restore regwptr (Blue Swirl)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1576 c046a42c-6fe2-441c-8c8c-71466251a162

target-sparc/exec.h

@@ -152,6 +152,10 @@ void do_rdpsr();
 
 static inline void env_to_regs(void)
 {
+#if defined(reg_REGWPTR)
+    REGWPTR = env->regbase + (env->cwp * 16);
+    env->regwptr = REGWPTR;
+#endif
 }
 
 static inline void regs_to_env(void)