mirror of https://github.com/ARMmbed/mbed-os.git
57 lines
1.9 KiB
C++
57 lines
1.9 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2017 ARM Limited
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <utility> // std::pair
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#include "mbed.h"
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#include "greentea-client/test_env.h"
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uint32_t test_64(uint64_t ticks) {
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ticks >>= 3; // divide by 8
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if (ticks > 0xFFFFFFFF) {
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ticks /= 3;
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} else {
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ticks = (ticks * 0x55555556) >> 32; // divide by 3
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}
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return (uint32_t)(0xFFFFFFFF & ticks);
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}
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const char *result_str(bool result) {
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return result ? "[OK]" : "[FAIL]";
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}
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int main() {
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GREENTEA_SETUP(5, "default_auto");
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bool result = true;
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{ // 0xFFFFFFFF * 8 = 0x7fffffff8
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std::pair<uint32_t, uint64_t> values = std::make_pair(0x55555555, 0x7FFFFFFF8);
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uint32_t test_ret = test_64(values.second);
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bool test_res = values.first == test_ret;
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result = result && test_res;
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printf("64bit: 0x7FFFFFFF8: expected 0x%lX got 0x%lX ... %s\r\n", values.first, test_ret, result_str(test_res));
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}
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{ // 0xFFFFFFFF * 24 = 0x17ffffffe8
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std::pair<uint32_t, uint64_t> values = std::make_pair(0xFFFFFFFF, 0x17FFFFFFE8);
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uint32_t test_ret = test_64(values.second);
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bool test_res = values.first == test_ret;
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result = result && test_res;
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printf("64bit: 0x17FFFFFFE8: expected 0x%lX got 0x%lX ... %s\r\n", values.first, test_ret, result_str(test_res));
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}
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GREENTEA_TESTSUITE_RESULT(result);
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}
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