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Diffstat (limited to '')
-rw-r--r-- | src/test/test_intarith.cc | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/src/test/test_intarith.cc b/src/test/test_intarith.cc new file mode 100644 index 000000000..239222046 --- /dev/null +++ b/src/test/test_intarith.cc @@ -0,0 +1,82 @@ +// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- +// vim: ts=8 sw=2 smarttab + +#include <iostream> +#include <gtest/gtest.h> + +#include "include/intarith.h" + +TEST(intarith, cbits) { + ASSERT_EQ(0u, cbits(0)); + ASSERT_EQ(1u, cbits(1)); + ASSERT_EQ(2u, cbits(2)); + ASSERT_EQ(2u, cbits(3)); + ASSERT_EQ(3u, cbits(4)); + ASSERT_EQ(0u, cbitsl(0)); + ASSERT_EQ(1u, cbitsl(1)); + ASSERT_EQ(2u, cbitsl(2)); + ASSERT_EQ(2u, cbitsl(3)); + ASSERT_EQ(3u, cbitsl(4)); + ASSERT_EQ(9u, cbits(0x100)); + ASSERT_EQ(32u, cbits(0xffffffff)); + ASSERT_EQ(32u, cbitsl(0xffffffff)); + ASSERT_EQ(32u, cbitsll(0xffffffff)); + ASSERT_EQ(64u, cbitsll(0xffffffffffffffff)); +} + +TEST(intarith, clz) { + ASSERT_EQ(32u, clz(0)); + ASSERT_EQ(31u, clz(1)); + ASSERT_EQ(30u, clz(2)); + ASSERT_EQ(30u, clz(3)); + ASSERT_EQ(29u, clz(4)); + ASSERT_EQ(64u, clzll(0)); + ASSERT_EQ(63u, clzll(1)); + ASSERT_EQ(62u, clzll(2)); + ASSERT_EQ(62u, clzll(3)); + ASSERT_EQ(61u, clzll(4)); + ASSERT_EQ(23u, clz(0x100)); + ASSERT_EQ(55u, clzll(0x100)); + ASSERT_EQ(0u, clz(0xffffffff)); + ASSERT_EQ(32u, clzll(0xffffffff)); + ASSERT_EQ(0u, clzll(0xffffffffffffffff)); +} + +TEST(intarith, ctz) { + ASSERT_EQ(32u, ctz(0)); + ASSERT_EQ(0u, ctz(1)); + ASSERT_EQ(1u, ctz(2)); + ASSERT_EQ(0u, ctz(3)); + ASSERT_EQ(2u, ctz(4)); + ASSERT_EQ(64u, ctzll(0)); + ASSERT_EQ(0u, ctzll(1)); + ASSERT_EQ(1u, ctzll(2)); + ASSERT_EQ(0u, ctzll(3)); + ASSERT_EQ(2u, ctzll(4)); + ASSERT_EQ(8u, ctz(0x100)); + ASSERT_EQ(8u, ctzll(0x100)); + ASSERT_EQ(0u, ctz(0xffffffff)); + ASSERT_EQ(0u, ctzl(0xffffffff)); + ASSERT_EQ(0u, ctzll(0xffffffff)); + ASSERT_EQ(20u, ctzll(0xffffffff00000)); + ASSERT_EQ(48u, ctzll(0xff000000000000ull)); +} + +TEST(intarith, p2family) { + ASSERT_TRUE(isp2(0x100)); + ASSERT_FALSE(isp2(0x1234)); + + ASSERT_EQ(1024, p2align(1200, 1024)); + ASSERT_EQ(1024, p2align(1024, 1024)); + ASSERT_EQ(0x1200, p2align(0x1234, 0x100)); + ASSERT_EQ(0x5600, p2align(0x5600, 0x100)); + + ASSERT_EQ(0x34, p2phase(0x1234, 0x100)); + ASSERT_EQ(0x00, p2phase(0x5600, 0x100)); + + ASSERT_EQ(0xcc, p2nphase(0x1234, 0x100)); + ASSERT_EQ(0x00, p2nphase(0x5600, 0x100)); + + ASSERT_EQ(0x1300, p2roundup(0x1234, 0x100)); + ASSERT_EQ(0x5600, p2roundup(0x5600, 0x100)); +} |