main.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2017 ARM Limited
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 #include <utility>      // std::pair
00017 #include "mbed.h"
00018 #include "greentea-client/test_env.h"
00019 
00020 uint32_t test_64(uint64_t ticks) {
00021     ticks >>= 3; // divide by 8
00022     if (ticks > 0xFFFFFFFF) {
00023         ticks /= 3;
00024     } else {
00025         ticks = (ticks * 0x55555556) >> 32; // divide by 3
00026     }
00027     return (uint32_t)(0xFFFFFFFF & ticks);
00028 }
00029 
00030 const char *result_str(bool result) {
00031     return result ? "[OK]" : "[FAIL]";
00032 }
00033 
00034 int main() {
00035     GREENTEA_SETUP(5, "default_auto");
00036 
00037     bool result = true;
00038 
00039     {   // 0xFFFFFFFF *  8 =  0x7fffffff8
00040         std::pair<uint32_t, uint64_t> values = std::make_pair(0x55555555, 0x7FFFFFFF8);
00041         uint32_t test_ret = test_64(values.second);
00042         bool test_res = values.first == test_ret;
00043         result = result && test_res;
00044         printf("64bit: 0x7FFFFFFF8: expected 0x%lX got 0x%lX ... %s\r\n", values.first, test_ret, result_str(test_res));
00045     }
00046 
00047     {   // 0xFFFFFFFF * 24 = 0x17ffffffe8
00048         std::pair<uint32_t, uint64_t> values = std::make_pair(0xFFFFFFFF, 0x17FFFFFFE8);
00049         uint32_t test_ret = test_64(values.second);
00050         bool test_res = values.first == test_ret;
00051         result = result && test_res;
00052         printf("64bit: 0x17FFFFFFE8: expected 0x%lX got 0x%lX ... %s\r\n", values.first, test_ret, result_str(test_res));
00053     }
00054 
00055     GREENTEA_TESTSUITE_RESULT(result);
00056 }