target/openrisc: Set PC to cpu state on FPU exception

Store the PC to ensure the correct value can be read in the exception
handler.

Signed-off-by: Stafford Horne <shorne@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

target/openrisc/fpu_helper.c

@@ -20,8 +20,8 @@
 
 #include "qemu/osdep.h"
 #include "cpu.h"
+#include "exec/exec-all.h"
 #include "exec/helper-proto.h"
-#include "exception.h"
 #include "fpu/softfloat.h"
 
 static int ieee_ex_to_openrisc(int fexcp)
@@ -45,6 +45,15 @@ static int ieee_ex_to_openrisc(int fexcp)
     return ret;
 }
 
+static G_NORETURN
+void do_fpe(CPUOpenRISCState *env, uintptr_t pc)
+{
+    CPUState *cs = env_cpu(env);
+
+    cs->exception_index = EXCP_FPE;
+    cpu_loop_exit_restore(cs, pc);
+}
+
 void HELPER(update_fpcsr)(CPUOpenRISCState *env)
 {
     int tmp = get_float_exception_flags(&env->fp_status);
@@ -55,7 +64,7 @@ void HELPER(update_fpcsr)(CPUOpenRISCState *env)
         if (tmp) {
             env->fpcsr |= tmp;
             if (env->fpcsr & FPCSR_FPEE) {
-                helper_exception(env, EXCP_FPE);
+                do_fpe(env, GETPC());
             }
         }
     }