* config/h8300/h8300.c (print_operand): Support 16-bit

	constant addresses.
	* config/h8300/h8300.h (TINY_CONSTANT_ADDRESS_P): New.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@50191 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 46 insertions, 13 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index df3eded181b..d8e0b1f89ad 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2002-03-01  Kazu Hirata  <kazu@hxi.com>
+
+	* config/h8300/h8300.c (print_operand): Support 16-bit
+	constant addresses.
+	* config/h8300/h8300.h (TINY_CONSTANT_ADDRESS_P): New.
+
 2002-02-28  Richard Henderson  <rth@redhat.com>
 
 	* expmed.c (store_bit_field): Prevent generation of CONCATs;
diff --git a/gcc/config/h8300/h8300.c b/gcc/config/h8300/h8300.c
index 7d984544efb..b8e7d98cf0e 100644
--- a/gcc/config/h8300/h8300.c
+++ b/gcc/config/h8300/h8300.c
@@ -1206,23 +1206,42 @@ print_operand (file, x, code)
 	case MEM:
 	  {
 	    rtx addr = XEXP (x, 0);
+	    int eightbit_ok = ((GET_CODE (addr) == SYMBOL_REF
+				&& SYMBOL_REF_FLAG (addr))
+			       || EIGHTBIT_CONSTANT_ADDRESS_P (addr));
+	    int tiny_ok = ((GET_CODE (addr) == SYMBOL_REF
+			    && TINY_DATA_NAME_P (XSTR (addr, 0)))
+			   || TINY_CONSTANT_ADDRESS_P (addr));
 
 	    fprintf (file, "@");
 	    output_address (addr);
 
-	    /* If this is an 'R' operand (reference into the 8-bit
-	       area), then specify a symbolic address as "foo:8",
-	       otherwise if operand is still in eight bit section, use
-	       "foo:16".  */
-	    if (GET_CODE (addr) == SYMBOL_REF
-		&& SYMBOL_REF_FLAG (addr))
-	      fprintf (file, (code == 'R' ? ":8" : ":16"));
-	    else if (GET_CODE (addr) == SYMBOL_REF
-		     && TINY_DATA_NAME_P (XSTR (addr, 0)))
-	      fprintf (file, ":16");
-	    else if ((code == 'R')
-		     && EIGHTBIT_CONSTANT_ADDRESS_P (addr))
-	      fprintf (file, ":8");
+	    /* We fall back from smaller addressing to larger
+	       addressing in various ways depending on CODE.  */
+	    switch (code)
+	      {
+	      case 'R':
+		/* Used for mov.b and bit operations.  */
+		if (eightbit_ok)
+		  {
+		    fprintf (file, ":8");
+		    break;
+		  }
+
+		/* Fall through.  We should not get here if we are
+		   processing bit operations on H8/300 or H8/300H
+		   because 'U' constraint does not allow bit
+		   operations on the tiny area on these machines.  */
+
+	      case 'T':
+	      case 'S':
+		/* Used for mov.w and mov.l.  */
+		if (tiny_ok)
+		  fprintf (file, ":16");
+		break;
+	      default:
+		break;
+	      }
 	  }
 	  break;
 
diff --git a/gcc/config/h8300/h8300.h b/gcc/config/h8300/h8300.h
index cec359cbc7d..6175d310f30 100644
--- a/gcc/config/h8300/h8300.h
+++ b/gcc/config/h8300/h8300.h
@@ -860,6 +860,14 @@ struct cum_arg
   (GET_CODE (X) == CONST_INT && TARGET_H8300H		\
    && 0xffff00 <= INTVAL (X) && INTVAL (X) <= 0xffffff)
 
+/* Nonzero if X is a constant address suitable as an 16-bit absolute
+   on the H8/300H.  */
+
+#define TINY_CONSTANT_ADDRESS_P(X)				\
+  (GET_CODE (X) == CONST_INT && TARGET_H8300H			\
+   && ((0xff8000 <= INTVAL (X) && INTVAL (X) <= 0xffffff)	\
+       || (0x000000 <= INTVAL (X) && INTVAL (X) <= 0x007fff)))
+
 /* 'U' if valid for a bset destination;
    i.e. a register, register indirect, or the eightbit memory region
    (a SYMBOL_REF with an SYMBOL_REF_FLAG set).