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[/] [g729a_codec/] [trunk/] [VHDL/] [G729A_asip_arith_pkg.vhd] - Blame information for rev 2

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-----------------------------------------------------------------
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--                                                             --
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-----------------------------------------------------------------
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--                                                             --
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-- Copyright (C) 2013 Stefano Tonello                          --
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--                                                             --
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-- This source file may be used and distributed without        --
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-- restriction provided that this copyright statement is not   --
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-- removed from the file and that any derivative work contains --
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-- the original copyright notice and the associated disclaimer.--
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--                                                             --
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-- THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY         --
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-- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED   --
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-- TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS   --
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-- FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL THE AUTHOR      --
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-- OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,         --
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-- INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES    --
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-- (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE   --
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-- GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR        --
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-- BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF  --
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-- LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT  --
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-- (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT  --
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-- OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE         --
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-- POSSIBILITY OF SUCH DAMAGE.                                 --
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--                                                             --
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-----------------------------------------------------------------
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---------------------------------------------------------------
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-- Arithmetic operations macros and shifting functions
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---------------------------------------------------------------
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library IEEE;
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use IEEE.std_logic_1164.all;
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use IEEE.numeric_std.all;
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library WORK;
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use WORK.G729A_ASIP_PKG.all;
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use WORK.G729A_ASIP_BASIC_PKG.all;
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package G729A_ASIP_ARITH_PKG is
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  type ADD_CTRL is (
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    AC_ABS,
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    AC_ADD,
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    AC_NEG,
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    AC_SUB,
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    AC_LABS,
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    AC_LADD,
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    AC_LNEG,
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    AC_LSUB,
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    AC_LEXT,
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    AC_RND,
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    AC_INC,
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    AC_DEC,
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    AC_NIL
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  );
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  type MUL_CTRL is (
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    MC_MUL,
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    MC_LMUL,
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    MC_MULA,
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    MC_MULR,
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    MC_LMAC,
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    MC_LMSU,
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    MC_M3216,
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    MC_M32,
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    MC_NIL
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  );
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  type SHF_CTRL is (
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    SC_SHL,
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    SC_SHR,
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    SC_LSHL,
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    SC_LSHR,
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    SC_NRMS,
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    SC_NRML,
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    SC_NIL
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  );
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  type LOG_CTRL is (
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    LC_AND,
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    LC_OR,
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    LC_ANDL,
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    LC_ANDH,
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    LC_ORL,
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    LC_ORH,
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    LC_NIL
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  );
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  function shift_left16(SI : SDWORD_T;SHFT : LONG_SHIFT_T) return SDWORD_T;
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  function shift_right16(SI : SDWORD_T;SHFT : LONG_SHIFT_T) return SDWORD_T;
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  function shift_left32(SI : LDWORD_T;SHFT : LONG_SHIFT_T) return LDWORD_T;
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  function shift_right32(SI : LDWORD_T;SHFT : LONG_SHIFT_T) return LDWORD_T;
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end G729A_ASIP_ARITH_PKG;
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package body G729A_ASIP_ARITH_PKG is
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  function shift_left16(SI : SDWORD_T;SHFT : LONG_SHIFT_T) return SDWORD_T is
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    variable SO : SDWORD_T;
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  begin
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    case SHFT is
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      when  0 => SO := shift_left(SI, 0);
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      when  1 => SO := shift_left(SI, 1);
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      when  2 => SO := shift_left(SI, 2);
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      when  3 => SO := shift_left(SI, 3);
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      when  4 => SO := shift_left(SI, 4);
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      when  5 => SO := shift_left(SI, 5);
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      when  6 => SO := shift_left(SI, 6);
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      when  7 => SO := shift_left(SI, 7);
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      when  8 => SO := shift_left(SI, 8);
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      when  9 => SO := shift_left(SI, 9);
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      when 10 => SO := shift_left(SI,10);
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      when 11 => SO := shift_left(SI,11);
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      when 12 => SO := shift_left(SI,12);
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      when 13 => SO := shift_left(SI,13);
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      when 14 => SO := shift_left(SI,14);
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      when others => SO := shift_left(SI,15);
