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comparison z80.cpu @ 1718:c7d18b8ec29a

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Implemented the rest of the dd/fd prefixes for the add/adc/sub/sbc/inc/dec instructions in new Z80 core
author Michael Pavone <pavone@retrodev.com>
date Wed, 30 Jan 2019 18:55:58 -0800
parents b11cfa655c61
children fb5ae8c20b85
comparison
equal deleted inserted replaced
1717:b11cfa655c61 1718:c7d18b8ec29a
511 511
512 10000RRR add_reg 512 10000RRR add_reg
513 add a main.R a 513 add a main.R a
514 update_flags SZYHVXN0C 514 update_flags SZYHVXN0C
515 515
516 dd 10000100 add_ixh
517 lsr ix 8 scratch1
518 add a scratch1 a
519 update_flags SZYHVXN0C
520
521 dd 10000101 add_ixl
522 and ix 0xFF scratch1
523 add a scratch1 a
524 update_flags SZYHVXN0C
525
526 fd 10000100 add_iyh
527 lsr iy 8 scratch1
528 add a scratch1 a
529 update_flags SZYHVXN0C
530
531 fd 10000101 add_iyl
532 and iy 0xFF scratch1
533 add a scratch1 a
534 update_flags SZYHVXN0C
535
516 10000110 add_hl 536 10000110 add_hl
517 z80_fetch_hl 537 z80_fetch_hl
518 add a scratch1 a 538 add a scratch1 a
519 update_flags SZYHVXN0C 539 update_flags SZYHVXN0C
520 540
561 581
562 00101001 add_hl_hl 582 00101001 add_hl_hl
563 local hlw 16 583 local hlw 16
564 meta hlt hlw 584 meta hlt hlw
565 z80_add16_hl hlw 585 z80_add16_hl hlw
566
567 586
568 00111001 add_hl_sp 587 00111001 add_hl_sp
569 local hlw 16 588 local hlw 16
570 meta hlt hlw 589 meta hlt hlw
571 z80_add16_hl sp 590 z80_add16_hl sp
572 591
592 dd 00001001 add_ix_bc
593 lsl b 8 scratch1
594 or c scratch1 scratch1
595 add scratch1 ix ix
596 update_flags YHXN0C
597
598 dd 00011001 add_ix_de
599 lsl d 8 scratch1
600 or e scratch1 scratch1
601 add scratch1 ix ix
602 update_flags YHXN0C
603
604 dd 00101001 add_ix_ix
605 add ix ix ix
606 update_flags YHXN0C
607
608 dd 00111001 add_ix_sp
609 add sp ix ix
610 update_flags YHXN0C
611
612 fd 00001001 add_iy_bc
613 lsl b 8 scratch1
614 or c scratch1 scratch1
615 add scratch1 iy iy
616 update_flags YHXN0C
617
618 fd 00011001 add_iy_de
619 lsl d 8 scratch1
620 or e scratch1 scratch1
621 add scratch1 iy iy
622 update_flags YHXN0C
623
624 fd 00101001 add_iy_iy
625 add iy iy iy
626 update_flags YHXN0C
627
628 fd 00111001 add_iy_sp
629 add sp iy iy
630 update_flags YHXN0C
631
573 10001RRR adc_reg 632 10001RRR adc_reg
574 adc a main.R a 633 adc a main.R a
575 update_flags SZYHVXN0C 634 update_flags SZYHVXN0C
635
636 dd 10001100 adc_ixh
637 lsr ix 8 scratch1
638 adc a scratch1 a
639 update_flags SZYHVXN0C
640
641 dd 10001101 adc_ixl
642 and ix 0xFF scratch1
643 adc a scratch1 a
644 update_flags SZYHVXN0C
645
646 fd 10001100 adc_iyh
647 lsr iy 8 scratch1
648 adc a scratch1 a
649 update_flags SZYHVXN0C
650
651 fd 10001101 adc_iyl
652 and iy 0xFF scratch1
653 adc a scratch1 a
654 update_flags SZYHVXN0C
576 655
577 10001110 adc_hl 656 10001110 adc_hl
578 z80_fetch_hl 657 z80_fetch_hl
658 adc a scratch1 a
659 update_flags SZYHVXN0C
660
661 dd 10001110 adc_ixd
662 z80_fetch_index ix
663 adc a scratch1 a
664 update_flags SZYHVXN0C
665
666 fd 10001110 adc_iyd
667 z80_fetch_index iy
579 adc a scratch1 a 668 adc a scratch1 a
580 update_flags SZYHVXN0C 669 update_flags SZYHVXN0C
581 670
582 11001110 adc_immed 671 11001110 adc_immed
583 z80_fetch_immed 672 z80_fetch_immed
623 712
624 10010RRR sub_reg 713 10010RRR sub_reg
625 sub main.R a a 714 sub main.R a a
626 update_flags SZYHVXN1C 715 update_flags SZYHVXN1C
627 716
717 dd 10010100 sub_ixh
718 lsr ix 8 scratch1
719 sub scratch1 a a
720 update_flags SZYHVXN1C
721
722 dd 10010101 sub_ixl
723 and ix 0xFF scratch1
