PR991

* config/tc-m68k.c (m68k_ip): Test for insn compatiblity using a temporary copy
  of the operands array so that changes can be safely backed out if the insn
  does not match.
  (m68k_compare_opcode): Shortcut the test when the parameters are the same.
  Return 1 if the names match but the second opcode is further on in the array
  than the first.

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 9bb49fe..5ea1397 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,13 @@
+2005-06-08  Tomas Hurka  <tom@hukatronic.cz>
+
+       PR991
+       * config/tc-m68k.c (m68k_ip): Test for insn compatiblity using a
+       temporary copy of the operands array so that changes can be safely
+       backed out if the insn does not match.
+       (m68k_compare_opcode): Shortcut the test when the parameters are
+       the same.  Return 1 if the names match but the second opcode is
+       further on in the array than the first.
+
 2005-06-08  Nick Clifton  <nickc@redhat.com>
 
        PR 994

diff --git a/gas/config/tc-m68k.c b/gas/config/tc-m68k.c
index eb6e469..07b06e7 100644 (file)
--- a/gas/config/tc-m68k.c
+++ b/gas/config/tc-m68k.c
@@ -1089,6 +1089,7 @@ m68k_ip (char *instring)
   char c;
   int losing;
   int opsfound;
+  struct m68k_op operands_backup[6];
   LITTLENUM_TYPE words[6];
   LITTLENUM_TYPE *wordp;
   unsigned long ok_arch = 0;
@@ -1213,7 +1214,15 @@ m68k_ip (char *instring)
        ++losing;
       else
        {
-         for (s = opcode->m_operands, opP = &the_ins.operands[0];
+         int i;
+
+         /* Make a copy of the operands of this insn so that
+            we can modify them safely, should we want to.  */
+         assert (opsfound <= (int) ARRAY_SIZE (operands_backup));
+         for (i = 0; i < opsfound; i++)
+           operands_backup[i] = the_ins.operands[i];
+
+         for (s = opcode->m_operands, opP = &operands_backup[0];
               *s && !losing;
               s += 2, opP++)
            {
@@ -1974,6 +1983,12 @@ m68k_ip (char *instring)
              if (losing)
                break;
            }
+
+         /* Since we have found the correct instruction, copy
+            in the modifications that we may have made.  */
+         if (!losing)
+           for (i = 0; i < opsfound; i++)
+             the_ins.operands[i] = operands_backup[i];
        }
 
       if (!losing)
@@ -4116,6 +4131,9 @@ m68k_compare_opcode (const void * v1, const void * v2)
   struct m68k_opcode * op1, * op2;
   int ret;
 
+  if (v1 == v2)
+    return 0;
+
   op1 = *(struct m68k_opcode **) v1;
   op2 = *(struct m68k_opcode **) v2;
 
@@ -4126,7 +4144,7 @@ m68k_compare_opcode (const void * v1, const void * v2)
     return ret;
   if (op1 < op2)
     return -1;
-  return 0;
+  return 1;
 }
 
 void