1 #include <gtest/gtest.h>
2
3 #include <fxdiv.h>
4
TEST(uint32_t,cases)5 TEST(uint32_t, cases) {
6 EXPECT_EQ(UINT32_C(0), fxdiv_mulhi_uint32_t(UINT32_C(0), UINT32_C(0)));
7 EXPECT_EQ(UINT32_C(0), fxdiv_mulhi_uint32_t(UINT32_C(1), UINT32_C(1)));
8 EXPECT_EQ(UINT32_C(0), fxdiv_mulhi_uint32_t(UINT32_C(1), UINT32_MAX));
9 EXPECT_EQ(UINT32_C(0), fxdiv_mulhi_uint32_t(UINT32_MAX, UINT32_C(1)));
10 EXPECT_EQ(UINT32_C(1), fxdiv_mulhi_uint32_t(UINT32_C(65536), UINT32_C(65536)));
11 EXPECT_EQ(UINT32_MAX - UINT32_C(1), fxdiv_mulhi_uint32_t(UINT32_MAX, UINT32_MAX));
12 EXPECT_EQ(UINT32_C(28389652), fxdiv_mulhi_uint32_t(UINT32_C(123456789), UINT32_C(987654321)));
13 EXPECT_EQ(UINT32_C(28389652), fxdiv_mulhi_uint32_t(UINT32_C(987654321), UINT32_C(123456789)));
14 }
15
TEST(uint64_t,cases)16 TEST(uint64_t, cases) {
17 EXPECT_EQ(UINT64_C(0), fxdiv_mulhi_uint64_t(UINT64_C(0), UINT64_C(0)));
18 EXPECT_EQ(UINT64_C(0), fxdiv_mulhi_uint64_t(UINT64_C(1), UINT64_C(1)));
19 EXPECT_EQ(UINT64_C(0), fxdiv_mulhi_uint64_t(UINT64_C(1), UINT64_MAX));
20 EXPECT_EQ(UINT64_C(0), fxdiv_mulhi_uint64_t(UINT64_MAX, UINT64_C(1)));
21 EXPECT_EQ(UINT64_C(1), fxdiv_mulhi_uint64_t(UINT64_C(4294967296), UINT64_C(4294967296)));
22 EXPECT_EQ(UINT64_MAX - UINT64_C(1), fxdiv_mulhi_uint64_t(UINT64_MAX, UINT64_MAX));
23 EXPECT_EQ(UINT64_C(66099812259603), fxdiv_mulhi_uint64_t(UINT64_C(12345678987654321), UINT64_C(98765432123456789)));
24 EXPECT_EQ(UINT64_C(66099812259603), fxdiv_mulhi_uint64_t(UINT64_C(98765432123456789), UINT64_C(12345678987654321)));
25 }
26
TEST(size_t,cases)27 TEST(size_t, cases) {
28 EXPECT_EQ(0, fxdiv_mulhi_size_t(0, 0));
29 EXPECT_EQ(0, fxdiv_mulhi_size_t(1, 1));
30 EXPECT_EQ(0, fxdiv_mulhi_size_t(1, SIZE_MAX));
31 EXPECT_EQ(0, fxdiv_mulhi_size_t(SIZE_MAX, 1));
32 EXPECT_EQ(SIZE_MAX - 1, fxdiv_mulhi_size_t(SIZE_MAX, SIZE_MAX));
33 }
34