diff options
| author | Mițca Dumitru <dumitru0mitca@gmail.com> | 2021-03-07 22:23:57 +0200 |
|---|---|---|
| committer | Andreas Kling <kling@serenityos.org> | 2021-03-09 07:28:06 +0100 |
| commit | 87b61b0eef2a5e3908cb83e319747f7ebf3bffd6 (patch) | |
| tree | 95c3ed3726fa4610f2d1d11ff0645f252a0f974d /Userland/Tests | |
| parent | 8f7aa1e03a8e053ffc087ba2ba592586ca246745 (diff) | |
| download | serenity-87b61b0eef2a5e3908cb83e319747f7ebf3bffd6.zip | |
LibM: Add scalbn and associated functions
Also implement ldexp in terms of them, and add ldexpl
Diffstat (limited to 'Userland/Tests')
| -rw-r--r-- | Userland/Tests/LibM/test-math.cpp | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/Userland/Tests/LibM/test-math.cpp b/Userland/Tests/LibM/test-math.cpp index 555e05df30..63a979d4e9 100644 --- a/Userland/Tests/LibM/test-math.cpp +++ b/Userland/Tests/LibM/test-math.cpp @@ -26,6 +26,7 @@ #include <AK/TestSuite.h> +#include <float.h> #include <math.h> TEST_CASE(trig) @@ -203,4 +204,20 @@ TEST_CASE(nextafter) EXPECT_EQ(nextafter_translator(Extractor(0x1, 0x419, 0x7d78400000000), Extractor(0x0, 0x0, 0x1)), Extractor(0x1, 0x419, 0x7d783ffffffff)); } +TEST_CASE(scalbn) +{ + EXPECT(isnan(scalbn(NAN, 3))); + EXPECT(!isfinite(scalbn(INFINITY, 5))); + EXPECT_EQ(scalbn(0, 3), 0); + EXPECT_EQ(scalbn(15.3, 0), 15.3); + + EXPECT_EQ(scalbn(0x0.0000000000008p-1022, 16), 0x0.0000000000008p-1006); + static constexpr auto biggest_subnormal = DBL_MIN - DBL_TRUE_MIN; + auto smallest_normal = scalbn(biggest_subnormal, 1); + Extractor ex(smallest_normal); + EXPECT(ex.exponent != 0); + + EXPECT_EQ(scalbn(2.0, 4), 32.0); +} + TEST_MAIN(Math) |