fixed SSE compare emit

ir/be/ia32/ia32_emitter.c

@@ -1091,7 +1091,7 @@ static void Set_emitter(ir_node *irn, ir_mode *mode, ia32_emit_env_t *env) {
 		lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "cmp %s", ia32_emit_binop(irn, env));
 	}
 	else if (is_ia32_xCmpSet(irn)) {
-		lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "ucomis%M %s", get_irn_n(irn, 0), ia32_emit_binop(irn, env));
+		lc_esnprintf(arg_env, cmd_buf, SNPRINTF_BUF_LEN, "ucomis%M %s", get_irn_n(irn, 2), ia32_emit_binop(irn, env));
 	}
 	else if (is_ia32_PsiCondSet(irn)) {
 		/* omit compare because flags are already set by And/Or */