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duplicate tests for both float and double

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This commit is contained in:
Anders Dalvander 2024-12-02 16:39:33 +01:00
parent c62b853648
commit 3b9ff76143
1 changed files with 148 additions and 10 deletions
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158
tests/basictest.cpp
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@ -127,32 +127,32 @@ TEST_CASE("system_info") {
std::cout << std::endl;
}
TEST_CASE("float.rounds_to_nearest") {
TEST_CASE("double.rounds_to_nearest") {
//
// If this function fails, we may be left in a non-standard rounding state.
//
static float volatile fmin = std::numeric_limits<float>::min();
static double volatile fmin = std::numeric_limits<double>::min();
fesetround(FE_UPWARD);
std::cout << "FE_UPWARD: fmin + 1.0f = " << fHexAndDec(fmin + 1.0f)
<< " 1.0f - fmin = " << fHexAndDec(1.0f - fmin) << std::endl;
std::cout << "FE_UPWARD: fmin + 1.0 = " << fHexAndDec(fmin + 1.0)
<< " 1.0 - fmin = " << fHexAndDec(1.0 - fmin) << std::endl;
CHECK(fegetround() == FE_UPWARD);
CHECK(fast_float::detail::rounds_to_nearest() == false);
fesetround(FE_DOWNWARD);
std::cout << "FE_DOWNWARD: fmin + 1.0f = " << fHexAndDec(fmin + 1.0f)
<< " 1.0f - fmin = " << fHexAndDec(1.0f - fmin) << std::endl;
std::cout << "FE_DOWNWARD: fmin + 1.0 = " << fHexAndDec(fmin + 1.0)
<< " 1.0 - fmin = " << fHexAndDec(1.0 - fmin) << std::endl;
CHECK(fegetround() == FE_DOWNWARD);
CHECK(fast_float::detail::rounds_to_nearest() == false);
fesetround(FE_TOWARDZERO);
std::cout << "FE_TOWARDZERO: fmin + 1.0f = " << fHexAndDec(fmin + 1.0f)
<< " 1.0f - fmin = " << fHexAndDec(1.0f - fmin) << std::endl;
std::cout << "FE_TOWARDZERO: fmin + 1.0 = " << fHexAndDec(fmin + 1.0)
<< " 1.0 - fmin = " << fHexAndDec(1.0 - fmin) << std::endl;
CHECK(fegetround() == FE_TOWARDZERO);
CHECK(fast_float::detail::rounds_to_nearest() == false);
fesetround(FE_TONEAREST);
std::cout << "FE_TONEAREST: fmin + 1.0f = " << fHexAndDec(fmin + 1.0f)
<< " 1.0f - fmin = " << fHexAndDec(1.0f - fmin) << std::endl;
std::cout << "FE_TONEAREST: fmin + 1.0 = " << fHexAndDec(fmin + 1.0)
<< " 1.0 - fmin = " << fHexAndDec(1.0 - fmin) << std::endl;
CHECK(fegetround() == FE_TONEAREST);
#if (FLT_EVAL_METHOD == 1) || (FLT_EVAL_METHOD == 0)
CHECK(fast_float::detail::rounds_to_nearest() == true);
@ -265,6 +265,144 @@ TEST_CASE("double.parse_negative_zero") {
CHECK(float64_parsed == 0x8000'0000'0000'0000);
}
TEST_CASE("float.rounds_to_nearest") {
//
// If this function fails, we may be left in a non-standard rounding state.
//
static float volatile fmin = std::numeric_limits<float>::min();
fesetround(FE_UPWARD);
std::cout << "FE_UPWARD: fmin + 1.0f = " << fHexAndDec(fmin + 1.0f)
<< " 1.0f - fmin = " << fHexAndDec(1.0f - fmin) << std::endl;
CHECK(fegetround() == FE_UPWARD);
CHECK(fast_float::detail::rounds_to_nearest() == false);
fesetround(FE_DOWNWARD);
std::cout << "FE_DOWNWARD: fmin + 1.0f = " << fHexAndDec(fmin + 1.0f)
<< " 1.0f - fmin = " << fHexAndDec(1.0f - fmin) << std::endl;
CHECK(fegetround() == FE_DOWNWARD);
CHECK(fast_float::detail::rounds_to_nearest() == false);
fesetround(FE_TOWARDZERO);
std::cout << "FE_TOWARDZERO: fmin + 1.0f = " << fHexAndDec(fmin + 1.0f)
<< " 1.0f - fmin = " << fHexAndDec(1.0f - fmin) << std::endl;
CHECK(fegetround() == FE_TOWARDZERO);
CHECK(fast_float::detail::rounds_to_nearest() == false);
fesetround(FE_TONEAREST);
std::cout << "FE_TONEAREST: fmin + 1.0f = " << fHexAndDec(fmin + 1.0f)
<< " 1.0f - fmin = " << fHexAndDec(1.0f - fmin) << std::endl;
CHECK(fegetround() == FE_TONEAREST);
#if (FLT_EVAL_METHOD == 1) || (FLT_EVAL_METHOD == 0)
CHECK(fast_float::detail::rounds_to_nearest() == true);
#endif
}
TEST_CASE("float.parse_zero") {
//
// If this function fails, we may be left in a non-standard rounding state.
