Greg Steiert / maxim_dev

Dependents:   sensomed

TESTS/mbedmicro-mbed/div/main.cpp@0:0e018d759a2a, 2016-11-08 (annotated)

Committer:
switches
Date:
Tue Nov 08 18:27:11 2016 +0000
Revision:
0:0e018d759a2a
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
switches 0:0e018d759a2a 1 #include <utility> // std::pair
switches 0:0e018d759a2a 2 #include "mbed.h"
switches 0:0e018d759a2a 3 #include "greentea-client/test_env.h"
switches 0:0e018d759a2a 4
switches 0:0e018d759a2a 5 uint32_t test_64(uint64_t ticks) {
switches 0:0e018d759a2a 6 ticks >>= 3; // divide by 8
switches 0:0e018d759a2a 7 if (ticks > 0xFFFFFFFF) {
switches 0:0e018d759a2a 8 ticks /= 3;
switches 0:0e018d759a2a 9 } else {
switches 0:0e018d759a2a 10 ticks = (ticks * 0x55555556) >> 32; // divide by 3
switches 0:0e018d759a2a 11 }
switches 0:0e018d759a2a 12 return (uint32_t)(0xFFFFFFFF & ticks);
switches 0:0e018d759a2a 13 }
switches 0:0e018d759a2a 14
switches 0:0e018d759a2a 15 const char *result_str(bool result) {
switches 0:0e018d759a2a 16 return result ? "[OK]" : "[FAIL]";
switches 0:0e018d759a2a 17 }
switches 0:0e018d759a2a 18
switches 0:0e018d759a2a 19 int main() {
switches 0:0e018d759a2a 20 GREENTEA_SETUP(5, "default_auto");
switches 0:0e018d759a2a 21
switches 0:0e018d759a2a 22 bool result = true;
switches 0:0e018d759a2a 23
switches 0:0e018d759a2a 24 { // 0xFFFFFFFF * 8 = 0x7fffffff8
switches 0:0e018d759a2a 25 std::pair<uint32_t, uint64_t> values = std::make_pair(0x55555555, 0x7FFFFFFF8);
switches 0:0e018d759a2a 26 uint32_t test_ret = test_64(values.second);
switches 0:0e018d759a2a 27 bool test_res = values.first == test_ret;
switches 0:0e018d759a2a 28 result = result && test_res;
switches 0:0e018d759a2a 29 printf("64bit: 0x7FFFFFFF8: expected 0x%lX got 0x%lX ... %s\r\n", values.first, test_ret, result_str(test_res));
switches 0:0e018d759a2a 30 }
switches 0:0e018d759a2a 31
switches 0:0e018d759a2a 32 { // 0xFFFFFFFF * 24 = 0x17ffffffe8
switches 0:0e018d759a2a 33 std::pair<uint32_t, uint64_t> values = std::make_pair(0xFFFFFFFF, 0x17FFFFFFE8);
switches 0:0e018d759a2a 34 uint32_t test_ret = test_64(values.second);
switches 0:0e018d759a2a 35 bool test_res = values.first == test_ret;
switches 0:0e018d759a2a 36 result = result && test_res;
switches 0:0e018d759a2a 37 printf("64bit: 0x17FFFFFFE8: expected 0x%lX got 0x%lX ... %s\r\n", values.first, test_ret, result_str(test_res));
switches 0:0e018d759a2a 38 }
switches 0:0e018d759a2a 39
switches 0:0e018d759a2a 40 GREENTEA_TESTSUITE_RESULT(result);
switches 0:0e018d759a2a 41 }