h8300.c (shift_alg_qi): Use rotations when doing 6-bit logical shifts on H8/S.

	* config/h8300/h8300.c (shift_alg_qi): Use rotations when
	doing 6-bit logical shifts on H8/S.
	(shift_alg_qi): Use special code for 21-bit shifts on H8/S.
	(get_shift_alg): Generate special code for 21-bit shifts on
	H8/S.

From-SVN: r46961

gcc/ChangeLog

 2001-11-12  Kazu Hirata  <kazu@hxi.com>
 
+	* config/h8300/h8300.c (shift_alg_qi): Use rotations when
+	doing 6-bit logical shifts on H8/S.
+	(shift_alg_qi): Use special code for 21-bit shifts on H8/S.
+	(get_shift_alg): Generate special code for 21-bit shifts on
+	H8/S.
+
+2001-11-12  Kazu Hirata  <kazu@hxi.com>
+
 	* config/h8300/h8300.c (get_shift_alg): Remove a redundant
 	label.
 

gcc/config/h8300/h8300.c

@@ -2183,8 +2183,8 @@ static const enum shift_alg shift_alg_qi[3][3][8] = {
   {
     /* TARGET_H8300S  */
     /*  0    1    2    3    4    5    6    7  */
-    { INL, INL, INL, INL, INL, INL, INL, ROT }, /* SHIFT_ASHIFT   */
-    { INL, INL, INL, INL, INL, INL, INL, ROT }, /* SHIFT_LSHIFTRT */
+    { INL, INL, INL, INL, INL, INL, ROT, ROT }, /* SHIFT_ASHIFT   */
+    { INL, INL, INL, INL, INL, INL, ROT, ROT }, /* SHIFT_LSHIFTRT */
     { INL, INL, INL, INL, INL, INL, INL, SPC }  /* SHIFT_ASHIFTRT */
   }
 };
@@ -2272,15 +2272,15 @@ static const enum shift_alg shift_alg_si[3][3][32] = {
     /* 24   25   26   27   28   29   30   31  */
     { INL, INL, INL, INL, INL, INL, INL, INL,
       INL, INL, INL, LOP, LOP, LOP, LOP, LOP,
-      SPC, SPC, SPC, SPC, SPC, LOP, LOP, LOP,
+      SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
       SPC, LOP, LOP, LOP, ROT, ROT, ROT, ROT }, /* SHIFT_ASHIFT   */
     { INL, INL, INL, INL, INL, INL, INL, INL,
       INL, INL, INL, LOP, LOP, LOP, LOP, LOP,
-      SPC, SPC, SPC, SPC, SPC, LOP, LOP, LOP,
+      SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
       SPC, LOP, LOP, LOP, ROT, ROT, ROT, ROT }, /* SHIFT_LSHIFTRT */
     { INL, INL, INL, INL, INL, INL, INL, INL,
       INL, INL, INL, LOP, LOP, LOP, LOP, LOP,
-      SPC, SPC, SPC, SPC, SPC, LOP, LOP, LOP,
+      SPC, SPC, SPC, SPC, SPC, SPC, LOP, LOP,
       SPC, LOP, LOP, LOP, LOP, LOP, LOP, SPC }, /* SHIFT_ASHIFTRT */
   }
 };
@@ -2516,7 +2516,7 @@ get_shift_alg (shift_type, shift_mode, count, info)
 	}
       else if ((TARGET_H8300 && count == 16)
 	       || (TARGET_H8300H && 16 <= count && count <= 19)
-	       || (TARGET_H8300S && 16 <= count && count <= 20))
+	       || (TARGET_H8300S && 16 <= count && count <= 21))
 	{
 	  info->remainder = count - 16;