(float{,uns}sidf2): Call rs6000_float_const to portably build the proper…

(float{,uns}sidf2): Call rs6000_float_const to portably build the proper floating point constant for conversions.

(float{,uns}sidf2): Call rs6000_float_const to portably build the proper
floating point constant for conversions.
(movdi): Properly handle movdi of CONST_{INT,DOUBLE} on little endian systems.

From-SVN: r10318

gcc/config/rs6000/rs6000.md

@@ -3338,9 +3338,7 @@
   operands[2] = gen_reg_rtx (DImode);
   operands[3] = gen_rtx (CONST_INT, VOIDmode, 0x80000000);
   operands[4] = rs6000_immed_double_const (0, 0x43300000, DImode);
-  operands[5] = force_reg (DFmode, rs6000_immed_double_const (0x43300000,
-							      0x80000000,
-							      DFmode));
+  operands[5] = force_reg (DFmode, rs6000_float_const (\"4503601774854144\", DFmode));
 }")
 
 (define_expand "floatunssidf2"
@@ -3355,7 +3353,7 @@
 {
   operands[2] = gen_reg_rtx (DImode);
   operands[3] = rs6000_immed_double_const (0, 0x43300000, DImode);
-  operands[4] = force_reg (DFmode, rs6000_immed_double_const (0x43300000, 0, DFmode));
+  operands[4] = force_reg (DFmode, rs6000_float_const (\"4503599627370496\", DFmode));
 }")
 
 ;; For the above two cases, we always split.
@@ -4393,19 +4391,34 @@
   ""
   "
 {
+  if (GET_CODE (operands[0]) == MEM)
+    operands[1] = force_reg (DImode, operands[1]);
+
   if (GET_CODE (operands[1]) == CONST_DOUBLE
       || GET_CODE (operands[1]) == CONST_INT)
     {
-      emit_move_insn (operand_subword (operands[0], 0, 0, DImode),
-		      operand_subword (operands[1], 0, 0, DImode));
-      emit_move_insn (operand_subword (operands[0], 1, 0, DImode),
-		      operand_subword (operands[1], 1, 0, DImode));
+      HOST_WIDE_INT low;
+      HOST_WIDE_INT high;
+
+      if (GET_CODE (operands[1]) == CONST_DOUBLE)
+	{
+	  low = CONST_DOUBLE_LOW (operands[1]);
+	  high = CONST_DOUBLE_HIGH (operands[1]);
+	}
+      else
+	{
+	  low = INTVAL (operands[1]);
+	  high = (low < 0) ? ~0 : 0;
+	}
+
+      emit_move_insn (gen_rtx (SUBREG, SImode, operands[0], WORDS_BIG_ENDIAN),
+		      GEN_INT (low));
+
+      emit_move_insn (gen_rtx (SUBREG, SImode, operands[0], !WORDS_BIG_ENDIAN),
+		      GEN_INT (high));
       DONE;
     }
 
-  if (GET_CODE (operands[0]) == MEM)
-    operands[1] = force_reg (DImode, operands[1]);
-
       /* Stores between FPR and any non-FPR registers must go through a
          temporary stack slot.  */