Do not move float values through memory to get to/from gp registers if -msoft-float.

From-SVN: r9242

gcc/config/rs6000/rs6000.md

@@ -3901,11 +3901,11 @@
   [(set_attr "type" "*,*,*,compare,*,*,load,*")
    (set_attr "length" "*,*,12,*,8,*,*,*")])
 
-;; For floating-point, we normally deal with the floating-point registers.
-;; The sole exception is that parameter passing can produce floating-point
-;; values in fixed-point registers.  Unless the value is a simple constant
-;; or already in memory, we deal with this by allocating memory and copying
-;; the value explicitly via that memory location.
+;; For floating-point, we normally deal with the floating-point registers
+;; unless -msoft-float is used.  The sole exception is that parameter passing
+;; can produce floating-point values in fixed-point registers.  Unless the
+;; value is a simple constant or already in memory, we deal with this by
+;; allocating memory and copying the value explicitly via that memory location.
 (define_expand "movsf"
   [(set (match_operand:SF 0 "nonimmediate_operand" "")
 	(match_operand:SF 1 "any_operand" ""))]
@@ -3923,6 +3923,8 @@
       && REGNO (SUBREG_REG (operands[1])) < FIRST_PSEUDO_REGISTER)
     operands[1] = alter_subreg (operands[1]);
 
+  if (TARGET_HARD_FLOAT)
+    {
       if (GET_CODE (operands[1]) == REG && REGNO (operands[1]) < 32)
 	{
 	  /* If this is a store to memory or another integer register do the
@@ -3989,6 +3991,7 @@
 	      DONE;
 	    }
 	}
+    }
 
   if (CONSTANT_P (operands[1]))
     {