mbed-os
Fork of mbed-os by
features/unsupported/tests/mbed/div/main.cpp
- Committer:
- xuaner
- Date:
- 2017-07-20
- Revision:
- 1:3deb71413561
- Parent:
- 0:f269e3021894
File content as of revision 1:3deb71413561:
#include <utility> // std::pair #include "mbed.h" #include "test_env.h" uint32_t test_64(uint64_t ticks) { ticks >>= 3; // divide by 8 if (ticks > 0xFFFFFFFF) { ticks /= 3; } else { ticks = (ticks * 0x55555556) >> 32; // divide by 3 } return (uint32_t)(0xFFFFFFFF & ticks); } const char *result_str(bool result) { return result ? "[OK]" : "[FAIL]"; } int main() { MBED_HOSTTEST_TIMEOUT(20); MBED_HOSTTEST_SELECT(default_auto); MBED_HOSTTEST_DESCRIPTION(Integer constant division); MBED_HOSTTEST_START("MBED_26"); bool result = true; { // 0xFFFFFFFF * 8 = 0x7fffffff8 std::pair<uint32_t, uint64_t> values = std::make_pair(0x55555555, 0x7FFFFFFF8); uint32_t test_ret = test_64(values.second); bool test_res = values.first == test_ret; result = result && test_res; printf("64bit: 0x7FFFFFFF8: expected 0x%lX got 0x%lX ... %s\r\n", values.first, test_ret, result_str(test_res)); } { // 0xFFFFFFFF * 24 = 0x17ffffffe8 std::pair<uint32_t, uint64_t> values = std::make_pair(0xFFFFFFFF, 0x17FFFFFFE8); uint32_t test_ret = test_64(values.second); bool test_res = values.first == test_ret; result = result && test_res; printf("64bit: 0x17FFFFFFE8: expected 0x%lX got 0x%lX ... %s\r\n", values.first, test_ret, result_str(test_res)); } MBED_HOSTTEST_RESULT(result); }