Re: Another minor arm assembler bug

[Nick Clifton]

Hi Frank,

: [I apologize if this is a duplicate.  I'm not sure if my original message
: went out or not.]

It did.  I now have a patch to implement this (see below), but since I
am away from my main machine I have not yet checked it into the source 
repository.

Cheers
        Nick

2001-06-26  Nick Clifton  <address@hidden>

        * config/tc-arm.c (do_ldst): Use MVN to build simple negative
        constants.

*** tc-arm.c.orig       Tue Jun 26 11:35:43 2001
--- tc-arm.c    Tue Jun 26 11:35:46 2001
*************** do_ldst (str, flags)
*** 4611,4616 ****
--- 4611,4626 ----
          end_of_line (str);
          return;
        }
+       else if (inst.reloc.exp.X_op == O_constant
+         && (value = validate_immediate (- inst.reloc.exp.X_add_number)) != 
FAIL)
+       {
+         /* This can be done with a mvn instruction.  */
+         inst.instruction &= LITERAL_MASK;
+         inst.instruction |= INST_IMMEDIATE | (OPCODE_MVN << DATA_OP_SHIFT);
+         inst.instruction |= (flags & COND_MASK) | (value & 0xfff);
+         end_of_line (str);
+         return;
+       }
        else
        {
          /* Insert into literal pool.  */