From 3c015cdfccfc5bce6bcce94da5e25972d7b09fb4 Mon Sep 17 00:00:00 2001
From: Duncan Smith
Date: Sat, 12 Jun 2010 15:38:33 -0700
Subject: I'm not sure where this changeset came from, but it looks good ...

---
 main.asm | 38 +++++++++++++++++++++++++-------------
 1 file changed, 25 insertions(+), 13 deletions(-)

(limited to 'main.asm')

diff --git a/main.asm b/main.asm
index 507e8ef..c4197bc 100644
--- a/main.asm
+++ b/main.asm
@@ -157,26 +157,22 @@ HILO	MACRO			; 22 cycles, 2 bytes
 	rol.w	#8,\1
 	ENDM
 
+
 	;; calc84maniac suggests putting emu_fetch into this in order
 	;; to save 8 cycles per instruction, at the expense of code
 	;; size
-DONE	MACRO			; 8 cycles, 2 bytes
-	jmp	(a2)
+	;;
+	;; See if I can get rid of the eor
+DONE	MACRO
+	eor.w	d0,d0		; 4 cycles
+	move.b	(a4)+,d0	; 8 cycles
+	rol.w	#5,d0		; 4 cycles   adjust to actual alignment
+	jmp	0(a3,d0)	;14 cycles
+	;; overhead:		 30 cycles
 	ENDM
 
 	;; == Special Opcode Macros ========================================
 
-	;; Do a SUB \2,\1
-F_SUB_B	MACRO			;14 bytes?
-;; XXX use lea and then d(an) if you have a spare register.
-	move.b	\1,f_tmp_src_b	; preserve operands for flagging
-	move.b	\2,f_tmp_dst_b
-	move.b	#1,flag_n
-	move.b	#1,f_tmp_byte
-	sub	\1,\2
-	move	sr,f_host_ccr
-	ENDM
-
 
 	;; Do an ADD \1,\2
 F_ADD_W	MACRO
@@ -1448,6 +1444,22 @@ emu_op_8f:
 	F_ADD_B	d3,d3
 	DONE
 
+
+
+
+
+	;; Do a SUB \2,\1
+	;; XXX CHECK
+F_SUB_B	MACRO			;14 bytes?
+	;; XXX use lea and then d(an) if you have a spare register.
+	move.b	\1,f_tmp_src_b	; preserve operands for flagging
+	move.b	\2,f_tmp_dst_b
+	move.b	#1,flag_n
+	move.b	#1,f_tmp_byte
+	sub	\1,\2
+	move	sr,f_host_ccr
+	ENDM
+
 	START
 emu_op_90:
 	;; SUB	A,B
-- 
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