arm.h (REGISTER_MOVE_COST): Increase VFP register move cost.

	* config/arm/arm.h (REGISTER_MOVE_COST): Increase VFP register
	move cost.

From-SVN: r149057

gcc/ChangeLog

+2009-06-29  Daniel Jacobowitz  <dan@codesourcery.com>
+
+	* config/arm/arm.h (REGISTER_MOVE_COST): Increase VFP register
+	move cost.
+
 2009-06-29  Uros Bizjak  <ubizjak@gmail.com>
 
 	* doc/extend.texi (Additional Floating Types): __float128 is also

gcc/config/arm/arm.h

@@ -1433,13 +1433,17 @@ do {									      \
 /* If defined, gives a class of registers that cannot be used as the
    operand of a SUBREG that changes the mode of the object illegally.  */
 
-/* Moves between FPA_REGS and GENERAL_REGS are two memory insns.  */
+/* Moves between FPA_REGS and GENERAL_REGS are two memory insns.
+   Moves between VFP_REGS and GENERAL_REGS are a single insn, but
+   it is typically more expensive than a single memory access.  We set
+   the cost to less than two memory accesses so that floating
+   point to integer conversion does not go through memory.  */
 #define REGISTER_MOVE_COST(MODE, FROM, TO)		\
   (TARGET_32BIT ?						\
    ((FROM) == FPA_REGS && (TO) != FPA_REGS ? 20 :	\
     (FROM) != FPA_REGS && (TO) == FPA_REGS ? 20 :	\
-    IS_VFP_CLASS (FROM) && !IS_VFP_CLASS (TO) ? 10 :	\
-    !IS_VFP_CLASS (FROM) && IS_VFP_CLASS (TO) ? 10 :	\
+    IS_VFP_CLASS (FROM) && !IS_VFP_CLASS (TO) ? 15 :	\
+    !IS_VFP_CLASS (FROM) && IS_VFP_CLASS (TO) ? 15 :	\
     (FROM) == IWMMXT_REGS && (TO) != IWMMXT_REGS ? 4 :  \
     (FROM) != IWMMXT_REGS && (TO) == IWMMXT_REGS ? 4 :  \
     (FROM) == IWMMXT_GR_REGS || (TO) == IWMMXT_GR_REGS ? 20 :  \