Fix: cmp.l A,A is not the same as tst.l A

diff --git a/mach/m68020/top/table b/mach/m68020/top/table
index 4bfce51..961c4b1 100644 (file)
--- a/mach/m68020/top/table
+++ b/mach/m68020/top/table
@@ -79,11 +79,16 @@ move.w DREG,DREG2 : NO32 A,DREG2 : move.w DREG2,DREG
 move.l DREG,DREG2 : ANY A,DREG2 : move.l DREG2,DREG
                {no_part(DREG2,A)}      ->      ANY A,DREG : move.l DREG,DREG2 ;
 
-/* change some compares to tests */
-cmp.w A,A                              ->      tst.w A ;
-cmp.l A,A                              ->      tst.l A ;
-cmp.b A,A                              ->      tst.b A ;
+cmp.b A,A : beq LAB                    ->      bra LAB ;
+cmp.w A,A : beq LAB                    ->      bra LAB ;
+cmp.l A,A : beq LAB                    ->      bra LAB ;
+
+/* cannot delete cmp's because they affect condition codes (obvious, but ... )*/
+cmp.b A,A : bne LAB                    ->      cmp.b A,A ;
+cmp.w A,A : bne LAB                    ->      cmp.w A,A ;
+cmp.l A,A : bne LAB                    ->      cmp.l A,A ;
 
+/* change some compares to tests */
 cmp.w #0,D : beq LAB                   ->      tst.w D : beq LAB ;
 cmp.w #0,D : bne LAB                   ->      tst.w D : bne LAB ;
 cmp.w #0,D : blt LAB                   ->      tst.w D : blt LAB ;