Danny Robson
7b083df977
almost_equal only operates on two reals, or two integers (and even then only on the same signedness).
66 lines
2.5 KiB
C++
66 lines
2.5 KiB
C++
#include "bitwise.hpp"
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#include "tap.hpp"
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//-----------------------------------------------------------------------------
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static void
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test_rotate (util::TAP::logger &tap)
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{
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tap.expect_eq (rotatel (uint8_t (0x0F), 0), 0x0Fu, "rotate-left u8");
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tap.expect_eq (rotatel (uint8_t (0x0F), 4), 0xF0u, "rotate-left u8");
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tap.expect_eq (rotatel (uint8_t (0xF0), 4), 0x0Fu, "rotate-left u8");
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tap.expect_eq (rotatel (uint8_t (0x0F), 8), 0x0Fu, "rotate-left u8");
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tap.expect_eq (rotater (uint8_t (0x0F), 0), 0x0Fu, "rotate-right u8");
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tap.expect_eq (rotater (uint8_t (0x0F), 4), 0xF0u, "rotate-right u8");
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tap.expect_eq (rotater (uint8_t (0xF0), 4), 0x0Fu, "rotate-right u8");
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tap.expect_eq (rotater (uint8_t (0x0F), 8), 0x0Fu, "rotate-right u8");
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tap.expect_eq (rotatel (uint16_t (0xABCD), 0), 0xABCDu, "rotate-left u16");
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tap.expect_eq (rotatel (uint16_t (0xABCD), 4), 0xBCDAu, "rotate-left u16");
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tap.expect_eq (rotatel (uint16_t (0xABCD), 8), 0xCDABu, "rotate-left u16");
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tap.expect_eq (rotatel (uint16_t (0xABCD), 12), 0xDABCu, "rotate-left u16");
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tap.expect_eq (rotatel (uint16_t (0xABCD), 16), 0xABCDu, "rotate-left u16");
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tap.expect_eq (rotater (uint16_t (0xABCD), 0), 0xABCDu, "rotate-right u16");
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tap.expect_eq (rotater (uint16_t (0xABCD), 4), 0xDABCu, "rotate-right u16");
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tap.expect_eq (rotater (uint16_t (0xABCD), 8), 0xCDABu, "rotate-right u16");
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tap.expect_eq (rotater (uint16_t (0xABCD), 12), 0xBCDAu, "rotate-right u16");
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tap.expect_eq (rotater (uint16_t (0xABCD), 16), 0xABCDu, "rotate-right u16");
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tap.expect_eq (rotatel (uint32_t (0x12345670), 12), 0x45670123u, "rotate-left u32");
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tap.expect_eq (rotater (uint32_t (0x12345670), 12), 0x67012345u, "rotate-right u32");
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tap.expect_eq (rotatel (uint64_t (0x1234567890ABCDEF), 12), 0x4567890ABCDEF123u, "rotate-left u64");
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tap.expect_eq (rotater (uint64_t (0x1234567890ABCDEF), 12), 0xDEF1234567890ABCu, "rotate-right u64");
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}
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//-----------------------------------------------------------------------------
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void
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test_reverse (util::TAP::logger &tap)
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{
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size_t matches = 0;
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for (unsigned i = 0; i < 256; ++i) {
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auto first = reverse<uint8_t> (i);
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auto last = reverse<uint8_t> (first);
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if (last == i)
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matches++;
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}
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tap.expect_eq (matches, 256u, "exhaustive 8 bit reverse");
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}
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//-----------------------------------------------------------------------------
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int
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main (int, char**)
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{
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util::TAP::logger tap;
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test_rotate (tap);
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test_reverse (tap);
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return 0;
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}
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