basop32.h

G.722.1 fixed codec arithmetic

/*
  ===========================================================================
   File: BASOP.H                                         v.1.1 - 05.Jul.2000
  ===========================================================================

		      ITU-T STL  BASIC OPERATORS

 		      GLOBAL FUNCTION PROTOTYPES

   History:
   26.Jan.00	v1.0	Incorporated to the STL from updated G.723.1/G.729 
                        basic operator library (based on basic_op.h) and 
                        G.723.1's basop.h.
   05.Jul.00    v1.1    Added 32-bit shiftless mult/mac/msub operators
  ============================================================================
*/

#ifndef BASOP_H_DEFINED
#define BASOP_H_DEFINED 110

/*___________________________________________________________________________
 |                                                                           |
 |   Constants and Globals                                                   |
 |                                                                           |
 | $Id $
 |___________________________________________________________________________|
*/

extern Flag Overflow;
extern Flag Carry;

#define MAX_32 (Word32)0x7fffffffL
#define MIN_32 (Word32)0x80000000L

#define MAX_16 (Word16)0x7fff
#define MIN_16 (Word16)0x8000

#define UMAX_32 (Word32)0xffffffffL
#define UMIN_32 (Word32)0x00000000L

/*___________________________________________________________________________
 |                                                                           |
 |   Prototypes for basic arithmetic operators                               |
 |___________________________________________________________________________|
*/

Word16 add (Word16 var1, Word16 var2);    /* Short add,           1   */
Word16 sub (Word16 var1, Word16 var2);    /* Short sub,           1   */
Word16 abs_s (Word16 var1);               /* Short abs,           1   */
Word16 shl (Word16 var1, Word16 var2);    /* Short shift left,    1   */
Word16 shr (Word16 var1, Word16 var2);    /* Short shift right,   1   */
Word16 mult (Word16 var1, Word16 var2);   /* Short mult,          1   */
Word32 L_mult (Word16 var1, Word16 var2); /* Long mult,           1   */
Word16 negate (Word16 var1);              /* Short negate,        1   */
Word16 extract_h (Word32 L_var1);         /* Extract high,        1   */
Word16 extract_l (Word32 L_var1);         /* Extract low,         1   */
Word16 round (Word32 L_var1);             /* Round,               1   */
Word32 L_mac (Word32 L_var3, Word16 var1, Word16 var2);   /* Mac,  1  */
Word32 L_msu (Word32 L_var3, Word16 var1, Word16 var2);   /* Msu,  1  */
Word32 L_macNs (Word32 L_var3, Word16 var1, Word16 var2); /* Mac without
                                                             sat, 1   */
Word32 L_msuNs (Word32 L_var3, Word16 var1, Word16 var2); /* Msu without
                                                             sat, 1   */
Word32 L_add (Word32 L_var1, Word32 L_var2);    /* Long add,        2 */
Word32 L_sub (Word32 L_var1, Word32 L_var2);    /* Long sub,        2 */
Word32 L_add_c (Word32 L_var1, Word32 L_var2);  /* Long add with c, 2 */
Word32 L_sub_c (Word32 L_var1, Word32 L_var2);  /* Long sub with c, 2 */
Word32 L_negate (Word32 L_var1);                /* Long negate,     2 */
Word16 mult_r (Word16 var1, Word16 var2);       /* Mult with round, 2 */
Word32 L_shl (Word32 L_var1, Word16 var2);      /* Long shift left, 2 */
Word32 L_shr (Word32 L_var1, Word16 var2);      /* Long shift right, 2*/
Word16 shr_r (Word16 var1, Word16 var2);        /* Shift right with
                                                   round, 2           */
Word16 mac_r (Word32 L_var3, Word16 var1, Word16 var2); /* Mac with
                                                           rounding,2 */
Word16 msu_r (Word32 L_var3, Word16 var1, Word16 var2); /* Msu with
                                                           rounding,2 */
Word32 L_deposit_h (Word16 var1);        /* 16 bit var1 -> MSB,     2 */
Word32 L_deposit_l (Word16 var1);        /* 16 bit var1 -> LSB,     2 */

Word32 L_shr_r (Word32 L_var1, Word16 var2); /* Long shift right with
                                                round,  3             */
Word32 L_abs (Word32 L_var1);            /* Long abs,              3  */
Word32 L_sat (Word32 L_var1);            /* Long saturation,       4  */
Word16 norm_s (Word16 var1);             /* Short norm,           15  */
Word16 div_s (Word16 var1, Word16 var2); /* Short division,       18  */
Word16 norm_l (Word32 L_var1);           /* Long norm,            30  */   

/*
   Additional G.723.1 operators
*/
Word32 L_mls( Word32, Word16 ) ;    /* Weight FFS; currently assigned 1 */
Word16 div_l( Word32, Word16 ) ;    /* Weight FFS; currently assigned 1 */
Word16 i_mult(Word16 a, Word16 b);  /* Weight FFS; currently assigned 1 */

/* 
    New shiftless operators, not used in G.729/G.723.1
*/
Word32 L_mult0(Word16 v1, Word16 v2); /* 32-bit Multiply w/o shift         1 */
Word32 L_mac0(Word32 L_v3, Word16 v1, Word16 v2); /* 32-bit Mac w/o shift  1 */
Word32 L_msu0(Word32 L_v3, Word16 v1, Word16 v2); /* 32-bit Msu w/o shift  1 */

/* 
    Additional G.722.1 operators
*/
UWord32 LU_shl (UWord32 L_var1, Word16 var2);
UWord32 LU_shr (UWord32 L_var1, Word16 var2);
#endif /* BASOP_H_DEFINED */


/* ************************* END OF BASIC_OP.H ************************* */