diff options
Diffstat (limited to 'main.asm')
| -rw-r--r-- | main.asm | 29 |
1 files changed, 7 insertions, 22 deletions
@@ -667,16 +667,13 @@ emu_op_28: ;; SPEED can be made faster ;; No flags bsr f_norm_z - beq end_28 - FETCHBI d1 - add.w d1,a6 ; XXX deref? -end_28: + bne emu_op_18 DONE START emu_op_29: ;; ADD HL,HL - ;; Flags: + ;; No flags F_ADD_W d6,d6 DONE @@ -726,14 +723,7 @@ emu_op_30: ;; If carry clear ;; PC <- PC+immed.b bsr f_norm_c - bne end_30 ; branch taken: carry set - FETCHBI d1 - move a6,a0 - bsr underef - add.w d1,d0 ; ??? Can I avoid underef/deref cycle? - bsr deref - move a0,a6 -end_30: + beq emu_op_18 ; branch taken: carry clear DONE START @@ -756,8 +746,9 @@ emu_op_32: emu_op_33: ;; INC SP ;; No flags + ;; ;; FYI: Do not have to deref because this will never cross a - ;; page boundary. + ;; page boundary. So sayeth BrandonW. addq.w #1,a4 DONE @@ -805,10 +796,7 @@ emu_op_38: ;; If carry set ;; PC <- PC+immed.b bsr f_norm_c - beq end_38 - FETCHBI d1 - add.w d1,a6 ; XXX deref? -end_38: + bne emu_op_18 DONE START @@ -1441,7 +1429,6 @@ F_ADC_B MACRO ; S34 emu_op_88: ;; ADC A,B ;; A <- A + B + (carry) - ;; XXX fix this shit up LOHI d4 F_ADC_B d4,d3 HILO d4 @@ -1451,14 +1438,12 @@ emu_op_88: emu_op_89: ;; ADC A,C ;; A <- A + C + (carry) - ;; XXX fix this shit up F_ADC_B d4,d3 DONE START emu_op_8a: ;; ADC A,D - ;; XXX fix this shit up LOHI d5 F_ADC_B d5,d3 HILO d5 @@ -1505,7 +1490,7 @@ emu_op_8f: ;; Do a SUB \2,\1 ;; XXX CHECK -F_SUB_B MACRO ;22 bytes? +F_SUB_B MACRO ; 22 bytes? ;; XXX use lea and then d(an) if you have a spare register. move.b \1,(f_tmp_src_b).w ; preserve operands for flagging move.b \2,(f_tmp_dst_b).w |