In arm.md, enable expansion for neg[sd]f for Maverick - the instructions are
already already defined in cirrus.md

Without this patch for some reason it still manages to produce cfnegd
instructions but not cfnegs, presumably via some optimization path.

    Martin Guy <martinwguy@yahoo.it> December 2008

Index: gcc-4.2.4/gcc/config/arm/arm.md
===================================================================
--- gcc-4.2.4.orig/gcc/config/arm/arm.md	2009-08-09 15:43:45.000000000 +0100
+++ gcc-4.2.4/gcc/config/arm/arm.md	2009-08-09 15:45:15.000000000 +0100
@@ -3046,14 +3046,18 @@
 (define_expand "negsf2"
   [(set (match_operand:SF         0 "s_register_operand" "")
 	(neg:SF (match_operand:SF 1 "s_register_operand" "")))]
-  "TARGET_ARM && TARGET_HARD_FLOAT && (TARGET_FPA || TARGET_VFP)"
+  "TARGET_ARM && TARGET_HARD_FLOAT
+   && (TARGET_FPA || TARGET_VFP
+       || (TARGET_MAVERICK && ! HONOR_SIGNED_ZEROS(SFmode))"
   ""
 )
 
 (define_expand "negdf2"
   [(set (match_operand:DF         0 "s_register_operand" "")
 	(neg:DF (match_operand:DF 1 "s_register_operand" "")))]
-  "TARGET_ARM && TARGET_HARD_FLOAT && (TARGET_FPA || TARGET_VFP)"
+  "TARGET_ARM && TARGET_HARD_FLOAT
+   && (TARGET_FPA || TARGET_VFP
+       || (TARGET_MAVERICK && ! HONOR_SIGNED_ZEROS(DFmode))"
   "")
 
 ;; abssi2 doesn't really clobber the condition codes if a different register