--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/basic_op.h	Wed Apr 03 05:31:37 2024 +0000
@@ -0,0 +1,62 @@
+/*___________________________________________________________________________
+ |                                                                           |
+ |   Constants and Globals                                                   |
+ |___________________________________________________________________________|
+*/
+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
+
+/*___________________________________________________________________________
+ |                                                                           |
+ |   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  */   
+