diff options
| author | Duncan Smith | 2010-09-13 21:30:29 -0700 |
|---|---|---|
| committer | Duncan Smith | 2010-09-13 21:30:29 -0700 |
| commit | 74d38ba166745b9006b510f85db0ab5765b5c232 (patch) | |
| tree | 30c7ba71d9bec2f03719a06ce760d1b418f6299a /opcodes.asm | |
| parent | e5517cd4e09f755c9ed959cc58968aaf81d67631 (diff) | |
Speed improvements to some instructions.
Diffstat (limited to 'opcodes.asm')
| -rw-r--r-- | opcodes.asm | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/opcodes.asm b/opcodes.asm index f887f81..3305135 100644 --- a/opcodes.asm +++ b/opcodes.asm @@ -729,7 +729,7 @@ emu_op_3e: START emu_op_3f: ;; CCF - ;; Toggle carry flag + ;; Clear carry flag bsr flags_normalize ;; SZ5H3PNC eor.b #%00010001,flag_byte-flag_storage(a3) @@ -747,11 +747,9 @@ emu_op_40: START emu_op_41: ;; LD B,C - ;; SPEED - move.b ebc,d1 - LOHI ebc + move.w ebc,d1 + LOHI d1 move.b d1,ebc - HILO ebc DONE ;nok START @@ -779,6 +777,7 @@ emu_op_43: emu_op_44: ;; LD B,H ;; B <- H + ;; SPEED LOHI ebc LOHI ehl move.b ehl,ebc @@ -826,6 +825,7 @@ emu_op_48: START emu_op_49: ;; LD C,C + move.b ebc,ebc DONE ;nok START @@ -971,6 +971,7 @@ emu_op_5a: START emu_op_5b: ;; LD E,E + move.b ede,ede DONE ;nok START @@ -1038,6 +1039,9 @@ emu_op_63: START emu_op_64: ;; LD H,H + LOHI ehl + move.b ehl,ehl + HILO ehl DONE ;nok START @@ -1098,15 +1102,15 @@ emu_op_6b: START emu_op_6c: ;; LD L,H - LOHI ehl move.b ehl,d1 - HILO ehl + LOHI d1 move.b d1,ehl DONE ;nok START emu_op_6d: ;; LD L,L + move.b ehl,ehl DONE ;nok START @@ -1770,7 +1774,7 @@ emu_op_be: emu_op_bf: ;; CP A F_CP_B eaf,eaf - DONE ;nok + DONE START emu_op_c0: |