2006-07-18 Paul Brook <paul@codesourcery.com>

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

diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index 1bfe5b307a3d5f67f1bc939646a3847685936d8a..fe9d77521fc733e2893642204752c69a1cf216b7 100644 (file)
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -8186,13 +8186,13 @@ do_t_add_sub (void)
        narrow = (current_it_mask != 0);
       if (!inst.operands[2].isreg)
        {
+         int add;
+
+         add = (inst.instruction == T_MNEM_add
+                || inst.instruction == T_MNEM_adds);
          opcode = 0;
          if (inst.size_req != 4)
            {
-             int add;
-
-             add = (inst.instruction == T_MNEM_add
-                    || inst.instruction == T_MNEM_adds);
              /* Attempt to use a narrow opcode, with relaxation if
                 appropriate.  */
              if (Rd == REG_SP && Rs == REG_SP && !flags)
@@ -8222,12 +8222,24 @@ do_t_add_sub (void)
          if (inst.size_req == 4
              || (inst.size_req != 2 && !opcode))
            {
-             /* ??? Convert large immediates to addw/subw.  */
-             inst.instruction = THUMB_OP32 (inst.instruction);
-             inst.instruction = (inst.instruction & 0xe1ffffff) | 0x10000000;
+             if (Rs == REG_PC)
+               {
+                 /* Always use addw/subw.  */
+                 inst.instruction = add ? 0xf20f0000 : 0xf2af0000;
+                 inst.reloc.type = BFD_RELOC_ARM_T32_IMM12;
+               }
+             else
+               {
+                 inst.instruction = THUMB_OP32 (inst.instruction);
+                 inst.instruction = (inst.instruction & 0xe1ffffff)
+                                    | 0x10000000;
+                 if (flags)
+                   inst.reloc.type = BFD_RELOC_ARM_T32_IMMEDIATE;
+                 else
+                   inst.reloc.type = BFD_RELOC_ARM_T32_ADD_IMM;
+               }
              inst.instruction |= inst.operands[0].reg << 8;
              inst.instruction |= inst.operands[1].reg << 16;
-             inst.reloc.type = BFD_RELOC_ARM_T32_IMMEDIATE;
            }
        }
       else
@@ -16136,7 +16148,10 @@ md_convert_frag (bfd *abfd, segT asec ATTRIBUTE_UNUSED, fragS *fragp)
          insn = THUMB_OP32 (opcode);
          insn |= (old_op & 0xf0) << 4;
          put_thumb32_insn (buf, insn);
-         reloc_type = BFD_RELOC_ARM_T32_IMMEDIATE;
+         if (opcode == T_MNEM_add_pc)
+           reloc_type = BFD_RELOC_ARM_T32_IMM12;
+         else
+           reloc_type = BFD_RELOC_ARM_T32_ADD_IMM;
        }
       else
        reloc_type = BFD_RELOC_ARM_THUMB_ADD;
@@ -16153,7 +16168,10 @@ md_convert_frag (bfd *abfd, segT asec ATTRIBUTE_UNUSED, fragS *fragp)
          insn |= (old_op & 0xf0) << 4;
          insn |= (old_op & 0xf) << 16;
          put_thumb32_insn (buf, insn);
-         reloc_type = BFD_RELOC_ARM_T32_IMMEDIATE;
+         if (insn & (1 << 20))
+           reloc_type = BFD_RELOC_ARM_T32_ADD_IMM;
+         else
+           reloc_type = BFD_RELOC_ARM_T32_IMMEDIATE;
        }
       else
        reloc_type = BFD_RELOC_ARM_THUMB_ADD;
@@ -17561,6 +17579,7 @@ md_apply_fix (fixS *    fixP,
       break;
 
     case BFD_RELOC_ARM_T32_IMMEDIATE:
+    case BFD_RELOC_ARM_T32_ADD_IMM:
     case BFD_RELOC_ARM_T32_IMM12:
     case BFD_RELOC_ARM_T32_ADD_PC12:
       /* We claim that this fixup has been processed here,
@@ -17581,15 +17600,21 @@ md_apply_fix (fixS *  fixP,
       newval <<= 16;
       newval |= md_chars_to_number (buf+2, THUMB_SIZE);
 
-      /* FUTURE: Implement analogue of negate_data_op for T32.  */
-      if (fixP->fx_r_type == BFD_RELOC_ARM_T32_IMMEDIATE)
+      newimm = FAIL;
+      if (fixP->fx_r_type == BFD_RELOC_ARM_T32_IMMEDIATE
+         || fixP->fx_r_type == BFD_RELOC_ARM_T32_ADD_IMM)
        {
          newimm = encode_thumb32_immediate (value);
          if (newimm == (unsigned int) FAIL)
            newimm = thumb32_negate_data_op (&newval, value);
        }
-      else
+      if (fixP->fx_r_type != BFD_RELOC_ARM_T32_IMMEDIATE
+         && newimm == (unsigned int) FAIL)
        {
+         /* Turn add/sum into addw/subw.  */
+         if (fixP->fx_r_type == BFD_RELOC_ARM_T32_ADD_IMM)
+           newval = (newval & 0xfeffffff) | 0x02000000;
+
          /* 12 bit immediate for addw/subw.  */
          if (value < 0)
            {
@@ -18608,6 +18633,7 @@ arm_force_relocation (struct fix * fixp)
   if (fixp->fx_r_type == BFD_RELOC_ARM_IMMEDIATE
       || fixp->fx_r_type == BFD_RELOC_ARM_OFFSET_IMM
       || fixp->fx_r_type == BFD_RELOC_ARM_ADRL_IMMEDIATE
+      || fixp->fx_r_type == BFD_RELOC_ARM_T32_ADD_IMM
       || fixp->fx_r_type == BFD_RELOC_ARM_T32_IMMEDIATE
       || fixp->fx_r_type == BFD_RELOC_ARM_T32_IMM12
       || fixp->fx_r_type == BFD_RELOC_ARM_T32_ADD_PC12)