101   R2 = R2.L (Z);  define
112   R2 = -R1;  define
114   R2 = R0 << 1;                   /* R2 lsw of dividend  */  define
119   R2 = R2 | R5;                   /* Shift quotient bit */  define
124         R2 = R2 << 1;             /* Shift 64 bit dividend up by 1 bit */  define
149   R2 = -1 (X);  define
154   R2 = 1 (Z);  define
157   R2 = R0;                        /* assume divide by 1 => numerator */  define
162   R2 = -R2;  define
180   R2 = R0 >> 31;  define
190   R2 = -R0;                       // negate result if necessary  define