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    end case;
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    return(SO);
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  end function;
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  function shift_right16(SI : SDWORD_T;SHFT : LONG_SHIFT_T) return SDWORD_T is
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    variable SO : SDWORD_T;
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  begin
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    case SHFT is
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      when  0 => SO := shift_right(SI, 0);
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      when  1 => SO := shift_right(SI, 1);
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      when  2 => SO := shift_right(SI, 2);
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      when  3 => SO := shift_right(SI, 3);
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      when  4 => SO := shift_right(SI, 4);
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      when  5 => SO := shift_right(SI, 5);
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      when  6 => SO := shift_right(SI, 6);
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      when  7 => SO := shift_right(SI, 7);
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      when  8 => SO := shift_right(SI, 8);
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      when  9 => SO := shift_right(SI, 9);
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      when 10 => SO := shift_right(SI,10);
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      when 11 => SO := shift_right(SI,11);
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      when 12 => SO := shift_right(SI,12);
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      when 13 => SO := shift_right(SI,13);
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      when 14 => SO := shift_right(SI,14);
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      when others => SO := shift_right(SI,15);
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    end case;
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    return(SO);
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  end function;
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  function shift_left32(SI : LDWORD_T;SHFT : LONG_SHIFT_T) return LDWORD_T is
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    variable SO : LDWORD_T;
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  begin
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    case SHFT is
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      when  0 => SO := shift_left(SI, 0);
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      when  1 => SO := shift_left(SI, 1);
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      when  2 => SO := shift_left(SI, 2);
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      when  3 => SO := shift_left(SI, 3);
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      when  4 => SO := shift_left(SI, 4);
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      when  5 => SO := shift_left(SI, 5);
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      when  6 => SO := shift_left(SI, 6);
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      when  7 => SO := shift_left(SI, 7);
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      when  8 => SO := shift_left(SI, 8);
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      when  9 => SO := shift_left(SI, 9);
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      when 10 => SO := shift_left(SI,10);
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      when 11 => SO := shift_left(SI,11);
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      when 12 => SO := shift_left(SI,12);
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      when 13 => SO := shift_left(SI,13);
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      when 14 => SO := shift_left(SI,14);
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      when 15 => SO := shift_left(SI,15);
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      when 16 => SO := shift_left(SI,16);
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      when 17 => SO := shift_left(SI,17);
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      when 18 => SO := shift_left(SI,18);
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      when 19 => SO := shift_left(SI,19);
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      when 20 => SO := shift_left(SI,20);
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      when 21 => SO := shift_left(SI,21);
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      when 22 => SO := shift_left(SI,22);
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      when 23 => SO := shift_left(SI,23);
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      when 24 => SO := shift_left(SI,24);
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      when 25 => SO := shift_left(SI,25);
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      when 26 => SO := shift_left(SI,26);
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      when 27 => SO := shift_left(SI,27);
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      when 28 => SO := shift_left(SI,28);
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      when 29 => SO := shift_left(SI,29);
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      when 30 => SO := shift_left(SI,30);
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      when others => SO := shift_left(SI,31);
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    end case;
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    return(SO);
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  end function;
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  function shift_right32(SI : LDWORD_T;SHFT : LONG_SHIFT_T) return LDWORD_T is
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    variable SO : LDWORD_T;
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  begin
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    case SHFT is
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      when  0 => SO := shift_right(SI, 0);
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      when  1 => SO := shift_right(SI, 1);
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      when  2 => SO := shift_right(SI, 2);
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      when  3 => SO := shift_right(SI, 3);
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      when  4 => SO := shift_right(SI, 4);
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      when  5 => SO := shift_right(SI, 5);
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      when  6 => SO := shift_right(SI, 6);
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      when  7 => SO := shift_right(SI, 7);
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      when  8 => SO := shift_right(SI, 8);
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      when  9 => SO := shift_right(SI, 9);
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      when 10 => SO := shift_right(SI,10);
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      when 11 => SO := shift_right(SI,11);
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      when 12 => SO := shift_right(SI,12);
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      when 13 => SO := shift_right(SI,13);
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      when 14 => SO := shift_right(SI,14);
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      when 15 => SO := shift_right(SI,15);
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      when 16 => SO := shift_right(SI,16);
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      when 17 => SO := shift_right(SI,17);
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      when 18 => SO := shift_right(SI,18);
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      when 19 => SO := shift_right(SI,19);
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      when 20 => SO := shift_right(SI,20);
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      when 21 => SO := shift_right(SI,21);
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      when 22 => SO := shift_right(SI,22);
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      when 23 => SO := shift_right(SI,23);
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      when 24 => SO := shift_right(SI,24);
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      when 25 => SO := shift_right(SI,25);
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      when 26 => SO := shift_right(SI,26);
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      when 27 => SO := shift_right(SI,27);
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      when 28 => SO := shift_right(SI,28);
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      when 29 => SO := shift_right(SI,29);
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      when 30 => SO := shift_right(SI,30);
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      when others => SO := shift_right(SI,31);
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    end case;
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    return(SO);
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  end function;
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end G729A_ASIP_ARITH_PKG;

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