diff options
Diffstat (limited to 'lib/std/special/compiler_rt/floattidf_test.zig')
| -rw-r--r-- | lib/std/special/compiler_rt/floattidf_test.zig | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/lib/std/special/compiler_rt/floattidf_test.zig b/lib/std/special/compiler_rt/floattidf_test.zig new file mode 100644 index 0000000000..4914342c31 --- /dev/null +++ b/lib/std/special/compiler_rt/floattidf_test.zig @@ -0,0 +1,84 @@ +const __floattidf = @import("floattidf.zig").__floattidf; +const testing = @import("std").testing; + +fn test__floattidf(a: i128, expected: f64) void { + const x = __floattidf(a); + testing.expect(x == expected); +} + +test "floattidf" { + test__floattidf(0, 0.0); + + test__floattidf(1, 1.0); + test__floattidf(2, 2.0); + test__floattidf(20, 20.0); + test__floattidf(-1, -1.0); + test__floattidf(-2, -2.0); + test__floattidf(-20, -20.0); + + test__floattidf(0x7FFFFF8000000000, 0x1.FFFFFEp+62); + test__floattidf(0x7FFFFFFFFFFFF800, 0x1.FFFFFFFFFFFFEp+62); + test__floattidf(0x7FFFFF0000000000, 0x1.FFFFFCp+62); + test__floattidf(0x7FFFFFFFFFFFF000, 0x1.FFFFFFFFFFFFCp+62); + + test__floattidf(make_ti(0x8000008000000000, 0), -0x1.FFFFFEp+126); + test__floattidf(make_ti(0x8000000000000800, 0), -0x1.FFFFFFFFFFFFEp+126); + test__floattidf(make_ti(0x8000010000000000, 0), -0x1.FFFFFCp+126); + test__floattidf(make_ti(0x8000000000001000, 0), -0x1.FFFFFFFFFFFFCp+126); + + test__floattidf(make_ti(0x8000000000000000, 0), -0x1.000000p+127); + test__floattidf(make_ti(0x8000000000000001, 0), -0x1.000000p+127); + + test__floattidf(0x0007FB72E8000000, 0x1.FEDCBAp+50); + + test__floattidf(0x0007FB72EA000000, 0x1.FEDCBA8p+50); + test__floattidf(0x0007FB72EB000000, 0x1.FEDCBACp+50); + test__floattidf(0x0007FB72EBFFFFFF, 0x1.FEDCBAFFFFFFCp+50); + test__floattidf(0x0007FB72EC000000, 0x1.FEDCBBp+50); + test__floattidf(0x0007FB72E8000001, 0x1.FEDCBA0000004p+50); + + test__floattidf(0x0007FB72E6000000, 0x1.FEDCB98p+50); + test__floattidf(0x0007FB72E7000000, 0x1.FEDCB9Cp+50); + test__floattidf(0x0007FB72E7FFFFFF, 0x1.FEDCB9FFFFFFCp+50); + test__floattidf(0x0007FB72E4000001, 0x1.FEDCB90000004p+50); + test__floattidf(0x0007FB72E4000000, 0x1.FEDCB9p+50); + + test__floattidf(0x023479FD0E092DC0, 0x1.1A3CFE870496Ep+57); + test__floattidf(0x023479FD0E092DA1, 0x1.1A3CFE870496Dp+57); + test__floattidf(0x023479FD0E092DB0, 0x1.1A3CFE870496Ep+57); + test__floattidf(0x023479FD0E092DB8, 0x1.1A3CFE870496Ep+57); + test__floattidf(0x023479FD0E092DB6, 0x1.1A3CFE870496Ep+57); + test__floattidf(0x023479FD0E092DBF, 0x1.1A3CFE870496Ep+57); + test__floattidf(0x023479FD0E092DC1, 0x1.1A3CFE870496Ep+57); + test__floattidf(0x023479FD0E092DC7, 0x1.1A3CFE870496Ep+57); + test__floattidf(0x023479FD0E092DC8, 0x1.1A3CFE870496Ep+57); + test__floattidf(0x023479FD0E092DCF, 0x1.1A3CFE870496Ep+57); + test__floattidf(0x023479FD0E092DD0, 0x1.1A3CFE870496Ep+57); + test__floattidf(0x023479FD0E092DD1, 0x1.1A3CFE870496Fp+57); + test__floattidf(0x023479FD0E092DD8, 0x1.1A3CFE870496Fp+57); + test__floattidf(0x023479FD0E092DDF, 0x1.1A3CFE870496Fp+57); + test__floattidf(0x023479FD0E092DE0, 0x1.1A3CFE870496Fp+57); + + test__floattidf(make_ti(0x023479FD0E092DC0, 0), 0x1.1A3CFE870496Ep+121); + test__floattidf(make_ti(0x023479FD0E092DA1, 1), 0x1.1A3CFE870496Dp+121); + test__floattidf(make_ti(0x023479FD0E092DB0, 2), 0x1.1A3CFE870496Ep+121); + test__floattidf(make_ti(0x023479FD0E092DB8, 3), 0x1.1A3CFE870496Ep+121); + test__floattidf(make_ti(0x023479FD0E092DB6, 4), 0x1.1A3CFE870496Ep+121); + test__floattidf(make_ti(0x023479FD0E092DBF, 5), 0x1.1A3CFE870496Ep+121); + test__floattidf(make_ti(0x023479FD0E092DC1, 6), 0x1.1A3CFE870496Ep+121); + test__floattidf(make_ti(0x023479FD0E092DC7, 7), 0x1.1A3CFE870496Ep+121); + test__floattidf(make_ti(0x023479FD0E092DC8, 8), 0x1.1A3CFE870496Ep+121); + test__floattidf(make_ti(0x023479FD0E092DCF, 9), 0x1.1A3CFE870496Ep+121); + test__floattidf(make_ti(0x023479FD0E092DD0, 0), 0x1.1A3CFE870496Ep+121); + test__floattidf(make_ti(0x023479FD0E092DD1, 11), 0x1.1A3CFE870496Fp+121); + test__floattidf(make_ti(0x023479FD0E092DD8, 12), 0x1.1A3CFE870496Fp+121); + test__floattidf(make_ti(0x023479FD0E092DDF, 13), 0x1.1A3CFE870496Fp+121); + test__floattidf(make_ti(0x023479FD0E092DE0, 14), 0x1.1A3CFE870496Fp+121); +} + +fn make_ti(high: u64, low: u64) i128 { + var result: u128 = high; + result <<= 64; + result |= low; + return @bitCast(i128, result); +} |