From 760f03cfdc45222f71cd0458e722b9c915f7e681 Mon Sep 17 00:00:00 2001
From: Duncan Smith
Date: Mon, 14 Jun 2010 20:26:49 -0700
Subject: Done with my first pass through the 1-byte opcodes.

---
 flags.asm | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'flags.asm')

diff --git a/flags.asm b/flags.asm
index aa04118..928a6e7 100644
--- a/flags.asm
+++ b/flags.asm
@@ -84,6 +84,18 @@ FNPV_ok:
 	andi.b	#%00000100,d1
 	rts
 
+	;; Normalize and return Sign bit (loaded into Z bit).
+	;; Destroys d1
+f_norm_sign:
+	move.b	flag_valid-flag_storage(a3),d1
+	andi.b	#%01000000,d1
+	bne.s	FNsign_ok	; Bit is already valid
+	bsr	flags_normalize
+FNsign_ok:
+	move.b	flag_byte-flag_storage(a3),d1
+	andi.b	#%01000000,d1
+	rts
+
 	;; Routine to turn 68k flags into z80 flags.
 	;; Preconditions:
 	;;   Flags to change are noted in d0 by a 1 bit
-- 
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