fix_truncdfsi2 SUBREG and movdi HOST_BITS_PER_WIDE_INT test

From-SVN: r11274

gcc/config/rs6000/rs6000.md

@@ -3527,14 +3527,13 @@
 {
   if (TARGET_POWER2 || TARGET_POWERPC)
     {
-      int endian = (WORDS_BIG_ENDIAN == 0);
       rtx stack_slot = rs6000_stack_temp (DImode, 8, 1);
       rtx temp = gen_reg_rtx (DImode);
 
       emit_insn (gen_fpcvtsi (temp, operands[1]));
       emit_move_insn (stack_slot, temp);
       emit_move_insn (operands[0],
-		      operand_subword (stack_slot, 1 - endian, 0, DImode));
+		      gen_rtx (SUBREG, SImode, stack_slot, WORDS_BIG_ENDIAN));
       DONE;
     }
   else
@@ -5322,16 +5321,18 @@
 	  low = CONST_DOUBLE_LOW (operands[1]);
 	  high = CONST_DOUBLE_HIGH (operands[1]);
 	}
-      else if (HOST_BITS_PER_WIDE_INT <= 32)
+      else
+#if HOST_BITS_PER_WIDE_INT == 32
 	{
 	  low = INTVAL (operands[1]);
 	  high = (low < 0) ? ~0 : 0;
 	}
-      else
+#else
 	{
           low = INTVAL (operands[1]) & 0xffffffff;
           high = (HOST_WIDE_INT) INTVAL (operands[1]) >> 32;
 	}
+#endif
 
       if (! TARGET_POWERPC64)
 	{
@@ -5479,16 +5480,18 @@
       low = CONST_DOUBLE_LOW (operands[1]);
       high = CONST_DOUBLE_HIGH (operands[1]);
     }
-  else if (HOST_BITS_PER_WIDE_INT <= 32)
+  else
+#if HOST_BITS_PER_WIDE_INT == 32
     {
       low = INTVAL (operands[1]);
       high = (low < 0) ? ~0 : 0;
     }
-  else
+#else
     {
       low = INTVAL (operands[1]) & 0xffffffff;
       high = (HOST_WIDE_INT) INTVAL (operands[1]) >> 32;
     }
+#endif
 
   if ((high + 0x8000) < 0x10000
       && ((low & 0xffff) == 0 || (low & (~ (HOST_WIDE_INT) 0xffff)) == 0))