diff options
Diffstat (limited to 'libc/test/src/math/sin_test.cpp')
| -rw-r--r-- | libc/test/src/math/sin_test.cpp | 107 |
1 files changed, 94 insertions, 13 deletions
diff --git a/libc/test/src/math/sin_test.cpp b/libc/test/src/math/sin_test.cpp index 0171b79..89534ae 100644 --- a/libc/test/src/math/sin_test.cpp +++ b/libc/test/src/math/sin_test.cpp @@ -12,22 +12,103 @@ #include "test/UnitTest/Test.h" #include "utils/MPFRWrapper/MPFRUtils.h" -#include "hdr/math_macros.h" - using LlvmLibcSinTest = LIBC_NAMESPACE::testing::FPTest<double>; namespace mpfr = LIBC_NAMESPACE::testing::mpfr; -TEST_F(LlvmLibcSinTest, Range) { - static constexpr double _2pi = 6.283185307179586; - constexpr StorageType COUNT = 100'000; - constexpr StorageType STEP = STORAGE_MAX / COUNT; - for (StorageType i = 0, v = 0; i <= COUNT; ++i, v += STEP) { - double x = FPBits(v).get_val(); - // TODO: Expand the range of testing after range reduction is implemented. - if (isnan(x) || isinf(x) || x > _2pi || x < -_2pi) - continue; - - ASSERT_MPFR_MATCH(mpfr::Operation::Sin, x, LIBC_NAMESPACE::sin(x), 1.0); +using LIBC_NAMESPACE::testing::tlog; + +TEST_F(LlvmLibcSinTest, TrickyInputs) { + constexpr double INPUTS[] = { + 0x1.940c877fb7dacp-7, 0x1.fffffffffdb6p24, 0x1.fd4da4ef37075p29, + 0x1.b951f1572eba5p+31, 0x1.55202aefde314p+31, 0x1.85fc0f04c0128p101, + 0x1.7776c2343ba4ep101, 0x1.678309fa50d58p110, 0x1.fffffffffef4ep199, + -0x1.ab514bfc61c76p+7, -0x1.f7898d5a756ddp+2, -0x1.f42fb19b5b9b2p-6, + 0x1.5f09cad750ab1p+3, -0x1.14823229799c2p+7, -0x1.0285070f9f1bcp-5, + 0x1.23f40dccdef72p+0, 0x1.43cf16358c9d7p+0, 0x1.addf3b9722265p+0, + 0x1.48ff1782ca91dp+8, 0x1.a211877de55dbp+4, 0x1.dcbfda0c7559ep+8, + 0x1.1ffb509f3db15p+5, 0x1.2345d1e090529p+5, 0x1.ae945054939c2p+10, + 0x1.2e566149bf5fdp+9, 0x1.be886d9c2324dp+6, -0x1.119471e9216cdp+10, + -0x1.aaf85537ea4c7p+3, 0x1.cb996c60f437ep+9, 0x1.c96e28eb679f8p+5, + -0x1.a5eece87e8606p+4, 0x1.e31b55306f22cp+2, 0x1.ae78d360afa15p+0, + 0x1.1685973506319p+3, 0x1.4f2b874135d27p+4, 0x1.ae945054939c2p+10, + 0x1.3eec5912ea7cdp+331, 0x1.dcbfda0c7559ep+8, 0x1.a65d441ea6dcep+4, + 0x1.e639103a05997p+2, 0x1.13114266f9764p+4, -0x1.3eec5912ea7cdp+331, + 0x1.08087e9aad90bp+887, 0x1.2b5fe88a9d8d5p+903, -0x1.a880417b7b119p+1023, + -0x1.6deb37da81129p+205, 0x1.08087e9aad90bp+887, 0x1.f6d7518808571p+1023, + -0x1.8bb5847d49973p+845, 0x1.f08b14e1c4d0fp+890, 0x1.6ac5b262ca1ffp+849, + 0x1.e0000000001c2p-20, + }; + constexpr int N = sizeof(INPUTS) / sizeof(INPUTS[0]); + + for (int i = 0; i < N; ++i) { + double x = INPUTS[i]; + ASSERT_MPFR_MATCH_ALL_ROUNDING(mpfr::Operation::Sin, x, + LIBC_NAMESPACE::sin(x), 0.5); } } + +TEST_F(LlvmLibcSinTest, InDoubleRange) { + constexpr uint64_t COUNT = 1'234'51; + uint64_t START = LIBC_NAMESPACE::fputil::FPBits<double>(0x1.0p-50).uintval(); + uint64_t STOP = LIBC_NAMESPACE::fputil::FPBits<double>(0x1.0p200).uintval(); + uint64_t STEP = (STOP - START) / COUNT; + + auto test = [&](mpfr::RoundingMode rounding_mode) { + mpfr::ForceRoundingMode __r(rounding_mode); + if (!__r.success) + return; + + uint64_t fails = 0; + uint64_t count = 0; + uint64_t cc = 0; + double mx, mr = 0.0; + double tol = 0.5; + + for (uint64_t i = 0, v = START; i <= COUNT; ++i, v += STEP) { + double x = FPBits(v).get_val(); + if (isnan(x) || isinf(x)) + continue; + LIBC_NAMESPACE::libc_errno = 0; + double result = LIBC_NAMESPACE::sin(x); + ++cc; + if (isnan(result) || isinf(result)) + continue; + + ++count; + + if (!TEST_MPFR_MATCH_ROUNDING_SILENTLY(mpfr::Operation::Sin, x, result, + 0.5, rounding_mode)) { + ++fails; + while (!TEST_MPFR_MATCH_ROUNDING_SILENTLY(mpfr::Operation::Sin, x, + result, tol, rounding_mode)) { + mx = x; + mr = result; + + if (tol > 1000.0) + break; + + tol *= 2.0; + } + } + } + if (fails) { + tlog << " Sin failed: " << fails << "/" << count << "/" << cc + << " tests.\n"; + tlog << " Max ULPs is at most: " << static_cast<uint64_t>(tol) << ".\n"; + EXPECT_MPFR_MATCH(mpfr::Operation::Sin, mx, mr, 0.5, rounding_mode); + } + }; + + tlog << " Test Rounding To Nearest...\n"; + test(mpfr::RoundingMode::Nearest); + + tlog << " Test Rounding Downward...\n"; + test(mpfr::RoundingMode::Downward); + + tlog << " Test Rounding Upward...\n"; + test(mpfr::RoundingMode::Upward); + + tlog << " Test Rounding Toward Zero...\n"; + test(mpfr::RoundingMode::TowardZero); +} |