diff options
| -rw-r--r-- | main.asm | 26 |
1 files changed, 16 insertions, 10 deletions
@@ -159,18 +159,24 @@ HILO MACRO ; 22 cycles, 2 bytes rol.w #8,\1 ENDM + ;; Rearrange a register: ABCD -> ACBD. +WORD MACRO + move.l \1,-(a7) ;12 cycles / 2 bytes + movep.w 0(a7),\1 ;16 cycles / 4 bytes + swap \1 ; 4 cycles / 2 bytes + movep.w 1(a7),\1 ;16 cycles / 4 bytes + addq #4,a7 ; 4 cycles / 2 bytes + ;; overhead: 52 cycles /14 bytes + ENDM - ;; calc84maniac suggests putting emu_fetch into this in order - ;; to save 8 cycles per instruction, at the expense of code - ;; size - ;; - ;; See if I can get rid of the eor + + ;; This is run at the end of every instruction routine. DONE MACRO - clr.w d0 ; 4 cycles - move.b (a4)+,d0 ; 8 cycles - rol.w #5,d0 ;16 cycles - jmp 0(a5,d0.w) ;14 cycles - ;; overhead: 42 cycles + clr.w d0 ; 4 cycles / 2 bytes + move.b (a4)+,d0 ; 8 cycles / 2 bytes + rol.w #5,d0 ;16 cycles / 2 bytes + jmp 0(a5,d0.w) ;14 cycles / 4 bytes + ;; overhead: 42 cycles /10 bytes ENDM ;; == Special Opcode Macros ======================================== |