724 sub scratch1 a a
725 update_flags SZYHVXN1C
726
727 fd 10010100 sub_iyh
728 lsr iy 8 scratch1
729 sub scratch1 a a
730 update_flags SZYHVXN1C
731
732 fd 10010101 sub_iyl
733 and iy 0xFF scratch1
734 sub scratch1 a a
735 update_flags SZYHVXN1C
736
628 10010110 sub_hl 737 10010110 sub_hl
629 z80_fetch_hl 738 z80_fetch_hl
630 sub scratch1 a a 739 sub scratch1 a a
631 update_flags SZYHVXN1C 740 update_flags SZYHVXN1C
741
742 dd 10010110 sub_ixd
743 z80_fetch_index ix
744 sub scratch1 a a
745 update_flags SZYHVXN1C
746
747 fd 10010110 sub_iyd
748 z80_fetch_index iy
749 sub scratch1 a a
750 update_flags SZYHVXN1C
632 751
633 11010110 sub_immed 752 11010110 sub_immed
634 z80_fetch_immed 753 z80_fetch_immed
635 sub scratch1 a a 754 sub scratch1 a a
636 update_flags SZYHVXN1C 755 update_flags SZYHVXN1C
637 756
638 10011RRR sbc_reg 757 10011RRR sbc_reg
639 sbc main.R a a 758 sbc main.R a a
640 update_flags SZYHVXN1C 759 update_flags SZYHVXN1C
641 760
761 dd 10011100 sbc_ixh
762 lsr ix 8 scratch1
763 sbc scratch1 a a
764 update_flags SZYHVXN1C
765
766 dd 10011101 sbc_ixl
767 and ix 0xFF scratch1
768 sbc scratch1 a a
769 update_flags SZYHVXN1C
770
771 fd 10011100 sbc_iyh
772 lsr iy 8 scratch1
773 sbc scratch1 a a
774 update_flags SZYHVXN1C
775
776 fd 10011101 sbc_iyl
777 and iy 0xFF scratch1
778 sbc scratch1 a a
779 update_flags SZYHVXN1C
780
781
642 10011110 sbc_hl 782 10011110 sbc_hl
643 z80_fetch_hl 783 z80_fetch_hl
784 sbc scratch1 a a
785 update_flags SZYHVXN1C
786
787 dd 10011110 sbc_ixd
788 z80_fetch_index ix
789 sbc scratch1 a a
790 update_flags SZYHVXN1C
791
792 fd 10011110 sbc_iyd
793 z80_fetch_index iy
644 sbc scratch1 a a 794 sbc scratch1 a a
645 update_flags SZYHVXN1C 795 update_flags SZYHVXN1C
646 796
647 11011110 sbc_immed 797 11011110 sbc_immed
648 z80_fetch_immed 798 z80_fetch_immed
743 update_flags SZYHVXN1C 893 update_flags SZYHVXN1C
744 894
745 00RRR100 inc_reg 895 00RRR100 inc_reg
746 add 1 main.R main.R 896 add 1 main.R main.R
747 update_flags SZYHVXN0 897 update_flags SZYHVXN0
898
899 dd 00100100 inc_ixh
900 add 0x100 ix ix
901 update_flags SZYHVXN0
902
903 dd 00101100 inc_ixl
904 local tmp 8
905 mov ix tmp
906 add 1 tmp tmp
907 update_flags SZYHVXN0
908 and 0xFF00 ix ix
909 or tmp ix ix
910
911 fd 00100100 inc_iyh
912 add 0x100 iy iy
913 update_flags SZYHVXN0
914
915 fd 00101100 inc_iyl
916 local tmp 8
917 mov iy tmp
918 add 1 tmp tmp
919 update_flags SZYHVXN0
920 and 0xFF00 iy iy
921 or tmp iy iy
748 922
749 00110100 inc_hl 923 00110100 inc_hl
750 local tmp 8 924 local tmp 8
751 z80_fetch_hl 925 z80_fetch_hl
752 #TODO: Either make DSL compiler smart enough to optimize these unnecessary moves out 926 #TODO: Either make DSL compiler smart enough to optimize these unnecessary moves out
811 985
812 00RRR101 dec_reg 986 00RRR101 dec_reg
813 sub 1 main.R main.R 987 sub 1 main.R main.R
814 update_flags SZYHVXN1 988 update_flags SZYHVXN1
815 989
990 dd 00100101 dec_ixh
991 sub 0x100 ix ix
992 update_flags SZYHVXN1
993
994 dd 00101101 dec_ixl
995 local tmp 8
996 mov ix tmp
997 sub 1 tmp tmp
998 update_flags SZYHVXN1
999 and 0xFF00 ix ix
1000 or tmp ix ix
1001
1002 fd 00100101 dec_iyh
1003 sub 0x100 iy iy
1004 update_flags SZYHVXN1
1005
1006 fd 00101101 dec_iyl
1007 local tmp 8
1008 mov iy tmp
1009 sub 1 tmp tmp
1010 update_flags SZYHVXN1
1011 and 0xFF00 iy iy
1012 or tmp iy iy
1013
816 00110101 dec_hl 1014 00110101 dec_hl
817 z80_fetch_hl 1015 z80_fetch_hl
818 #TODO: fix size 1016 #TODO: fix size
819 sub 1 scratch1 scratch1 1017 sub 1 scratch1 scratch1
820 update_flags SZYHVXN1 1018 update_flags SZYHVXN1