96 lines
2.7 KiB
C++
96 lines
2.7 KiB
C++
#include "float.hpp"
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#include "tap.hpp"
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#include "types.hpp"
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#include <limits>
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///////////////////////////////////////////////////////////////////////////////
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void
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test_double (cruft::TAP::logger &tap)
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{
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struct sized_test {
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cruft::ieee_double::uint_t bits;
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double floating;
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};
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sized_test tests[] = {
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{ 0x3ff0000000000000, 1.0 },
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{ 0x3ff0000000000001, 1.0 + std::numeric_limits<double>::epsilon () },
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{ 0x3ff0000000000002, 1.0 + std::numeric_limits<double>::epsilon () * 2},
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{ 0x4000000000000000, 2.0 },
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{ 0xc000000000000000, -2.0 },
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{ 0x0000000000000001, std::numeric_limits<double>::denorm_min () },
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{ 0x0010000000000000, std::numeric_limits<double>::min () }, // min positive normal
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{ 0x7fefffffffffffff, std::numeric_limits<double>::max () }, // max
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{ 0x0000000000000000, 0.0 },
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{ 0x8000000000000000, -0.0 },
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{ 0x7ff0000000000000, std::numeric_limits<double>::infinity() },
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{ 0xfff0000000000000, -std::numeric_limits<double>::infinity() },
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{ 0x3fd5555555555555, 1.0 / 3.0 }
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};
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bool success = true;
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for (unsigned int i = 0; i < std::size (tests); ++i) {
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cruft::ieee_double val;
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val.set_bits (tests[i].bits);
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success = success && cruft::equal (val, tests[i].floating);
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}
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tap.expect (success, "double precision bitwise equality");
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}
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///////////////////////////////////////////////////////////////////////////////
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void
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test_single (cruft::TAP::logger &tap)
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{
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struct sized_test {
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cruft::ieee_single::uint_t bits;
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float floating;
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};
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sized_test tests[] = {
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{ 0x3f800000, 1.0f },
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{ 0xc0000000, -2.0f },
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{ 0x7f7fffff, std::numeric_limits<float>::max () },
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{ 0x00000000, 0.0f },
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{ 0x80000000, -0.0f },
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{ 0x7f800000, std::numeric_limits<float>::infinity () },
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{ 0xff800000, -std::numeric_limits<float>::infinity () },
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{ 0x3eaaaaab, 1.0f / 3.0f }
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};
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bool success = true;
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for (unsigned int i = 0; i < std::size (tests); ++i) {
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cruft::ieee_single val;
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val.set_bits (tests[i].bits);
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success = success && cruft::equal (val, tests[i].floating);
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}
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tap.expect (success, "single precision bitwise equality");
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}
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///////////////////////////////////////////////////////////////////////////////
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int
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main (int, char **) {
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cruft::TAP::logger tap;
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test_single (tap);
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test_double (tap);
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tap.expect (cruft::almost_equal (1.f, 1), "trivial float/int almost-equality");
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tap.expect (cruft::almost_equal (1, 1.f), "trivial int/float almost-equality");
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return tap.status ();
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}
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