//
char const *zero = "0";
uint32_t float32_parsed;
float f = 0;
::memcpy(&float32_parsed, &f, sizeof(f));
CHECK(float32_parsed == 0);
fesetround(FE_UPWARD);
auto r1 = fast_float::from_chars(zero, zero + 1, f);
CHECK(r1.ec == std::errc());
std::cout << "FE_UPWARD parsed zero as " << fHexAndDec(f) << std::endl;
CHECK(f == 0);
::memcpy(&float32_parsed, &f, sizeof(f));
std::cout << "float as uint32_t is " << iHexAndDec(float32_parsed)
<< std::endl;
CHECK(float32_parsed == 0);
fesetround(FE_TOWARDZERO);
auto r2 = fast_float::from_chars(zero, zero + 1, f);
CHECK(r2.ec == std::errc());
std::cout << "FE_TOWARDZERO parsed zero as " << fHexAndDec(f) << std::endl;
CHECK(f == 0);
::memcpy(&float32_parsed, &f, sizeof(f));
std::cout << "float as uint32_t is " << iHexAndDec(float32_parsed)
<< std::endl;
CHECK(float32_parsed == 0);
fesetround(FE_DOWNWARD);
auto r3 = fast_float::from_chars(zero, zero + 1, f);
CHECK(r3.ec == std::errc());
std::cout << "FE_DOWNWARD parsed zero as " << fHexAndDec(f) << std::endl;
CHECK(f == 0);
::memcpy(&float32_parsed, &f, sizeof(f));
std::cout << "float as uint32_t is " << iHexAndDec(float32_parsed)
<< std::endl;
CHECK(float32_parsed == 0);
fesetround(FE_TONEAREST);
auto r4 = fast_float::from_chars(zero, zero + 1, f);
CHECK(r4.ec == std::errc());
std::cout << "FE_TONEAREST parsed zero as " << fHexAndDec(f) << std::endl;
CHECK(f == 0);
::memcpy(&float32_parsed, &f, sizeof(f));
std::cout << "float as uint32_t is " << iHexAndDec(float32_parsed)
<< std::endl;
CHECK(float32_parsed == 0);
}
TEST_CASE("float.parse_negative_zero") {
//
// If this function fails, we may be left in a non-standard rounding state.
//
char const *negative_zero = "-0";
uint32_t float32_parsed;
float f = -0.;
::memcpy(&float32_parsed, &f, sizeof(f));
CHECK(float32_parsed == 0x8000'0000);
fesetround(FE_UPWARD);
auto r1 = fast_float::from_chars(negative_zero, negative_zero + 2, f);
CHECK(r1.ec == std::errc());
std::cout << "FE_UPWARD parsed negative zero as " << fHexAndDec(f)
<< std::endl;
CHECK(f == 0);
::memcpy(&float32_parsed, &f, sizeof(f));
std::cout << "float as uint32_t is " << iHexAndDec(float32_parsed)
<< std::endl;
CHECK(float32_parsed == 0x8000'0000);
fesetround(FE_TOWARDZERO);
auto r2 = fast_float::from_chars(negative_zero, negative_zero + 2, f);
CHECK(r2.ec == std::errc());
std::cout << "FE_TOWARDZERO parsed negative zero as " << fHexAndDec(f)
<< std::endl;
CHECK(f == 0);
::memcpy(&float32_parsed, &f, sizeof(f));
std::cout << "float as uint32_t is " << iHexAndDec(float32_parsed)
<< std::endl;
CHECK(float32_parsed == 0x8000'0000);
fesetround(FE_DOWNWARD);
auto r3 = fast_float::from_chars(negative_zero, negative_zero + 2, f);
CHECK(r3.ec == std::errc());
std::cout << "FE_DOWNWARD parsed negative zero as " << fHexAndDec(f)
<< std::endl;
CHECK(f == 0);
::memcpy(&float32_parsed, &f, sizeof(f));
std::cout << "float as uint32_t is " << iHexAndDec(float32_parsed)
<< std::endl;
CHECK(float32_parsed == 0x8000'0000);
fesetround(FE_TONEAREST);
auto r4 = fast_float::from_chars(negative_zero, negative_zero + 2, f);
CHECK(r4.ec == std::errc());
std::cout << "FE_TONEAREST parsed negative zero as " << fHexAndDec(f)
<< std::endl;
CHECK(f == 0);
::memcpy(&float32_parsed, &f, sizeof(f));
std::cout << "float as uint32_t is " << iHexAndDec(float32_parsed)
<< std::endl;
CHECK(float32_parsed == 0x8000'0000);
}
#if FASTFLOAT_SUPPLEMENTAL_TESTS
// C++ 17 because it is otherwise annoying to browse all files in a directory.
// We also only run these tests on little endian systems.