => SDLEN
|
)
|
)
|
port map(
|
port map(
|
OPA_i => IOPA,
|
OPA_i => IOPA,
|
OPB_i => IOPB,
|
OPB_i => IOPB,
|
CI_i => CI(0),
|
CI_i => CI,
|
SUM_o => SUM
|
SUM_o => SUM
|
);
|
);
|
|
|
-- result and overflow flag generation
|
-- result and overflow flag generation
|
process(CTRL_i,OPA_i,OPB_i,SUM)
|
process(CTRL_i,OPA_i,OPB_i,SUM)
|
