ref: 4aa76b22c3cdd8ae415bf8f9a1b196e505fa2bae
dir: /amr-wb/basic_op.h/
/*___________________________________________________________________________
| |
| Constants and Globals |
| |
| $Id $
|___________________________________________________________________________|
*/
extern Flag Overflow;
extern Flag Carry;
#define MAX_32 (Word32)0x7fffffffL
#define MIN_32 (Word32)0x80000000L
#define MAX_16 (Word16)+32767 /* 0x7fff */
#define MIN_16 (Word16)-32768 /* 0x8000 */
/*___________________________________________________________________________
| |
| 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 */
#define L_mult(a,b) ((a)*(b)<<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_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 */