crisv10: Always clear the V and C flags on btst.

Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@gmail.com>

target-cris/op_helper.c

@@ -276,6 +276,8 @@ uint32_t helper_btst(uint32_t t0, uint32_t t1, uint32_t ccs)
 
 	/* Clear the X, N and Z flags.  */
 	ccs = ccs & ~(X_FLAG | N_FLAG | Z_FLAG);
+	if (env->pregs[PR_VR] < 32)
+		ccs &= ~(V_FLAG | C_FLAG);
 	/* Set the N and Z flags accordingly.  */
 	ccs |= (bset << 3) | (fz << 2);
 	return ccs;