38 * Carry Chain Calculation
43 * flag is the XOR of the top two bits of the carry chain for an
46 * carry chain given the two operands and the result.
49 * bits, we can derive a formula for the carry chain.
246     /* calculate the carry chain  SEE NOTE AT TOP. */  in adc_byte()
273     /* calculate the carry chain  SEE NOTE AT TOP. */  in adc_word()
307     /* calculate the carry chain  SEE NOTE AT TOP. */  in adc_long()
330     /* calculate the carry chain  SEE NOTE AT TOP. */  in add_byte()
353     /* calculate the carry chain  SEE NOTE AT TOP. */  in add_word()
381     /* calculate the carry chain  SEE NOTE AT TOP. */  in add_long()
584     /* carry flag unchanged */  in dec_byte()
608     /* carry flag unchanged */  in dec_word()
632     /* carry flag unchanged */  in dec_long()
653     /* calculate the carry chain  SEE NOTE AT TOP. */  in inc_byte()
675     /* calculate the carry chain  SEE NOTE AT TOP. */  in inc_word()
697     /* calculate the carry chain  SEE NOTE AT TOP. */  in inc_long()
733     /* set the carry flag to be bit 8 */  in or_word()
754     /* set the carry flag to be bit 8 */  in or_long()
888        want to rotate through the carry by "s" bits.  We could  in rcl_byte()
892        The new carry flag   (was B_n)  in rcl_byte()
897        for a rotation of n bits (mod 9) the new carry flag is  in rcl_byte()
911         /* extract the new CARRY FLAG. */  in rcl_byte()
930         /* if the carry flag was set, or it in.  */  in rcl_byte()
931         if (ACCESS_FLAG(F_CF)) {        /* carry flag is set */  in rcl_byte()
935         /* set the new carry flag, based on the variable "cf" */  in rcl_byte()
986         if (ACCESS_FLAG(F_CF)) {        /* carry flag is set */  in rcl_long()
1005     /* rotate right through carry */  in rcr_byte()
1015        for a rotation of n bits (mod 9) the new carry flag is  in rcr_byte()
1029         /* extract the new CARRY FLAG. */  in rcr_byte()
1063         /* if the carry flag was set, or it in.  */  in rcr_byte()
1064         if (ACCESS_FLAG(F_CF)) {        /* carry flag is set */  in rcr_byte()
1068         /* set the new carry flag, based on the variable "cf" */  in rcr_byte()
1090     /* rotate right through carry */  in rcr_word()
1123     /* rotate right through carry */  in rcr_long()
1136         if (ACCESS_FLAG(F_CF)) {        /* carry flag is set */  in rcr_long()
1181         /* set the new carry flag, Note that it is the low order  in rol_byte()
1190         /* set the new carry flag, Note that it is the low order  in rol_byte()
1216         /* set the new carry flag, Note that it is the low order  in rol_word()
1242         /* set the new carry flag, Note that it is the low order  in rol_long()
1282         /* set the new carry flag, Note that it is the low order  in ror_byte()
1290         /* set the new carry flag, Note that it is the low order  in ror_byte()
1315         /* set the new carry flag, Note that it is the low order  in ror_word()
1340         /* set the new carry flag, Note that it is the low order  in ror_long()
1359         /* last bit shifted out goes into carry flag */  in shl_byte()
2416     int carry;  in idiv_long()
2424         carry = (l_dvd >= l_s) ? 0 : 1;  in idiv_long()
2426         if (abs_h_dvd < (h_s + carry)) {  in idiv_long()
2432             abs_h_dvd -= (h_s + carry);  in idiv_long()
2433             l_dvd = carry ? ((0xFFFFFFFF - l_s) + l_dvd + 1)  in idiv_long()
2544     int carry;  in div_long()
2552         carry = (l_dvd >= l_s) ? 0 : 1;  in div_long()
2554         if (h_dvd < (h_s + carry)) {  in div_long()
2560             h_dvd -= (h_s + carry);  in div_long()
2561             l_dvd = carry ? ((0xFFFFFFFF - l_s) + l_dvd + 1)  in div_long()