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Merge pull request #4311 from kaspar030/remove_div_u32_by_10

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sys: div: remove div_u32_by_10() (and _mod_10())
This commit is contained in:
Kaspar Schleiser 2015-11-19 15:35:29 +01:00
commit 127495b1b2
2 changed files with 0 additions and 50 deletions
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28
sys/include/div.h
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@ -77,34 +77,6 @@ static inline uint32_t div_u32_by_15625div512(uint32_t val)
return ((uint64_t)(val) * 0x431bde83ul) >> (12 + 32 - 9);
}
/**
* @brief Integer divide val by 10
*
* @param[in] n dividend
* @return (n / 10)
*/
static inline uint32_t div_u32_by_10(uint32_t n) {
uint32_t q, r;
q = (n >> 1) + (n >> 2);
q = q + (q >> 4);
q = q + (q >> 8);
q = q + (q >> 16);
q = q >> 3;
r = n - (((q << 2) + q) << 1);
return q + (r > 9);
}
/**
* @brief Modulo 10
*
* @param[in] n dividend
* @return (n % 10)
*/
static inline uint32_t div_u32_mod_10(uint32_t n)
{
return n - (div_u32_by_10(n)*10);
}
#ifdef __cplusplus
}
#endif

22
tests/unittests/tests-div/tests-div.c
View File

@ -79,34 +79,12 @@ static void test_div_u64_by_1000000(void)
}
}
static void test_div_u32_by_10(void)
{
for (unsigned i = 0; i < N_U32_VALS; i++) {
DEBUG("Dividing %"PRIu32" by 10...\n", u32_test_values[i]);
TEST_ASSERT_EQUAL_INT(
div_u32_by_10(u32_test_values[i]),
u32_test_values[i]/10);
}
}
static void test_div_u32_mod_10(void)
{
for (unsigned i = 0; i < N_U32_VALS; i++) {
DEBUG("Calculating %"PRIu32" % 10...\n", u32_test_values[i]);
TEST_ASSERT_EQUAL_INT(
div_u32_mod_10(u32_test_values[i]),
u32_test_values[i]%10);
}
}
Test *tests_div_tests(void)
{
EMB_UNIT_TESTFIXTURES(fixtures) {
new_TestFixture(test_div_u64_by_15625),
new_TestFixture(test_div_u32_by_15625div512),
new_TestFixture(test_div_u64_by_1000000),
new_TestFixture(test_div_u32_by_10),
new_TestFixture(test_div_u32_mod_10),
};
EMB_UNIT_TESTCALLER(div_tests, NULL, NULL, fixtures);