2000-12-03 Kazu Hirata <kazu@hxi.com>

[deliverable/binutils-gdb.git] / gas / config / tc-m68hc11.c

diff --git a/gas/config/tc-m68hc11.c b/gas/config/tc-m68hc11.c
index eabf8efcac5f475484504f193ddc1b7fe9f32873..81311084c4717cb694ca3f3392edc480c255a4a9 100644 (file)
--- a/gas/config/tc-m68hc11.c
+++ b/gas/config/tc-m68hc11.c
@@ -1073,6 +1073,8 @@ get_operand (oper, which, opmode)
 
       if (*p == ',')
        {
+          int possible_mode = M6811_OP_NONE;
+          char *old_input_line;
          p++;
 
          /* 68HC12 pre increment or decrement.  */
@@ -1080,23 +1082,37 @@ get_operand (oper, which, opmode)
            {
              if (*p == '-')
                {
-                 mode = M6812_PRE_DEC;
+                 possible_mode = M6812_PRE_DEC;
                  p++;
-                 if (current_architecture & cpu6811)
-                   as_bad (_("Pre-decrement mode is not valid for 68HC11"));
                }
              else if (*p == '+')
                {
-                 mode = M6812_PRE_INC;
+                 possible_mode = M6812_PRE_INC;
                  p++;
-                 if (current_architecture & cpu6811)
-                   as_bad (_("Pre-increment mode is not valid for 68HC11"));
                }
              p = skip_whites (p);
            }
+          old_input_line = input_line_pointer;
          input_line_pointer = p;
          reg = register_name ();
 
+          /* Backtrack if we have a valid constant expression and
+             it does not correspond to the offset of the 68HC12 indexed
+             addressing mode (as in N,x).  */
+          if (reg == REG_NONE && mode == M6811_OP_NONE
+              && possible_mode != M6811_OP_NONE)
+            {
+              oper->mode = M6811_OP_IND16 | M6811_OP_JUMP_REL;
+              input_line_pointer = skip_whites (old_input_line);
+              return 1;
+            }
+
+          if (possible_mode != M6811_OP_NONE)
+            mode = possible_mode;
+
+          if ((current_architecture & cpu6811)
+              && possible_mode != M6811_OP_NONE)
+            as_bad (_("Pre-increment mode is not valid for 68HC11"));
          /* Backtrack.  */
          if (which == 0 && opmode & M6812_OP_IDX_P2
              && reg != REG_X && reg != REG_Y
@@ -1700,7 +1716,8 @@ build_indexed_byte (op, format, move_insn)
 
          if (move_insn && !(val >= -16 && val <= 15))
            {
-             as_bad (_("Offset out of 5-bit range for movw/movb insn."));
+             as_bad (_("Offset out of 5-bit range for movw/movb insn: %ld."),
+                      val);
              return -1;
            }