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add unit test for full multiplication

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This commit is contained in:
Joao Paulo Magalhaes 2020-11-16 11:59:18 +00:00
parent bb03cb615c
commit 7da4b05645
1 changed files with 25 additions and 0 deletions
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25
tests/basictest.cpp
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@ -344,8 +344,33 @@ bool test_fixed_only() {
Assert(fast_float::leading_zeroes(bit << 63) == 0);
}
void test_full_multiplication(uint64_t lhs, uint64_t rhs, uint64_t expected_lo, uint64_t expected_hi)
{
fast_float::value128 v;
v = fast_float::full_multiplication(lhs, rhs);
Assert(v.low == expected_lo);
Assert(v.high == expected_hi);
v = fast_float::full_multiplication(rhs, lhs);
Assert(v.low == expected_lo);
Assert(v.high == expected_hi);
}
void test_full_multiplication()
{
constexpr const uint64_t bit = 1;
// lhs rhs lo hi
test_full_multiplication(bit << 0 , bit << 0, 1u , 0u);
test_full_multiplication(bit << 0 , bit << 63, bit << 63, 0u);
test_full_multiplication(bit << 1 , bit << 63, 0u , 1u);
test_full_multiplication(bit << 63, bit << 0, bit << 63, 0u);
test_full_multiplication(bit << 63, bit << 1, 0u , 1u);
test_full_multiplication(bit << 63, bit << 2, 0u , 2u);
test_full_multiplication(bit << 63, bit << 63, 0u , bit << 62);
}
int main() {
test_leading_zeroes();
test_full_multiplication();
Assert(test_fixed_only());
Assert(test_scientific_only());
Assert(issue8());